摘要
用量热仪、联合热分析仪、扫描电镜分析了稻壳灰(20%及40%质量分数)对铝酸盐水泥水化进程(水化放热、水化程度等)的影响机制。结果表明:稻壳灰掺量为20%时,所得浆体28 d龄期内(1、3、14、28 d)的抗压强度均高于其他样品;稻壳灰自身虽基本无水化活性,但40%质量分数以内替代铝酸盐水泥,均在不同程度上加速了1 d内的水化放热,且可以显著提高铝酸盐水泥的水化程度,20%的掺量便使铝酸盐水泥3 d龄期的水化程度提高了约20%。
The influence of rice husk ash (RHA, 20% and 40%, mass fraction) on the early hydration (hydration heat, hydration degree) of calcium aluminate cement was investigated by calorimetry, differential thermal-thermogravimetry and scanning electron microscopy, respectively. The results indicate that compared to other samples, the substitution of 20% RHA contributes to the maximum compressive strength within 28 d (1, 3, 14, 28 d). The addition of RHA accelerates the hydration evolution of calcium aluminate cement within 1 d, and improves the hydration degree of cement clinker. The substitution of 20% RHA results in an improvement of around 20% in hydration degree of calcium aluminate cement after 3 d.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2016年第8期1098-1103,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51402216)
高性能土木工程材料国家重点实验室开放基金
先进土木工程材料教育部重点实验室(同济大学)开放基金
关键词
稻壳灰
铝酸盐水泥
水化
rice husk ash
calcium aluminate cement
hydration
microstructure
acceleration effect