引用本文摘 要：為了解決環境污染與資源緊張的問題，利用建筑垃圾中的廢棄混凝土制備再生粗骨料和再生細骨料，分別按照不同的取代率替代天然骨料以雙摻的形式制備再生混凝土。研究結果表明，雙摻再生骨料混凝土的工作性及力學性能要差于天然骨料混凝土；隨著再生細骨料和再生粗骨料取代率的增大，其用水量顯著增多，各個齡期的抗壓強度逐漸降低，但這兩種性能均呈現出較好的線性關系；當雙摻再生骨料的取代率均達到100%時，相比天然骨料混凝土，其用水量增多22.1%，抗壓強度降低19.2MPa，線性相關系數均在0.942以上；再生混凝土應用時，雙摻再生骨料的取代率均不宜大于50%。Abstract: In order to solve the problem of environmental pollution and resource shortage, the recycled coarse aggregate and recycled fine aggregate were used to prepare the recycled concrete by the waste concrete in the construction waste, and it was prepared by replacing natural aggregate with different replacement ratio in the form of double-admixing. The research results show that, the workability and mechanical properties of the double-admixing recycled aggregate concrete are worse than that of natural aggregate concrete. With the increase of the replacement ratio of recycled fine aggregate and recycled coarse aggregate, the water consumption of the concrete is increased significantly, and the compressive strength of each age is reduced gradually, but the two kinds of properties show a good linear relationship. When the replacement ratio of recycled aggregate is 100%, compared to the natural aggregate concrete, its water consumption increased by 22.1%, the compressive strength decreased by 19.2MPa, and the linear correlation coefficient is above 0.942. In the application of recycled concrete, the replacement ratio of double-admixing recycled aggregate should not be greater than 50%.