发泡聚苯乙烯轻质混凝土饱水软化后的强度与变形特征

发布时间：2018-02-04 00:47

本文关键词： 聚苯颗粒混凝土水理性质峰值强度割线模量软化效应弹塑性体轻质路基　出处：《科学技术与工程》2017年18期 　论文类型：期刊论文

【摘要】：与普通混凝土类似,聚苯颗粒混凝土遇水也表现出软化效应,导致强度和刚度参数下降,为此,基于饱水软化试验,对不同干密度聚苯颗粒混凝土饱水72 h后进行了强度试验,结果表明:聚苯颗粒混凝土的软化系数在0.8附近及其以上,接近于耐水性材料。饱水或干燥时,应变在1%~2%范围内时变形以弹性变形为主,且峰值强度在3%附近。当应变在2%以前,饱水前后应力-应变曲线较为接近,表明在弹性阶段饱水前后力学性质较为接近,2%应变以后,表现为峰值强度下降,割线模量降低。
[Abstract]:Similar to ordinary concrete, polystyrene granular concrete also shows softening effect when it comes to water, which leads to the decrease of strength and stiffness parameters. Therefore, based on saturated softening test. The strength tests of polystyrene granular concrete with different dry density were carried out after 72 h of saturated water. The results show that the softening coefficient of polystyrene granular concrete is around 0.8 and above. When the strain is in the range of 1% or 2%, the deformation is mainly elastic deformation, and the peak strength is near 3%. When the strain is before 2%, the strain is close to the water-resistant material. The stress-strain curves before and after saturated water are close to each other, indicating that the peak strength and Secant modulus decrease after the mechanical properties are close to 2% strain in the elastic stage.
【作者单位】：北方民族大学化学与化学工程学院;宁夏大学物理电气信息学院;宁夏旭日众粒环保科技有限公司;
【基金】：国家自然科学基金(51369001,51569001) 国家民委化工技术重点实验室研究项目(2011SY05)资助
【分类号】：TU528
【正文快照】： 引用格式:罗玉财,康亚明,何贤元,等.发泡聚苯乙烯轻质混凝土饱水软化后的强度与变形特征[J].科学技术与工程,2017,17(18):294—298Luo Yucai,Kang Yaming,He Xianyuan,et al.The characteristics ofstrength and deformation of expanded ploystyrene lightweight concrete af

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