摘要
普通混凝土易开裂,韧性较差。文中主要通过混凝土抗冲击试验,研究了在普通混凝土中掺入不同长度的合成聚丙烯纤维及聚丙烯腈纤维,以改善混凝土的脆性性能,提高混凝土的韧性。试验中在混凝土中分别掺入长度为20mm合成聚丙烯纤维、40mm合成聚丙烯纤维及单丝聚丙烯腈纤维,每种纤维掺量分别为1kg/m^(3),3kg/m^(3),6kg/m^(3),9kg/m^(3),通过改变纤维掺量研究不同掺量下合成纤维对混凝土抗冲击荷载的影响规律。实验研究结果表明纤维混凝土的抗冲击性能随纤维掺量提高显著提升,纤维含量为9kg/m^(3)的40mm聚丙烯纤维混凝土试件其抗冲击韧性最好,相较于普通混凝土的抗冲击韧性提高了306.67%。
Thenormal concrete is easy to crack and its toughness is poor.In this paper,different lengths of synthetic polypropylene fiber and polyacrylonitrile fiber are mixed into normal concrete to improve the brittleness and toughness of concrete.Through the concrete impact test device,the drop weight impact test was carried out on the cube specimens of synthetic polypropylene fiber concrete,polyacrylonitrile fiber concrete and ordinary concrete.In the experiment,20 mm synthetic polypropylene fiber,40 mm synthetic polypropylene fiber and monofilament polyacrylonitrile fiber were added into the concrete,respectively.The influence of synthetic fiber on the impact load of concrete was studied by changing the fiber content.The content of each fiber was 1 kg/m^(3),3kg/m^(3),6kg/m^(3),9kg/m^(3).The experimental results show that the impact resistance of fiber reinforced concrete increases significantly with the increase of fiber content.The impact toughness of fiber reinforced concrete with 40mm length and 9 kg/m^(3) synthetic polypropylene fiber is the best,which is 306.67%higher than that of normal concrete.
作者
田文基
李长辉
牛炳岩
岳泽皓
王蕴智
TIAN Wen-ji;LI Chang-hui;NIU Bing-yan;YUE Ze-hao;WANG Yun-zhi(School of Transportation Science and Engineering, Civil Aviation University of China, 300300, Tianjin, China)
出处
《河北水利电力学院学报》
2021年第4期23-27,共5页
Journal of Hebei University Of Water Resources And Electric Engineering
基金
中国民航大学专项资助项目“大学生创新创业训练计划项目”(202010059124)
国家自然科学基金资助项目(51808270)
中国民航大学专项资助项目“中央高校基本科研业务费项目”(3122019106)。
关键词
纤维增强混凝土
合成聚丙烯纤维
聚丙烯腈纤维
冲击试验
冲击韧性
fiber reinforced concrete
synthetic polypropylene fiber
polyacrylonitrile fiber
concrete impact test
impact toughnes