普通烧制稻壳灰对水泥胶砂强度的影响

Influence of Common Rice Husk Ash on Cement Mortar Strength

通过等量替代法,研究了普通烧制稻壳灰等量替代水泥后对水泥胶砂强度的影响。结果表明,普通烧制稻壳灰替代率为2%时,试件28 d抗折强度和抗压强度均高于空白胶砂试件,表明掺入少量的稻壳灰有一定的增强作用;稻壳灰替代率为4%时,对胶砂试件的强度影响不明显;稻壳灰替代率>8%时,胶砂强度降低幅度较大。将普通烧制稻壳灰以低替代率应用于水泥混凝土中是可行的。

Experiments were carded out to investigate the influence of common rice husk ash on mortar strength by replacing cement of the same weight. The result shows that when the substitution rate of common rice husk ash is 2%, both the 28 d breaking strength and compressive strength of test specimen exceeds that of blank mortar, which shows that adding a little rice husk ash has some potentiating effect. There is no obvious influence on the strength of mortar specimens when replacing rate of rice husk ash is lower than 4%. However, the reduction of mortar strength will become more when the replacing rate is higher than 8%. So it is feasible to apply rice husk ash to concrete in low substitution rate.