摘要
高延性纤维混凝土(HDFC)具有良好的裂缝控制能力、高强度和韧性。采用硫酸盐-干湿循环试验方法对HDFC试件进行了侵蚀试验,研究其抗侵蚀性能。试验对30个(10组) HDFC立方体试件进行单轴受压试验,测定不同硫酸盐侵蚀次数后HDFC的表观特征以及各项基本力学性能,包括极限承载力、峰值应变和裂缝状态。试验结果表明,经过150次硫酸盐侵蚀后HDFC具有良好的裂缝控制能力,试件出现较少的细密裂纹,表现出良好的抗侵蚀性能。通过分析HDFC应力-应变曲线,得到HDFC干湿循环本构模型曲线,与试验曲线对比发现,本构模型曲线与试验曲线较为吻合。
High ductility fiber concrete( HDFC) has good crack control ability,high strength and toughness. The sulfate-dry-wet cyclic test method was used to study the corrosion resistance of HDFC specimens. Ten groups of 30 HDFC cube specimens were tested under uniaxial compression. The apparent characteristics and basic mechanical properties of HDFC after different sulfate erosion times were measured,including ultimate bearing capacity,peak strain and crack state.The test results show that HDFC has good crack control ability after 150 times of sulfate erosion,the specimens have fewer fine cracks and shows good corrosion resistance performance. By analyzing the stress-strain curve of HDFC,the constitutive model curve of dry-wet cycle of HDFC was obtained. Compared with the experimental curve,it is found that the constitutive model curve is in good agreement with the experimental curve.
引文
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