粉煤灰在水泥浆体中的反应程度研究

Reaction Degree of Fly Ash in the Cement Paste

本文研究了粉煤灰在水泥浆体中的反应程度,并对粉煤灰的反应程度与水泥龄期、粉煤灰掺量、比表面积等因素进行了拟合,结果表明,粉煤灰在水泥中的反应程度随掺量的增加而降低,随比表面积增加而升高;粉煤灰前7d的反应程度增长较为缓慢,但28 d后,粉煤灰的反应程度增加较为迅速,90 d时仍没有变缓的趋势;粉煤灰反应程度与其比表面积、掺量、水泥龄期之间近似呈现幂函数关系。

Fly ash is an important part of the high-performance concrete as a supplementary cementious material. In this article the reaction degree of fly ash in the cement paste is investigated, and the relationships of the reaction degree of fly ash among the cement age, the specific surface area of fly ash, and other factors affected were proposed. The results showed that the reaction degree of fly ash in cement decreases with the increase of the content and the decrease of the specific surface area; The reaction degree of fly ash increase slowly before 7 d, while increases linearly after 28 d, no trend of slowing is observed after 90 d,the relationship between the reaction degree of fly ash and its specific surface area, content in the cement, the cement curing age is approximately consistent with a power function relationship.