Research Of Steam Pressure Aerated Concrete Frost Resistance

With the implementation of the national strategy of sustainable development, combined with the "energy saving, section land, water conservation, waste recycling requirements of gr een wall materials will replace the traditional wall materials. Steam pressure aerated concrete has the advantages of light weight, heat preservation heat insulation performance is good, an d consumes large amounts of waste fly ash, has become China's main filling wall material of.The filling wall is of high demand for the durability of block material.. At present, the res earch on the durability of the vapor pressure aerated concrete, especially the frost resistance,is very little.. In order to further improve the study on autoclaved aerated concrete frost resist ance. In this paper, a series of experiments and theoretical analysis, the promotion and applic ation of green energy-saving materials with significant.Research and analysis show that the pore structure of the material and its physical and m echanical properties is the main factors affected the freezing tolerance, and capillary water a bsorption coefficient can reflect the pore structure of the basic situation. This paper in the res earch of aerated concrete absorbent material properties and pore structure of cited the basic p rinciple of water uptake kinetics, and the water absorption tests of four groups of 24 specime ns obtained after water curve diagram summarizes the relationship between pore structure an d capillary water absorption coefficient.In the impact of aerated concrete pore structure of frost resistance, aerated concrete pore according to different aperture against different into harmful pore and harmless pore properti es of frozen. Through the division standard calculated different time period of capillary wate r absorption of aperture, and further to determine the effect of aerated concrete frost resistanc e. The main function of the capillary water absorption coefficient.Based on four different materials subjected to freeze-thaw cycle test, the capillary water absorption coefficient and pore strength as the main parameter to characterize the frost resist ance. At the same time, based on the method proposed aerated concrete frost resistance index,and according to the requirements of different regions the frost resistance grade, different re gions of antifreeze indexes and strength limit value.