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Characterisation of cement grouted bituminous mixes using marginal aggregates
Road Materials and Pavement Design ( IF 3.4 ) Pub Date : 2020-10-22 , DOI: 10.1080/14680629.2020.1828152
Supratim Kaushik 1 , Anjan Kumar Siddagangaiah 2
Affiliation  

This study details the results of a laboratory study conducted to evaluate the properties of cement grouted bituminous mixes (CGBM) prepared with marginal aggregates. A conventional dense-graded bituminous concrete mix was also considered for the purpose of comparison. The CGBM specimens prepared were then evaluated in terms of its strength (Stability and Indirect Tensile strength), Elastic properties (Resilient modulus and Indirect Tensile Stiffness Modulus), Durability (Tensile strength ratio) and ravelling resistance (Cantabro Abrasion Test). Testing was conducted at two different curing periods (7 and 28 days) to consider the long-term strength gain of cement. Two test temperatures (25°C and 40°C) were considered to simulate the average and high-temperature properties. Further, both moisture conditioned and unconditioned states were examined to evaluate the susceptibility to moisture. Obtained results were statistically analysed to determine the critical effects of the curing period, temperature and moisture conditioning on the CGBM properties. An example of a low volume road was used to assess the cost related to the use of CGBM as a structural layer. Overall, laboratory results showed CGBM to be an effective method for the utilisation of marginal aggregates in routine road construction with enhanced material properties as compared to the control mix. Statistical analysis showed a significant influence of curing, temperature and moisture on the properties of CGBM. Further, the replacement of the conventional bituminous layer with CGBM resulted in a substantial reduction in material use, indicating that the use of marginal materials in CGBM could lead to sustainable road assets.



中文翻译:

使用边际骨料表征水泥灌浆沥青混合物

本研究详细介绍了一项实验室研究的结果,该研究旨在评估用边际骨料制备的水泥灌浆沥青混合料 (CGBM) 的性能。出于比较的目的,还考虑了一种传统的密级配沥青混凝土混合物。然后根据其强度(稳定性和间接拉伸强度)、弹性性能(弹性模量和间接拉伸刚度模量)、耐久性(拉伸强度比)和抗松散性(坎塔布罗磨损测试)对制备的 CGBM 试样进行评估。测试在两个不同的固化期(7 天和 28 天)进行,以考虑水泥的长期强度增益。考虑了两个测试温度(25°C 和 40°C)来模拟平均和高温特性。更远,检查水分调节和未调节状态以评估对水分的敏感性。对获得的结果进行统计分析,以确定固化时间、温度和湿度条件对 CGBM 性能的关键影响。一个低流量道路的例子被用来评估与使用 CGBM 作为结构层相关的成本。总体而言,实验室结果表明 CGBM 是一种在常规道路建设中利用边际骨料的有效方法,与对照混合料相比,材料性能得到了增强。统计分析表明,固化、温度和湿度对 CGBM 的性能有显着影响。此外,用 CGBM 代替传统的沥青层导致材料使用量大幅减少,

更新日期:2020-10-22
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