轻度解交联橡胶粉干法改性SMA13性能研究

Study on performance of SMA13 modified by low-degree decrosslinking crumb rubber based on dry process method

郑成强 ¹李竞晨 ²朱宏喜 ¹曹卫东 ²张保民¹

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作者信息

1. 山东高速工程咨询集团有限公司青岛分公司,山东青岛 266114
2. 山东大学齐鲁交通学院,山东济南 250002
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摘要

通过沥青混合料车辙试验、小梁弯曲试验、冻融劈裂及浸水马歇尔试验,研究了不同掺量轻度解交联橡胶粉(LDCR)对干法改性SMA13高温性能、低温性能与水稳定性的影响.结果表明,掺入LDCR提高了 SMA13的高温性能,尤其当掺量≥2％时,混合料的动稳定度超过4.5％SBS改性SMA13(对照组);2％掺量的LDCR干法改性SMA13低温抗裂性最优;总体上LDCR干法改性SMA13的水稳定性低于对照组.综合考虑,LDCR的最佳掺量为2％,与对照组相比,可降低材料成本约5％.

Abstract

The high-temperature performance,low-temperature performance,and water stability of dry process modified SMA13 with varying dosages of low-degree Decrosslinked Crumb Rubber(LDCR)were assessed through several indoor tests,including the rutting test,the low-temperature bending tests,the freeze-thaw splitting test and the immersion Marshall test.These tests compare the modified SMA 13 with a 4.5％SBS-modified SMA13(the reference group).The findings indicate that incorporation of LDCR markedly enhances the high-temperature properties of SMA13,particularly when the LDCR content is 2％or higher,at which point the dynamic stability value of the mixture surpasses that of the reference group.At low temperatures,the SMA13 modified with a 2％dosage of LDCR demonstrates superior crack resistance.In general,water stability of LDCR-modified SMA13 is below that of the reference group.Comprehensive considering,a 2％dosage of LDCR is recommended for optimal modification of SMA13,poten-tially reducing material costs by approximately 5％.

关键词

轻度解交联橡胶粉/干法改性SMA13/沥青玛蹄脂碎石混合料/路用性能

Key words

low-degree decrosslinking crumb rubber/dry process modified SMA13/stone matrix asphalt/road performance

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基金项目

山东省交通运输科技计划项目(2022B80)

出版年

2024

新型建筑材料

中国新型建筑材料工业杭州设计研究院

新型建筑材料

CSTPCD

影响因子：0.569

ISSN：1001-702X

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