摘   要：利用物理、化学、高温方式对再生砖粉进行了活性激发，测试其活性指数，并研究了活性最高再生砖粉的取代率对超高性能混凝土（UHPC）抗压性能、抗折性能和劈裂抗拉性能的影响。结果表明：物理、化学、高温方式均有助于激发再生砖粉的活性，其中，球磨45 min再生砖粉的活性最高，为71.4%；再生砖粉UHPC的力学性能与再生砖粉取代率呈负相关；当再生砖粉取代率为10%时，再生砖粉UHPC的力学性能接近基准组。 Abstract: The physical, chemical and high temperature methods were used to activate the recycled brick powder, and its activity index was tested, and the effect of the replacement rate of the most active recycled brick powder on the compressive, flexural and split tensile properties of UHPC was studied. The results show that the physical, chemical and high temperature methods are helpful to stimulate the activity of recycled brick powder, and the activity of recycled brick powder is the highest at 71.4% by ball milling for 45 min. The mechanical properties of recycled brick powder UHPC are negatively correlated with the replacement rate of recycled brick powder. When the recycled brick powder replacement rate is 10%, the mechanical properties of recycled brick powder UHPC are close to those of the reference group.

杜明芳,赵永强,遆永新,等.活性激发再生砖粉对UHPC力学性能的影响[J].混凝土与水泥制品,2021(6):91-94. DU M F,ZHAO Y Q,TI Y X,et al.Effect of Activated Recycled Brick Powder on Mechanical Properties of UHPC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):91-94.

辛晓斌,李骁男,刘永川,等.工程渣土陶粒多孔混凝土力学与植生性能研究[J].混凝土与水泥制品,2021(6):95-98. XIN X B,LI X N,LIU Y C,et al.Study on Mechanical and Planting Performance of Engineering Residue Ceramsite Porous Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):95-98.

摘   要：研究了再生骨料替代率、聚丙烯纤维和钢纤维掺量对再生混凝土性能的影响。结果表明：替代率为30%的再生细骨料对混凝土的密度、和易性以及抗压强度无显著的负面影响；一定掺量的纤维对混凝土的工作性无显著影响，但能有效提高再生混凝土的劈裂抗拉强度和抗折强度，改善混凝土的抗裂性和脆性。 Abstract: The effects of recycled aggregate replacement rate, polypropylene fiber and steel fiber content on the properties of recycled concrete were studied. The results show that the recycled fine aggregate with a replacement rate of 30% has no significant negative effect on the density, workability and compressive strength of concrete. A certain amount of fiber has no significant effect on the workability of concrete, but it can effectively improve the splitting tensile strength and flexural strength of recycled concrete, and improve the cracking resistance and brittleness of concrete.

王立波,赵军.再生混凝土配合比优化设计[J].混凝土与水泥制品,2021(6):99-102. WANG L B,ZHAO J.Optimization Design of Mix Proportion of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):99-102.