摘要
基于渡槽混凝土病害严重、耐老化性能差等问题,采用萘系和聚羧酸盐两种高效减水剂,根据不同水胶比、粉煤灰掺量、粉煤灰矿粉复掺配制出C50渡槽高性能混凝土,并测试混凝土的抗氯离子扩散系数、抗冻性和抗碳化性能等耐久性指标,分析水胶比、粉煤灰掺量、粉煤灰矿粉复掺对其耐久性的影响。结果显示:随着粉煤灰掺量增加,混凝土的抗氯离子渗透性能有所提高,但抗冻性能和抗碳化性能均呈下降趋势;粉煤灰矿粉复掺提高了混凝土的抗氯离子渗透性能和抗碳化性能,抗冻性略有降低。
Based on the problem of disease serious, resistance to ageing bad of the aqueduct concrete, it has been studied that the effect of water to binder ratio, fly ash（FA）, fly ash and granulated blast- furnace slag（GBFS） mixed, optimized mix proportions of C50 aqueduct high porformance concrete was achieved by adopting the high efficiency water reducing agent of naphthalene and polycarboxylate, moreover, the resistance to chloride ion diffusion coefficient, frost and carbonization were tested, the effect on the durability of water to binder ratio, FA as well as GBFS was analysed. The result shows： as the mixing amount of FA increases, resistance to chlorine ion permeability of concrete improves to some extent, but the resistance to frost and carbonization present the downward trend; the FA and GBFS mixed has improved the resistance to chlorine ion permeability and resistance to carbonization performance of concrete, resistance to frost was reduced slightly.
出处
《粉煤灰综合利用》
CAS
2010年第2期7-10,共4页
Fly Ash Comprehensive Utilization
基金
国家科技支撑计划项目:(编号2006BAB04A05)
关键词
渡槽高性能混凝土
氯离子渗透性
抗冻性
碳化.
aqueduct high-performance concrete
chloride ion permeability
frost-thaw resistance
carbonization
