Problem 2: It is not easy to apply granular protective layer. The most economical and practical protective layer is pea stone waterproof granular layer. The method after waterproofing is to apply a layer of waterproofing membrane glue at last, and then spread the screened and cleaned pea stones evenly on the surface and scrape them flat with tools (if there are too many pumice stones, spray some waterproofing membrane glue).
Question 3: What materials can be used for the protective layer of the roof particle coating, and the base layer can handle products such as putty powder.
Question 4: What is the quota for coating the protective layer of granular materials? First, the quota method:
Firstly, according to the construction drawing of the unit project, calculate the quantities of sub-projects included in the project list of each division;
Then the included Buddhism is grouped (quota can be set), adjusted according to labor, materials and machinery, and charged to form the comprehensive unit price of Buddhism. The comprehensive unit price is obtained by multiplying the engineering quantity of each subtitle group price item by its comprehensive unit price, and the sum of the comprehensive unit price of each subtitle becomes the comprehensive unit price of the list, which is obtained by dividing it by the engineering quantity of the list.
Then multiply the bill of quantities of each subproject with its corresponding comprehensive unit price, and the product is the total cost required for each subproject;
Many a mickle makes a mickle. To sum up, you can get all the itemized project costs of each unit project. This compilation method is suitable for the needs of market economy when the prices of labor and materials change at different times and places.
Second, the quota matters needing attention:
(1) Description based on project characteristics. When the description of the project features in the list is inconsistent with the design drawings, the comprehensive unit price of the tender offer shall be subject to the description of the project features in the list. By the time of construction, the employer and the contractor will re-determine the comprehensive unit price according to the characteristics of the actual construction project and the contract. (2) Disposal of temporary material valuation. The tender documents provide estimated materials in other project lists, which are included in the comprehensive unit price according to their estimated unit price.
Question 5: How to make a protective layer of coating particles on the self-adhesive waterproofing membrane? What is the construction technology? What exactly are paint particles? Thank you very much if it helps. 1, waterproof specification, waterproof engineering, no so-called "paint particles".
2. Self-adhesive coiled materials generally cannot be exposed for use, but they can be protected by mortar and stone-fed concrete with rigid layer. You can also brush asphalt or waterproof coating on the coil and sprinkle coarse sand or pisolite before the coating is dry, but this is costly and ineffective.
Question 6: What is the protective layer of paint? If there is a topcoat, the topcoat is generally called a protective layer. Topcoat is generally strong in weather resistance and environmental impact resistance, and has a protective effect on the whole coating, including functional layer and primer layer.
Question 7: What coating is used for the particle protection layer on the 7:TPO coil? TPO (thermoplastic polyolefin waterproofing membrane) is a new type of waterproofing membrane, which is made of petroleum resin, ethylene, acetic acid and ethylene resin, antioxidant, antioxidant, softener, fabric fiber and aluminum film attached to the surface. It is a new material popular in the United States and Europe in recent years, and gradually occupies an important position. The physical properties of this material meet the requirements of Polymer Waterproof Materials (GB 18 173-2000). TPO waterproofing membrane combines the performance advantages of EPDM and PVC, and has the weatherability, low tenderness and weldability of the former. This kind of material is different from the traditional plastic, which shows the high elasticity of rubber at room temperature and can be molded like plastic at high temperature. Therefore, the material has good machinability and mechanical properties, and has high weldability. TPO waterproof coiled material welding machine
Question 8: How to react acrylic emulsion with silicone? If the following content is helpful to you, I'm glad. According to the characteristics of low surface energy and low viscosity, silicone polymer is more suitable for practical application and modified in the preparation process. The application of modified silicone resin is wider and better. It has been proved from the development trend. The above is excerpted from "Chapter III silicone Coatings" in "Coating Technology" (Ju Zishan. Chemical industry press. ISBN 7-5025-1434-1/TQ.786): If you can borrow this book, it may be more helpful to you. In order to prepare silicone resin, two or more units are usually used for hydrolysis, and the raw materials are given in the following article. Even if all the monomers are hydrolyzed, the composition of intermediate products and the amount of ring bodies generated after hydrolysis are often very different due to different hydrolysis conditions. The influence of various related factors in the hydrolysis process: 1, the influence of PH value of hydrolysis medium (1) acidic medium; (2) neutral medium; (3) alkaline medium; 2. Influence of water amount in hydrolysis medium: The amount of water used for hydrolysis is lower than that needed for reaction with chlorosilane, forming a step-by-step hydrolysis polycondensation reaction, which limits the formation of ring bodies. Excessive hydrolysis of water is the opposite. 3. Effect of adding solvent in hydrolysis medium. 4. Influence of stirring speed of equipment during hydrolysis. 5. Influence of temperature during hydrolysis; When the hydrolysis temperature is high, the component molecules move violently, and the chance of collision increases, which is beneficial to the growth of polycondensate. When the temperature is low, the situation is just the opposite. Factors related to formulation: This factor is different according to different resin types, including: (1) average degree of substitution of alkyl (D.S.); (2) The average mass% (including SiOx, phenyl and methyl) has a data range after careful research experience of many chemists; Modified resin: It has the advantages of two resins, makes up for the shortcomings of silicone resin, and makes it more suitable for coating applications. Generally, silicone modified organic resins include alkyd resin, polyester resin, epoxy resin, acrylic resin, polyurethane resin and phenolic resin. Two modification methods: cold spell (physical method); Chemical law; Research Progress of silicone Coatings silicone is the first element organic polymer compound that has been widely used. Because of its unique chemical structure, it has excellent properties and is widely used in various fields of national economy, and also occupies a very important position in the coating industry. Silicone coating is a coating with silicone polymer or silicone modified polymer as the main film-forming substance. It has excellent heat and cold resistance, electrical insulation, corona resistance, radiation resistance, moisture resistance, water resistance, weather resistance, pollution resistance and chemical corrosion resistance. In recent years, the improvement and application of product performance have developed rapidly. The coatings made of silicone resin mainly include heat-resistant and weather-resistant silicone anticorrosive coatings, scratch-resistant transparent silicone coatings, demoulding and moisture-proof coatings, and radiation-resistant coatings. Silicone resin is generally prepared by hydrolytic polycondensation of methyl trichlorosilane (CH3 SiCl3), dimethyl dichlorosilane [(CH3)2SiCl2], phenyl trichlorosilane (C6H5SiCL3 _ 3), diphenyl dichlorosilane [(C6H5) 2Sicl2] and methyl phenyl dichlorosilane [[[〔CHO(C6H5) SiCl2 _ 2]]]. The monomer structure, the number and proportion of functional groups have great influence on the coating properties. The types of organic groups attached to silicon atoms also affect the properties of the resin. Different organic groups can make silicone resin show different properties. When phenyl is used, it gives the silicone resin oxidation stability and can destroy the crystallinity of the polymer in a certain range. When it is vinyl, it can improve the curing characteristics of silicone resin and bring coupling; When phenyl ethyl is used, the miscibility of silicone resin with organic matter can be improved, and the compatibility with alkyd resin and polyester resin can be increased by introducing groups into the main chain of siloxane. When introducing aromatic subunits such as phenylene, diphenyl ether subunit, biphenyl subunit and silicon-carbon-boron polymer, the radiation resistance is strong, and the temperature resistance can reach 300 ~ 500℃. The thermal stability of silicone polymer with Si-N bond in its main chain is above 400℃. In practical application, different silicone monomers can be selected and different organic groups can be introduced into silicone resin as needed. The viscosity adopted by Chen Guang Chemical Research Institute is 20 ~ 40 MPa? S-hydroxy silicone oil, (CH3)2SiCl2 and methyltriethoxysilane were used as raw materials, and NR/NSI = 1.3 ~ 1.4 and (CH3) 2sic >: >:
Question 9: What is the bubble phenomenon of EPDM coiled material after polyurethane waterproof coating? Polyurethane waterproof coating is not recommended for the surface of EPDM coiled material, and the former belongs to difficult-to-stick material. The surface of this kind of coil with polyurethane coating basically has no adhesion, and bubbles appear, mostly because of the loss of adhesion.
Question 10: What is the cause of foaming of polyurethane waterproof coating? First, it may be the quality of the material itself.
Second, the construction process was not carried out in strict accordance with the requirements. If it is the base of kitchen and bathroom, it may be that the moisture content is too high. After the waterproof layer is finished, the base layer is closed, and the water below forms gas in the process of volatilization, so the waterproof layer bulges and becomes two skins. In this case, the waterproof effect will be very poor.