Performance of Stone Matrix Asphalt Modified with Crumb Rubber and Fibres

IF 1 Q4 ENGINEERING, CIVIL Jordan Journal of Civil Engineering Pub Date : 2023-10-01 DOI:10.14525/jjce.v17i4.08

G. Shiva Kumar

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Abstract

This article investigates the impact of Crumb Rubber Modified Bitumen (CRMB) and fibre additives (aramid fibre and basalt fibre) on the performance properties of Stone Matrix Asphalt (SMA) mixtures. Tests were conducted to evaluate mix design, draindown, cantabro loss, moisture sensitivity, rutting resistance and fatigue behavior. The Marshall method, the draindown parameters (ASTM D6390-11) and the cantabro loss characteristics (ASTM D 7064) were used to examine the mix design qualities. The modified Lottman test was used to assess the moisture sensitivity of SMA mixes. The roller compactor cum rut analyzer was used to assess rutting resistance. Findings showed that CRMB and fibre additives effectively controlled binder draindown and minimized abrasion loss in SMA mixtures. SMA-CRMB mixtures had higher draindown, but comparable cantabro loss than SMA-AF and SMA-BF mixtures. Incorporating CRMB and fibre additives enhanced moisture sensitivity, rutting resistance and fatigue behavior. SMA mixtures with 0.3% fibre addition displayed similar performance properties to SMA with CRMB. Further, substituting fibre additions for CRMB in SMA combinations may yield similar performance. KEYWORDS: Stone matrix asphalt, Crumb rubber-modified bitumen, Fibre additives, Draindown, Cantabro loss, Moisture sensitivity, Rutting resistance, Fatigue behaviour.

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橡胶屑和纤维改性石基沥青的性能研究

研究了橡胶屑改性沥青(CRMB)和纤维添加剂(芳纶纤维和玄武岩纤维)对石基沥青(SMA)混合料性能的影响。试验评估了混合料设计、排水、番茄损失、水分敏感性、车辙抗性和疲劳性能。采用马歇尔法、漏降参数(ASTM D6390-11)和cantabro损失特性(ASTM D 7064)来检验混合料设计质量。采用改进的Lottman试验评估SMA混合料的水分敏感性。采用碾压机和车辙分析仪对车辙阻力进行评估。研究结果表明，CRMB和纤维添加剂有效地控制了SMA混合物中的粘结剂流失，并将磨损损失降至最低。与SMA-AF和SMA-BF混合物相比，SMA-CRMB混合物具有更高的排干量，但与之相当的番茄损失。加入CRMB和纤维添加剂增强了湿气敏感性，抗车辙性和疲劳性能。添加0.3%纤维的SMA混合物与添加CRMB的SMA具有相似的性能。此外，在SMA组合中替换CRMB的纤维添加剂可能会产生类似的性能。关键词:石基沥青，橡胶改性沥青，纤维添加剂，排水，Cantabro损失，湿度敏感性，车辙抗性，疲劳性能。

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来源期刊

Jordan Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

2.10

自引率

27.30%

发文量

期刊介绍： I am very pleased and honored to be appointed as an Editor-in-Chief of the Jordan Journal of Civil Engineering which enjoys an excellent reputation, both locally and internationally. Since development is the essence of life, I hope to continue developing this distinguished Journal, building on the effort of all the Editors-in-Chief and Editorial Board Members as well as Advisory Boards of the Journal since its establishment about a decade ago. I will do my best to focus on publishing high quality diverse articles and move forward in the indexing issue of the Journal.