摘要
研究了不同条件下,NaCl对混凝土饱水度的影响。结果表明:对毛细管吸水法,NaCl含量愈高,混凝土内部毛细管平衡饱水度增加愈明显,混凝土的吸水速度和达到平衡饱水度的时间愈快。对不同湿度环境中失水法,NaCl含量愈高,混凝土内部平衡饱水度愈高,混凝土的失水速度和达到失水平衡饱水度的时间愈慢。由此可知:NaCl的存在将增加混凝土的盐冻破坏。
The degree of saturation under different environmental conditions was investigated. Results show that for the capillary up-take test, the equilibrium degree of capillary in concrete is enhanced with increasing NaCl content, but the time to reach the equilibrium degree is shorter and the up-take rate is higher. For the water-loss test under different humidity values, the equilibrium degree of saturation in concrete also increases with increasing NaC1 content, but the time to reach the equilibrium degree is longer and the water-loss rate is lower. The results prove that the frost damage of concrete is aggravated in the presence of NaCl.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第11期1422-1425,共4页
Journal of The Chinese Ceramic Society
基金
西部交通建设科技(2001318788774)资助项目
关键词
氯化钠
饱水度
混凝土
盐冻机理
sodium chloride
degree of saturation
concrete
deicer- frost mechanism
