饱和度对水工混凝土冻融劣化影响的研究
Influence of Saturation on Freeze-thaw Deterioration of Hydraulic Concrete
李永涛1
作者信息
- 1. 河南省荣晟水利建筑工程有限公司,河南 南阳 473000
- 折叠
摘要
为探究水工混凝土冻融劣化与混凝土饱和度之间关系,文中对不同饱和度混凝土开展冻融循环试验,并测试抗压强度残余数值.结果显示,饱和度为 85%～91.7%的试件在冻融循环结束时抗压强度残余为 89.49%,饱和度 91.7%～95%的试件在冻融循环结束时抗压强度残余为 86.78%,可见饱和度 91.7%～95%的试件抗压强度劣化效果相对较弱.饱和度为 100%的混凝土试件经冻融循环后逐渐产生表面剥落、骨料外露和骨料剥落,外表损失严重,混凝土存在饱和度临界值,只有小于饱和度临界值的混凝土才会在冻融循环后保持良好状态,反之表面则会出现严重损伤.
Abstract
In order to explore the relationship between freeze-thaw deterioration of hydraulic concrete and concrete saturation,the freeze-thaw cycle test was carried out on concrete with different saturation,and the residual compressive strength value was tested.The results show that the residual compressive strength of specimens with saturation of 85%～91.7%at the end of freeze-thaw cycle is 89.49%,and the residual compressive strength of specimens with saturation of 91.7%～95%at the end of freeze-thaw cycle is 86.78%,indicating that the deterioration effect of compressive strength of specimens with saturation of 91.7%～95%is relatively weak.The concrete specimen with saturation of 100%gradually produces surface spalling,aggregate exposure and aggregate spalling after freeze-thaw cycle,and the appearance loss is serious.The concrete has a saturation critical value,and only the concrete less than the saturation critical value will maintain a good condition after the freeze-thaw cycle,and otherwise,serious surface damage will occur.
关键词
混凝土/冻融劣化/饱和度Key words
Concrete/Freezing and thawing deterioration/Saturation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据