摘要
文中对掺加铁尾矿砂的微表处混合料的耐久性进行试验研究,主要通过负荷车辙试验、半圆弯曲(SCB)试验、湿轮磨耗试验和旋转瓶磨耗试验对不同铁尾矿砂用量、级配类型、集料类型和乳化沥青类型的微表处混合料进行试验研究.结果表明:采用石灰岩作为集料时添加一定量的铁尾矿砂能够提高微表处混合料的高温性能、低温性能、耐磨耗性能及水稳定性,但存在最优用量(15%).玄武岩集料中加入铁尾矿砂后,混合料的高温性能、低温性能、耐磨耗性能和水稳定性均产生不同程度的下降.水性环氧改性乳化与SBS和SBR改性乳化沥青微表处混合料相比有更优异的高温和低温性能、耐磨耗性能和水稳定性;采用MS-3型级配时微表处混合料较MS-2的耐久性更加优异.
The durability of micro-surfacing mixture mixed with iron tailings was studied experimentally. Through the main load rutting test, SCB test, wet wheel abrasion test and rotary bottle abrasion test, the micro-surfacing mixture with different iron tailings sand content, gradation type, aggregate type and emulsified asphalt type was tested and studied. The results show that when limestone is used as aggregate, adding a certain amount of iron tailings sand can improve the high-temperature performance, low-temperature performance, wear resistance and water stability of micro-surfacing mixture, but there is an optimal amount(15%). After adding iron tailings into basalt aggregate, the high-temperature performance, low-temperature performance, wear resistance and water stability of the mixture all decrease in different degrees. Compared with SBS and SBR modified emulsified asphalt micro-surfacing mixture, waterborne epoxy modified emulsified asphalt has better high and low temperature performance, wear resistance and water stability. When MS-3 gradation is adopted, the durability of micro-surfacing mixture is better than that of MS-2.
作者
邹宗民
苏纪壮
汲平
王鑫洋
高国华
王业飞
ZOU Zongmin;SU Jizhuang;JI Ping;WANG Xinyang;GAO Guohua;WANG Yefei(Construction Management Company of Shandong High-speed Group Co.Ltd.,Jinan 250101,China;Shandong High-speed Engineering Inspection Co.Ltd.,Jinan 250002,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2022年第5期922-927,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
山东省交通运输厅科技项目(2019B41)。
关键词
道路工程
铁尾矿
乳化沥青
微表处混合料
耐久性
road engineering
iron tailings
emulsified asphalt
micro-surface mixture
durability
