石灰石粉复掺低品质粉煤灰在混凝土中的作用机理研究  

Study on the action mechanism of limestone powder and substandard fly ash combined admixture in concrete

作　　者：徐国强[1,2] 唐伟[1] 张薇[1] 

机构地区：[1]河北联合大学建筑工程学院,河北唐山063009 [2]河北省地震工程研究中心,河北唐山063009

出　　处：《混凝土》2015年第1期79-82,共4页Concrete

基　　金：国家自然科学基金项目(51278164);河北省科技支撑计划项目(13273809);河北省高等学校科学技术研究项目(ZD2014021);河北省大学生创新创业训练计划项目(201310081041)

摘　　要：对石灰石粉复掺低品质粉煤灰在混凝土中的作用机理进行研究。结果表明,石灰石粉和低品质粉煤灰的掺入改善了粉体材料的粒度分布,提高了颗粒堆积密度。石灰石粉复掺低品质粉煤灰在混凝土中的作用机理包括填充效应、加速效应和活性效应,石灰石与低品质粉煤灰在发挥各自效应的基础上,产生了"超叠加效应",克服了单掺石灰石粉或低品质粉煤灰存在的缺陷和负面效应。It is research on the mechanism of action of limestone powder admixture with low -quality fly ash in concrete.The experiment results indicate that mixed material of the limestone powder and low - quality fly ash can be improve the particle size distribution and the particles accumulate density.Three kinds of reflection will happen in the mixed materials with the limestone powder and the low - quality fly ash,including filling effect, acceleration effect and active effect. It produced ＂ super stack effect＂ base on their respective foundation effect of the limestone powder and low - quality fly ash, which overcomes the shortcoming and negative effect of the materials that is the single ingredient with limestone powder or the low - quality fly ash.

关 键 词：石灰石粉 低品质粉煤灰 填充效应 加速效应 活性效应 

分 类 号：TU528.041[建筑科学—建筑技术科学]