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通过分析所设计的沥青混合料来研究其压实特性。选择了石灰岩、砂岩、花岗岩3种集料类型。用贝雷法分别为每种集料类型设计了3种不同骨架结构。设计满足重交通要求,其最大公称粒径(NMAS)为12.5 mm。在压实过程中使用压力分布分析器(PDA)进行测力,通过从PDA中所取得的数据以及传统的旋转压实仪所得的结果对混合料的压实性能进行分析。并通过模拟试验(汉堡车辙试验)和基本原理试验(间接拉伸试验和半圆断裂试验)来测定混合料的试验室工作特性及评价在不同车载和环境条件下的工作性能。并考虑老化效应对混合料的影响。试验数据表明所研究的混合料对车辙和水损害等病害有超强抵抗能力,级配参数变化对压实指数和力学性能试验的结果有非常明显的影响,但对SGC和PDA中的能量指数的影响却不明显。
The compaction characteristics were studied by analyzing the designed asphalt mixture. Selected limestone, sandstone, granite three aggregate types. Three different skeleton structures were designed for each aggregate type using Berets method. Designed to meet heavy traffic requirements, its maximum nominal particle size (NMAS) is 12.5 mm. The force was measured using a pressure profile analyzer (PDA) during the compaction process and the compaction performance of the mix was analyzed by the data obtained from the PDA and from the results obtained with a conventional rotary compactor. The working characteristics of the mixture in the laboratory were measured by simulation test (hamburger rutting test) and basic principle test (indirect tensile test and semicircular fracture test), and the performance under different vehicle and environment conditions was evaluated. And consider the effect of aging on the mixture. The experimental data show that the mixture has superior resistance to diseases such as rutting and water damage, and the grading parameter changes have a very significant effect on the compaction index and the mechanical property test results. However, the energy index The impact is not obvious.