二灰砂砾级配参数研究

Study on Grade-parameter for Lime Fly-ash Stabilized Gravel

为建立混合料路用性能与组成材料之间的关系,在室内对3种类型、5个方案二灰砂砾进行了测试,通过分析粗级配参数、比表面积与强度增长率、干缩抗裂性能之间的关系,发现粗级配参数与强度增长率、骨料比表面积与混合料干缩抗裂性能密切相关,最终建立了粗级配参数与强度增长率关系式。研究表明,反应集料组成特性的粗级配参数、比表面积可用于评价二灰砂砾混合料强度增长及抗裂性能评价。

In order to build the relation between the material composition and the road use performance of the mixture, three types, five lime fly-ash stabilized gravel groups are tested, by study the relation of coarse-grade parameter comparative surface area with strength increase ratio, anti-cracking performance of stabilized lime fly-ash. The tests show that the coarse-grade parameter has close relation with strength growth rate, and the comparative surface area has close connection with anti-cracking performance, as indicated by the relation formula built. The study shows that the two parameters can be used to evaluate the performance of lime fly-ash stabilized gravel.