摘要
主要研究不同冻结模式对水工混凝土的防冻性能的影响,试验结果表明:负温养护制度对水工混凝土强度发展有着至关重要的影响。-20℃~5℃的自然变负温条件下,水工混凝土的早期结构未受到破坏,在负温环境下强度已增长到标养条件下的75%以上,转入标准养护环境下,强度如期恢复。然而恒负温条件下,混凝土的强度仅能达到标养条件下的13%,转入标准养护环境下,强度虽能如期恢复,但出现倒缩现象。
This paper mainly studies frost resistance of hydraulic concrete under different freezing modes. The results show that negative temperature curing system has a crucial influence on the hydraulic concrete strength development. The strength of hydraulic concrete arrived at 75% of standard curing, which are curing outdoor varied negative temperature. And then the strength of hydraulic concrete was re- covered which switch to standard curing. The strength of hydraulic concrete arrived at 13% of standard curing, which are curing constant negative temperature. And then the strength of hydraulic concrete was recovered and had a few reduce which switch to standard curing.
出处
《低温建筑技术》
2014年第1期8-10,共3页
Low Temperature Architecture Technology
基金
水利部公益性行业科研专项经费项目(201001027)
关键词
水工混凝土
冻结模式
防冻性能
hydraulic concrete
freezing mode
frost resistance