| 玄武岩纤维混凝土力学性能与增韧机理研究 |
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| 引用本文： | 董进秋,杜艳廷,闻宝联,孙立喜,王嘉庆.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(Z1):638-641. |
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| 作者姓名： | 董进秋 杜艳廷 闻宝联 孙立喜 王嘉庆 |
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| 作者单位： | 天津市市政工程研究院; |
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| 基金项目： | 国家自然科学基金资助项目(10802073) |
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| 摘 要： | 玄武岩纤维作为一种新型的工程纤维,已经引起了材料界与工程界的广泛关注。本试验研究了玄武岩纤维掺量分别为0,0.5,1.0,1.5,2.0,2.5 kg/m3情况下,玄武岩纤维混凝土的力学性能,并对其增强增韧机理进行了分析。试验结果表明:玄武岩纤维混凝土破坏形式体现出脆性破坏的特性,其28 d抗压强度较素混凝土提高了为5%~10%,但其掺量超过1.5 kg/m3后,其抗压强度呈下降的趋势。玄武岩纤维混凝土其韧性有较大幅度的提高,抗折强度较素混凝土提高了21%~29%,其抗冲击性能是基准混凝土的1.4倍~3.1倍。玄武岩纤维在混凝土基体中呈三维乱向均匀分布,起到了"二次微加筋"作用,通过纤维与水泥基体间的摩擦与纤维的拉拔作用,及基体中裂缝的萌生与扩展从而消耗基体的能量,起到增强增韧的作用。
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| 关 键 词： | 玄武岩纤维混凝土 掺量 力学性能 增韧机理 |
RESEARCH ON MECHANICAL PROPERTIES AND TOUGHENING MECHANISM OF BASALT FIBER REINFORCED CONCRETE |
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| Dong Jinqiu Du Yanting Wen Baolian Sun Lixi Wang Jiaqing.RESEARCH ON MECHANICAL PROPERTIES AND TOUGHENING MECHANISM OF BASALT FIBER REINFORCED CONCRETE[J].Industrial Construction,2011(Z1):638-641. |
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| Authors: | Dong Jinqiu Du Yanting Wen Baolian Sun Lixi Wang Jiaqing |
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| Affiliation: | Dong Jinqiu Du Yanting Wen Baolian Sun Lixi Wang Jiaqing(Tianjin Municipal Engineering Research Institute,Tianjin 300074,China) |
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| Abstract: | Basalt fiber,as a new type of engineering fibers,has attracted great attention in the materials and engineering areas.The mechanical properties and toughening mechanism of basalt fiber reinforced concrete(BFRC) with different fiber proportion ranging from 0 to 2.5 kg/m3 were tested in the experiment.The results show that brittle failure mode of BFRC is observed,but the basalt fiber can improve the impact toughness of BFRC significantly.Compared to plain concrete,the compressive strength of BFRC increases by... |
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| Keywords: | basalt fiber reinforced concrete(BFRC) proportion mechanical properties toughening mechanism |
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