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纳米SiO2和钢纤维增强混凝土的断裂韧度
Fracture Toughness of Nano SiO2 and Steel Fiber Reinforced Concrete
投稿时间:2016-03-11  修订日期:2016-06-08
DOI:10.3969/j.issn.1007 9629.2017.03.008
中文关键词:  混凝土  钢纤维  纳米SiO2  断裂韧度
英文关键词:concrete  steel fiber  nano SiO2  fracture toughness
基金项目:河南省高校科技创新人才计划项目(16HASTIT012);河南省教育厅科学技术研究重点项目(14A560005);郑州大学优秀青年教师发展基金项目(1421323079)
           
作者单位
张鹏
ZHANG Peng
郑州大学水利与环境学院,河南郑州450001
School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
李清富
LI Qingfu
郑州大学水利与环境学院,河南郑州450001
School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
朱海堂
ZHU Haitang
郑州大学水利与环境学院,河南郑州450001
School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
张天航
ZHANG Tianhang
郑州大学水利与环境学院,河南郑州450001
School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
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中文摘要:
      通过普通混凝土、纳米混凝土和钢纤维增强纳米混凝土三点弯曲小梁试件断裂试验,探讨了纳米SiO2质量分数、钢纤维体积分数、预切口深度对混凝土断裂参数以及荷载挠度曲线的影响.结果表明:在一定掺量范围内,纳米SiO2和钢纤维的掺入可以提高混凝土的断裂韧度;当纳米SiO2质量分数小于5%时,试件断裂韧度随着纳米SiO2质量分数的增加而逐渐增大,而当纳米SiO2质量分数超过5%后,试件断裂韧度随纳米SiO2质量分数增大有下降趋势;随着钢纤维体积分数的增加,试件断裂韧度逐渐增大;随着切口深度的增大,试件断裂韧度逐渐减小.
英文摘要:
      The effects of nano SiO2 mass fraction, steel fiber volume fraction, notch depth on fracture parameters and load deflection curves of the nano SiO2 and steel fiber reinforced concrete specimens were investigated and analyzed through the three point bending test. The results indicate that the addition of nano SiO2 and steel fiber can improve the fracture toughness of the specimens with the appropriate fraction. When nano SiO2 mass fraction is less than 5%, the fracture toughness is increased gradually with the increase of nano SiO2 mass fraction. While, the fracture toughness begins to decrease with the increase of nano SiO2 mass fraction after nano SiO2 mass fraction exceeds 5%. With the increase of steel fiber volume fraction, the fracture toughness is increased. The fracture toughness of the specimens decreases with the increase of the notch depth.
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