略谈集料品质对沥青混合料目标配合比设计的影响

Brief Discussion on Influence of Aggregate Quality on Design of Target Mixture Ratio of Asphalt Mixture

该文首先阐述了矿料品种、粗集料压碎值和细集料粉尘含量及集料体积指标对目标配合比设计的影响。在目标配合比设计中,选择合适的原材料是很关键的第一步。只有原材料能够满足设计的需要,才能够得到合理的设计结果,也可以避免因材料问题在设计过程中整个推倒重来,从而延误工程进度。集料作为构成沥青混合料的主体部分,是配合比设计原材料的一个重要组成部分。接着,针对集料的几个常见技术指标,结合目标配合比设计实例,讨论了在实际应用中所遇到的问题。

The article firstly sets forth the influence of mineral species,coarse aggregate crushing value,fine aggregate dust content as well as aggregate volume index on the design of target mixture ratio.The selection of suitable raw materials is a critical first step in the design of target mixture ratio.Only the raw material satisfies the design demand,can the reasonable design result be achieved,and also the delay of engineering schedule is avoided in the course of design because of material problem.The aggregate,as the main part of the composed asphalt mixture,is an important composition of raw materials in the design of mixture ratio.The article discusses the problems met in the practical application of several common technical indexes of aggregate by combined with the design case of target mixture ratio.