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What is the code for check and acceptance of reinforced concrete project ?
- Article 2.1.1 Materials of the template and holder shall be steel, wood or new materials. The steel should be consistent with the No. 3 steel standard in the "Ordinary carbon steel grades and general technical conditions" (GB700-79). The timber should be consistent with the selection criterion of bearing structures under Code for construction quality acceptance of timber (GBJ206-83) , the tree species can be selected according to regional conditions, and the material grade shall not be under Ⅲ grade. Article 2.1.2 The template and holder must be in accordance with the following provisions: First,ensure the shape, size and position of engineering structures and components in each part is correct. Second, have enough strength, rigidity and stability, to withstand the weight and lateral pressure of newly poured concrete, as well as load generated in the process of construction.Third, simple structure, convenient assembly and disassembly, convenient for reinforcing bar colligation and installation and concrete pouring and curing process. Fourth, tight template joints without spillage. Article 2.1.3 The design, fabrication and construction of composite steel template, large formwork, climbing form and so on shall be in conformity with the relevant professional standards. Article 2.1.4 The contact surface of template and concrete shall be coated with separant. Do not use separant which will hinder the construction of decoration project. Article 2.1.5 The templates and holders shall be properly maintained, and the steel formwork and steel supports shall be prevented from corrosion.s
The physical properties of HDPE geomembrane
- It has the following physical properties: ① excellent chemical resistance (corrosion resistance); ② outstanding resistance to stress cracking (ESCR); ③ the lowest permeability; ④ excellent UV resistance; ⑤ stable resistance to low temperature embrittlement;s
What is the hardness of HDPE board? What kind of knife is used to cut?
- DPE board (high density polyethylene sheet) melting point is about 130 ℃. It has good mechanical strength. It has good heat resistance and cold resistance, good environmental stress crack resistance. It is advised that the range of melting temperature is 200-250℃. The melting temperature is 220℃-260℃. The relative density is 0. For materials with larger molecules, 941-0, it has higher rigidity and toughness and good chemical stability. It can use carbide cutter tool or diamond cutter to cut. Dielectric properties. Hardness is about 30-45HRC.s
What are the differences between seepage-proof geomembrane and impermeable geomembrane?
- Just different names, products are the same.s
whether it needs to use the soil to level the ground when paving the solid wood floor?
- it needn't level it because it does not require to build keel when paving the solid wood floor, and the keel can be leveled.s
Is there the parameters of three-dimensional geotechnical drainage board?
- Width: The thickness is 4m: 2mm~8mm 1. When the load is 720kPa, the gradient is 2%, the permeability is 2500m / d, and the flow rate is 13 pm/m. 2. In the bear 1200kPa load creep test after 10,000 hours,it retains more than 60% of the thickness. Three-dimensional three-dimensional drainage network drainage network 3, three ribs water network core carbon black content of not less than 2%, the density of 0.94g / cm3, tensile strength of not less than 36.5kN / m, a melt index of 1.0 g / 10min, a thickness of 7.6mm. 4. The apparent aperture of the non-woven geotextile is about 0.18mm, the water permeability is 0.26 Sec-1, the permeability 0.2cm / sec, the puncture strength 580N, the trapezoidal tear strength of 356 N, holding the tensile strength of 900 N, extended grip strength 50% of the burst strength 2750kPa.s
How to choose the glass stick membrane Sunscreen film?
- How to choose the glass stick membrane Sunscreen film: 1. From the abrasion resistance, it can be divided into low abrasion resistant coating layer, wear-resistant layer and not wear-resisting film. So after we get a piece of architectural membrane, the first is to distinguish its protective layer, and then rub it on the wear-resistant layer to see if it will produce pattern. If there is the decorative pattern, it is the low level; If there isn't the decorative pattern, it is the middle or high level film. 2. To see whether there is electrostatic attraction, due to the low membrane uses a little metal materials. So when it is being rubbed, it will slide from left to right; but to the high-end film, it has a kind of electrostatic attraction due to it with a lot of metal materials, and it is not sliding when rubbing. 3. The first is to see whether the plating layer is uniform, pick up a piece of building film to see whether it is uniform. If it is even, it is the good quality film. If it is uneven, it is the low quality film. 4. According to the analysis, because the heat insulation effect of different grades of film solar is not the same, so we adopt the high power lamp (500W--700W) to irradiate on the surface of the membrane. If the insulation effect of the low-grade membrane is poor, the hot will be felt even across the film. But for the high-end film, there is hardly any calorie that can penetrate it, so the hot will not be felt across the membrane. 5. The carburetor cleaning agent test method is to make the floor friction or the oil cleaning agent with a piece of film (also known as "cleaning agent") spray on the membrane. The fading inferior film is usually said tinted film. The film not fading is the high-end film, also known as the film of primary color. In summary, the building film with high transmittance and high thermal insulation is the high-grade film.s
how to construct the green revetment black geomembrane
- first dig the slope which need to be constructed well and cleaned well, laying geomembrane, on the geomembrane installed Renault pad mounted stone, and complete the construction by sealing.s
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