高性能RAP料配合比设计

发布时间：2018-04-09 08:47

  本文选题：道路工程　切入点：高性能RAP料　出处：《重庆交通大学学报(自然科学版)》2017年06期

【摘要】：对比分析了振动压实和重型击实成型方式下,级配RAP料物理、力学特性,研究表明使用振动压实的方法更能够代表实际的压实效果。采用粒子干涉理论对粗集料级配进行了优化,采用最大密度曲线理论Ⅰ法对细集料进行了优化,通过变化粗细集料比例,以最大干密度与强度双优化指标优选级配,初步提出具有优良物理力学特性的级配。在此基础上,进一步深入研究筛孔通过率对级配RAP料力学性能的影响规律,并以力学性能最优为原则,提出了基于振动成型的级配RAP料骨架密实级配。以劈裂强度为指标,提出了以长度为2.5 cm,掺量为1‰的仿钢纤维(PPTF)作为高性能RAP料的增强纤维。
[Abstract]:The physical and mechanical properties of graded RAP materials under vibration compaction and heavy compaction are compared and analyzed. The results show that the method of vibration compaction is more representative of the actual compaction effect.The gradation of coarse aggregate is optimized by particle interference theory, and the fine aggregate is optimized by using the theory of maximum density curve I. By changing the ratio of coarse aggregate to fine aggregate, the gradation is optimized by double optimization indexes of maximum dry density and strength.The gradation with excellent physical and mechanical properties is preliminarily proposed.On this basis, the influence of the pass rate of sieve holes on the mechanical properties of graded RAP was further studied, and based on the principle of optimum mechanical properties, the dense gradation of graded RAP was proposed based on vibration molding.Taking the splitting strength as the index, a kind of steel imitation fiber (PPTF) with a length of 2.5 cm and a content of 1 鈥，

本文编号：1725709