再生淤泥砖的力学性能及其影响因素分析

发布时间：2018-03-22 07:40

本文选题：再生淤泥砖　切入点：正交试验　出处：《新型建筑材料》2017年02期 　论文类型：期刊论文

【摘要】：研究了水灰比、泥灰比、石灰掺量及陶粒掺量对再生淤泥砖物理力学性能的影响。通过4因素3水平正交试验进行了再生淤泥砖的配合比组合设计,分析了各因素对再生淤泥砖性能的影响规律以及各水平间的差异关系。结果表明:泥灰比是影响再生淤泥砖强度和耐水性能最主要的因素,也是最显著因素,其最佳比例为3∶1。采用扫描电镜、X射线衍射方法对再生淤泥砖内部微观结构进行分析,结果显示,淤泥质中含有大量的活性SiO_2、Al_2O_3组分,这些组分在碱性条件下能激发内部活性,生成具有一定粘结强度的胶凝产物,从而对再生淤泥砖的力学性能起到提升作用。
[Abstract]:The effects of water cement ratio, mud cement ratio, lime content and ceramsite content on the physical and mechanical properties of regenerated silt brick were studied. The influence of various factors on the properties of recycled sludge brick and the difference between different levels are analyzed. The results show that the ratio of mud to cement is the most important factor and the most significant factor affecting the strength and water resistance of recycled mud brick. The optimum ratio is 3: 1.The internal microstructure of regenerated silt brick is analyzed by scanning electron microscopy (SEM) and X-ray diffraction. The results show that there are a lot of active SiO2AlSn2O3 components in the silt, which can excite the internal activity under alkaline conditions. The cementing product with certain bond strength is formed, which can improve the mechanical properties of regenerated silt brick.
【作者单位】：贵州理工学院土木工程学院;汕头大学土木工程系;
【基金】：国家自然科学基金项目(51378303,51378462) 广东省自然科学基金项目(S2013010011951) 广东省科技计划项目(2015A010105029) 广东省教育厅项目(2015KTSCX037)
【分类号】：TU522.1

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