摘要
用电导率法研究了分别掺加粉煤灰、磨细矿渣、硅粉等矿物掺合料混凝土的氯离子渗透性与水化时间的关系,发现在180d养护时间内混凝土的电导与时间经拟合为幂函数关系,且矿物掺合料混凝土电导对养护时间更敏感;混凝土中掺加矿物掺合料可以显著降低混凝土的导电能力;水胶比对混凝土渗透性有较大影响,水胶比越大,混凝土抵抗氯离子渗透的能力越低。
An electrical conductivity method is employed to estimate the temporal dependence of the chloride permeability of blended concretes （fly ash, ground granulated blast-furnace slag, silica fume）. The results show that a power law function is suited to describe the relationship between conductance and time after 180 days＇ curing, and the function parameters are mathematically fitted. Mineral admixtures can remarkably improve the concrete electrical resistance. The water to binder ratio （W/B） has also great influence on the concrete resistance to chloride penetration, the higher the W/B, the lower permeability of the concrete to chloride.
出处
《工业建筑》
CSCD
北大核心
2006年第12期9-11,8,共4页
Industrial Construction
基金
河北科技大学校立科研基金资助项目(编号:XL2005003)
关键词
掺合料混凝土
氯离子
电导
渗透养护时间
blended concrete chloride conductance permeability curing time
