超高韧度水泥基复合材料经亚高温处理后的性能
发布时间：2018-11-07 06:55
【摘要】：通过狗骨试件拉伸试验、数字图像影像相关处理(DIC)和立方体试块轴压试验,研究了高粉煤灰掺量的超高韧度水泥基复合材料(ECC)在亚高温处理后的力学性能。结果表明:在不高于200℃的温度处理后,ECC仍能实现多裂缝开裂,并能有效地控制裂缝的宽度。50、100℃温度处理明显提高了ECC的抗拉强度和应变能力,200℃时有所回落,但仍高于常温水平。DIC法的测试结果显示,各温度工况下基体在极限拉伸时的裂缝宽度相近,不同温度的影响主要体现在裂缝的数量上。在20、50和100℃时,ECC抗压强度大小相当,200℃时下降19.3%。适当的温度处理可以提高ECC基体的强度并改善纤维与基体的界面性能,从而提高ECC的抗拉性能和应变硬化能力。
[Abstract]:The mechanical properties of high toughness cement based composite (ECC) with high fly ash content were studied by tensile test, digital image correlation processing (DIC) and cube specimen axial compression test. The results show that ECC can still realize multi-crack cracking after temperature treatment at not more than 200 鈩，
本文编号：2315563
[Abstract]:The mechanical properties of high toughness cement based composite (ECC) with high fly ash content were studied by tensile test, digital image correlation processing (DIC) and cube specimen axial compression test. The results show that ECC can still realize multi-crack cracking after temperature treatment at not more than 200 鈩，
本文编号：2315563
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