早期受冻温度对负温混凝土微观结构与强度的影响OACSTPCD
Effect of freezing temperature on microstructure and compressive strength of negative temperature concrete
为降低负温给混凝土结构带来的内部损伤,采用压汞法测孔、扫描电镜微观形貌观察等实验手段,研究在不同温度早期受冻混凝土的孔径分布和微观结构及其抗压强度随龄期发展变化情况,探讨不同冻结温度下负温混凝土微观结构与宏观力学性能的关系.结果表明:早期养护温度越低,水泥石初始结构越疏松,＜ 20 nm的凝胶孔含量明显降低,混凝土抗压强度较低；转入标准养护后,负温混凝土孔径趋于细化,抗压强度得以迅速增长,-5℃受冻的混凝土,转标准养护28 d后＞ 200 nm孔…查看全部>>
Aimed at reducing effect of the negative temperature on internal damage to the concrete structure, the pore size distribution and the microstructure of negative temperature concrete was studied with different temperature, combining with some testing methods, such as MIP and SEM. Moreover, the change of the compressive strength was also studied with different ages. In addition, the relationship between the microstructure and the macro-mechanical properties on…查看全部>>
董淑慧;冯德成;江守恒;朱卫中
土木建筑
早期受冻混凝土微观结构抗压强度
negative temperatureconcretemicrostructurecompressive strength
《黑龙江科技学院学报》 2013 (1)
63-66,4
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