玄武岩纤维对再生砂浆强度增长速率的探究
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摘要
胶凝体采取水泥与粉煤灰7∶3的比例,骨料采取1∶1的天然砂和再生砂配置再生砂浆,通过掺加6 mm,12 mm和18 mm三种不同长度和0. 05%,0. 15%和0. 25%三种掺率的玄武岩纤维,得出纤维掺率增加和纤维越短对再生砂浆抗裂性越有利;并得出玄武岩纤维为12 mm掺率为0. 15%时抗压强度增长最快;抗折强度前期长度为12 mm、纤维掺率越大的增长越快,后期长度越短、掺率越小的增长越快。
The cementitious body adopts cement and fly ash 7∶ 3 ratio,the aggregate adopts 1∶ 1 natural sand and reclaimed sand with reclaimed mortar. By adding 6 mm,12 mm and 18 mm with different length and 0. 05%,0. 15% and 0. 25% of basalt fiber,it is concluded that the increase of fiber mixing rate and the shorter fiber are favorable to the crack resistance of reclaimed mortar. And it is concluded that the increase of compressive strength is fastest when basalt fiber is 12 mm and content is 0. 15%. The higher the length of the fiber,the faster the increase,the shorter the length and the smaller the increase.
The cementitious body adopts cement and fly ash 7∶ 3 ratio,the aggregate adopts 1∶ 1 natural sand and reclaimed sand with reclaimed mortar. By adding 6 mm,12 mm and 18 mm with different length and 0. 05%,0. 15% and 0. 25% of basalt fiber,it is concluded that the increase of fiber mixing rate and the shorter fiber are favorable to the crack resistance of reclaimed mortar. And it is concluded that the increase of compressive strength is fastest when basalt fiber is 12 mm and content is 0. 15%. The higher the length of the fiber,the faster the increase,the shorter the length and the smaller the increase.
引文
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[10] Alhozaimy AM,Soroushian P,Mirza F. Mechanical properties of polypropylene fiber reinforced concrete and the effects of pozzolanic materials[J]. Cement Concrete Compos,1996,18(2):85-92.
[2]张兰芳,尹玉龙.玄武岩纤维增强混凝土力学性能的研究[J].硅酸盐通报,2014,33(11):2834-2837.
[3]叶邦土,蒋金洋.玄武岩纤维及其增强水泥基材料的研究进展[J].材料导报A:综述篇,2013,27(10):102-108.
[4] Zhao D F,Liu H W,Chen Z G. Advantages of Basalt Fiber Reinforced Concrete Structures[C]. Proceedings of the Second International Conferenceon Advanced Textile Materials&Manufacturing Technology,Hangzhou:Zhejiang University Press,2010.
[5]王钧,任靖豪,郭大鹏.短切玄武岩纤维混凝土基本力学性能的尺寸效应[J].建筑科学与工程学报,2015(5):345.
[6]王钧,马跃,张野,等.短切玄武岩纤维混凝土力学性能试验与分析[J].工程力学,2014(S1):37.
[7] Jiang C H,Fan K,Wu F,et al. Experimental study on the mechanical properties and microstructure of chopped basaltfibre reinforced concrete[J]. Materials and Design,2014(58):187-193.
[8]林志龙,林进,林志超,等.玄武岩纤维混凝土的力学性能研究[J].福建建材,2016(1):41.
[9]董进秋,杜艳廷,闻宝联,等.玄武岩纤维混凝土力学性能与增韧机理研究[J].工业建筑,2011(S1):56.
[10] Alhozaimy AM,Soroushian P,Mirza F. Mechanical properties of polypropylene fiber reinforced concrete and the effects of pozzolanic materials[J]. Cement Concrete Compos,1996,18(2):85-92.