不同石灰石粉掺量对硅酸盐水泥水化的影响

Effect of Limestone Aggregate Micro Fines with Different Contents on Hydration of Portland Cement

采用外掺的方式,在石灰石粉占水泥质量比例的0%、3%、6%、9%、12%时,对比研究了石灰石粉对硅酸盐水泥水化的影响规律。通过分析XRD、拉曼光谱、XRD定量分析的试验结果,得出在7 d时,随着石灰石粉掺量的增加,AFm相逐渐减少,石粉掺量大于9%时,AFm相已不再生成,在28 d时,掺有石粉的水泥水化产物中,AFm相均消失。在28 d时,在掺有石粉的水泥水化产物中,随着石粉掺量的增加,水化产物中Ca(OH)2的生成量逐渐增加,但石粉掺量不大于6%时,Ca(OH)2生成量低于空白样的。在180 d时,随着石粉掺量增加,水化产物中Ca(OH)2的生成量,则是随着石粉掺量的增加而增加,且其生成量均大于空白样的。

Portland cement was mixed with limestone aggregate micro fines（ AMF） by weight at the percentage of 0%,3%,6%,9%,and 12% with extra-mixing method,and the influence regularities of limestone AMF on the hydration of portland cement were comparatively studied. It can be concluded through analyzing the experimental results of XRD,Roman spectrum,and XRD quantitative analysis that at 7 d,AFm phase gradually decreases as the amount of limestone AMF increases,and there is not AFm phase when the percentage of AMF is greater than 9%,at 28 d,there are not AFm phase in the hydration products of Portland cement with limestone AMF. At 28 d,the amount of Ca（ OH）2in hydration productions with limestone AMF gradually increases as the percentage of AMF increases,and it is less than that in control sample; at 180 d,the amount of Ca（ OH）2in hydration productions increases with the increment of the AMF,and they are all greater than that in control sample.