骨料级配对沥青混凝土性能的影响

IF 0.8 Q4 METALLURGY & METALLURGICAL ENGINEERING Kompleksnoe Ispolzovanie Mineralnogo Syra Pub Date : 2023-07-05 DOI:10.31643/2024/6445.04
S. Kosparmakova, Zh. A. Shashpan, M. Guler
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引用次数: 0

摘要

经济扩张是国家公路建设举措的积极副作用。因此,我们的计划是迅速建设这些项目。这就需要优质沥青。近几十年来,由于骨料级配的变化,大量沥青混合料被弃用,现场重建,浪费了宝贵的资源和时间。因此,本研究的目的是检查沥青混合料的耐久性,其中骨料级配从高于标准范围的+4%到低于标准范围的2%。骨料级配在整个HMA制造过程中是不一致的。骨料在允许范围上下分别按2%、4%和6%进行分级。例如:控制混合设计的级配。Marshall:在设计阶段对混合性能进行了定量评估。通过高温和水循环,通过车辆压力观察和间接拉伸强度(ITS)测试来评估HMA混合料的性能。在炎热的气候条件下,沥青级配高于标准值的+4%和低于标准值的2%,对水损伤的恢复能力最强,车辙最少。在温暖地区,沥青混合料的设计将受到较高的骨料级配限制。
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Effect of Aggregate Gradation on Asphalt Concrete Properties
Economic expansion is a positive side effect of national highway construction initiatives. So, the plan is to construct these projects rapidly. This calls for premium asphalt. As a result of aggregate gradation variation, numerous asphalt mixes have been rejected and rebuilt on-site in recent decades, resulting in the waste of valuable resources and valuable time. Consequently, the goal of this study was to examine the durability of asphalt mixes where the aggregate gradation ranged from +4% above to 2% below the standard range. The aggregate gradation is inconsistent throughout HMA manufacture. The aggregate is graded at 2, 4, and 6 percent over and below the allowed range. Case in point: the gradation of the control mix design. Marshall There was a quantitative evaluation of mixed properties throughout the design phase. HMA mix performance was evaluated via high temperature and water cycles by vehicle pressure observation and Indirect Tensile Strength (ITS) testing. In hot climates, asphalt with gradations above +4% and 2% of both the higher and lower standard values showed the greatest resilience to water damage and the least rutting. In warm regions, asphalt mixture design will be constrained by the higher aggregate gradation limits.
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