Question 1: Is silicone a type of plastic?

Silicone is not a plastic. Silicone rubber: silicone rubber is a highly reactive adsorbent material, which is an amorphous substance with the chemical formula mSiO2・nH2O. insoluble in water and any solvent, non-toxic and tasteless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid. Various types of silica gel have different microporous structures due to different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc. Silicone rubber is classified according to its pore size: large pore silica gel, coarse pore silica gel, B-type silica gel, fine pore silica gel.

Question 2: The difference between pvc rubber and ordinary rubber

PVC is not rubber at all, it should belong to plastic. Plastic is generally hard, rubber is generally soft, but this is not absolute. pvc soft rubber is a special case. It is because PVC soft rubber feels like rubber, but in fact it is not rubber at all. Rubber is divided into natural rubber, styrene-butadiene rubber, neoprene, nitrile rubber, silicone rubber and so on, nearly 20 kinds. Rubber is one of the polymer materials.

High elasticity at room temperature is a unique feature of rubber materials, which is not available in any other material, so rubber is also called elastomer. Highly elastic materials are characterized by a large elastic deformation up to 1000% under external forces and a rapid recovery of deformation after removal of external forces, while the deformation of metallic materials with general elasticity is only about 1%.

What is rubber, as defined in ASTM D1566: Rubber is a material that can be modified to recover its deformation quickly and forcefully under large deformation. Modification essentially means vulcanization. Raw rubber, i.e., rubber that has not been cross-linked, consists of linear macromolecules or macromolecules with branched chains. It has three states, namely, glassy, highly elastic and viscous flow state, as the temperature changes. The unvulcanized rubber becomes hard at low temperature and soft at high temperature, has no ability to keep its shape and has low mechanical properties, so it is basically useless and must be vulcanized before it can be used. In other words, raw rubber needs a series of processing to make useful rubber products, thus giving rise to the rubber processing industry.

The processing of PVC does not require vulcanization. If you light it on fire, PVC will turn into liquid, while rubber will only turn into ash. From this appearance, it is easy to distinguish them. Also rubber is mostly industrial products. Only a few of them are used in daily life. For example, tires, hoses, tapes, sealing products, vibration damping products and so on.

Question 3: What is the difference between silicone and plastic?

Silicone rubber is a highly active adsorbent material, insoluble in water and any solvent, non-toxic and tasteless, chemically stable, does not react with any substance except strong alkali and hydrofluoric acid. Various types of silica gel form different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc. Silicone is classified according to its pore size: large pore silica gel, coarse pore silica gel, B-type silica gel, fine pore silica gel.

Plastic is a kind of material with high molecular weight organic substance as the main component, it presents solid shape when processing is completed, and it can be shaped by flowing in the manufacturing as well as processing process.

We are a supplier of silicone hoses, offering a range of products including 1 inch silicone hose and We offer a wide range of silicone products such as 2 inch silicone coupler. If there is a need, you can contact us.

Question 1: Are silicone and plastic the same?

Plastic is also often called plastic, but silicone and plastic and rubber, despite having the word rubber in their names, are very far apart in nature.
Plastic and rubber are essentially similar, being a mixture of compounds based on polymeric hydrocarbon chains.

Silica gel can be divided into two categories according to its nature and components: organic silica gel and inorganic silica gel.

Inorganic silica gel is a highly reactive adsorbent material, usually made by reacting sodium silicate with sulfuric acid and undergoing a series of post-treatment processes such as aging and acid soaking. Silica gel is an amorphous substance, and its chemical molecular formula is mSiO2 ．nH2O.

Silicone is an organosilicon compound, which is a compound containing Si-C bond, and at least one organic group is directly connected with silicon atoms, and it is also customary to treat those compounds with organic groups connected with silicon atoms through oxygen, sulfur, nitrogen, etc. as organosilicon compounds. Among them, the silicon-oxygen bond (-Si-O-Si-) as the backbone composition of polysiloxanes, is the most applied category, accounting for about 90% or more of the total amount.

Question 2: Which guru knows the difference and characteristics of plastic, silicone and rubber materials

Definition of plastic: mainly by carbon, oxygen, hydrogen and nitrogen and other organic or inorganic elements, the finished product is a solid, molten liquid in the manufacturing process, so it can be heated to melt, pressure to make it flow, cooling to cure, and the formation of a variety of shapes, this large and varied material groups called plastic.

Plastic: is a high molecular weight synthetic resin as the main component, adding appropriate additives, such as plasticizers, stabilizers, flame retardants, lubricants, colorants, etc., through the processing of plastic (flexible) materials, or curing cross-linked to form a rigid material.

Silica gel: silicate gel is a highly active adsorbent material, an amorphous substance, its chemical molecular formula is mSiO2・nH2O; it does not react with any substance except strong alkali and hydrofluoric acid, insoluble in water and any solvent, non-toxic and tasteless, chemically stable. Various types of silica gel have different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silicone determine that it has many characteristics that are difficult to replace by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc.

Early rubber was made from the latex of rubber trees, rubber grasses, and other plants, and was processed to produce a material that was elastic, insulating, and impervious to water and air. Highly elastic polymer compound. There are two types of rubber: natural rubber and synthetic rubber. Natural rubber is made by extracting gum from rubber trees, rubber grass and other plants, while synthetic rubber is made by polymerization of various monomers. Rubber products are widely used in industry or in various aspects of life.

Question 3: Is silicone a kind of plastic?

The “silicone” you are talking about is actually silicone rubber, which is not a plastic. The specific customs code can be found in the manual.
The real sense of “silicone” refers to the silicone as the main functional component of the colloid-like substances, such as silicone sealant, color-changing silicone, etc.

We are a supplier of silicone hose products, including silicone hose reducers and silicone hose elbows. If there is a need, you can contact us.

Although it is incorrectly referred to as “bar iron” or “rotten iron”, the correct term is “wrought iron”. The word “wrought” comes from the verb “to work” and wrought iron implies “worked iron” or “forged iron”. Historically, wrought iron was worked by blacksmiths, using traditional techniques such as hammers and anvils to create high-end “decorative wrought ironwork”.

What is black iron?

Black iron is a specific term given to a particular type of unit. More commonly known as “black iron pipe”, black iron is commonly used in fire sprinklers due to its high heat resistance. It can also be found in water supply lines, as it can withstand almost any form of water damage. This metal is very dark in color and is formed from iron oxide. This is why it is often referred to as black iron.

This may sound a lot like cast iron, but there is one big difference. Cast iron is melted and shaped, while black iron is a wrought iron that is heated and machined into its current shape.

What is cast iron?

Cast iron is usually referred to as gray cast iron. Due to its high carbon content (about 3% compared to 0.15% for wrought iron), it tends to have a brittle and hard surface. Cast iron is made by remelting pig iron, and often large amounts of scrap iron and steel scrap. Once melting is complete, the molten iron is poured into a mold for forming. Thus, once the mold is ready, it is ready for mass production.

Although the difference is not visible to the naked eye, the difference in quality and value is enormous. When wrought or bent or welded, wrought iron is soft, while cast iron is not. Cast iron is more fragile and breaks easily, while wrought iron will bend rather than break. In addition, wrought iron can be welded and galvanized very easily, while cast iron cannot.

At KC Fabricators, we have the capability to work with black iron to form it into its needed shape. We are a Wrought Black manufacturer.

Benefits of Wrought Iron Single Door

There are many benefits to choosing an iron single door design. Single doors are much more common than double doors.

Wrought Iron Single Door take up less space, so if your home is smaller or you have a small entryway, it may make more sense to choose a Wrought Iron Single Door.

You decide to go with a single door, and choosing an iron door will still enhance the style of your home.

If you want a single door with an upgraded look, the extra-wide option can add a touch of unexpected elegance. That’s what iron doors are designed to do.

Be sure to talk to your installer to make sure you have enough space at your entrance for a double door option before committing to the idea. Choosing a unique door handle can change the look of a door and make it even more unique.

You may also want to work with a custom door company to make sure your Wrought Iron Single Door matches the style of your home.

Disadvantages of double entry doors

As you may think, double-wide entry doors cost more money. Not only do you have to buy two doors instead of one, but the surrounding architecture can be more expensive.

Even if you have the budget for this, you may not have enough space. While double doors look great, sometimes a single door may look (and simply work) better.

If you want a little more width than a typical entrance door, you might consider a wider single door instead.

　　Introduction

　　Inventory is the material stockpiled for sale or consumption in the process of production and operation, which usually accounts for the largest proportion of current assets and reflects the operating characteristics of the enterprise better than other assets, and its material misstatement will have a direct impact on financial position, operating results and cash flow. Therefore, inventory audits are often the focus and difficulty of statement audits.

　　The financial attributes of non-ferrous commodities determine that financial leverage can be used for investment speculation, value preservation or financing, and the profit performance of enterprises is closely related to the ups and downs of their prices, therefore, the value of non-ferrous commodities and risk management become the top priority of many non-ferrous enterprises. At the same time, the internal audit of non-ferrous bulk commodity inventory has both universal and individualized needs because of its high value, high risk, and constantly new trade patterns. This paper discusses the issues that should be focused on from the internal audit perspective, based on the internal audit practice of trading companies, combined with the characteristics of non-ferrous metal bulk commodity inventory business and the risk points under the new business model.

　　Non-ferrous metal trade model and its risk points

　　As an important industrial raw material, nonferrous metals have wide application fields, large scale of production and consumption, and growing trade volume year by year. At the same time, many varieties of non-ferrous metal bulk commodities have futures and high price transparency, and simple low-buy-high-sell profits are meager. Furthermore, the financial attributes and good natural properties of non-ferrous metal commodities have become the first choice for inventory financing. Therefore, the non-ferrous metal commodity trade model is constantly pushing forward. At present, the trade model can be divided into two kinds of traditional trade and financing trade.

　　The traditional trade profit model is to hold the goods waiting for the rise or change hands to earn the price difference. Due to the high volatility of non-ferrous metal prices, the risk of stable profitability is high, and the trade practice mostly uses futures for hedging.

　　Financing trade is to non-ferrous metal bulk commodity inventory as a pledge, the demand for funds to banks or other providers of funds to obtain loans, in practice, there are inventory pledge financing and warehouse receipts pledge financing and other forms.

　　(1) Risk points in non-ferrous metal trade

　　Since the environment of commodity trade financing is not fully mature, there are many risks hidden in the business development. For enterprises, price risk, open position risk, capital risk and pledge risk are the major risk points in trade financing directly related to the inventory.

　　First of all, in non-ferrous metal commodity trading, the price is relatively transparent, and the final price is determined based on futures prices between buyers and sellers. In the fluctuating futures market, it is important to effectively manage price risk in order to obtain stable profits or reduce losses.

　　Second, non-ferrous metal prices fluctuate frequently, and inventories are exposed to price risk if they have exposure. Locking in purchasing costs and sales profits, controlling the size of open positions and stopping losses in a timely manner are crucial to sound business operation.

　　Thirdly, whether the financed funds are obtained with pledges of equivalent value, and whether the funds can be obtained in time to replenish the pledges or have the right to dispose of the pledges to make up for the loss of funds when the value of the pledges changes below the amount of financed funds, is also a major risk point for the financed funds.

　　Fourth, non-ferrous metals bulk commodity trade financing is based on pledges, whether the pledges are clear and whether the pledges chosen are easy to realize has a deep impact on the enterprises that finance the funds.

　　The above major risk points have a pivotal role in the evaluation of the business performance of non-ferrous metal trading enterprises and their operation in future years.

　　The focus of internal audit of non-ferrous metal commodity trading inventory

　　Internal audit should not only focus on the risk prevention and control mechanism and internal control mechanism of the enterprise, but also focus on the price formation of the inventory, verify the quantity and ownership of the inventory, and determine whether the inventory value is true and whether there is a potential loss.

　　(1) Review of risk prevention and control and internal control of bulk commodity inventories

　　Enterprises should establish a sound comprehensive risk management system and strengthen the identification and prevention of risks in the bulk commodity trading business. Select reliable and suitable business models, and choose to avoid business models with high risks; focus on inventory, contracts, receivables and prepayments, customer credit, storage inventory and ownership, pledge guarantee of goods or warehouse receipts, third-party supervision, etc. involved in the business; sort out and improve the internal control and management system of bulk commodity trade, establish customer qualification and credit investigation and follow-up management system, and prevent both up and down By the same person to control the occurrence of funds were siphoned; strictly prohibit the development of no real goods transactions, no physical commodities, no flow of goods or in situ inventory of the financing trade and “idle” trade business.

　　Therefore, the internal audit of non-ferrous metal commodity trade should first focus on the internal and external environment of the audited unit and the significant risk factors, whether the audited unit has established a risk prevention and control mechanism, whether the trade business model, risk assessment, cost-benefit analysis, and whether the systemic risk response measures have been formulated. The auditors can reasonably identify and assess the financial situation based on risk prevention and control? Hydrazinium is the most important component of the business.

　　Secondly, the review of the development and implementation of the internal control system for each aspect of the bulk commodity inventory, focusing on the following two aspects of the implementation of the audit: First, to review whether the inventory management system is sound and effective, at least should include the specification of key aspects such as receipt and delivery, receipt and payment, review and approval, graded authorization, supervision and checks and balances; second, to review whether the internal control system is effectively implemented and enforced, and whether regular self-evaluation of The key aspects of internal control are self-evaluated and self-improved.

　　(2) Review the quantity of bulk commodity inventory

　　Internal auditors should do a good job in monitoring the physical inventory of inventory stock to determine whether the inventory of the audited unit really exists and whether it is consistent with the book records; they should also obtain relevant supporting documents to determine whether the audited unit has the real ownership of the inventory. When monitoring the inventory in the field, we should pay special attention to whether or not the goods arrive, the goods are sent but not received, the goods are received but not sent, as well as whether or not the mortgage, pledge, entrusted processing and other circumstances are recorded to find out the reasons for the discrepancy between the accounts and the reality.

　　The use of non-ferrous metals bulk commodity trade for financing, especially warehouse receipt pledge financing business, the focus should be reviewed delivery link, whether the actual control of goods and the flow of goods, if only processing, passing the contract documents “empty” trade, so that it is firmly put an end to.

　　(3) Review the formation of inventory prices

　　Futures prices are highly correlated with spot prices and can reflect the changes in market supply and demand in advance, and the non-ferrous metal commodity trade is mostly priced by the trading mode of “futures price + premium”. In practice, there are two base price selection methods: monthly average price and point price. The monthly average price is the average monthly settlement price of the futures market, while the point price is negotiated with the market. How the base price is applied depends largely on the agreement of the buyer and seller. 　　Reviewing the formation of non-ferrous metal price inventory prices, the first thing to focus on is the choice of base price. From a practical point of view, monthly average pricing is less risky and point prices are more risky.

　　Second, if the point price is chosen, it depends on the right of the buyer and seller to point price, i.e., who decides to set the price within a specified period. If the audited entity has the right to point price, it is important to pay attention to whether the point price is set by the deadline. If the point price is postponed, an additional deposit is required from the other party and an extension fee is paid, which will increase the cost of the point price.

　　Again, it is important to pay attention to whether the price ordered is significantly different from the market price. If there is any abnormality, it is necessary to find the reason.

　　(4) Review the valuation method of bulk commodity inventory

　　If the audited unit does not comply with the principle of consistency of inventory valuation method, it can change the inventory valuation method at will to achieve the purpose of adjusting the cost of sales and thus the profit. In the non-ferrous metal commodity trade, the physical form of inventory is usually supervised by a third party, so there is no room for cheating. In enterprises with profit target pressure, the practice of changing inventory valuation methods to adjust profits during the year is most common. For example, a company’s year-end copper outbound carryover method is changed from cumulative weighted average method to LIFO method, which results in a reduction in cost of sales and an inflated profit in the case of unilateral decline in market price.

　　Secondly, due to the many changes in the form and flow of inventory, there are certain differences between the value carryover and the actual flow procedures, and if they are not consistent, it will affect the whole process of the accounting cycle. If the non-ferrous metal bulk commodity encounters significant fluctuations in market prices, especially in the process of unilateral decline in market prices, the value carry forward can also achieve the purpose of profit reconciliation if it is not the same period and batch as the actual flow. For example, a company in December of a year a total of 50,000 tons of copper, the first batch of 50,000 tons of the average purchase price of 30,000 yuan / ton, the second batch of 50,000 tons of the average purchase price of 28,000 yuan / ton, the enterprise daily use a moving weighted average method to carry forward costs at the end of the month, December in two warehouses, and the second batch of low-priced copper first, the second batch of high-priced copper after warehousing, this practice leads to the second moving This practice resulted in a smaller second moving weighted average base, a reduction in the cost of outbound storage and an increase in profit for the year.

　　Third, in commodity trade, logistics, capital flow and bill circulation are often inextricably linked. For the goods to the payment of bills not yet arrived, the goods sent to the receipt of bills not yet opened inventory should not only check the differences between the accounts and inventory quantities, but also pay attention to the reconciliation with accounts prepaid, accounts received in advance and other accounts to review whether there is a duplication of pending accounts, the phenomenon of inflated inventory and liabilities.

　　Fourth, review whether the provision for inventory decline at the end of the period of inventory is reasonable and accurate. When the non-ferrous metal bulk commodity trade is in the process of unilateral price decline, if no value preservation is carried out, the purchase and sale loss may occur. Internal audit should pay attention to whether the audited unit has made or fully provided for impairment in accordance with the market price and whether there is potential loss.

　　Fifth, using the method of horizontal or vertical comparison, excluding the factor of price increase and decrease, whether the price is reasonable compared with the recent or similar brand and quality of inventory, and the price is much higher should be regarded as a potential loss. For example, the auditors found in the audit of the sales price of aluminum commodities of a non-ferrous trading enterprise, the sales price for the month was mostly within the range of 12,000-15,000 yuan/ton, but several sales prices were 20,000-25,000 yuan/ton, and after finding the reason, it was found that the enterprise artificially raised the sales price to complete the sales revenue target at the end of the year, and intended to buy back in the next year. This business resulted in inflated profits for the year and formed a potential loss for the next year.

　　(5) Review of exposure to commodity inventories

　　Non-ferrous metal bulk commodities have a mature futures market, which is an integral part of the overall financial market. The use of financial leverage to speculate, preserve or finance and pursue higher returns on investment is highly favored by many companies. In order to hedge the risk of non-ferrous metal price fluctuations and financing risks and reduce losses, it becomes a daily task for non-ferrous enterprises to pay attention to the risk exposure of commodity inventories.

　　Internal audit review of non-ferrous metal bulk commodity exposure should focus on the following aspects.

　　First, review whether the risk prevention and control mechanism of graded authorization, limit approval, risk monitoring and timely stop loss is established and whether the risk prevention and control mechanism is followed in the actual operation process.

　　Second, review the flow process of the business to see whether the inventory spot is preserved, whether the amount of preservation exceeds the risk tolerance of the enterprise, and whether there exists a speculative position, suggesting the potential profit or loss brought by the risk exposure to the enterprise.

　　Thirdly, review whether the financed funds obtain pledges, whether the pledges’ ownership is complete, whether the appraised value covers the financed funds, and whether the pledges can be realized in time, whether the pledges are entitled to dispose of the depreciated value, and other matters to determine whether the financed funds can be recovered safely and completely.

　　(6) Internal audit recommendations in light of the actual situation

　　The internal auditors shall conduct an in-depth analysis of the inventory audit found in the ? issues for in-depth analysis, diagnose the root cause of their generation, combine with the business model of the audited unit, reveal the deficiencies and improprieties in inventory management procedures, and put forward improvement suggestions so that the audited unit can improve the economy and efficiency of inventory management activities through the implementation of internal audit recommendations to better prevent and control operational risks and ensure the safety of corporate assets.

　　Conclusion

　　Inventory has a direct impact on the business results of enterprises, and it is very easy to become the object of corporate fraud. For non-ferrous metal commodity trading enterprises, inventory is the most direct and effective tool for fraud. New business models constantly bring new challenges to internal audit, internal audit should be combined with different business models of different companies, the audit object and audit content to make timely adjustments, around the focus of business operations, hot spots and difficult points, we should take the initiative, targeted cut, find risk points, find the value-added audit point, realize the internal audit function from post-facto audit supervision to the change of prior and in-fact control, and constantly To enhance the value of internal audit, and finally escort the enterprise and realize value-added.

　　Concrete is a mixed material, which is composed of coarse aggregate, fine aggregate, cement and other additives, and cement will undergo heat of hydration reaction, which will lead to temperature cracks in concrete, which seriously affects the construction quality of housing construction projects.

The following author briefly introduces the causes of problems in the construction of concrete for housing construction and the causes of problems in the construction process, and analyzes the measures to improve the quality of housing construction, hoping to provide some help to the construction units.

In the future construction, effectively reduce the quality problems as well as safety hazards, reasonable application of concrete and other important construction materials, so as to extend the construction life of housing buildings.

　　1 The problems of concrete construction of housing buildings

　　1.1 Problems of concrete raw materials

　　In the housing construction project, there are many construction materials that need to be applied, in order to ensure the quality of construction, it is necessary to take effective tools for the transportation of materials, for concrete mixing materials, generally mixed at the construction site, if the concrete is transported over long distances, it will lead to an increase in the water-cement ratio of concrete, and it will also lead to the concrete becoming very thin, which is also the cause of the quality problems in the construction of concrete for housing buildings .

When mixing concrete on site, we also need to master the ratio of coarse and fine aggregates to ensure the thoroughness of flushing and to avoid the strength of concrete not meeting the standard. In some construction units, there are often problems of unreasonable coarse aggregate grading coefficients, the proportion of concrete ingredients is not reasonable enough, and the amount of cement paste is seriously insufficient, which are the reasons for the appearance of honeycomb pockmarked concrete members, and the unreasonable ratio is a major reason for reducing the strength of the concrete structure, which is also the main reason for the quality problems of housing construction projects, and needs to be paid attention to.

　　1.2 Problems of concrete construction process

　　Concrete construction process includes formwork engineering, concrete pouring and pounding, concrete demoulding and maintenance, etc. In formwork engineering, it is necessary to choose suitable formwork and then choose the best installation method, but in many building construction units there is no detailed plan for formwork installation and dismantling, and no detailed instructions are given for these processes.

During on-site construction, the formwork should be made and assembled well, but in practice, the construction personnel cannot make and assemble them very precisely, so the formwork often has deformation, open joints and other problems, which leads to deformation, pockmarking or honeycomb of some concrete members, so the construction unit must ensure that the concrete members meet the requirements of strength performance and avoid the deformation problems caused by poor construction process and damage problems.

　　When mixing concrete, the mixing time will also affect its quality, if the mixing time is not enough, it will lead to the failure of the cement to fully occur the heat of hydration reaction, and some constructors do not follow the requirements of the ingredients, which directly affects the strength of the concrete after molding, concrete pouring must do a good job of pounding, if the pounding is not dense enough or the pounding bar is not inserted deep enough, will lead to concrete components The concrete must be properly pounded.

When demoulding the concrete after forming, the work must be meticulous, but some construction units start demoulding without reaching the demoulding time and strength in order to catch up with the schedule, which reduces the strength of the concrete components. In the maintenance of concrete, you need to control the temperature and humidity of the surrounding environment, in the colder weather, if you do not do a good job in the maintenance of concrete components, will lead to more cracks in the concrete components. If the concrete members do not meet the strength requirements and heavier objects are placed on the concrete members, it will lead to larger loads on the concrete members in the early stage, thus increasing the probability of cracks.

　　2 Measures for quality control management of concrete construction in housing construction

　　In the housing construction project, the construction unit needs to strengthen the quality control, develop an effective management plan, the necessary constraints on the construction personnel, so as to ensure the quality of the construction of housing buildings, the following author introduces the common quality control management measures one by one.

　　2.1 Control the quality of raw materials

　　In the housing construction project, the construction unit needs to do a good job in the preservation and management of raw materials, in the transport of concrete and other materials, must reduce the transport distance, but also according to the site conditions, the mixing process to adjust the mixing time and control the mixing ratio of ingredients, but also add the right amount of admixtures.

Cement in concrete plays a role in hydration and condensation, the strength and volume stability of concrete has a decisive impact on the selection of suitable cement should be compared with the test, selected on merit. The fineness modulus and mud content of fine aggregates are the index parameters for the assessment of their quality, which has a great impact on the quality of concrete mixing.

Coarse aggregate to consider the rationality of its gradation, to ensure that the selected coarse aggregate gradation continuous, it is necessary to conduct experimental studies. The water used for mixing concrete cannot contain substances that affect the process of hydration reaction of concrete and the strength of concrete, and the water quality needs to be tested before concrete mixing and can only be mixed after passing.

Materials are the basis for controlling the quality of concrete construction. Raw materials should be strictly quality control, for unqualified, expired raw materials are not allowed to enter the construction site. The quality of materials should be tested again during the construction process, and substandard concrete materials should not be used.

　　2.2 Strictly control the technical points of construction

　　Formwork construction structure design should be reasonable, the lower bracket should be both stable and deformation resistance, mold removal should grasp the time of casting concrete forming strength, do not remove the mold too early. The concrete pouring process should be carried out under the premise of clear arrangement of reinforcement in the pouring part, and the pouring method may depend on the situation, and should be changed to the manual inserting brazing method for pounding in the dense part of reinforcement arrangement of the member.

In the pouring process must prevent the occurrence of segregation, pounding concrete should be dense, uniform, moderate, and strictly control the spacing of pounding, pounding must ensure that the surface of the elements out of the pulp, stopping time shall not exceed the initial setting time of cast-in-place concrete, if more than the initial setting time, it must be reserved for construction joints.

Early maintenance of cast-in-place concrete elements must be in place to maintain the appropriate ambient temperature and humidity. In the case of special environment and poor conditions, consider the option of using methods such as covering moisturized concrete elements for maintenance work. According to the reasonable mix ratio construction, firstly, the moisture content of sand and stone should be measured in time, and the design mix ratio should be converted into the construction mix ratio. Secondly, use the weight ratio, not the volume ratio, and finally, check in time whether the raw materials match with the raw materials at design.

　　Conclusion

　　Through the analysis of this paper, it can be seen that there are more problems in the construction of concrete for housing buildings, which can be roughly divided into two aspects of raw materials and construction techniques. In order to improve the quality of construction, construction units need to understand the reasons for the appearance of common quality problems, so as to develop effective management measures to reduce the probability of quality problems.

Concrete is a common construction material for building projects, it is a mixed material, first of all, you need to do a good job in the proportion of raw materials, but also optimize the construction process to ensure that the strength of concrete components up to standard. The rationality of the concrete construction process has a direct impact on the construction quality of the whole project, if there are safety hazards in the construction, it will threaten the life and property safety of the owner, and will also have a negative impact on the reputation of the construction unit again.

Therefore, the relevant building construction units must pay attention to the mastery of concrete construction technology, and constantly summarize and analyze in order to improve their own capabilities, so as to promote the overall development and progress of the construction industry.

Pocket doors also are a sleek choice for offices wherever space is at a premium. As an additional bonus, most glass cubicle systems are demountable, which means that they will be removed or reconfigured while not disbursement surplus time and cash undergoing pricey remodels. All of those choices enable every office to customise its style to its specific wants. there’s nothing quite like coming into an office that’s tailored to its specific needs and customised to perfection. They produce an area that is open and encourages collaboration whereas still granting non-public spaces.

They mix beauty, efficiency, and practicality to deliver wonderful results. Glass cubicles with doors will embody wood doors for added privacy or a range of alternative door choices. Door options include barn doors for a contemporary house bit and straightforward access. motor-assisted shut or automatic doors are low maintenance and make a convenient entry and exit from the cubicle.

The doors slide terribly swimmingly and are super straightforward to regulate for plumb…a clever system. The packaging was abundant appreciated, and did an excellent job protective them from harm as we have a tendency to stirred them into jobsite. Further, our cubicles go with the potential to incorporate accessories similar to the following. Custom WordPress Design, Development & Digital promoting by time4design. additionally to those end options, this configuration could also be offered within the stock and fast Ship, program finishes.

These atmospheres don’t happen by accident, they’re purposely designed by selecting elements that complement each the sensible and aesthetic wants of the corporate and its employees. fashionable workplace is understood for giving an outsized choice of quality business article of furniture from over a hundred makers at discount prices—not simply the restricted colours or sizes you’ll see elsewhere. Shipping is free whether or not you’re in New England, the Midwest, the Pacific Northwest, the South, or anyplace within the contiguous forty eight states.

Makers like herb stylecall center cubiclesespecially with daily centre operations in mind. fashionable decision center office cubicles boost productivity, create it easier for your team to target calls easier and match cables from computers and phones discreetly out of sight. Open workplaces are rising in popularity, because of their ability to market communication and foster relationships between team members. However, a totally open space can considerably distract staff from obtaining their work done. With the Sunline slippery cubicle table system, you’ll be able to encourage collaboration at some times and freelance work on others. Our extremely customizable open office cubicles allow you to assemble to your heart’s content.

These workstations are usually L or U formed and put in in teams of four or six desks. offer your workspace’s practicality a lift by incorporating modern office partitions into your office block or reworking project. investigate our up to date interior glass partition styles for co-working spaces, company offices, healthcare, lifestyle, education, fitness, retail outfits, public buildings, hospitality, and more.

Job work style is functioning exhausting during this current scenario and has design merchandise to stay your workers safe from crowded public areas and provides extra virus protection. I had alittle half that was cracked and that they sent Maine a pair of replacements the terribly next day. everybody who sees the doors and every one the contractors concerned in my room renovation say they need ne’er seen such stunning doors that glide thus smoothly. we’ve multiple programs that betting on your end requirements, can ship in three to seven days. Our skilled designers can produce the best area arrange for your space at no charge.