摘   要：从干堆积、湿堆积、化学堆积、复杂原料的等效堆积等方面综述了超高性能混凝土（UHPC）配合比设计理论从MAA模型发展至全尺度物理和化学协同堆积模型的过程，阐述了人工智能技术在提升理论设计精度中的重要应用，以及借助UHPC设计理论实现固废高质化利用和混凝土高性能协同提升的可行性，可为UHPC原材料的优化设计提供参考。 Abstract: A comprehensive overview of the development of the mix design theory of ultra-high performance concrete (UHPC) from the MAA model to full-scale physical and chemical synergistic stacking models, including aspects such as dry stacking, wet stacking, chemical stacking, and equivalent stacking of complex materials are provided. It also elucidates the significant application of artificial intelligence technology in improving theoretical design accuracy and the feasibility of achieving high-quality utilization of solid waste and synergistic enhancement of concrete performance through UHPC design theory. It can serve as a reference for the optimization design of UHPC raw materials.

冯元,吴赤球,吕伟,等.超高性能混凝土设计理论与磷石膏高质利用研究进展[J].混凝土与水泥制品,2024(1):1-8. FENG Y,WU C Q,LYU W,et al.Research progress on design theory of ultra-high performance concrete and high-quality utilization of phosphogypsum[J].China Concrete and Cement Products,2024(1):1-8.

摘   要：研究了石粉含量对轨道工程用C20、C35、C50机制砂混凝土性能的影响及石粉含量的合理范围。结果表明：对于工作性和抗压强度，机制砂混凝土的强度等级越高，石粉的最佳含量越小，C20机制砂混凝土的石粉含量宜为10%~20%，C35宜为5%~10%，C50宜为5%以内；对于早期抗裂性能，C35机制砂混凝土的石粉含量宜控制在3%~7%，C50宜控制在5%以内；对于抗氯离子渗透性能，C35机制砂混凝土的石粉含量宜控制在5%~15%，C50机制砂混凝土的性能受石粉含量的影响较小；对于抗冻性能，当石粉含量在5%以内时，C35机制砂混凝土的抗冻性能变化不明显，超过5%后，抗冻性能下降，石粉含量对C50机制砂混凝土抗冻性能的影响不明显。 Abstract: The effect of stone powder content on the performance of C20, C35 and C50 manufactured sand concrete for rail transit engineering was studied, and the reasonable range of stone powder content was determined. The results show that for workability and compressive strength, the higher the strength grade of manufactured sand concrete, the smaller the optimal content of stone powder. The stone powder content of C20, C35 and C50 manufactured sand concrete should be 10%~20%, 5%~10%, and within 5%, respectively. For early crack resistance, the stone powder content of C35 manufactured sand concrete should be 3%~7%, and C50 should be controlled within 5%. For the resistance to chloride ion penetration, the stone powder content of C35 manufactured sand concrete should be controlled within 5%~15%, and the performance of C50 manufactured sand concrete is less affected by the content of stone powder. For frost resistance, when the stone powder content is within 5%, the frost resistance of C35 manufactured sand concrete does not change significantly. After exceeding 5%, the frost resistance decreases, and the effect of stone powder content on the frost resistance of C50 manufactured sand concrete is not significant.

申晓明,许志杨,刘继红,等.石粉对轨道交通工程用机制砂混凝土性能的影响研究[J].混凝土与水泥制品,2024(1):9-13. SHEN Xiaoming, XU Zhiyang, LIU Jihong,et al.Study on the influence of stone powder on the performance of manufactured sand concrete used in rail transit engineering[J].China Concrete and Cement Products,2024(1):9-13.

摘   要：为解决减水剂与增稠剂之间的相容性问题，研发了一种含有增稠组分的新型稳定剂，研究了其对水泥基材料的流变性能、流动性、力学性能的影响，并分析了微观结构。结果表明：新型稳定剂与减水剂具有较好的相容性，相比于单掺减水剂的拌和物，复掺新型稳定剂的拌和物屈服应力和塑性黏度降低，扩展度和力学性能增加，拌和物未出现泌水，具有较好的均质性和稳定性，且微观结构相对致密。 Abstract: To solve the compatibility issue between water reducing agents and thickeners, a new type of stabilizer with thickening components was developed. The effects of this stabilizer on the rheological, flowability, and mechanical properties of cement-based materials were studied, and the microstructure was analyzed. The results show that the new stabilizer has good compatibility with the water reducing agent. Compared to the mixture with single addition of water reducing agent, the mixture with a combination of the new stabilizer reduces the yield stress and plastic viscosity, increases the expansion and mechanical properties, and does not show bleeding. The mixture has good homogeneity and stability, and the microstructure is relatively dense.

郑忠良,朱高鹏,么贵生,等.新型稳定剂对水泥基胶凝材料流变性能的影响[J].混凝土与水泥制品,2024(1):14-18,23. ZHENG Z L,ZHU G P,YAO G S,et al.Effects of new stabilizers on the rheological properties of cementitious materials[J].China Concrete and Cement Products,2024(1):14-18,23.

摘   要：为了探究高温下硫铝酸盐水泥混凝土的劣化规律及机理，研究了高温对不同水灰比、不同龄期的硫铝酸盐水泥混凝土抗压强度、剩余质量比率、试件爆裂率、红外温升、超声波脉冲速度的影响。结果表明：400 ℃及以上时，试件表面产生明显的裂缝，并发生爆裂现象，温度越高，爆裂率越高；试件的抗压强度和质量均随着温度的升高而降低， 水灰比越低，龄期越长，抗压强度损失越大，但质量损失越小；试件的超声波脉冲速度、红外升温速率和抗压强度的线性回归结果较好。 Abstract: In order to study the deterioration law and mechanism of sulphoaluminate cement concrete under high temperature, the effects of high temperature on the compressive strength, residual mass ratio, specimen burst rate, infrared temperature rise, ultrasonic pulse speed of sulfoaluminate cement concrete with different water cement ratios and different ages were studied. The results show that when the temperature is 400 ℃ or above, obvious cracks appear on the surface of the specimens and burst occurs, and the higher the temperature, the higher the burst rate. The compressive strength and mass of the specimens decrease with the increase of temperature. The lower the water cement ratio and the longer the age, the greater the loss of compressive strength, but the smaller the loss of mass. The linear regression results of the ultrasonic pulse velocity, infrared heating rate, and compressive strength of the specimen are good.

段登辉,陈嘉健,郑孙博,硫铝酸盐水泥混凝土高温劣化规律及机理研究[J].混凝土与水泥制品,2024(1):19-23. DUAN D H,CHEN J J,ZHENG S B,et al.Study on the deterioration law and the mechanism of sulphoaluminate cement concrete after high temperature[J].China Concrete and Cement Products,2024(1):19-23.

摘   要：研究了常温下不同纳米SiO2（NS）掺量（0、0.4%、0.8%、1.2%、1.6%、2.0%）对高强套筒灌浆料流动度和强度的影响，以及不同高温温度（150、200、250 ℃）下NS掺量对高强套筒灌浆料质量损失和强度的影响，并进行了微观机理分析。结果表明：常温下，NS的掺入降低了灌浆料的流动度，灌浆料的强度随NS掺量的增加先增大后降低；高温后，灌浆料的质量损失率随温度的升高逐渐增大，抗折强度逐渐降低，抗压强度先增大后降低；NS的掺入能够降低灌浆料的质量损失率和抗折强度损失率，提高抗压强度，且随着NS掺量的增加，质量损失率和抗折强度损失率先降低后增大；NS能够改善灌浆料的内部孔结构；随着温度的升高，灌浆料的内部结构先密实后疏松。 Abstract: The effects of different nano-SiO2 (NS) contents (0, 0.4%, 0.8%, 1.2%, 1.6%, 2.0%) on the fluidity and strength of high strength sleeve grouting material at room temperature, and the effects of NS content on the mass loss and strength of high strength sleeve grouting material at different high temperatures(150, 200, 250 ℃) were studied, and the microscopic mechanism was analyzed. The results show that at room temperature, the addition of NS reduces the fluidity of grouting material, and the strength of grouting material first increases and then decreases with the increase of NS content. After high temperature, the mass loss rate of grouting material increases gradually with the increase of temperature, the flexural strength decreases gradually, and the compressive strength increases first and then decreases. The addition of NS can reduce the mass loss rate and the flexural strength loss rate of grouting material, and improve the compressive strength, and with the increase of NS content, the mass loss rate and flexural strength loss rate first decrease and then increase. NS can improve the internal pore structure of grouting material. With the increase of temperature, the internal structure of grouting material is first dense and then loose.

逄鲁峰，庞伟琪，郎慧东,纳米SiO2增强高强套筒灌浆料及高温后性能试验研究[J].混凝土与水泥制品,2024(1):24-29. PANG L F,PANG W Q,LANG H D,et al.Experimental study of nano-SiO2 reinforced high strength sleeve grouting material and post-high temperature performance[J].China Concrete and Cement Products,2024(1):24-29.

摘   要：通过改变石粉含量、砂率以及砂级配得到不同浆膜层厚度（PFT）和水膜层厚度（WFT）的混凝土拌合物，通过混凝土扩展度以及T500试验，研究了PFT与WFT对新拌混凝土流动性的影响。结果表明：当WFT＞1.40 μm时，混凝土的扩展度及T500随PFT同步变化；当WFT＜1.40 μm时，混凝土的扩展度及T500随WFT同步变化；当PFT与WFT同时增加时，混凝土的扩展度增加，T500降低；当PFT与WFT同时降低时，PFT与WFT的降幅不同，混凝土的扩展度及T500变化也有所差异。 Abstract: By changing the content of stone powder, sand ratio, and sand grading, concrete mixtures with different slurry film thickness(PFT) and water film thickness(WFT) were obtained. The influence of PFT and WFT on the flowability of fresh concrete was studied through concrete expansion and T500 tests. The results indicate that when WFT＞1.40 μm, the expansion and T500 of concrete change synchronously with PFT. When WFT＜1.40 μm, the expansion and T500 of concrete change synchronously with the change of WFT. When PFT and WFT increase simultaneously, the expansion of concrete increases and T500 decreases. When both PFT and WFT decrease simultaneously, the reduction amplitude of PFT and WFT is different, and the expansion and T500 changes of concrete are also different.

陶俊,罗小东,黄小川,等.浆膜层和水膜层厚度对新拌混凝土流动性的影响[J].混凝土与水泥制品,2024(1):30-34. TAO J,LUO X D,HUANG X C,et al.Influence of slurry film thickness and water film thickness on flowability of fresh concrete[J].China Concrete and Cement Products,2024(1):30-34.