Interpretation and Practice on Specification of Mix Design of Asphalt Mixture
To enhance understanding and application of Appendix B"design of mix ratio of hot mix asphalt mixture"in Technical Specifications for Construction of Highway Asphalt Pavement(JTG F40-2004).This paper interprets relevant provisions of the specification.It discusses the principles of asphalt mixture volume design method,analyzes the significance of each volume parameter,and explores their internal logical relationships.The discussion focuses on the law of void in mineral aggregate and void ratio,and examples are used to verify the feasibility of calculating optimal asphalt content.The results show that the function of minimum void in mineral aggregate is to ensure that the asphalt mixture has the minimum asphalt film thickness;When the composition of the mineral aggregate and the asphalt content are determined,the void in mineral aggregate of the specimen increases or decreases with the increase or decrease of the void ratio using different compaction powers.Theoretical calculation methods is beneficial for determining the optimal asphalt content more accurately and quickly,and shortening the cycle of target mix design.
specification interpretationmix designclearance ratio of mineral aggregatevoid ratioasphalt film thicknesscalculation of optimum asphalt content
万方数据
维普
