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对级配碎石基层的使用效果和路用性能的主要影响因素进行了分析和总结,结合相关室内试验和试验路研究结果,给出了级配碎石基层路面结构、层厚、级配和材料控制的具体建议。研究结果表明,级配碎石能有效减缓反射裂缝和水损害等病害的发生,当其用于旧路加铺时可直接摊铺而不必采用倒装结构,但应控制其最小厚度不小于15cm,最大粒径和4.75mm、0.075mm通过率在文中建议范围内,还应控制石料压碎值、针片状含量和塑性指数满足要求,且碎石拌和应由4档以上矿料掺配而成。
The main influential factors of the use effect and road performance of the graded broken gravel base are analyzed and summarized. Based on the related laboratory tests and the research results of the experimental road, the structure, thickness, gradation, Material control specific recommendations. The results show that the graded gravel can effectively reduce the incidence of diseases such as reflection cracks and water damage. When it is used in old road paving, it can be directly paved without the use of flip-chip structure, but the minimum thickness should be controlled not less than 15cm , The maximum particle size and 4.75mm, 0.075mm pass rate recommended in the context of the text, but also should control the crushed stone value, needle flake content and plasticity index to meet the requirements, and gravel mixing should be more than 4 files mixed with to make.