高掺量废旧橡胶环氧树脂混凝土性能的试验研究  

Experimental Study on Performance of Epoxy Resin Concrete with High Content of Waste Rubber

作　　者：舒兴旺[1] SHU Xing-wang(National and Local Joint Engineering Laboratory of New Materials for Road, Shanxi Transport Research Institute, Taiyuan Shanxi 030006, Chin)

机构地区：[1]山西省交通科学研究院新型道路材料国家地方联合工程实验室,山西太原030006

出　　处：《公路交通科技》2018年第7期15-21,共7页Journal of Highway and Transportation Research and Development

基　　金：山西省交通运输厅科研计划项目(2015-1-24);山西省专利推广实施资助项目(20171014)

摘　　要：为了考察废旧橡胶环氧树脂混凝土(Waste Rubber Epoxy Resin Concrete,简称WRERC)的性能,探讨其作为路面修复材料的可行性,采用废旧橡胶等体积替代砂石集料制备了高掺量(0-50%)WRERC,研究了废旧橡胶掺量对WRERC孔隙率、力学性能和冻融耐久性的影响。试验结果表明:随着橡胶掺量增大,WRERC孔隙率在掺量低于30%时逐渐增大而后趋于稳定,抗压强度呈近似线性降低,抗压极限应变在掺量低于40%时基本保持不变而后显著增大,抗压应力-应变曲线逐渐趋于平缓,柔性因子增大。冻融试验结果表明,经300次冻融循环,WRERC外观保持完好,未出现裂缝或胶凝材料剥落现象,基本没有质量损失;橡胶掺量增大和冻融次数增加对WRERC抗压应力-应变曲线作用效果相似,均使曲线趋于平缓,峰值应力降低,峰值应变增大,弹性区和塑性区延长;随着冻融循环次数增加,WRERC抗压强度损失率和柔性因子均增大,且橡胶掺量越高,作用效果越明显;橡胶掺量和冻融次数双重作用致使WRERC力学性能劣化,且橡胶掺量影响更大。建议高掺量WRERC可用于非机动车道、停车场、步行街、跑道等场所的铺装修复以及通过降低孔隙率来提升其耐冻融性能。In order to investigate the property of waste rubber epoxy resin concrete（ WRERC） and discuss the feasibility of its application as pavement repair material,the high rubber content（0 ~ 50%） WRERC is prepared by using waste rubber substitute for equal volume sand and gravel aggregate. The influence of waste rubber content on porosity,mechanical property and freezing durability of WRERC is studied. The test result shows that（1） when the waste rubber content below 30%,as the rubber content increased,the porosity of WRERC increased gradually then tended to be stable and its compressive strength decreases linearly;（2） the ultimate compressive strain remained unchanged when the content below 40% and then increased significantly,the compressive stress-strain curve tended to be flat,and ductility factor increased. The freezethaw test result shows that（1） after 300 freeze-thaw cycles,WRERC keeps intact with no cracks or spalling of cementing material,and no quality loss basically;（ 2） the effect of rubber content and the freeze-thaw cycles increase on the compressive stress-strain curve of WRERC are similar,both of them made the curveflat,the peak stress decreased,the peak strain increased,the elastic zone and plastic zone extended;（3）with the increase of freeze-thaw cycles,the compressive strength loss rate and the flexible factor of WRERC are increased,the higher the rubber content,the more obvious the effect;（4） the effect both rubber content and freeze-thaw cycles contributed to the degradation of WRERC mechanical behavior,to which rubber content contributes more. It is suggested that WRERC with high content waste rubber can be used in nonmotor vehicle lanes,parking lots,pedestrian streets,tracks and other places as pavement repair material,and to improve the freeze-thaw durability of WRERC by reducing porosity.

关 键 词：道路工程 力学性能 冻融耐久性 环氧树脂混凝土 废旧橡胶 路面修复 

分 类 号：U416.218[交通运输工程—道路与铁道工程]