ECC抗压强度及其尺寸效应的试验研究
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摘要
采用不同尺寸和形状的试件进行了ECC立方抗压强度和轴心抗压强度的试验,研究ECC和水泥砂浆基体的抗压强度尺寸效应及轴心抗压强度和立方抗压强度的关系,结果表明体积分数为2%的ECC抗压强度低于水泥砂浆基体,且ECC的抗压强度存在尺寸效应,ECC及水泥基材受压破坏的环箍效应小于混凝土,ECC的棱柱与立方体的抗压强度比高于混凝土的抗压强度比。
Samples with different sizes and shapes were used to test the ECC cube compressive strength and axial compressive strength and to study the relation of compressive strength dimensional effect with axial compressive strength and cube compressive strength of ECC and cement slurry. It was found that the compressive strength of ECC with 2% volume fraction is lower than cement slurry matrix, and that compressive strength of ECC has dimensional effect, and that hoop effect of ECC and cement matrix material under compression failure, and that prism-cube compressive strength ratio of ECC is higher than concrete.
Samples with different sizes and shapes were used to test the ECC cube compressive strength and axial compressive strength and to study the relation of compressive strength dimensional effect with axial compressive strength and cube compressive strength of ECC and cement slurry. It was found that the compressive strength of ECC with 2% volume fraction is lower than cement slurry matrix, and that compressive strength of ECC has dimensional effect, and that hoop effect of ECC and cement matrix material under compression failure, and that prism-cube compressive strength ratio of ECC is higher than concrete.
引文
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[3]李艳,程格格,刘泽军.聚乙烯醇纤维增强水泥基复合材料单轴受压强度与变形特性分析[J].工业建筑,2017,47(4):122-126.
[4]邓明科,常云涛,梁兴文,等.高延性水泥基复合材料抗压强度尺寸效应的正交试验研究[J].工业建筑,2013,43(7):80-85.
[5]白亮,周枫,谢鹏飞,等.高延性纤维增强水泥基复合材料力学性能试验研究[J].工业建筑,2017,47(6):108-113.
[6]王晶.高延性水泥基复合材料力学性能试验研究[D].西安:西安建筑科技大学,2013.
[7]秦萌.高延性纤维混凝土受压力学性能试验研究[D].西安:西安建筑科技大学,2014.
[8]何淅淅,丁鲁波.聚乙烯醇纤维水泥基复合材料受压弹性模量试验研究[J].工业建筑,2016(9):11-116.
[9]李艳,刘泽军.高韧性PVA-FRCC单轴受压力学性能及本构关系[J].Jianzhu Cailiao Xuebao:Journal of Building Materials,2014,17(4).
[10]胡春红,高艳娥,丁万聪.超高韧性水泥基复合材料受压性能试验研究[J].建筑结构学报,2013,34(12):128-132.
[11]谭忆秋,欧阳剑,王金风,等.高强型CA砂浆力学性能影响因素及力学机理研究[J].铁道学报,2012,34(7):122-125
[12]Yi S T,Yang E I,Choi J C.Effect of specimen sizes,specimen shapes,and placement directions on compressive strength of concrete[J].Nuclear Engineering and Design,2006,236(2):115-127.
[13]2012年全国砌体结构领域基本理论与工程应用学术会议[C].2012.