Zeta Potential of Aggregate and Dynamic Modulus of HMA Estimation Using Aggregate Silica Content
Zeta Potential of Aggregate and Dynamic Modulus of HMA Estimation Using Aggregate Silica Content作者机构：Department of Geology Faculty of Science and Technology Cheikh Anta DIOP University of Dakar Dakar Senegal Graduate School of Sustainable Development and Society Iba Der Thiam University Thies Senegal Ecole de Technologie Supérieure de Montréal Montréal Canada
出 版 物：《Open Journal of Civil Engineering》 (土木工程期刊（英文）)
年 卷 期：2023年第13卷第1期
页 面：35-47页
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
主 题：Basalt of Diack Quartzite of Bakel Limestone of Bandia Complex Modulus Test Binder-Aggregate Adhesiveness
摘 要：The mineralogical composition of an aggregate influences its adhesion with bitumen and therefore its dynamic modulus. However, few studies have been conducted on this aspect. One of the most used properties to describe the impact of aggregate on the adhesiveness phenomena is the zeta potential. In this study, the first mineralogical and chemical properties were considered through the percentage of silica in the rock source of aggregates and the electric aggregate particles charge zeta. Dynamic modulus values used for regression process are determined from complex modulus test on nine asphalt concretes mix designed with aggregate types (basalt of Diack, quartzite of Bakel and Limestone of Bandia). The results showed that aggregate with high percentage of silica have higher zeta potential than aggregate with low percentage of silica. The development of a zeta potential predictive model showed a strong sensitivity to silica. The results of the complex modulus tests showed that Hot Mixture Asphalt (HMA) mixed with aggregate containing high silica contents gave better results than those mixed with aggregates containing low percentage of silica. The dynamic modulus predictive models of HMA developed shows that it is the properties of bitumen that influence more. However, the effect of silica although low, is very marked at low temperatures and high frequencies.
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