再生细骨料保温混凝土抗压强度试验研究

发布时间：2018-02-09 16:06

本文关键词： 再生细骨料保温混凝土取代率抗压强度离散性　出处：《新型建筑材料》2017年07期 　论文类型：期刊论文

【摘要】：对6种不同再生细骨料取代率的再生细骨料保温混凝土进行抗压强度试验,并依据试验作出其抗压强度正态分布概率密度曲线,分析混凝土抗压强度及其变化特点。研究表明:再生细骨料取代率不超过80%时,混凝土7 d及28 d抗压强度随着再生细骨料取代率的增大而提高,7 d、28 d抗压强度最大分别为33.1、35.4 MPa;7 d抗压强度标准差基本稳定在1.65±0.3 MPa,取代率对其影响较小;28 d抗压强度标准差随取代率的增加而增大,且在取代率为20%时,标准差为3.34 MPa,符合GB/T 50107—2010及JGJ 55—2011中对最小标准差的规定,应按实测值标准差确定。
[Abstract]:The compressive strength test of recycled fine aggregate insulation concrete with different recycled fine aggregate replacement rate was carried out, and the probability density curve of normal distribution of compressive strength was made according to the test. The compressive strength of concrete and its variation characteristics are analyzed. The results show that when the replacement rate of recycled fine aggregate is not more than 80%, The compressive strength of concrete at 7 d and 28 d increases with the increase of the replacement ratio of recycled fine aggregate. The maximum compressive strength of concrete at 7 d is 33.1g / 35.4 MPA / g, respectively. The standard deviation of compressive strength is basically stable at 1.65 卤0.3 MPa, and the substitution ratio has little effect on the compressive strength of the concrete for 28 days. The strength standard deviation increases with the increase of substitution rate. When the substitution rate is 20, the standard deviation is 3.34 MPA, which accords with the minimum standard deviation in GB/T 50107-2010 and JGJ 55-2011, and should be determined according to the standard deviation of measured value.
【作者单位】：太原理工大学建筑与土木工程学院;
【基金】：国家自然科学基金项目(51678384,51508370) 山西省自然科学基金项目(2014011033-1) 山西省高等教育学校教学改革项目(J2014019)
【分类号】：TU528

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