摘要
为研究养护时间和基质含量对土石混合体力学特性的影响,室内制备了4种不同基质含量的土石混合体试样,养护时间分别为7、14、21、28d,开展了室内单轴压缩试验.试验结果表明:基质含量较少、养护时间较短时,试样破坏形式表现为塑性,试样破坏形态近似复杂劈裂.基质含量较多,养护时间较长时,试样破坏呈现为脆性,试样破坏形态接近单斜面剪切破坏.基质体积分数40%的试样在7~28d单轴抗压强度增加量很小,强度恢复主要在7d内.基质体积分数60%的试样强度恢复主要在14d内.基质体积分数80%和100%的试样单轴抗压强度在28d内均有较大的增长.通过分析养护时间、基质含量对试样峰值抗压强度的增幅和灵敏度的变化的影响,发现养护时间变化比基质含量对试样峰值抗压强度的影响大.
To investigate the impact of curing time and matrix content on the mechanical properties of soil-rock mixtures,laboratory-prepared samples with varying matrix contents were subjected to indoor uniaxial compression tests at different curing durations(7,14,21 d and 28 d).The results indicate that samples with lower matrix content and shorter curing times exhibit plastic failure,while those with higher matrix content and longer curing times display brittle failure,resembling complex splitting and shear failure,respectively.Notably,the uniaxial compressive strength of samples containing 40%matrix content shows minimal increase over the 7 d to 28 d period,with strength recovery primarily occurring within the initial 7 days.Samples with 60%matrix content experience significant strength recovery within 14 days,whereas samples containing 80%and 100%matrix content exhibit substantial increases in compressive strength within 28 days.Analysis reveals that curing time has a more pronounced impact on peak compressive strength than matrix content.
作者
禹克强
孙少锐
曹曜
王武超
黄佳豪
靳春林
赵博涵
YU Keqiang;SUN Shaorui;CAO Yao;Wang Wuchao;HUANG Jiahao;JIN Chunlin;ZHAO Bohan(School of Earth Science and Engineering,Hohai University,Nanjing 211000,China;Jiangsu Geological Survey Research Institute,Nanjing 210018,China;China Construction Industrial&Energy Engineering Group Co.Ltd.,Nanjing 210023,China)
出处
《河南科学》
2024年第7期994-1002,共9页
Henan Science
基金
国家自然科学基金项目(41672258)。
关键词
基质含量
养护时间
单轴压缩
力学特性
灵敏度
substrate content
maintenance time
uniaxial compression
mechanical properties
sensitivity
