摘要
采用压汞测孔仪(MIP)、扫描电镜(SEM)和X射线衍射(XRD)等测试技术,研究了石灰石粉对复合胶凝材料水化特性的影响.结果表明:与掺入粉煤灰相比,掺入石灰石粉也可减少复合胶凝材料的需水量,同时使胶砂强度有所降低,但其对胶砂后期强度的影响会逐步减小;石灰石粉和粉煤灰均能降低复合胶凝材料的水化热;石灰石粉对胶砂孔结构具有显著改善作用,能细化砂浆孔隙;随着龄期的延长,石灰石粉和粉煤灰都会发生水化,石灰石粉后期将水化生成水化碳铝酸钙.
The influence of limestone powder on the hydration characteristic of complex binder was studied by using mercury intrusion porosimetry（MIP）,scanning electron microscopy（SEM） and X-ray diffraction（XRD） techniques.Testing results show that similar to fly ash,limestone powder will decrease the water requirement of complex binder.The strength of mortar will be decreased on the addition of limestone,however,the effect of decrease will become less at later period.Limestone powder and fly ash will also decrease the hydration heat of complex binder;on the other hand,limestone powder can improve the pore structure of mortar and makes the pores finer.Limestone powder and fly ash themselves will be hydrated at later period,the hydration products of limestone are calcium monocarboaluminate hydrates.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2010年第2期218-221,242,共5页
Journal of Building Materials
基金
高等学校博士学科点专项科研基金资助项目(200804861060)
中建股份科技研发课题(CSCEC-2009-Z-19)
关键词
石灰石粉
复合胶凝材料
水化特性
粉煤灰
limestone powder
complex binder
hydration characteristic
fly ash
