摘要
为分析粉煤灰掺量与混凝土抗渗性能之间的关系,文中开展了粉煤灰掺量及养护龄期对混凝土抗压强度、孔隙率、渗水高度、渗水压力以及氯离子渗透系数的影响研究.结果表明,混凝土早期抗压强度、渗水高度及抗氯离子渗透系数随着粉煤灰掺量的增加而降低,渗水压力及孔隙率随着粉煤灰掺量的增加而降低.当粉煤灰掺量为25%时,混凝土抗压强度、孔隙率、渗水压力、渗水高度及抗氯离子渗透系数均达到最佳.所有类型混凝土抗压强度、孔隙率、渗水压力、渗水高度及抗氯离子渗透系数均随着养护龄期的增加而增强,早期性能的变化速率远远超过后期性能的变化速率.
Abstract
In order to analyze the correlation between fly ash content and concrete impermeability,the influences of fly ash content and curing age on compressive strength,porosity,seepage height,seepage pressure and chloride ion permeability coefficient of concrete were studied.The results show that the early compressive strength,water seepage height and chloride ion permeability coefficient of concrete decrease with the increase of fly ash content,and the water seepage pressure and porosity decrease with the increase of fly ash content.When the fly ash content is 25%,the compressive strength,porosity,seepage pressure,seepage height and chloride ion permeability coefficient of concrete are the best.For all types of concrete,the compressive strength,porosity,seepage pressure,seepage height and chloride ion permeability coefficient increase with the increase of curing age,and the change rate of the early performance is much higher than that of the late performance.
国家科技期刊平台
NSTL
万方数据