双掺粉煤灰和石灰粉对混凝土耐久性影响的试验研究  

Study of experiment of influence on durability of concrete mixed with fly ash and lime powder

作　　者：赵多苍[1] 吴相豪[1] 胡聪[1] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海200135

出　　处：《混凝土》2011年第7期50-52,共3页Concrete

基　　金：上海海事大学科研基金项目(20100073);上海海事大学重点学科建设项目(A2010030);上海市本科教育高地建设项目(B210008G)

摘　　要：采用ASTMC 1202法和快速冻融试验法,研究了双掺粉煤灰和石灰粉对混凝土的氯离子渗透能力和冻融性能的影响。结果表明:当粉煤灰掺量恒定为30%时,混凝土抗氯离子渗透能力随着石灰粉掺量的增加逐渐减弱,但影响并不显著,双掺粉煤灰和石灰粉混凝土仍然具有较强的抗氯离子渗透能力;石灰粉等量取代水泥对混凝土抗冻能力的影响并不明显,双掺粉煤灰和石灰粉混凝土的抗冻能力较弱,不宜用于有抗冻要求的地区。The influence of fly ash and lime powder on the chloride ion penetrate and freezing-thawing performance of concrete is investigated by the test of chloride ion rapid electric transport （ASTM C1202） and of accelerated freezing and thawing.The results showed that：when fly ash is a 30% of constant, with limestone powder content increasing, the resistance to chloride ion penetration of concrete is gradually weakening, but the effect is not significant;the concrete mixed with fly ash and lime powder has still a strong ability to resist chloride ion penetration;the effects on resistance to freezing-thawing of concrete is not obvious by lime powder in place of cement;the resistance to freezing-thawing of concrete mixed with fly ash and lime powder is weak, and should not be used for areas where the resistance to freezing-thawing are required.

关 键 词：粉煤灰 石灰粉 混凝土 氯离子渗透 冻融 

分 类 号：TU528.041[建筑科学—建筑技术科学]