摘   要：为准确预测高强混凝土（HSC）的强度变化规律，调研收集了225组HSC配合比及其28 d强度数据，对统计变量进行Spearman相关性分析，并基于enter法建立了不同胶凝体系HSC的28 d强度与配合比之间的多元非线性回归模型。分析了不同模型预测值与实际值的散点图、残差图数据分布情况，并结合拟合优度指标和相对误差指标对模型进行了评价。结果表明：硅灰掺量、水胶比、胶凝材料总量和减水剂掺量对HSC的28 d强度影响效果显著，影响程度依次递减，P值均小于0.01；3种胶凝体系HSC强度回归模型的回归效果和预测精度均能满足预测要求。基于本文模型，可通过原材料配合比分别对C-F-Si-G四元胶凝体系、C-F-G三元胶凝体系和C-F二元胶凝体系HSC的28 d抗压强度进行预测。 Abstract: The data base of 225 sets of high-strength concrete(HSC) mix ratio and compressive strength curing for 28 d were established for predicting the strength of HSC accurately. Spearman correlation analysis was performed on statistical variables, and 3 multiple nonlinear regression models of different cementitious systems were established based on the enter method for strength prediction of HSC. The data distribution of scatter plots and residual plots of the predicted values and actual values of different prediction models were analyzed, and the goodness of fit index and the relative error index were also analyzed for model evaluation comprehensively. The results show that the dosage of silica fume, water-binder ratio, binder amount and water reducing agent dosage have a very significant effect on the compressive strength of HSC, the degree of importance decreases successively, and the P value is all less than 0.01. The regression results and prediction accuracy of all the prediction models can meet the prediction requirements. Based on this model, the 28 d compressive strength of HSC of the C-F-Si-G quaternary cementitious system, C-F-G ternary cementitious system and C-F dual cementitious system can be predicted through the different models based on material mixing ratio.

甘彬霖,冯旭海,毕经龙,等.基于多元非线性回归模型的高强混凝土强度预测研究[J].混凝土与水泥制品,2022(2):1-7. GAN B L,FENG X H,BI J L,et al.Research on the Multiple Nonlinear Regression Prediction Model for Compressive Strength of High-strength Concrete[J].China Concrete and Cement Products,2022(2):1-7.

中国混凝土与水泥制品协会.混凝土与水泥制品行业“十四五”发展指南（节选）[J].混凝土与水泥制品,2022(2):97-100.

摘   要：研究了盐雾侵蚀环境下不同掺量铁尾矿砂再生混凝土的抗氯离子侵蚀性能。结果表明：相同条件下，未掺铁尾矿砂再生混凝土的氯离子侵蚀深度远高于普通混凝土的氯离子侵蚀深度；随着铁尾矿砂掺量的增加，氯离子侵蚀深度先降后增，当铁尾矿砂掺量为30%~40%时，试件的氯离子侵蚀深度小于普通混凝土和未掺铁尾矿砂再生混凝土的氯离子侵蚀深度；相同侵蚀深度处的自由氯离子含量随铁尾矿砂掺量的增加先降后增，当铁尾矿砂掺量为40%时，自由氯离子含量总体上达到最低；总氯离子含量随侵蚀时间的延长变化不大，结合氯离子含量随侵蚀时间的延长而降低，同时自由氯离子含量随侵蚀时间的延长而增加。 Abstract: The chloride ion corrosion resistance of recycled concrete with different iron tailings content in salt spray environment was studied. The results show that the chloride ion erosion depth of recycled concrete without iron tailings is much higher than that of ordinary concrete under the same conditions. With the increase of the content of iron tailings, the chloride ion erosion depth decreases first and then increases, and when the content of iron tailings is 30%~40%, the chloride ion erosion depth is less than those of ordinary concrete and recycled concrete without iron tailings. The free chloride ion content at the same erosion depth decreases first and then increases with the increase of the content of iron tailings, and when the content of iron tailings is 40%, the free chloride ion content is generally the lowest. The total chloride ion content does not change much with the extension of erosion time, and the combined chloride ion content decreases with the extension of erosion time, and the free chloride ion content increases with the extension of erosion time.

王志齐,李涛.盐雾侵蚀环境下铁尾矿砂再生混凝土的耐久性试验研究[J].混凝土与水泥制品,2022(2):92-96. WANG Z Q,LI T.Experimental Study on Durability of Iron Tailings Recycled Concrete in Salt Spray Environment[J].China Concrete and Cement Products,2022(2):92-96.

摘   要：研究了钢渣粉替代部分水泥对超高性能混凝土（UHPC）性能的影响，验证了利用钢渣粉部分替代水泥制备生态型UHPC的可行性。结果表明：随着钢渣粉替代量的增加，UHPC的工作性得到改善；当钢渣粉替代量为200 kg/m3时，UHPC的密实度达到最大，且此时UHPC的抗压强度和抗氯离子渗透性能仍保持较好水平；随着钢渣粉替代量的增加，UHPC对生态环境的负面影响逐渐变小。 Abstract: The effect of steel slag powder replacing part of cement on the performance of ultra-high performance concrete(UHPC) was studied, and the feasibility of preparing ecological UHPC by partially replacing cement with steel slag powder was verified. The results show that with the increase of steel slag powder replacement amount, the workability of UHPC is improved. When the replacement amount of steel slag powder is 200 kg/m3, the compactness of UHPC reaches the maximum, and the compressive strength and chloride ion permeability of UHPC still maintain a good level. The negative impact of UHPC on the ecological environment gradually decreases with the increase of steel slag powder replacement amount.

王思雨,曾敏,胡方杰,等.利用钢渣粉制备生态型超高性能混凝土的研究[J].混凝土与水泥制品,2022(2):87-91. WANG S Y,ZENG M,HU F J,et al.Study on Preparation of Ecological Ultra-high Performance Concrete with Steel Slag Powder[J].China Concrete and Cement Products,2022(2):87-91.

摘   要：为了抑制金鸡湖隧道主体结构厚度为1.4 m侧墙的早期收缩裂缝，在优选原材料与配合比设计的基础上，提出了采用抗裂剂与冷却水管控温协同控制的方法来降低混凝土开裂风险，并通过理论评估与工程应用分析了该方法的可行性。结果表明：夏季高温施工时，通过使用抗裂剂与合理预埋、操作冷却水管来调控结构温升和变形，可将收缩开裂风险系数基本控制在0.7以下，实体结构监测结果也表明该方法切实有效。研究成果可为不具备严格控温条件的类似现浇隧道混凝土结构的开裂预防设计提供参考。 Abstract: In order to inhibit early-age shrinkage cracks of the sidewall with a thickness of 1.4 m in main structure of Jinji Lake Tunnel, based on the optimization of raw materials and mix proportion design, a cooperative control method of anti-cracking agent and cooling water pipe was proposed to reduce the concrete cracking risk, and the feasibility of this method was analyzed through theoretical evaluation and engineering application. The results show that the shrinkage cracking risk coefficient can be basically controlled below 0.7 by using anti-cracking agent and reasonably embedding and operating cooling water pipe to control the temperature rise and deformation of the structure during high temperature construction in summer. The monitoring results of actual structure also show that this method is effective. The research results can provide a reference for the crack prevention design of similar cast-in-place tunnel concrete structures without strict temperature control conditions.

林立文,王晨光,康健,等.抗裂剂与冷却水管协同控制金鸡湖隧道侧墙结构开裂应用研究[J].混凝土与水泥制品,2022(2):82-86. LIN L W,WANG C G,KANG J,et al.Study on the Effect of Anti-cracking Agent and Cooling Water Pipe on the Cracking of Sidewall Structure of Jinji Lake Tunnel[J].China Concrete and Cement Products,2022(2):82-86.

摘   要：通过对平面轴线尺寸为25.2 m×33.6 m大跨度楼盖的结构分析，探讨了大跨度混凝土结构的设计方法，提出了钢筋混凝土井字梁式楼盖结构的设计方案，可为类似大跨度楼盖结构的设计提供参考。 Abstract: Through the structural analysis of the long-span floor with a plane axis size of 25.2 m × 33.6 m, the design method of the long-span concrete structure is discussed, and the design scheme of the reinforced concrete well-shaped beam-type floor structure is put forward, which can provide a reference for the design of similar long-span floor structures.

白焕一.大跨度混凝土结构井字梁设计方法[J].混凝土与水泥制品,2022(2):76-81. BAI H Y.Design Method of Well-shaped Beam of Long-span Concrete Structures[J].China Concrete and Cement Products,2022(2):76-81.