含水率对生活垃圾炉渣强度特性的影响

发布时间：2019-04-29 12:40

【摘要】：生活垃圾炉渣可以作为新型路基材料使用,为研究含水率对其强度特性的影响,首先对其材料特性进行分析,其次对含水率10%~20%范围内的垃圾炉渣进行超声波波速试验、饱和三轴固结排水剪切试验及无侧限抗压强度试验.结果表明:垃圾炉渣的主要成分为SiO_2,最佳含水率约为15.5%,最大干密度约为1.52g·cm~(-3),属于级配良好砾类土;含水率对垃圾炉渣的强度具有影响,含水率10%~20%范围内的垃圾炉渣的超声波波速、最大主应力差及单轴抗压强度随初始制样含水率的增加表现为先增加后减小的趋势,含水率约15%时达到峰值;基于弹性理论,得到了不同含水率时炉渣的泊松比、粘聚力及单轴抗压强度的关系,可为深入分析炉渣的强度特性提供理论依据.
[Abstract]:Domestic refuse slag can be used as a new roadbed material. In order to study the influence of moisture content on its strength characteristics, firstly, the material characteristics are analyzed. Secondly, the ultrasonic wave velocity test is carried out on the garbage slag in the range of 10% water content and 20% water content. Saturated triaxial consolidation drainage shear test and unconfined compressive strength test. The results show that the optimum moisture content of SiO_2, is about 15.5% and the maximum dry density is about 1.52g cm~ (- 3), which belongs to well graded gravel soil. The ultrasonic wave velocity, the maximum principal stress difference and the uniaxial compressive strength of the slag in the range of 10% and 20% of the moisture content increased first and then decreased with the increase of the initial sample moisture content. When the moisture content is about 15%, it reaches the peak value; Based on elastic theory, the relations among Poisson's ratio, cohesive force and uniaxial compressive strength of slag with different moisture content are obtained, which can provide theoretical basis for further analysis of slag strength characteristics.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;黄河中下游数字地理技术教育部重点实验室河南大学;
【基金】：国家自然科学基金资助项目(41401107)~~
【分类号】：U414

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