摘要
为了综合评价再生混凝土的抗拉性能,系统完成了5种水灰比情况下再生混凝土的轴心抗拉性能和劈裂抗拉强度试验,研究了再生混凝土的抗拉性能,分析了再生混凝土的轴心抗拉强度随着水灰比的变化规律,考察了普通混凝土轴心抗拉强度和劈裂抗拉强度计算公式对再生混凝土的适用性,讨论了再生混凝土轴心抗拉强度和劈裂抗拉强度的关系。试验结果表明,再生混凝土的立方体抗压强度和轴心抗拉强度随着水灰比的增加而降低;普通混凝土轴心抗拉强度和劈裂抗拉强度计算公式也适用于再生混凝土;再生混凝土轴拉强度和劈裂抗拉强度基本相同。在对试验数据统计分析的基础上,建立了再生混凝土峰值拉应变的计算公式,并给出了再生混凝土应力-裂缝宽度的关系式。
In order to evaluate the tensile behavior of recycled aggregate concrete, the uniaxial tensile behavior and the splitting tensile strength of recycled aggregate concrete with 5 different water/cement ratios were experimental investigated. The variations of the uniaxial tensile strength of recycled aggregate concrete with the water/cement ratio were studied; the suitability of applying the corresponding correlations for the strengths of normal concrete to recycled aggregate concrete was discussed. The relationship between uniaxial tensile strength and splitting tensile strength for recycled aggregate concrete was analyzed. The test results indicated that the uniaxial tensile strength and the cube compressive strength decrease with the increase of the water/cement ratio. The equations for the unlaxial tensile strength and the splitting tensile strength of normal concrete can be used for recycled aggregate concrete. The uniaxial tensile strength of recycled aggregate concrete does not differ much compare to the splitting tensile strength. Based on the test results, equations for the tensile peak strain and the stress-crack width of recycled aggregate concrete were developed.
出处
《四川建筑科学研究》
2013年第4期263-267,共5页
Sichuan Building Science
关键词
再生混凝土
轴心抗拉性能
劈裂抗拉强度
recycled aggregate concrete
uniaxial tensile behavior
splitting tensile strength
