长沙理工大学学报（自然科学版）2023，Vol.20Issue(6)：91-99,9.DOI:10.19951/j.cnki.1672-9331.20220417001
半开级配SBS改性沥青混合料BK-7组成设计
Composition design of semi-open grade SBS modified asphalt mixture BK-7
摘要
Abstract
[Purposes]This work aims to demonstrate the semi-open graded asphalt mixture BK-7 with a nominal maximum particle size of 7 mm.[Methods]In this paper,the mineral composition formulation of BK-7 mixture was designed.The amount of SBS modified asphalt was determined by Schellenberg leakage test and Kantabaugh flying test when the fiber content was 0.4%.Uniaxial penetration test,low temperature bending test and Marshall stability test of BK-7 mixture with 9%,11%and 13%porosity were carried out,and the corresponding properties of BK-7 mixture were compared with those of SMA-5,AC-5 and OGFC-5.At the same time,flying and Marshall tests were carried out on BK-7 mixture with 11%porosity soaked in acid solution.[Findings]Among the three kinds of BK-7 mixture,the BK-7 mixture with 9%porosity has the best road performance and the best rutting resistance,and its low temperature crack resistance and water stability are comparable to those of SMA-5 and AC-5 asphalt mixture.After soaking in acid rain solution with pH=4 for 2 cycles("Soaking for 7 days,natural drying for 1 day"for 1 cycle),the Marshall stability of BK-7 mixture with 11%porosity and the flight loss of Fort Kenta could meet the corresponding specification requirements.[Conclusions]The road performance of BK-7 asphalt mixture with 9%porosity of SBS modified asphalt mixed with fiber has comparative advantages,and it has certain engineering application value in South China where exhibits a high-temperature climate throughout a year.关键词
道路工程/SBS改性沥青/纤维/半开级配/路用性能Key words
road engineering/SBS modified asphalt/fiber/semi-open gradation/road performance分类
交通工程引用本文复制引用
关宏信,周直霖,覃婉菊,李兵,杨涛..半开级配SBS改性沥青混合料BK-7组成设计[J].长沙理工大学学报（自然科学版）,2023,20(6):91-99,9.基金项目
国家自然科学基金资助项目(52078062) （52078062）
湖南省自然科学基金项目(2020JJ4604) （2020JJ4604）
湖南省交通运输地方标准制修订项目(B201806) Project(52078062)supported by the National Natural Science Foundation of China （B201806）
Project(2020JJ4604)supported by Natural Science Foundation of Hunan Province （2020JJ4604）
Project(B201806)supported by Hunan Provincial Transportation Local Standards Revision Project （B201806）
