防冻组分对负温混凝土性能的影响  

Influence of anti-freezing components on the performances of concrete

作　　者：宋东升 戴民[2] 盖永丰 张景丽[4] 辛运来 

机构地区：[1]沈阳泰丰特种混凝土有限公司,辽宁沈阳110002 [2]沈阳建筑大学,辽宁沈阳110168 [3]沈阳产品质量监督检验院,辽宁沈阳110022 [4]沈阳新世界混凝土有限公司,辽宁沈阳110002

出　　处：《混凝土》2011年第8期55-56,61,共3页Concrete

摘　　要：为明确防冻组分对混凝土性能的影响,改变亚硝酸钠、硝酸钙、乙二醇占混凝土拌合水量的百分比,测试了三种防冻组分不同掺量时混凝土的流动性及不同养护条件下的抗压强度比。结果表明,亚硝酸钠、硝酸钙对混凝土初始坍落度影响不大,随掺量增加,30 min坍落度损失增加,乙二醇可明显降低混凝土30min坍落度损失;三种防冻组分均明显提高混凝土冻后强度,亚硝酸钠、硝酸钙对混凝土标准养护强度影响不明显,乙二醇可提高混凝土标准养护强度。Sodium nitrite,calcium nitrate and glycol were doped into concrete respectively,and the fluidity and the compression strength ratio of concrete were tested.The results indicted that the primary slump was affected hardly by doping sodium nitrite and calcium nitrate,the loss of 30 min slump was on the increase with the dosage of the two components,and on the decrease with the dosage of glycol.In addition,the compression strength of concrete frozen was improved obviously by doping the three anti-freezing components,and the compression strength with standard cur-ing was improved by doping glycol but sodium nitrite and calcium nitrate.

关 键 词：防冻剂 亚硝酸钠 硝酸钙 乙二醇 

分 类 号：TU528.01[建筑科学—建筑技术科学]