石灰岩与玄武岩混合粗集料性能试验研究

发布时间：2018-01-13 06:26

本文关键词：石灰岩与玄武岩混合粗集料性能试验研究　出处：《公路》2014年01期 　论文类型：期刊论文

【摘要】：为研究抗滑性能不足的地方石料——石灰岩碎石应用于抗滑表层混合料的可行性,将其与玄武岩碎石掺配混合,分别进行了不同掺配比例下的主要物理、力学指标试验。结果表明:(1)随玄武岩碎石掺配比例的增加,石灰岩与玄武岩混合粗集料的密度线性增长,吸水率、压碎值、磨耗值线性下降,磨光值以掺入量50%为分界点分区间线性提高;(2)当玄武岩掺入量≥30%,混合粗集料的主要性能指标满足规范要求,将其应用于抗滑表层混合料中具有工程可行性;(3)混合粗集料间的"磨光自补偿"功能有利于延长抗滑表层抗滑性能的维持年限。研究成果为石灰岩与玄武岩混合掺配的粗集料在沥青混凝土路面抗滑表层工程中的使用提供了有力试验支撑。
[Abstract]:In order to study the feasibility of the application of the local stone-limestone crushed stone with insufficient skid resistance to the anti-slide surface mixture, the mixture was mixed with the basalt macadam, and the main physics under different mixing ratio was carried out respectively. The results show that the density of coarse aggregate mixed with limestone and basalt increases linearly with the increase of the proportion of basalt crushed stone, and the water absorption rate, crushing value and wear value decrease linearly. The grinding value is linearly increased with the addition of 50% as the dividing point. 2) when the amount of basalt is more than 30%, the main performance indexes of the mixed coarse aggregate meet the requirements of the specification, and it is feasible to apply it to the anti-skid surface mixture; 3). "polishing self-compensation" between mixed coarse aggregates. The research results provide a strong test support for the use of coarse aggregate mixed with limestone and basalt in the anti-skid surface engineering of asphalt concrete pavement.
【作者单位】：西南交通大学土木工程学院;西南交通大学道路工程四川省重点实验室;四川纳黔高速公路有限责任公司;中铁二院工程集团有限责任公司;
【基金】：四川省交通厅科技项目,项目编号SC2008.1-3-1 中央高校基本科研业务费专项资金项目,项目编号SWJTU12ZT05
【分类号】：U414
【正文快照】： 目前西南地区高速公路的建设已逐渐向偏远山区发展,而这些山区石料资源十分丰富。为带动地方经济的发展,如何应地制宜地利用地方石料是工程急需解决的问题。由于山区山高坡陡、地形复杂,在路线工程中连续长大纵坡在所难免。因此,为保证行车安全,沥青混凝土路面的表层结构常采

【参考文献】