摘要
本文研究了用不同细度的磨细石灰石粉作掺合料配制高强混凝土时,石粉对混凝土性能的影响。试验表明,当石灰石粉足够细并且掺量适当时,可以产生微晶核效应,促进水泥的水化,同时在混凝土的水泥产物中形成大量的AFt,与C-S-H凝胶交织在一起,对提高混凝土强度和改善混凝土脆性起到显著作用。超磨细石灰石粉通过分散效应和微集料效应等,对混凝土具有增塑、保塑和减水的作用。
The paper researches performance of high strength concrete containing limestone powder.When fineness or additive amount of limestone powder is different the effect of limestone powder to concrete is different.If the limestone powder is fine enough and additive amount is appropriate,the ultrafine limestone can accelerate hydration of cement and generate a great quantity of AFt in cement stone.AFt improve mechanical performance and reduce brittleness of concrete crisscrossing with C-S-H colloid.Furthermore,superfine limestone powder contribute to plasticization of concrete through dispersion effect and aggregate effect of micro-powder.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2010年第6期1303-1307,共5页
Bulletin of the Chinese Ceramic Society
关键词
超细石灰石粉
高强混凝土
促进水化
改善脆性
AFt
ultrafine limestone powder
high strength concrete
accelerate hydration
ameliorate brittleness
AFt
