摘要
在分析负温下砼受冻害成因时，以冻结温度、时间、砼强度等级、水灰比、防冻剂的类型、抗冻临界强度等参数为变量，采用逐步Ｌｏｇｉｓｔｉｃ判别函数进行分析新拌砼从入模到具有相当的抗冻临界强度时的受冻害成因。结果表明，对新拌砼冻害影响关系最强的参数为防冻剂的类型、抗冻临界强度及水灰比，由此构成负温下砼受冻害成因，在砼工程防冻害减灾技术中宜从这三个参数入手。
Based on parameters of the freezing temperature,frost time,strength grade of concrete,water cement ratio,antifreezing admixture type and resistant freezing critical strength of concrete at minus-temperature ect., the stage by stage Logistic method is applied for discriminating analysis of fresh concrete frost damage cause of formation at minus-temperature. It was showed that there are three parameters to effect fresh concrete freezing process,i,e antifreezing admixture type, resistant critical strength of concrete and water-cement ratio.If they could be controlled, the fresh concrete frost damage at minus-temperature would be avoided.
出处
《低温建筑技术》
北大核心
1999年第3期10-13,共4页
Low Temperature Architecture Technology
基金
黑龙江省自然科学基金
关键词
防冻剂
LOGISTIC
判别函数
混凝土
冻害
成因
Antifreezing admixture
resistant critical strength
water-cement ratio
stage-by-stage Logistic discriminant function
