摘   要：研究了不同比表面积（265、380、506、637、760、835 m2/kg）粉煤灰对混凝土工作性和长期（3~360 d）抗压强度、体积稳定性及胶凝材料化学结合水量的影响，并进行了微观分析。结果表明：随着粉煤灰比表面积的增加，混凝土的工作性和360 d抗压强度基本先增后降，各龄期收缩值基本先减小后增大，胶凝材料各龄期的化学结合水量先增后降；掺入适当比表面积的粉煤灰能在一定程度上降低混凝土的孔隙率，提高基体密实度，改善混凝土的长期力学及耐久性能。Abstract: The effects of fly ash with various specific surface areas(265, 380, 506, 637, 760, 835 m2/kg) on the workability, long-term(0~360 d) compressive strength and volume stability of concrete, and the chemically combined water content of cementitious materials were investigated, and microscopic analysis was carried out. The results show that, with the increase of fly ash specific surface area, the workability and 360 d compressive strength of concrete basically first increase and then decrease, the shrinkage value at each age basically first decreases and then increases, and the chemically combined water content of cementitious materials at each age first increases and then decreases. The incorporation of fly ash with appropriate specific surface area can effectively reduce the porosity of concrete to some extent and improve the density of matrix, thus improving the long-term mechanical performance and durability of concrete.

牛茂威,白延平,杨翔,等.磨细粉煤灰对混凝土长期性能的影响研究[J].混凝土与水泥制品,2025(8):21-24. NIU M W,BAI Y P,YANG X,et al.Research on the influence of ground fly ash on the long-term performance of concrete[J].China Concrete and Cement Products,2025(8):21-24.

摘   要：采用黄河泥沙部分代替胶凝材料制备了大流动性混凝土，通过极端顶点法建立了水泥、粉煤灰、黄河泥沙胶凝材料配合比体系，结合Scheffe回归方程建立了数学模型，揭示了胶凝材料组分对抗压强度的影响规律，研究了黄河泥沙掺量对混凝土工作性、耐久性能的影响。结果表明：试件的抗压强度与水泥掺量呈正相关，与粉煤灰、黄河特细沙掺量呈负相关，粉煤灰与水泥或黄河泥沙交互作用较弱，对试件抗压强度的影响较小，水泥与黄河泥沙之间交互作用较强，水泥发挥主效应影响试件的抗压强度；所建立的模型拟合程度较高，可以在满足抗压强度要求的前提下，制备工作性、抗冻性能、抗冲刷性能相对较好的黄河泥沙混凝土。Abstract: A high fluidity concrete was prepared by partially replacing cementitious materials with Yellow River sediment, the proportion system of cement, fly ash and Yellow River sediment cementitious materials was established by the Extreme Vertex Design Method(EVDM), and the mathematical model was established by combining with Scheffe’s regression equations to reveal the influence law of the components of the cementitious materials on the compressive strength, and the influence of the content of Yellow River sediment on the workability and durability of the high fluidity concrete was investigated. The results show that the compressive strength of the specimen is positively correlated with the cement dosage, and negatively correlated with the content of fly ash and Yellow River sediment. The interaction between fly ash and cement or Yellow River sediment is weak, which has less influence on the compressive strength of the specimen, and the interaction between cement and Yellow River sediment is stronger, and the cement plays a main role in influencing the compressive strength of the specimen. The established model has a high degree of fitting, which can be used to prepare Yellow River sediment concrete with relatively good workability, frost resistance performance, and erosion resistance performance under the premise of satisfying the compressive strength requirement. 

陈忠,韩璐,孙柯,等.基于极端顶点法的黄河泥沙混凝土的设计与性能研究[J].混凝土与水泥制品,2025(8):14-20. CHEN Z,HAN L,SUN K,et al.Research on the design and performance of Yellow River sediment concrete based on EVDM[J].China Concrete and Cement Products,2025(8):14-20.

摘   要：研究了矿渣掺量（0、30%、50%、70%、100%）对泡沫混凝土试件抗盐侵蚀性能的影响，通过对试件尺寸、质量变化及强度的测试，得到了矿渣的最佳掺量。结果表明：矿渣的掺入可以在一定程度上削弱盐溶液侵蚀带来的试件尺寸、质量和强度的变化；矿渣的最佳掺量为50%，此时试件的平均厚度差最小，质量变化率较低，无侧限抗压强度最高。Abstract: The influence of slag content(0, 30%, 50%, 70%, 100%) on the salt corrosion resistance of foamed concrete specimens was studied. By testing the size, mass changes, and strength of the specimens, the optimal content of slag is obtained. The results indicate that the addition of slag can to some extent weaken the size, mass and strength changes of specimens by salt solution corrosion. The optimal content of slag is 50%, the average thickness difference of the specimen is the smallest, the mass change rate is low, and the unconfined compressive strength is the highest.

肖清华,宋心彤,薛祥斌,等.矿渣对泡沫混凝土抗盐侵蚀性能的影响试验研究[J].混凝土与水泥制品,2025(8):10-13,20. XIAO Q H,SONG X T,XUE X B,et al.Experiment research on the effect of slag on salt corrosion resistance of foamed concrete[J].China Concrete and Cement Products,2025(8):10-13,20.

摘   要：用磷石膏、粉煤灰、矿渣粉、硫铝酸盐水泥、激发剂制备了磷石膏基胶凝材料，研究了其细度、比表面积、标准稠度用水量、凝结时间、安定性、水化热、力学性能和耐水性能，以及该胶凝体系C30混凝土的工作性、抗压强度和抗硫酸盐侵蚀性能，并进行了微观分析。结果表明：磷石膏基胶凝材料的细度为7.9%，比表面积为387 m2/kg，标准稠度用水量为29.1%，初、终凝时间分别为162 min、553 min，安定性合格，1、3、7 d水化热分别为92、151、175 kJ/kg，3 d、28 d抗压强度均满足P·O 42.5级水泥要求，耐水系数为0.93；磷石膏基胶凝材料混凝土的工作性和抗硫酸盐侵蚀性能均较好，28 d抗压强度为36.6 MPa，满足C30设计强度等级要求。Abstact: Phosphogypsum-based cementitious materials were prepared with phosphogypsum, fly ash, slag powder, sulfoaluminate cement and activator, and its fineness, specific surface area, standard consistency water consumption, setting time, stability, hydration heat, mechanical properties and water resistance were investigated. The workability, compressive strength, and sulfate attack resistance of C30 concrete with phosphogypsum-based cementitious materials system were studied, and microanalysis were carried out. The results indicate that the fineness of phosphogypsum-based cementitious material is 7.9%, the specific surface area is 387 m2/kg, the standard consistency water consumption is 29.1%, the initial and final setting time is 162 min and 553 min, respectively. The stability of phosphogypsum-based cementitious material is qualified, and the hydration heat at 1 d, 3 d and 7 d is 92 kJ/kg, 151 kJ/kg and 175 kJ/kg, respectively. The 3 d and 28 d compressive strength of phosphogypsum-based cementitious material meet the requirements of P·O 42.5 grade cement, and the water resistance coefficient is 0.93. The workability and sulfate attack resistance of concrete with phosphogypsum-based cementitious materials is good, and the 28 d compressive strength is 36.6 MPa, meeting the requirement of C30 design strength grade.

谢建海,雷航州,李明泽,等.磷石膏基胶凝材料的制备及其混凝土性能研究[J].混凝土与水泥制品,2025(8):6-9,20. XIE J H,LEI H Z,LI M Z,et al.Preparation of phosphogypsum-based cementitious materials and its concrete performance study[J].China Concrete and Cement Products,2025(8):6-9,20.

摘   要：研究了不同中值粒径（15、11、7、3 μm）湿磨超细化废弃混凝土再生微粉对砂浆流动度、力学性能及净浆体系水化程度和孔结构的影响。结果表明：随着湿磨再生微粉中值粒径的减小，砂浆的流动度、流动度比均降低，3、7、28 d抗折和抗压强度基本增大；湿磨再生微粉的掺入在一定程度上加速了净浆体系的早期水化速率，但会抑制后期的水化进程；随着湿磨再生微粉中值粒径的减小，净浆体系的水化程度提高，孔隙结构细化。Abstract：The effects of wet-grinding ultra-fine recycled micropowder from waste concrete with various median particle sizes(15, 11, 7, 3 μm) on the fluidity, mechanical properties of mortar, as well as the hydration degree and pore structure of the cement paste system were investigated. The results show that, with the decrease of the median particle size of the wet-grinding recycled micropowder, the fluidity and fluidity ratio of the mortar decreases, and the 3, 7, 28 d flexural and compressive strengths basically increase. The incorporation of wet-grinding recycled micropowder accelerates the early hydration rate of the cement paste system to a certain extent, but inhibits the later hydration process. With the decrease of the median particle size of the wet-grinding recycled micropowder, the hydration degree of the cement paste system increases, and the pore structure is refined.

王涛,施发弘,蒋俊,等.湿磨超细化废弃混凝土再生微粉用作矿物掺合料的研究[J].混凝土与水泥制品,2025(8):1-5. WANG T,SHI F H,JIANG J,et al.Research on the application of wet-grinding ultra-fine recycled micropowder from waste concrete as mineral admixture[J].China Concrete and Cement Products,2025(8):1-5.