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《Journal of Hydroelectric Engineering》 2018-09
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Experimental study on fracture energy of fiber and nano-particle reinforced concrete

ZHANG Peng;LI Qingfu;HAN Juhong;ZHANG Tianhang;School of Water Conservancy and Environment,Zhengzhou University;  
Experimental tests on three-point bending fracture of steel fiber and nano-particle reinforced concrete is conducted to study the effect of nano-particles, steel fibers and relative notch depth on its fracture toughness, focusing on the measurements of fracture energy and fracture process. The test results indicate that adding appropriate contents of nano-Si O2 and steel fibers to the concrete can improve its fracture energy significantly. As the nano-Si O2 content is increasing, fracture energy is increased gradually up to a peak content of 5% and then decreased gradually. And with the increasing steel fiber content, it manifests a similar tendency and has a peak value at the content of 2%. The depth of a relative notch on a beam specimen has great effect on its fracture energy that is decreased gradually with the increasing depth.
【Fund】: 国家自然科学基金(51679921);; 河南省高校科技创新人才计划项目(16HASTIT012)
【CateGory Index】: TU528
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