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Evaluation of different types of carbonate aggregate performance in asphalt mixtures
Bulletin of Engineering Geology and the Environment ( IF 3.7 ) Pub Date : 2022-07-25 , DOI: 10.1007/s10064-022-02815-8
Erfan Sadeghi , Mohammad Reza Nikudel , Amir Kavussi , Mashallah Khamehchiyan

A comprehensive lithological and petrographic analysis of the aggregates gives information about the relationships between the aggregate properties and pavement performance. Although few studies have clearly established these relationships with various types of aggregates, they have not provided the effects of different types of carbonate aggregates. The purpose of this paper is to look at some aspects of the effects of different types of carbonate rocks on the performance of hot mix asphalt (HMA). Six types of aggregates that were evaluated in this study were collected from Central Alborz Zone (CAZ), one of the most important zones in Iran, and all of these were classified based on the petrographic study as carbonate rocks. This article has a deeper analysis of the rock material properties through a behavior analysis of asphalt mixtures subjected to boiling water, tensile strength ratio (TSR), semi-circular bending (SCB), and Cantabro tests. The most practical method for this purpose is to use microscopic thin sections of asphalt for evaluation of material properties on a small scale. Through an extensive laboratory program, the effects of aggregate properties on key mixture performance-based parameters such as adhesion, moisture susceptibility, fatigue, and durability are systematically summarized. The finding results show a classification for six different carbonate rocks based on their geological parameters. Also, a table is provided to aid in rock classification, indicating the most likely trend of each performance-based test result for carbonate rocks. Based on the Dunham classification for carbonate rocks, mud-supported materials have higher performance than grain-supported materials.



中文翻译:

沥青混合料中不同类型碳酸盐骨料性能评价

对集料进行全面的岩性和岩相分析可以提供有关集料特性和路面性能之间关系的信息。尽管很少有研究清楚地确定与各种类型的聚集体的这些关系,但它们没有提供不同类型的碳酸盐聚集体的影响。本文的目的是研究不同类型碳酸盐岩对热拌沥青 (HMA) 性能的影响的某些方面。在本研究中评估的六种类型的骨料是从伊朗最重要的区域之一的中央厄尔布尔士带 (CAZ) 收集的,所有这些都根据岩石学研究归类为碳酸盐岩。本文通过对经受沸水、抗拉强度比 (TSR)、半圆弯曲 (SCB) 和 Cantabro 测试的沥青混合物的行为分析,对岩石材料特性进行了更深入的分析。为此目的,最实用的方法是使用沥青的微观薄片来小规模地评估材料性能。通过广泛的实验室计划,系统总结了骨料性能对关键混合物性能参数的影响,例如附着力、湿气敏感性、疲劳和耐久性。发现结果显示了基于地质参数的六种不同碳酸盐岩的分类。此外,还提供了一个表格来帮助进行岩石分类,指示碳酸盐岩石的每个基于性能的测试结果的最可能趋势。

更新日期:2022-07-26
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