石灰岩与玄武岩粗集料抗压耐磨性能对比试验研究

发布时间：2018-01-15 00:11

本文关键词：石灰岩与玄武岩粗集料抗压耐磨性能对比试验研究　出处：《公路工程》2014年03期 　论文类型：期刊论文

【摘要】：为了探讨石灰岩粗集料在沥青路面表层中的适用性及耐久性,通过采用压碎试验仪、冲击试验仪和洛杉矶磨耗试验机在分别改变压力增加速率及压实功、改变冲击功和改变钢球数量质量及转动置数条件下依次对比研究了石灰岩与玄武岩粗集料的压碎值、冲击值和磨耗值,并分析了各性能衰减规律。结果表明:石灰岩粗集料的抗压性能、抗冲击性能和耐磨耗性能均较玄武岩稍差,且衰减较快;抗压碎能力与荷载压力、抗冲击能力与冲击次数以及磨耗损失与转动置数之间均呈二次曲线相关关系;冲击值、磨耗值与压碎值之间均有较好线性关系。
[Abstract]:In order to discuss the applicability and durability of limestone coarse aggregate in the surface layer of asphalt pavement, the pressure increasing rate and compaction work were changed by using crushing tester, impact tester and Los Angeles abrasion tester respectively. The crushing value, impact value and wear value of coarse aggregate of limestone and basalt are studied in turn under the condition of changing the impact energy and the quantity and quality of steel ball. The results show that the compressive, impact and wear resistance of the coarse limestone aggregate are slightly worse than those of the basalt, and the attenuation is faster than that of the basalt. The relationship between crushing capacity and load pressure, impact resistance and times of impact, wear loss and rotation number is conic. There is a good linear relationship between impact value, wear value and crushing value.
【作者单位】：广东能达高等级公路维护有限公司;
【分类号】：U414.1
【正文快照】： 0前言粗集料是沥青混合料的重要组成部分,尤其是路面表层粗集料,不仅要受到各种自然环境的作用,还要承受车辆荷载的巨大压力和冲击以及轮胎的长期摩擦作用,这对集料本身的力学性能提出了较高要求[1~3]。在选择沥青路面表层粗集料时,玄武岩[4]和辉绿岩等力学性能指标较好的石料

【参考文献】