自密实再生混凝土工作及力学性能研究进展

自密实混凝土具有高流动性、抗离析性及较好的自密实性等特点,有利于提升工程质量及降低工程成本。将再生骨料应用于自密实混凝土中,可实现建筑废弃物的循环利用。为了确保自密实再生混凝土在工程应用过程中的可行性与安全性,还需在其工作性与力学性能等方面进行大量改性研究。基于自密实混凝土的流变密实机理,归纳总结了自密实混凝土的配合比设计原理,总结并评述了自密实再生混凝土的工作性能、力学性能的研究进展。最后,分析了自密实再生混凝土工作及力学性能研究所存在的问题,并对其前景进行展望,有助于推动自密实再生混凝土大规模地应用于实际工程中。

Workability and Mechanical Properties of Self-Compacting Recycled Concrete: a Review

Self-compacting concrete has the characteristics of high fluidity, anti-segregation, and better compactness, which is beneficial for the improvement of engineering quality and the reduction of the project cost. The addition of recycled aggregate into self-compacting concrete realizes the recycling of construction and demolition waste. To ensure the feasibility and safety of self-compacting recycled concrete applied in practical engineering, a large number of the modified studies on the workability and mechanical properties of self-compacting recycled concrete must still be further carried out. Based on the rheological compaction mechanism of self-compacting concrete, the design principle of self-compacting concrete proportion was summarized. The research progress of workability and mechanical properties of self-compacting recycled concrete were further summarized and reviewed. Finally, the problems existing in the current research on the workability and mechanical properties of self-compacting recycled concrete were analyzed, and then the future development of self-compacting recycled concrete was prospected. This research will be helpful for promoting the large-scale application of self-compacting recycled concrete in the practical engineering.