Optimal design method of gradation for cement stabilized crushed stone with fine weathered rock aggregates
A model for the volume composition of mineral materials with a skeleton structure formed by coarse aggregate of crushed stones,and skeleton voids filled by fine weathered rock aggregates and cement as fine materials was formed.The optimal design method of gradation for the skeleton dense structure based on the theoretical formula for fine aggregates dosage was pro-posed,which was demonstrated and validated through example applications.The results show that the designed cement stabilized crushed stone mixed fine weathered rock aggregates(gradation 2#)has the smallest air void and the largest degree of compaction,which is a skeleton dense structure in practice.The 7 day-unconfined compressive strength of Grade 2# is the highest,19.1％high-er than Grade 3# and 7.9％higher than Grade 4#,meeting the basic strength requirements of the base layer of high-grade highways with heavy traffic,its tensile strength is 16.4％higher than that of Grade 3# and only 6.6％lower than Grade 4#,which verifies the feasibility and rationality of the grading optimization design method.
cement stabilized crushed stonefine weathered rock aggregatesfine aggregates dosageskeleton dense structureoptimal design of gradationmechanical property
万方数据
维普
