砂蜡物理性质及其破坏形式研究
发布时间：2018-09-14 19:02
【摘要】：通过研究不同配比情况下砂蜡混合物标准样的单轴压缩实验,测定分析了其力学特性,并对试样压缩破坏的破裂情况进行了分析研究。结果表明,在含蜡量较小时,砂蜡的单轴抗压强度与蜡含量基本呈线性关系。而循环加载情况下,抗压强度变化不大;含蜡量高的砂蜡强度较大而变形较小,随着蜡含量的升高,砂蜡的割线模量E_(50)和弹性模量Et都增大,砂蜡试样的泊松比也呈现出上升趋势;砂蜡试样与煤岩试样相同,单轴压缩变形破坏形式也表现为复杂多变,蜡含量多(8%~14%)的砂蜡试样中多发生A类脆性剪切破坏型、B类楔劈式破坏型,而蜡含量低(4%~6%)的砂蜡试样破坏形式以C类挤压粉破柔性破坏型为主。
[Abstract]:By studying the uniaxial compression test of the standard sample of sand wax mixture with different ratios, the mechanical properties of the sample were measured and analyzed, and the fracture of the specimen under compression failure was studied. The results show that the uniaxial compressive strength of sand wax has a linear relationship with wax content when the wax content is small. However, under cyclic loading, the compressive strength of sand wax with high wax content is larger and the deformation is smaller. With the increase of wax content, the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase, and the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase with the increase of wax content. The Poisson's ratio of sand wax sample also shows an upward trend, and the sand wax sample is the same as the coal sample, and the failure form of uniaxial compression deformation is complex and changeable. In sand wax samples with high wax content (8% and 14%), A type brittle shear failure type and B type wedge type failure type occur, while the failure form of sand wax sample with low wax content (4%) is mainly type C extrusion powder breaking flexible failure type.
【作者单位】： 金陵科技学院建筑工程学院;苏交科集团股份有限责任公司;
【基金】：住房和城乡建设部2016年科学技术项目(2016-R3-020) 金陵科技学院校级科研基金(jit-2016-jlxm-16)
【分类号】：TB303;TD82
本文编号：2243605
[Abstract]:By studying the uniaxial compression test of the standard sample of sand wax mixture with different ratios, the mechanical properties of the sample were measured and analyzed, and the fracture of the specimen under compression failure was studied. The results show that the uniaxial compressive strength of sand wax has a linear relationship with wax content when the wax content is small. However, under cyclic loading, the compressive strength of sand wax with high wax content is larger and the deformation is smaller. With the increase of wax content, the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase, and the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase with the increase of wax content. The Poisson's ratio of sand wax sample also shows an upward trend, and the sand wax sample is the same as the coal sample, and the failure form of uniaxial compression deformation is complex and changeable. In sand wax samples with high wax content (8% and 14%), A type brittle shear failure type and B type wedge type failure type occur, while the failure form of sand wax sample with low wax content (4%) is mainly type C extrusion powder breaking flexible failure type.
【作者单位】： 金陵科技学院建筑工程学院;苏交科集团股份有限责任公司;
【基金】：住房和城乡建设部2016年科学技术项目(2016-R3-020) 金陵科技学院校级科研基金(jit-2016-jlxm-16)
【分类号】：TB303;TD82
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