摘   要：以4种乳化剂的掺量为变量，通过正交试验探究了超高性能混凝土（UHPC）装饰板用最优水性脱模剂配比。结果表明：F5组（聚氧乙烯山梨醇酐单油酸酯15%、油酸山梨坦15%、双甘油脂肪酸酯20%、聚氧乙烯40硬脂酸酯10%）为复合乳化剂的最佳配比，并进一步试验得到乳化剂的最佳掺量为10%。所配制的水性脱模剂稳定性、均匀性、脱模效果、防锈效果均处于较优水平，满足UHPC装饰板对脱模剂的要求。 Abstract: The optimal mix proportion of water-based release agent for ultra-high performance concrete (UHPC) decorative panels was studied by orthogonal experiment by using four emulsifiers content as the variable. The optimal blend of F5 group (polyoxyethylene sorbitan monolaurate 15%, sorbitan monolaurate 15%, diglycerides of fatty acids 20%, polyoxyethylene stearate 40 10%) as the composite emulsifier is obtained. Further experiment determins that the optimal content of the emulsifier is 10%. The water-based release agent prepared has good stability, uniformity, release effect, and rust prevention, which meets the requirements of UHPC decorative panels for release agents.

陈建科.UHPC装饰板用水性脱模剂的研制[J].混凝土与水泥制品,2025(6):27-29. CHEN J K.Development of water-based release agent for UHPC decorative panels[J].China Concrete and Cement Products,2025(6):27-29.

摘   要：基于铁铝酸盐水泥的性能特点，设计了强度等级为C30、C35、C40、C45的核电工程用铁铝酸盐水泥混凝土，研究了该混凝土的工作性、抗压强度、电通量、绝热温升。结果表明：混凝土的坍落度为210~220 mm，扩展度均不低于500 mm，倒置坍落度筒排空时间不超过8 s，具备优异的工作性；混凝土具有良好的早强特点，其3 d抗压强度均达到设计强度等级值的103%以上；混凝土具有良好的抗氯离子侵蚀性能，除TLC40组外，其余各组28 d电通量均低于500 C；所设计的铁铝酸盐水泥混凝土还具有良好的温控能力，7 d水化热基本低于50 ℃。 Abstract: Based on the performance characteristics of ferro aluminate cement, ferro aluminate cement concrete in nuclear power engineering with strength grades of C30, C35, C40, C45 was designed. The workability, compressive strength, electrical flux and adiabatic temperature rise of the concrete were studied. The results show that the slump of the concrete ranges from 210 mm to 220 mm, the slump-flows are all not less than 500 mm, and the empty time of inverted slump tube does not exceed 8 s, indicating excellent workability. The concrete exhibits good early-strength characteristics, with 3 d compressive strength exceeding 103% of design strength grade value. The concrete shows strong resistance to chloride ion penetration, with 28 d electrical flux values below 500 C for all groups except TLC40 group. The designed ferro aluminate cement concrete also demonstrates effective temperature control capabilities, with 7 d hydration heat below 50 ℃ basically.

邱开建,向世文,李长成,等.核电工程用铁铝酸盐水泥混凝土性能研究[J].混凝土与水泥制品,2025(6):22-26. QIU K J,XIANG S W,LI C C,et al.Research on performance of ferro aluminate cement concrete in nuclear power engineering, ZHANG Huaying, ZHANG Wei, WANG Zhiyong[J].China Concrete and Cement Products,2025(6):22-26.

摘   要：采用纳米二氧化硅（NS）改性普通硅酸盐水泥-硫铝酸盐水泥（OPC-SAC）二元胶凝体系，研究了NS掺量对修补砂浆力学和抗碳化性能的影响，并通过XRD、TG、MIP、SEM分析了影响机理。结果表明：掺入适量NS可以提高试件的力学及抗碳化性能；适量的NS填充了试件内部孔隙，且为水化产物的生成提供成核位点，促进胶凝材料的早期水化反应，生成了较多的AFt和凝胶物质，使微观结构更加致密，同时减少CO2的进入通道，从而改善试件的力学和抗碳化性能。 Abstract: The binary cementitious system of ordinary Portland cement-csulfoaluminate cement(OPC-SAC) modified by nano silica(NS) was used to investigate the effect of NS content on the mechanical properties and carbonation resistance of repair mortar. The influence mechanism was analyzed by XRD, TG, MIP, and SEM. The results indicate that the appropriate content of NS can improve the mechanical properties and carbonation resistance of the specimens. An appropriate content of NS can fill the internal pores of the specimen, provide nucleation sites for the generation of hydration products, promote the early hydration of cementitious materials, generate more AFt and gel materials, make the microstructure more compact, at the same time, reduce the entry channel of CO2, and improve the mechanical properties and carbonation resistance of the specimen.

杨顺秦,余书亚,王伟杰.NS改性OPC-SAC二元胶凝体系力学和抗碳化性能研究[J].混凝土与水泥制品,2025(6):12-17,29. YANG S Q,YU S Y,WANG W J.Study on the mechanical properties and carbonation resistance of NS modified OPC-SAC binary cementitious system[J].China Concrete and Cement Products,2025(6):12-17,29.

摘   要：研究了反复荷载作用下不同锈蚀率钢筋对混凝土黏结性能的影响规律，并通过ANSYS软件进行了有限元分析，模拟了破坏形态。结果表明：钢筋锈蚀率越高，试件的峰值荷载降低越明显，反复荷载对试件黏结性能的影响越大，试件破坏越严重；试件的最大黏结应力随着钢筋锈蚀率的增加基本呈先升后降的趋势；试件的破坏形态与有限元分析结果基本相符。 Abstract: The influence of different corrosion rates of steel bars on the bonding performance of concrete under repeated loads was studied, and finite element analysis was conducted using ANSYS software to simulate the failure mode. The results show that the higher the corrosion rate of steel bars, the more significant the decrease in peak load of the specimen, the greater the impact of repeated loads on the bonding performance of the specimen, and the more severe the damage to the specimen. The maximum bonding stress of the specimen shows a trend of first increasing and then decreasing with the increase of steel corrosion rate. The failure mode of the specimen is basically consistent with the finite element analysis results.

王根伟,王善烨,于树志.反复荷载作用下锈蚀钢筋与混凝土的黏结性能研究[J].混凝土与水泥制品,2025(6):6-11. WANG G W,WANG S Y,YU S Z.Study on the bonding performance between corroded steel bars and concrete under repeated loads[J].China Concrete and Cement Products,2025(6):6-11.

摘   要：为了提升机制砂混凝土的抗冻性能，研究了膨胀珍珠岩颗粒（掺量0~14%）作为内养护材料对机制砂混凝土抗冻性能的影响规律，并通过核磁共振试验（NMR）与微观扫描电镜（SEM）测试，分析了其对机制砂混凝土抗冻性能的影响机理。结果表明：掺入适量膨胀珍珠岩颗粒可以有效改善机制砂混凝土的抗冻性能；当膨胀珍珠岩颗粒掺量为8%时，机制砂混凝土的抗冻性能最佳，且机制砂混凝土内部孔隙率与孔径均较小；当膨胀珍珠岩颗粒掺量大于12%时，机制砂混凝土的抗冻性能发生劣化，内部孔隙率与孔径增大。 Abstract: In order to improve the frost resistance of manufactured sand concrete, the effect of expanded perlite particles (content of 0~14%) as an internal curing material on the frost resistance of manufactured sand concrete was studied, where its mechanism was analyzed by nuclear magnetic resonance (NMR) and microscopic scanning electron microscopy (SEM). The results show that appropriate content of expanded perlite particles can effectively improve the frost resistance of manufactured sand concrete. The frost resistance of manufactured sand concrete is best with the 8% content of expanded perlite particles, where the internal porosity and pore size of manufactured sand concrete are low. However, when the content of expanded perlite particles is greater than 12%, it has a deterioration effect on the frost resistance of manufactured sand concrete, and the porosity and pore size of manufactured sand concrete are increased.

石庆瑄,魏列祥,朱贤儒,等.膨胀珍珠岩对机制砂混凝土抗冻性能的影响[J].混凝土与水泥制品,2025(6):18-21. SHI Q X,WEI L X,ZHU X R,et al.Effect of expanded perlite on frost resistance of manufactured sand concrete[J].China Concrete and Cement Products,2025(6):18-21.

摘   要：在有无围压两种条件下，对饱水状态和干燥状态下的混凝土试件进行了单轴、三轴压缩试验，并基于CT扫描三维重构技术获得了混凝土切片，对其进行了裂纹特征的分形维数研究。结果表明：饱水混凝土和干燥混凝土均存在明显的围压效应，但饱水混凝土呈现出更低的围压效应和抗压强度，在有、无围压条件下，饱水混凝土的抗压强度相较于干燥混凝土分别下降了16.45%和21.45%；饱水混凝土和干燥混凝土在有、无两种围压条件下新增孔隙率分别为0.78%、0.85%、0.57%和0.61%，饱水混凝土在有、无围压条件下的新增孔隙率相较于干燥混凝土分别提升了0.24%和0.21%；水和围压会影响混凝土破坏后裂纹发展的均匀性，加剧裂纹的不均匀发展。 Abstract: Under two conditions with and without confining pressure, unixial and triaxial compression tests were conducted on concrete specimens in saturated and dry conditions, and the fractal dimension of crack characteristics was studied based on the slices obtained from the three-dimensional reconstruction of CT scanning. The results indicate that both saturated and dry concrete exhibit significant effects of confining pressure, but saturated concrete demonstrates a lower confining pressure effect and compressive strength, which decreases by 16.45% and 21.45% compared to dry concrete under conditions with and without confining pressure, respectively. The add porosities of saturated and dry concrete with and without confining pressure are 0.78%, 0.85%, 0.57%, and 0.61%, respectively, and saturated concrete with and without confining pressure shows 0.24% and 0.21% higher add porosity compared to dry concrete. The uniformity of crack development post-failure is influenced by water and confining pressure, which intensifies the uneven progression of cracks.

仇志龙,谢全民,徐永康,等.饱水和围压条件对混凝土力学性能及分形特征的影响[J].混凝土与水泥制品,2025(6):1-5,11. QIU Z L,XIE Q M,XU Y K,et al.Research Effect of saturation and confining pressure on mechanical properties and fractal characteristics of concrete[J].China Concrete and Cement Products,2025(6):1-5,11.