首页|轻度解交联橡胶粉干法改性SMA13性能研究

轻度解交联橡胶粉干法改性SMA13性能研究

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

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郑成强、李竞晨、朱宏喜、曹卫东、张保民

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山东高速工程咨询集团有限公司青岛分公司,山东青岛 266114

山东大学齐鲁交通学院,山东济南 250002

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

山东省交通运输科技计划项目

2022B80

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
年,卷(期):2024.51(7)