玄武岩纤维对早强混凝土早期动力特性的影响研究

Bulletin of the Chinese ceramic society(2015)

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Abstract
首先制备了玄武岩纤维体积掺量为0.2%的早强混凝土和不加纤维的早强混凝土,之后采用φ100 mm分离式霍普金森压杆(SHPB)试验装置对养护龄期为3d的两种混凝土在不同应变率等级下的动力特性进行对比研究.结果表明,早强混凝土(ESC)和玄武岩纤维早强混凝土(BFESC)的抗压强度与峰值韧度体现出显著的应变率相关性;在50 ~ 150 s-1应变率范围内玄武岩纤维对早强混凝土的动态抗压强度和韧性提高明显;用峰值韧度表征韧性时,应变率77 s-1和100 s-1下,峰值韧度增幅达到36.67%和35.33%.
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Key words
early strength concrete,basalt fiber,early stage dynamic property
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