熟料粒度分布与矿物组成对硅酸盐水泥抗裂性的影响  

Influence of clinker particle size distribution and mineral composition on cracking resistance of Portland cement

作　　者：邓青山 李书明 谢永江 刘竞 胡家林 DENG Qingshan(Institute of Railway Construction,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [2]中国铁道科学研究院集团有限公司高速铁路轨道系统全国重点实验室,北京100081

出　　处：《水泥》2023年第10期1-7,共7页Cement

基　　金：中国铁道科学研究院集团有限公司基金(2021YJ015)。

摘　　要：为系统探究熟料粒度分布和矿物组成对硅酸盐水泥抗裂性的影响,研究了熟料粒度分布和矿物组成对水泥基材料工作性能、水化性能、力学性能、干燥收缩性能和抗裂性能的影响。结果表明:随着水泥熟料细颗粒含量的提高,水泥标准稠度用水量增大,凝结时间缩短,失水率减少,干燥收缩增大,开裂风险增大;随着水泥熟料中C3S含量的减少,C2S含量的增加,水泥标准稠度用水量变化不明显,凝结时间延长,早期水化活性和强度降低,后期强度能稳定增长,失水率增大,干燥收缩减小;制备抗裂硅酸盐水泥时,建议水泥熟料粒度分布特征粒径D10控制在5~7µm之间,D90在45µm左右,C3S含量在40%~60%,C2S含量在10%~30%。In order to explore the influence of clinker particle size distribution and mineral composition on the cracking resistance of Portland cement,the effects of clinker particle size distribution and mineral composition on the working performance,hydration performance,mechanical property,drying shrinkage and cracking resistance performance of cement�based materials were explored systematically.The results showed that with the increase of fine powder content of cement clinker,the water requirement of normal consistency of cement increased,the setting time shortened,water loss ratio was decreased,dry shrinkage and the crack risk of cement increased.With the decrease of C3S content and the increase of C2S content in the cement clinker,the water requirement of normal consistency of cement had no significant changes,the setting time was lengthened,the early hydration active and strength were reduced,later strength could improve steadily,the water loss ratio was increased and dry shrinkage was decreased.Finally,it is suggested that when manufacturing crack resistance Portland cement,the D10 of clinker was best to be controlled 5~7μm,the D90 was suitable to 45μm approximately,C3S and C2S content of clinker were satisfactory to be controlled 40%~60%and 10%~30%,respectively.

关 键 词：硅酸盐水泥熟料 粒度分布 矿物组成 抗裂性能 

分 类 号：TQ172.1[化学工程—水泥工业]