摘要
针对目前冷拌沥青混合料没有统一的配合比设计方法这一问题,从成型和养生方式、级配类型和填料掺量等方面进行试验设计,研究冷拌料的强度变化规律,从而提出合适的配合比设计参数.结果表明:冷拌料中水的存在是影响其强度形成的关键,因此在室内试验和现场施工中需严格控制其总的用水量;掺入水泥能够显著提高冷拌料的初始强度,从经济性和综合性能上考虑,建议水泥掺量控制在1.5%-2%;相对间断级配而言,密级配冷拌料具有更高的初始强度.同时建议分两次击实成型试件,击实总次数为75次,烘箱养生温度控制为40℃,以保证室内试验更好的模拟实际固化的环境条件.
Considering that there is no uniform mix design method for cold mix asphalt mixture at present,experimental design was carried out from the aspects of forming and curing methods,grading types and filler content.The change rule of strength of cold mix was studied,and the appropriate mix design parameters were put forward.The results show that the existence of water in cold mix is the key to its strength formation,so it is necessary to strictly control its total water consumption in indoor test and field construction.Adding cement can significantly improve the initial strength of cold mix.Considering economy and comprehensive performance,it is suggested that the content of cement should be controlled at 1.5%-2%.Compared with discontinuous gradation,dense gradation cold mix has higher initial strength.At the same time,it is suggested that the specimen should be compacted twice,the total number of compaction is 75 times,and the curing temperature of the oven should be controlled at 40℃ to ensure that the indoor test can better simulate the environmental conditions of actual curing.
作者
徐文
文正
张恺
蔡宏庆
韩涵
汪铭康
XU Wen;WEN Zheng;ZHANG Kai;CAI Hongqing;HAN Han;WANG Mingkang(School of Transportation,Wuhan University of Technology,Wuhan 430063,China;Jiangxi Transportation Institute,Nanchang 330200,China;Guangzhou ZhiTong Engineering Technology Co.Ltd.,Guangzhou 510000,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2021年第2期342-346,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
武汉理工大学国家级大学生创新创业训练计划(S201910497017)
江西省交通运输厅科技项目(2014Y0015,2015H0036)。
