水胶比对沙漠砂混凝土力学性能和孔结构的影响  

Effect of water-binder ratio on mechanical properties and pore structure of desert sand concrete

作　　者：白杰 BAI Jie(China Railway 20th Bureau Group Co.,Ltd.,Xi’an 710016,China)

机构地区：[1]中铁二十局集团有限公司,陕西西安710016

出　　处：《陕西煤炭》2025年第4期47-51,共5页Shaanxi Coal

摘　　要：为探讨水胶比对沙漠砂混凝土力学性能和孔结构的影响,利用力学性能和核磁共振试验相结合的方法,结合灰色关联熵分析孔隙结构参数与抗压强度之间的相关性。结果表明,随着水胶比的增加,抗压强度呈递减趋势,水胶比为0.42时最优;混凝土孔径分布曲线呈现3~4个峰,主峰幅值随水胶比增大而减小;结合灰熵关联度可知,无害孔>少害孔>多害孔>有害孔;水胶比的增加导致内部流动的水增大,其内部产生较多孔隙,促使局部孔隙率增大,进而削弱其力学性能。In order to explore the influence of water-binder ratio on the mechanical properties and pore structure of desert sand concrete,the correlation between pore structure parameters and compressive strength was analyzed by mechanical properties and nuclear magnetic resonance test combined with grey correlation entropy.The results indicate a decrease in compressive strength with higher water-binder ratios,and the optimum water-binder ratio is 0.42.The pore size distribution curve of concrete shows 3~4 peaks,and the main peak’s amplitude declines as the water-binder ratio rises.The grey entropy correlation degree is:harmless hole>less harmful hole>more harmful hole>harmful hole;the increase of water-binder ratio leads to the increase of water flowing inside,and more pores are generated inside,which promotes the increase of local porosity and weakens its mechanical properties.

关 键 词：沙漠砂混凝土 力学性能 孔结构 灰色分析 

分 类 号：TU528[建筑科学—建筑技术科学]