不同养护条件下混凝土早期内部相对湿度变化的研究(二)  

Study on Concrete's Internal Early Change of the Relative Humidity under Different Curing Conditions(Part Ⅱ)

作　　者：于韵[1] 蒋正武[1] 

机构地区：[1]同济大学混凝土材料研究国家重点实验室,上海200092

出　　处：《建材技术与应用》2003年第6期6-7,共2页Research and Application of Building Materials

基　　金：同济大学工科基金项目资助

摘　　要：In this paper,internal relative humidity(IRH)of concrete with different W/C ratios under different curing conditions at early ages are studied by testing IRH change of concrete.Its results indicate,under no-curing condition,the IRH reduction of concrete is mainly dependent on moisture diffusion as well as self-desiccation.With the reduction of W/C ratio,the effect of moisture diffusion on IRH reduces,the effect of self-desiccation increases, and meanwhile,the reduction of lRH at different ages increases.After water curing for 28 days,the reduction of IRH with different W/C ratio is mainly dependent on moisture diffusion,and its declining trend is obviously affected by W/C ratios.In this paper,internal relative humidity(IRH)of concrete with different W/C ratios under different curing conditions at early ages are studied by testing IRH change of concrete.Its results indicate,under no-curing condition,the IRH reduction of concrete is mainly dependent on moisture diffusion as well as self-desiccation.With the reduction of W/C ratio,the effect of moisture diffusion on IRH reduces,the effect of self-desiccation increases, and meanwhile,the reduction of lRH at different ages increases.After water curing for 28 days,the reduction of IRH with different W/C ratio is mainly dependent on moisture diffusion,and its declining trend is obviously affected by W/C ratios.

关 键 词：混凝土 养护 相对湿度 水灰比 龄期 干燥 

分 类 号：TU528[建筑科学—建筑技术科学]