钢纤维沥青混凝土裂缝自愈能力试验研究

发布时间：2018-01-11 16:01

本文关键词：钢纤维沥青混凝土裂缝自愈能力试验研究　出处：《公路》2015年12期 　论文类型：期刊论文

【摘要】：通过沥青胶浆和钢纤维沥青胶浆温度裂缝形态的对比,研究了钢纤维对沥青胶浆裂缝开展的控制作用,通过不同温度下不同钢纤维掺量的沥青混凝土试件经弯曲断裂后裂缝自愈能力的系列试验,研究了温度、钢纤维掺量和自愈期长度对沥青混凝土自愈能力的影响规律。结果表明,钢纤维可改善温度裂缝的开展形态,由少缝开裂变为多缝开裂;温度对沥青混凝土的自愈能力具有决定作用,钢纤维对沥青混凝土裂缝的自愈能力具有显著的改善作用,钢纤维对沥青混凝土自愈能力的改善效果来自对抗裂能力的提高;自愈期长度也是影响沥青混凝土自愈能力的重要因素,二者之间呈线性关系。并根据试验结果建立了考虑温度及钢纤维影响的裂缝自愈能力预估模型。
[Abstract]:Through the comparison of temperature crack morphology between asphalt mortar and steel fiber asphalt slurry, the control effect of steel fiber on the crack development of asphalt mortar was studied. The temperature of asphalt concrete specimens with different steel fiber content at different temperature was studied by series tests of crack healing ability after bending fracture. The effect of steel fiber content and length of self-healing period on the self-healing ability of asphalt concrete is studied. The results show that steel fiber can improve the shape of temperature crack and change from less joint crack to multi-joint crack. Temperature has a decisive effect on the self-healing ability of asphalt concrete, and steel fiber has a significant effect on improving the self-healing ability of asphalt concrete crack. The improvement effect of steel fiber on the self-healing ability of asphalt concrete comes from the improvement of anti-cracking ability. The length of self-healing period is also an important factor affecting the self-healing ability of asphalt concrete, and the relationship between them is linear. According to the test results, the prediction model of crack self-healing ability considering the influence of temperature and steel fiber is established.
【作者单位】：郑州大学土木工程学院;新型城镇建筑技术河南省协同创新中心;郑州大学水利与环境学院;郑州大学力学与工程科学学院;
【基金】：河南省教育厅科学技术研究重点项目,项目编号13B560373
【分类号】：U414
【正文快照】： 裂缝是沥青混凝土路面的主要破坏形式之一,严重影响了公路的正常运行,甚至带来巨大经济损失。自1967年Bazin和Saunier用试验证明沥青混凝土具有自愈能力以来[1],沥青混凝土路面的自愈行为逐渐引起科研人员的关注[2 8],然而,沥青的自愈能力对控制裂缝还是十分有限的,因此,有必

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