小粒径SMA-5组成设计与性能研究

发布时间：2018-03-19 17:55

本文选题：预防性养护　切入点：薄层罩面技术　出处：《山东大学》2015年硕士论文　论文类型：学位论文

【摘要】：预防性养护是一种在路面状况良好的情况下采取的对现有道路系统进行有计划的、基于费用一效益的养护策略。SMA-5是最大公称粒径为4.75mm的沥青玛蹄脂碎石混合料,是一种行之有效且常用的薄层罩面预防性养护技术。本文首先通过对不同级配、是否掺加木质素纤维等多组SMA-5沥青混合料进行试验研究,分析各体积指标的变化规律、材料组成和基本性能；然后从SMA-5沥青混合料的性能出发,运用贝雷法与新的试验方法及理论分析,对SMA-5的原材料选择、级配设计及调整方法、试件成型方法、体积指标和路用性能的技术要求等配合比设计中的关键技术问题开展了系统的研究；最后,通过单轴贯入抗剪试验和SPT沥青混合料简单性能试验,对SMA-5沥青混合料的抗剪特性、动态模量、以及流动次数等动态力学特性进行了研究与分析,结果表明SMA-5具有良好的路用性能与力学特性。本研究为小粒径SMA-5沥青混合料薄层罩面技术的推广与应用提供了重要的技术指导作用和一定的理论参考价值。
[Abstract]:Preventive maintenance is a planned and cost-effective maintenance strategy for existing road systems in good pavement condition. SMA-5 is a asphalt mastic mixture with a maximum nominal diameter of 4.75 mm. It is an effective and commonly used preventive maintenance technology for thin layer covering. Firstly, through the experimental study on different gradation, whether or not mixed with lignin fiber and other groups of SMA-5 asphalt mixture, the variation law of each volume index is analyzed. Based on the performance of SMA-5 asphalt mixture, using the Bayley method and new test method and theory analysis, the selection of raw materials, gradation design and adjustment method, sample forming method, The key technical problems in the design of mix ratio, such as volume index and technical requirement of road performance, are systematically studied. Finally, the shear characteristics of SMA-5 asphalt mixture are studied by uniaxial shear test and simple performance test of SPT asphalt mixture. The dynamic mechanical properties, such as dynamic modulus and flow times, are studied and analyzed. The results show that SMA-5 has good road performance and mechanical properties. This study provides important technical guidance and certain theoretical reference value for the popularization and application of thin layer covering technology of SMA-5 asphalt mixture with small particle size.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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