摘   要：研究了高钛重矿渣砂的冷却方式、粒径、细度模数和颗粒级配、渣粉含量、预湿时间对超高性能混凝土（UHPC）工作性和力学性能的影响，采用SEM观察了UHPC的微观结构。结果表明：与慢冷高钛重矿渣砂相比，掺快冷高钛重矿渣砂UHPC的工作性略差，但力学性能较好；随着快冷高钛重矿渣砂粒径的增大，UHPC的工作性和力学性能均先提升后下降，推荐粒径为0.60~2.36 mm；采用细度模数为2.6且位于Ⅱ区中值的快冷高钛重矿渣砂制备的UHPC工作性和力学性能优异；随着渣粉含量的增加，UHPC的工作性和力学性能先提升后下降，快冷高钛重矿渣砂中的渣粉含量应控制在6%以下；随着快冷高钛重矿渣砂预湿时间的增加，UHPC的工作性和力学性能先提升后基本不变，最佳预湿时间为12 h。 Abstract: The effects of cooling mode, particle size, fineness modulus and particle size distribution, slag powder content and pre-wetting time of high titanium heavy slag sand on the workability and mechanical properties of ultra-high performance concrete(UHPC) were studied, and the microstructure of UHPC was observed by SEM. The results show that compared with slow-cooling high titanium heavy slag sand, the UHPC mixed with fast-cooling high titanium heavy slag sand has poorer workability, but better mechanical properties. With the increase of particle size of fast-cooling high titanium heavy slag sand, the workability and mechanical properties of UHPC are improved first and then decreased, and the recommended particle size is 0.60~2.36 mm. The UHPC prepared with fast-cooling high titanium heavy slag sand with fineness modulus of 2.6 and median value in zone Ⅱ has excellent workability and mechanical properties. With the increase of slag powder content, the workability and mechanical properties of UHPC are improved first and then decreased, and the slag powder content in fast-cooling high titanium heavy slag sand should be controlled below 6%. With the increase of pre-wetting time of fast-cooling high titanium heavy slag sand, the workability and mechanical properties of UHPC are improved first and then basically unchanged, and the optimal pre-wetting time is 12 h.

陈超,张恒.高钛重矿渣砂对超高性能混凝土（UHPC）性能的影响[J].混凝土与水泥制品,2023(1):74-78,83. CHEN C, ZHANG H.Effect of High Titanium Heavy Slag Sand on the Properties of Ultra-high Performance Concrete (UHPC)[J].China Concrete and Cement Products,2023(1):74-78,83.

摘   要：采用矿渣制备了超硫酸盐水泥，研究了硫酸亚铁和硝酸钙的掺量和掺加方式对超硫酸盐水泥3 d、7 d、28 d和90 d抗压、抗折强度的影响。结果表明：单掺适量硫酸亚铁时，超硫酸盐水泥各龄期的抗压、抗折强度均有所提高，但掺量过大（＞0.5%）时对早期（3 d）抗压、抗折强度不利；单掺硝酸钙时，超硫酸盐水泥各龄期的抗压、抗折强度均有所降低；复掺硫酸亚铁和硝酸钙时，超硫酸盐水泥各龄期的抗压、抗折强度较未掺和单掺时均有明显提高，其中，复掺1.5%硫酸亚铁和2.0%硝酸钙对强度的提高效果最好。 Abstract: The supersulfate cement was prepared with slag, and the effects of ferrous sulfate and calcium nitrate on the compressive and flexural strength of supersulfate cement at 3 d, 7 d, 28 d and 90 d were studied. The results show that the compressive and flexural strength of supersulfate cement at all ages are improved with the appropriate content of ferrous sulfate alone, but the early compressive and flexural strength (3 d) are not good when the content is too large (>0.5%). When adding calcium nitrate alone, the compressive and flexural strength of each age of supersulfate cement decrease. When mixed with ferrous sulfate and calcium nitrate, the compressive and flexural strength of supersulfate cement at each age are significantly improved compared with those of blank group and single adding group, among them, mixed with 1.5% ferrous sulfate and 2.0% calcium nitrate has the best effect.

季军荣,武双磊,周威杰,等.硫酸亚铁和硝酸钙对超硫酸盐水泥强度的影响[J].混凝土与水泥制品,2023(1):79-83. JI J R,WU S L,ZHOU W J,et al.Effects of Ferrous Sulfate and Calcium Nitrate on Strength of Supersulfate Cement[J].China Concrete and Cement Products,2023(1):79-83.

摘   要：研究了玄武岩石粉的粒径和替代率0、10%、20%、30%（等质量替代水泥）对高性能混凝土（HPC）工作性和抗氯离子渗透性能的影响，并结合压汞分析技术从微观角度探讨了玄武岩石粉的作用机理。结果表明：随着玄武岩石粉粒径和替代率的增加，HPC的流动度和初凝时间均呈增大趋势；随着玄武岩石粉替代率的增加，HPC的电通量先减小后增大；随着玄武岩石粉粒径的增加，HPC的电通量呈增大趋势；玄武岩石粉的粒径对HPC抗氯离子渗透性能的影响与其替代率紧密相关，当替代率较低时，粒径越小，HPC的抗氯离子渗透性能越好，而当替代率较高时，减小粒径对HPC抗氯离子渗透性能的改善效果不大；玄武岩石粉的填充效应和潜在活性可以提高基体的密实度，从而提高HPC的抗氯离子渗透性能。 Abstract: The influence of particle size and replacement rate(0, 10%, 20%, 30%) of basalt powder on the workability and chloride ion penetration resistance of high performance concrete(HPC) was studied, and the action mechanism of basalt powder was discussed from the microscopic perspective in combination with mercury intrusion analysis technology. The results show that the fluidity and initial setting time of HPC increase with the increase of basalt powder size and replacement rate. With the increase of basalt powder replacement rate, the electrical flux of HPC decreases first and then increases. With the increase of particle size of basalt powder, the electrical flux of HPC increases. The influence of particle size of basalt powder on the chloride ion penetration resistance of HPC is closely related to its replacement rate. When the replacement rate is low, the smaller the particle size, the better the chloride ion penetration resistance of HPC, while when the replacement rate is high, the reduction of particle size has a small impact on the chloride ion penetration resistance of HPC. The filling effect and potential activity of basalt powder can improve the compactness of matrix, thus improving the chloride ion penetration resistance of HPC.

成功,周权,陈士堃,等.玄武岩石粉对HPC工作性及抗氯离子渗透性能的影响[J].混凝土与水泥制品,2023(1):84-87. CHENG G,ZHOU Q,CHEN S K,et al.Effect of Basalt Powder on Workability and Chloride Ion Penetration Resistance of High Performance Concrete(HPC)[J].China Concrete and Cement Products,2023(1):84-87.

摘   要：研究了石灰石尾矿粉等质量替代0、10%、20%、30%、40%的水泥对全再生骨料混凝土工作性、力学性能和耐久性能的影响。结果表明：10%掺量的石灰石尾矿粉可以改善全再生骨料混凝土的工作性；随着石灰石尾矿粉掺量的增加，试件的抗压强度呈先增大后减小的趋势，最佳掺量为10%；10%掺量的石灰石尾矿粉可以改善全再生骨料混凝土的抗冻性能和抗碳化性能。 Abstract: The influence of limestone tailing powder content(0, 10%, 20%, 30%, 40%) on the workability, mechanical properties and durability of fully recycled aggregate concrete was studied. The results show that 10% limestone tailing powder can improve the workability of fully recycled aggregate concrete. With the increase of limestone tailing powder content, the compressive strength of the specimen increases first and then decreases, and the optimal content is 10%. 10% limestone tailing powder can improve the frost resistance and carbonation resistance of fully recycled aggregate concrete.

袁继东,任启富,范晓玲.石灰石尾矿粉对全再生骨料混凝土性能的影响[J].混凝土与水泥制品,2023(1):88-90,94. YUAN J D,REN Q F,FAN X L.Effect of Limestone Tailing Powder on the Properties of Fully Recycled Aggregate Concrete[J].China Concrete and Cement Products,2023(1):88-90,94.

摘   要：采用拟水平法研究了脱硫灰掺量、粗骨料掺量和水胶比对脱硫灰混凝土抗压强度的影响。结果表明：水胶比对试件抗压强度的影响最显著，脱硫灰掺量次之，粗骨料掺量影响最小；随着水胶比的增加，试件的抗压强度下降；粗骨料掺量为0的试件抗压强度较粗骨料掺量为64%的试件低；随着脱硫灰掺量的增加，试件的抗压强度先增大后减小。脱硫灰混凝土的最佳配合比为：水胶比0.34、脱硫灰掺量20%、粗骨料掺量64%。 Abstract: The quasi horizontal method was used to study the influence of desulfurized ash content, coarse aggregate content and water-binder ratio on the compressive strength of desulfurized ash concrete. The results show that the water-binder ratio has the most significant effect on the compressive strength of the specimens, followed by the desulfurized ash content, and the coarse aggregate content has the least effect. With the increase of water-binder ratio, the compressive strength of the specimen decreases. The compressive strength of the specimen with 0 coarse aggregate content is lower than that of the specimen with 64% coarse aggregate content. With the increase of desulfurized ash content, the compressive strength of the specimen increases first and then decreases. The best mix proportion of desulfurization ash concrete is water-binder ratio of 0.34, desulfurized ash content of 20%, and coarse aggregate content of 64%.

杨俊,谈嗣勇,于峰,等.基于拟水平法的脱硫灰混凝土配合比试验研究[J].混凝土与水泥制品,2023(1):91-94. YANG J,TAN S Y,YU F,et al.Experimental Study on Mix Proportion Design of Desulfurized Ash Concrete Based on Quasi Horizontal Method[J].China Concrete and Cement Products,2023(1):91-94.

摘   要：总结了粉煤灰、偏高岭土、矿渣、硅灰等矿物掺合料改性磷酸镁水泥（MPC）的力学性能及耐久性能研究进展，基于现阶段研究中存在的问题，结合实际工程需求，对矿物掺合料改性MPC的研究及发展方向进行了展望。 Abstract: The research progress of mechanical properties and durability of magnesium phosphate cement (MPC) modified by mineral admixtures such as fly ash, metakaolin, slag, and silica fume is summarized. Based on the problems existing in the current research on MPC modified by admixture, combined with the actual engineering needs, the research and development direction are prospected.

朱金才,曹琪,孟晓凯,等.矿物掺合料改性磷酸镁水泥力学和耐久性能研究进展[J].混凝土与水泥制品,2023(1):95-98. ZHU J C,CAO Q,MENG X K,et al.Research Progress on Mechanical Properties and Durability of Magnesium Phosphate Cement Modified by Mineral Admixtures[J].China Concrete and Cement Products,2023(1):95-98.