二灰稳定再生集料的最佳配合比研究

Research on the Optimized Mix Proportion of Recycled Concrete Aggregate Stabilized by Lime and Fly Ash

关键词:  二灰稳定再生集料（RSLF）  再生混凝土集料（RCA）  二灰比（LFR）  结合料性能

Key words:  recycled concrete aggregate stabilized by lime and fly ash (RSLF),recycled concrete aggregate (RCA),lime to fly ash ratio (LFR),performance of mixture

摘要:

采用石灰、粉煤灰及再生集料为原料，配制成二灰稳定再生集料的结合料．通过重型击实、无侧限抗压强度、劈裂以及室内抗压回弹试验，对不同配合比的二灰稳定再生集料的最大干密度、最佳含水量以及不同龄期的抗压强度、劈裂强度和抗压回弹模量进行了研究，分析了二灰比和再生集料的含量对结合料性能的影响，并通过对比分析得出了二灰稳定再生集料的优化配合比范围．

Abstract:

The recycled concrete aggregate stabilized by lime and fly ash (RSLF) was designed and fabricated by the lime, fly ash and recycled concrete aggregate (RCA). Based on the tests of heavy compact, unconfined compressive test, split tensile test and compressive rebound test, the physical and mechanical properties of RSLF, including the maximum dry density, the best water content, compressive and split tensile strength and the rebound modulus were investigated. The influence of both the lime to fly ash ratio (LFR) and the content of RCA on the performance of RSLF are concluded. Finally, the optimized mix proportion of RSLF is proposed.