矿粉填料细观特征对沥青胶浆低温黏结强度的影响分析  

The Analysis of the Impact of Mesoscopic Characteristics of Mineral Powder Filler on Cohesive Strength of Asphalt Mortar at Low Temperature

作　　者：李科瑶 郑传峰[1] 田海波 

机构地区：[1]吉林大学建设工程学院,长春市130026 [2]吉林省交通建设集团,长春市130021

出　　处：《公路》2015年第1期144-148,共5页Highway

基　　金：吉林大学基本科研费资助;项目编号450060445202;吉林省交通厅科研项目资助;项目编号3R1128954424

摘　　要：测试矿粉填料的细观特征,基于沥青拉伸黏结强度测试技术分析其对沥青胶浆低温黏结强度的影响效果。采用BT-1600颗粒图像分析系统测试矿粉细观级配、颗粒长径比、比表面积、颗粒圆形度,采用无压水浸润的方法测试矿粉细观空隙特征。试验结果表明:尽管3种矿粉初筛结果基本一致,但是由于3种矿粉的细观特征存在差异,导致3种沥青胶浆的低温黏结强度也有较大不同。以矿粉细观空隙特征为中间媒介,基于沥青胶浆中结构沥青与自由沥青比例特性,明确矿物填料细观粉体特征对沥青胶浆低温黏结强度的影响机理。The mesoscopic characteristics of mineral powder filler are tested, and its impact on cohesive strength of asphalt mortar at low temperature is analyzed on the basis of the asphalt tensile cohesive strength testing technology. BT-1600 particle image analysis system is used to test the mesoscopic grading, length to diameter ratio, specific surface area and circular degree of mineral powder filler. Infiltration of free-pressure water is applied to test mesoscopic void characteristics. The results show that differences in mesoscopic characteristics of the three types of mineral powder filler lead to the significantly differed low-temperature cohesive strength, though the results of preliminary screening are almost the same. Using mesoscopic void characteristics of mineral powder filler as intermediaries and on the basis of the proportions of fixed asphalt and free asphalt, the impact of mesoscopic characteristics of mineral powder filler on low--temperature cohesive strength of asphalt mortar can be defined.

关 键 词：沥青胶浆 矿粉填料 细观特征 黏结强度 

分 类 号：U414.01[交通运输工程—道路与铁道工程]