棉花秸秆水泥基砌块材料单轴受压性能研究

发布时间：2018-02-21 03:17

本文关键词： 棉花秸秆水泥基砌块单轴受压弹性模量泊松比应力-应变全曲线本构方程　出处：《混凝土》2014年12期 　论文类型：期刊论文

【摘要】：配置3种不同强度等级棉花秸秆水泥基砌块,进行单轴受压试验。研究棉花秸秆水泥基砌块在单轴受压状态下的破坏过程与形态,分析材料抗压强度、弹性模量、泊松比、应力-应变全曲线、峰值应变、极限应变等单轴受压力学性能;提出3种不同强度等级棉花秸秆水泥基砌块材料的应力-应变全曲线本构方程,并与普通混凝土砌块的应力-应变全曲线对比。结果表明:棉花秸秆水泥基砌块材料呈剪切破坏;棉花秸秆在水泥基砌块中的拉结作用提高了材料的残余强度与稳定承载能力;用两段式方程对棉花秸秆水泥基砌块应力-应变全曲线进行拟合的结果与试验结果吻合较好。
[Abstract]:The uniaxial compression test of cotton straw cement block with three different strength grades was carried out. The failure process and morphology of cotton straw cement block under uniaxial compression were studied, and the compressive strength, elastic modulus and Poisson's ratio of the material were analyzed. The stress-strain full curve, peak strain, limit strain and other uniaxial compressive mechanical properties are proposed, and the stress-strain full curve constitutive equations of three different strength grades of cotton straw cement block materials are presented. Compared with the stress-strain curve of ordinary concrete block, the results show that the cotton straw cement block material is shearing failure, the cotton straw in the cement block can improve the residual strength and stable bearing capacity of the material, and the tensile action of cotton straw in cement based block increases the residual strength and stable bearing capacity of the material. The results of fitting the stress-strain curve of cotton straw cement block with two-stage equation are in good agreement with the experimental results.
【作者单位】：新疆农业大学水利与土木工程学院;
【基金】：国家自然科学基金资助项目(11242007) 教育部科学技术研究重点项目(212194) 中国科学院“西部之光”人才培养计划项目(RCPY201208) 国家“十二五”科技支撑计划课题(2013BAJ12B05)
【分类号】：TU522.3

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