| 粗橡胶粉SBS改性沥青透水混合料抗水损害性能 |
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| 引用本文： | 肖飞鹏,宗启迪,王金刚,陈军,刘继.粗橡胶粉SBS改性沥青透水混合料抗水损害性能[J].西南交通大学学报,2021,56(4):839-846. |
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| 作者姓名： | 肖飞鹏 宗启迪 王金刚 陈军 刘继 |
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| 基金项目： | 国家自然科学基金（51808404） |
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| 摘 要： | 排水沥青混凝土孔隙率大，具有良好的排水、降噪功能，但是易发生水损害. 使用粗橡胶粉和SBS（styrene-butadiene-styrene block copolymer）改性剂对基质沥青进行复合改性. 采用冻融劈裂强度比对透水沥青混合料的抗水损害性能进行评价. 研究SBS用量、最大公称粒径、粗橡胶粉用量、级配各筛孔通过率、消石灰用量和沥青用量6个影响因素对透水沥青混凝土抗水害损性能的影响，揭示粗橡胶粉SBS复配沥青混合料的抗水损害机理. 研究结果表明:SBS用量的增加、集料最大公称粒径的增大、消石灰的加入均能提高透水混合料的冻融劈裂强度比；为了获得最佳的水稳定性和良好的经济性，建议SBS与粗橡胶粉的最佳掺量分别为6%和10%，并且通过灰关联分析得出了影响各规格混合料抗水损害性能的关键筛孔.
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| 关 键 词： | 水稳定性 冻融劈裂试验 透水沥青混凝土 粗橡胶粉SBS复配改性沥青 参数优化 抗水损害机理 |
| 收稿时间： | 2019-12-11 |
Moisture Susceptibility of SBS and Coarse Crumb Rubber Composite Modified Asphalt Permeable Mixture |
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| XIAO Feipeng,ZONG Qidi,WANG Jingang,CHEN Jun,LIU Ji.Moisture Susceptibility of SBS and Coarse Crumb Rubber Composite Modified Asphalt Permeable Mixture[J].Journal of Southwest Jiaotong University,2021,56(4):839-846. |
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| Authors: | XIAO Feipeng ZONG Qidi WANG Jingang CHEN Jun LIU Ji |
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| Abstract: | Permeable asphalt concrete (PAC) possesses good capacity of drainage and noise reduction due to its large porosity. Nevertheless, it is prone to suffer water damage. Coarse crumb rubber (CCR) and styrene-butadiene-styrene block copolymer (SBS) were used to prepare composite modified asphalt. Freeze-thaw splitting tensile strength ratio (TSR) was employed to evaluate the moisture susceptibility of PAC. The influences of the contents of SBS, coarse crumb rubber, asphalt binder, and hydrated lime as well as the nominal maximum particle size (NMPS) and passing percentage of key sieve sizes on the moisture susceptibility of PAC were explored to reveal the moisture damage resistance mechanism of SBS and CCR composite modified asphalt (SBS/CRMA) mixture. The results indicate that the increases in SBS content, the NMPS of aggregates, and the addition of slaked lime can effectively increase the TSR value. To optimize moisture susceptibility and cost efficiency, it is recommended that the favorable contents of SBS and CCR are 6% and 10%, respectively. Moreover, through grey relational analysis, the key sieve sizes that affect the moisture susceptibility of permeable asphalt mixtures with various NMPS were presented as well. |
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