部标准 JC315—82《蒸压加气砼砌块》规定,500级加气砼立方体抗压强度≥27kgf/cm~2。目前国内粉煤灰加气砼厂生产的产品,其强度一般可以达到27kgf/cm~2,但是很难突破30kgf/cm~2。同时容重偏大,破损率较高,浇注合格率偏低,干燥收缩值降不下来。这些已成为推广应用加气砼的障碍。提高粉煤灰加气砼强度的途径是多方面的。一年多来,我们在武汉市硅酸盐制品厂的 Ministry of Standards JC315-82 “Autoclaved Aerated Concrete Blocks” stipulates that a 500-gauge aerated concrete cube has a compressive strength of ≥27kgf/cm~2. At present, the strength of products produced by domestic fly ash aerated concrete plants can reach 27kgf/cm~2, but it is difficult to break through 30kgf/cm~2. At the same time, the bulk density is too large, the breakage rate is high, the casting qualification rate is low, and the drying shrinkage value does not fall. These have become obstacles to promoting the use of agitation. There are many ways to increase the strength of fly ash aerated concrete. For more than a year, we are in the silicate product factory in Wuhan