Method for testing air permeability of surfactant for aerated concrete building blocks
A kind of technology of air-entrained concrete and testing method, which is applied in the direction of measuring device, permeability/surface area analysis, weighing by removing certain components, etc. It can solve the problems of no testing method and difficulty in forming test pieces, and the method is simple and easy Easy to operate and effective
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[0029] 1. Test raw material
[0030] PTB emulsion (a terpolymer composed of vinyl chloride, ethylene, and vinyl ester produced by Polytechnisch Bedrijf Bvba / Sprl in Belgium), P.O42.5 cement (Lianshi brand), Minjiang river sand (fine sand) , methyl cellulose ether (produced by Fuzhou Sifang Chemical Co., Ltd.)
[0031] 2. Air-entrained concrete block interface agent mix ratio
[0032] The mix proportions of three kinds of air-entrained concrete block interface agents are shown in Table 1.
[0033] Table 1 Mixing ratio of three interface agents
[0034]
[0035] According to Table 1, three interface agents for air-entrained concrete blocks were prepared.
[0036] 3. Test piece production
[0037] Cut the aerated concrete blocks into test blocks with specifications of 180mm×180mm×150mm (total surface area A=0.18m×0.18m×2+0.18m×0.15m×4=0.1728m 2 ) for standby, put the cut test block into the water tank, the depth of tap water in the water tank must be greater than 180mm...
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