钢渣 / 煤矸石粉对沥青混合料路用性能的影响

金属矿山 ›› 2025, Vol. 55 ›› Issue (8): 289-297.

钢渣 / 煤矸石粉对沥青混合料路用性能的影响

赵　涛¹ 　袁化强¹ 　王欣宇¹ 　李博文¹ 　惠迎新^1,2

1. 宁夏大学土木与水利工程学院,宁夏银川 750021;2. 宁夏交通建设股份有限公司,宁夏银川 750021

出版日期:2025-09-15 发布日期:2025-09-16
通讯作者: 惠迎新(1985—),男,教授,博士,博士研究生导师。
作者简介:赵　涛(2004—),男,本科。
基金资助:
宁夏回族自治区重点研发计划项目(编号:2024BEG02041);宁夏回族自治区重点研发计划引才专项(编号:2024BEH04052)。

Effect of Steel Slag / Gangue Powder on Road Performance of Asphalt Mixtures

ZHAO Tao ¹ 　 YUAN Huaqiang ¹ 　 WANG Xinyu ¹ 　 LI Bowen ¹ 　 HUI Yingxin ^1,2

1. School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China; 2. Ningxia Communications Construction Co. ,Ltd. ,Yinchuan 750021,China

Online:2025-09-15 Published:2025-09-16

摘要/Abstract

摘要： 为了给钢渣粉和煤矸石粉在沥青混合料中的推广应用提供科学依据,通过高温车辙、浸水马歇尔、冻融劈裂、低温弯曲等试验分别研究了不同掺量(0%、25%、50%、75%、100%)的钢渣粉和煤矸石粉对 SMA-13 沥青混合料路用性能的影响,并结合 SEM 和 XRD 揭示了强度形成机制。结果表明,沥青混合料的物理力学指标(空隙率、稳定度、流值)均随着钢渣粉和煤矸石粉掺量的增加呈上升趋势;钢渣粉与煤矸石粉掺量的增加,SMA-13 沥青混合料高温稳定性先提升后略有下降,当掺量为 75%时,高温稳定性最佳,动稳定度提高 25. 7 个百分点;提高混合料中煤矸石粉或钢渣粉掺量,SMA-13 沥青混合料的水稳定性能逐步提高,但低温抗裂性略有下降,100%掺量沥青混合料的残留稳定度和残留强度比分别提高约 4. 5 个百分点和 5. 5 个百分点,而最大破坏应变由 2 861 με 降低为 2 721 με,但仍能满足现行规范中破坏应变≥2 000 με 的要求。微观表征证实,钢渣/ 煤矸石粉对混合料性能的改善作用源于其独特的微观形貌、活性化学成分及优化的矿物组成,这些因素共同促进了沥青-集料界面的粘结性能与整体力学强度的提升。

关键词: 沥青混合料　钢渣粉　煤矸石粉　高温稳定性　水稳定性　低温抗裂性

Abstract: In order to provide a scientific basis for the promotion and application of steel slag powder and coal gangue powder in asphalt mixtures,high-temperature rutting,water immersion Marshall,freeze-thaw splitting,and low-temperature bending tests were conducted to investigate the effects of different addition dosage (0%,25%,50%,75%,100%) of steel slag powder and coal gangue powder on the performance of SMA-13 asphalt mixtures,and SEM and XRD analyses were used to reveal the strength formation mechanisms. The results indicated that the physical and mechanical properties of the asphalt mixture (void ratio,stability,flow value) all show an upward trend with increasing steel slag powder and coal gangue powder content; As the content of steel slag powder and coal gangue powder increases,the high-temperature stability of SMA-13 asphalt mixture first improves and then slightly decreases. When the content reaches 75%,the high-temperature stability is optimal,with the dynamic stability improving by 25. 7 percentage points;Increasing the content of coal gangue powder or steel slag powder in the mixture gradually improves the water stability of SMA-13 asphalt mixture,but the low-temperature crack resistance slightly decreases;At a 100% content,the residual stability and residual strength ratios of the asphalt mixture increased by approximately 4. 5 percentage points and 5. 5 percentage points,respectively,while the maximum failure strain decreased from 2 861 με to 2 721 με,but still met the current standard requirement of failure strain ≥2 000 με. Microscopic characterization confirms that the improvement in mixture performance attributed to steel slag / coal gangue powder stems from its unique microscopic morphology,active chemical components,and optimized mineral composition. These factors collectively enhance the bonding performance at the asphalt-aggregate interface and the overall mechanical strength of the mixture.

Key words: asphalt mixture,steel slag powder,gangue powder,high temperature stability,water stability,low temperature cracking resistance

中图分类号:

TU535

赵　涛　袁化强　王欣宇　李博文　惠迎新, . 钢渣 / 煤矸石粉对沥青混合料路用性能的影响 [J]. 金属矿山, 2025, 55(8): 289-297.

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