大掺量粉煤灰及矿粉对高性能混凝土性能的影响  

Effects on the properties of HPC with high volume fly ash and mineral powder

作　　者：王喆 夏凯 熊传胜[2] 

机构地区：[1]中交一航局第一工程有限公司第七项目部,浙江宁波315812 [2]河海大学力学与材料学院,江苏南京210098

出　　处：《中国包装科技博览（混凝土技术）》2012年第10期5-9,共5页China Science and Technology Review

摘　　要：高性能混凝土在近几年来得到了人们的普遍关注，关于大掺量粉煤灰及矿粉对高性能混凝土各项性能的影响还不是很多。本文在大榭第二大桥高性能混凝土对各组成材料的特殊要求的基础上，通过双掺大掺量的粉煤灰和矿粉，研究了其掺量对高性能混凝土的抗压强度和抗氯离子渗透性的影响。结果表明：随水灰比增大，混凝土强度降低，氯离子渗透性增强；随着粉煤灰和矿粉的掺量增加，混凝土7天强度降低，而28天强度影响不大，混凝土抗氯离子渗透性增强。I n recent years, people pay more and more attentions on I-IPC, but there are few studies of effects on the properties of HPC with high volume fly ash and mineral powders. Based on the special requirements of materials used in the HPC of the second bridge of Daxie, the effects of the volume on the compressive strength and the resistance to chloride ion permeability of HPC were researched by double-mixing high volume fly ash and mineral powder. The results showed that ： When the water cement ratio increased, the strength of the concrete decreased and the resistance to chloride ion permeability enhanced. The 7 day strength decreased and the the resistance to chloride ion permeability enhanced along with the volume increase of fly ash and mineral powder, but it had little effect to 28 day strength.

关 键 词：高性能混凝土 大掺量粉煤灰 矿粉 耐久性 

分 类 号：TU528.042[建筑科学—建筑技术科学]