基于沥青砂浆路用性能的细集料级配
Research on Fine Aggregate Gradationbased on Asphalt Mortar Road Performance
梁庭熹 1许新权 2谢光宁2
作者信息
- 1. 广东惠清高速公路有限公司,广东 广州 510623
- 2. 广东交科技术研发有限公司,广东 广州 510550;广东华路交通科技有限公司,广东 广州 510420
- 折叠
摘要
为了优化细集料级配,采用变I法计算多种细集料级配.借助贝雷法检验级配的嵌挤效果.成型沥青混合料试件,分别进行单轴贯入试验和低温劈裂试验.试验结果表明:随着I值增大,砂浆级配变细,抗剪能力与低温抗拉能力均先增大、后减少.考虑在提高沥青砂浆抗剪能力的同时不至于过度削弱其低温抗裂性,建议适宜的I值为0.68,此时沥青砂浆的抗剪能力与抗裂能力均较优.
Abstract
In order to optimize the gradation of fine aggregate,the variable I method has been used to calculate various fine aggregate gradations.The embedding effect of the gradation has been tested using the Bailey method,and asphalt mixture specimens have been formed.Uni-axial penetration tests and low-temperature splitting tests have been conducted respectively.The experimental results have shown that as the I value increases,the mortar grading becomes finer,the shear resistance and low-temperature tensile strength first increase and then decrease.Considering improving the shear resistance of asphalt mortar while not excessively weakening its low-temperature crack resistance,it has been recommended to have an appropriate I value of 0.68,at which,the shear and crack resistance of asphalt mortar are relatively superior.
关键词
沥青砂浆/路用性能/细集料/级配Key words
asphalt mortar/road performance/fine aggregate/gradation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据