摘要
分别采用两种不同试验方法对比研究了单掺粉煤灰、硅灰和矿渣微粉这三种常用的矿物外加剂(即水泥混合材)对水泥浆体早期自收缩的影响。研究结果表明,单掺粉煤灰、硅灰和矿渣微粉后,硬化水泥浆体的自收缩值分别随其掺量的增加而减小、增大和增大。本文分析研究了这三种常用的矿物外加剂对硬化水泥浆体自收缩产生影响的原因,并对比分析了本试验采用的两种试验方法,发现波纹管法更能准确地测量水泥浆体的早期自收缩,参照现行行业标准JC/T313-1982测试无法正确地反映硬化水泥浆体更早期的收缩现象。
By means of two different test methods to study the effect of fly ash,silica fume and GGBS on the early age autogenous shrinkage of cement paste respectively.The results showed that the autogenous shrinkage value of hardened cement paste would be decreased with the fly ash content increased,but increased with the silica fume and GGBS content increased.These phenomena was discussed.Two testing methods were also compared.Bellows testing method could measure the early autogenous shrinkage of cement paste more accurately,but JC/T 313-1982 testing method couldn＇t.
出处
《水泥》
CAS
北大核心
2010年第6期1-4,共4页
Cement
基金
国家西部交通建设科技项目(200731822301-7(3))
关键词
矿物外加剂
粉煤灰
硅灰
矿渣微粉
硬化水泥浆体
早期自收缩
mineral admixture
fly ash
silica fume
GGBS
hardened cement paste
early autogenous shrinkage
