摘   要：研究了钢渣粉作为辅助胶凝材料，其掺量（0、10%、20%、30%、40%、50%）对超高性能混凝土（Ultra-high performance concrete，UHPC）工作性、力学性能、物相组成、微观形貌、成本和碳排放量的影响。结果表明：随着钢渣粉掺量的增加，UHPC的流动度、28 d抗压强度均先增后降，28 d抗折强度降低；钢渣粉的掺入及掺量调整均未改变UHPC水化产物的类型，适量钢渣粉能填充孔隙，参与水化反应，提高基体密实度；当钢渣粉掺量为30%时，UHPC的综合性能、经济效益与生态效益实现最优平衡。Abstract： The effect of steel slag powder as a supplementary cementitious material at various content levels (0, 10%, 20%, 30%, 40%, 50%) on the workability, mechanical properties, phase composition, microstructure, cost, and carbon emissions of ultra-high performance concrete (UHPC) was investigated. The results show that with the increase of steel slag powder content, the fluidity and 28 d compressive strength of UHPC both first increase and then decrease, while the 28 d flexural strength decreases. The addition of steel slag powder and the adjustment of its content neither alter the type of UHPC hydration products. The appropriate content of steel slag powder can fill pores, participate in hydration reactions, and improve the density of the matrix. When steel slag powder content is 30%, optimum balance is achieved between the comprehensive performance, economic benefits, and ecological benefits of UHPC.

龙嘉琳,李斐斐,宋秋磊,等.生态型钢渣粉超高性能混凝土（UHPC）的制备及性能、双效益多目标研究[J].混凝土与水泥制品,2026(2):1-5,10. LONG J L,LI F F,SONG Q L,et al.Preparation and properties, dual-benefit multi-objective study of ecological ultra-high performance concrete (UHPC) with steel slag powder[J].China Concrete and Cement Products,2026(2):1-5,10.

摘   要：通过斜剪试验研究了改性活性粉末混凝土-普通混凝土（Modified reactive powder concrete-normal concrete，MRPC-NC）界面的黏结性能和破坏模式，分析了养护龄期、界面状态（湿润度）、NC强度等级、界面处理方式对斜剪强度的影响。结果表明：随着养护龄期的增加，试件的斜剪强度增加，3~7 d内，斜剪强度增长较快，7 d后，斜剪强度增长缓慢；随着湿润度的增加，试件的斜剪强度增加；采用凿毛+涂抹界面剂或凿毛+涂抹水泥净浆的方式均可以提高MRPC-NC试件的斜剪强度，且凿毛+涂抹界面剂的效果更好；随着NC强度等级的提高，试件的斜剪强度增加，但增加效果不明显；凿毛+刻槽的界面处理方式在提高试件的斜剪强度方面表现最出色。Abstract: The shear bonding performance and failure modes of the interface between modified reactive powder concrete and normal concrete (MRPC-NC) were investigated through oblique shear test. The effects of curing age, interface condition (moisture level), NC strength grade, and interface treatment methods on the oblique shear strength were analyzed. The results indicate that as the curing age increases, the oblique shear strength of the specimens rises, with rapid growth in the first 3~7 d and slower growth thereafter. An increase in moisture level enhances the oblique shear strength of the specimens. Both roughening+coating interface agent and roughening+coating cement slurry can improve the oblique shear strength of MRPC-NC specimens, and the roughening+coating interface agent shows better performance. As the NC strength grade increases, the oblique shear strength of the specimens improves, though the effect is not significant. The interface treatment method of roughening+grooving demonstrates the most outstanding performance in enhancing the oblique shear strength of the specimens.

王欣,薄睿彦,徐昊,等.6-10.MRPC-NC界面黏结性能的斜剪试验研究[J].混凝土与水泥制品,2026(2):6-10. WANG X,BO R Y,XU H,et al.Oblique shear test study of the bonding performance of MRPC-NC interface[J].China Concrete and Cement Products,2026(2):6-10.

摘   要：针对目前混凝土行业中广泛使用机制砂的现状，设计合成了一系列二甲基二烯丙基氯化铵（DADMA）与丙烯酰胺（AM）的无规共聚物PDCA，并考察了其在机制砂含泥、含絮凝剂的情况下对聚羧酸减水剂分散性的影响。结果表明：在产量一定的情况下，聚合物中阳离子单体比例和分子量均会影响PDCA的抗泥、抗絮凝剂性能；使用nDADMA ∶nAM=1.0∶1.0的投料比进行反应制备的PDCA，应用在含泥、含絮凝剂体系的混凝土中可节省聚羧酸减水剂，使经济效益最大化。Abstract: A series of random copolymers PDCA, synthesized from dimethyl diallyl ammonium chloride (DADMA) and acrylamide (AM), were designed to address the widespread use of manufactured sand in the concrete industry. The effects of these copolymers on the dispersibility of polycarboxylate superplasticizers under the conditions of manufactured sand containing mud and flocculants were investigated. The results indicate that, with a fixed production output, both the proportion of cationic monomers and the molecular weight of the polymer influence the anti-mud performance and anti-flocculant performance of PDCA. When prepared using a feed ratio of nDADMA∶nAM=1.0∶1.0, the resulting PDCA can reduce the consumption of polycarboxylate superplasticizers in concrete systems containing mud and flocculants, maximizing economic benefits.

缪志勇,卢立群,孙德文,等.阳离子聚合物的制备及其在含泥、含絮凝剂混凝土中对聚羧酸减水剂分散性的影响[J].混凝土与水泥制品,2026(2):11-14. MIAO Z Y,LU L Q,SUN D W,et al.Preparation of cationic polymers and their impact on the dispersion of polycarboxylate superplasticizers in concrete containing mud and flocculants[J].China Concrete and Cement Products,2026(2):11-14.