摘   要：研究了CO2矿化养护（预养护条件、CO2浓度、养护压力和养护时间）对混凝土固碳率和性能的影响，并对养护后混凝土的微观形貌和矿物组成进行了分析。结果表明：通过合理的预养护可以降低试件的剩余水灰比，有效提高试件的表观固碳率；相对于标准和加热干燥预养护，室温吹风为最宜预养护条件；当CO2浓度为99.9%、养护压力为0.8 MPa、养护时间为12 h时，试件的固碳能力较好，28 d抗压强度达60.0 MPa，抗氯离子渗透、抗渗和抗冻性能均较好，28 d碳化深度稍有增加，但28 d至56 d碳化深度不再增加；CO2矿化养护会消耗混凝土中的Ca(OH)2，生成更多的CaCO3产物，改善了混凝土的微观结构。Abstract: The influence of CO2 mineralization curing (pre-curing conditions, CO2 concentration, curing pressure, and curing time) on the carbon fixation rate and performance of concrete was studied, and the microstructure and mineral composition of the cured concrete were analyzed. The results indicate that reasonable pre-curing can reduce the residual water-cement ratio of the specimens, effectively improve the apparent carbon fixation rate of the specimens. Compared to standard and heating drying pre-curing, room temperature air blowing is the most suitable pre-curing condition. When the CO2 concentration is 99.9%, the curing pressure is 0.8 MPa, and the CO2 mineralization curing time is 12 h, the carbon fixation ability of the specimen is good, the compressive strength at 28 d reaches 60.0 MPa, and the resistance to chloride ion penetration, permeability, and frost resistance is good. The carbonization depth slightly increases at 28 d, but the carbonization depth does not increase from 28 d to 56 d. CO2 mineralization curing consumes Ca(OH)2 in concrete, generates more CaCO3 products, and improves the microstructure of concrete.

林茂松,杨利香,杨光.CO2矿化养护对混凝土性能影响的试验研究[J].混凝土与水泥制品,2025(8):111-114. LIN M S,YANG L X,YANG G.Experimental study on the influence of CO2 mineralization curing on concrete performance[J].China Concrete and Cement Products,2025(8):[J].China Concrete and Cement Products,2025(8):111-114.

摘   要：实现混凝土全生命周期碳减排，对建筑行业的低碳与绿色可持续发展具有重要意义。混凝土全生命周期减碳技术主要有3类：直接减碳技术、间接减碳技术和碳的捕集、利用与封存（CCUS）技术；直接减碳技术包括水泥清洁生产技术（提高能源利用率、使用非碳钙质原料、清洁燃料和清洁电力）和混凝土成分优化技术（使用低碳胶凝材料、矿物掺合料和再生骨料）；间接减碳技术主要通过提高混凝土耐久性能实现；CCUS技术贯穿混凝土全生命周期中的各个阶段，通过在混凝土拌合与养护、再生骨料碳化养护过程中注入CO2，可有效实现碳封存。Abstract: Realizing carbon reduction throughout the life-cycle of concrete is of great significance for the low-carbon and green sustainable development of the construction industry. There are three main types of carbon reduction technologies for the life-cycle of concrete, including direct carbon reduction technology, indirect carbon reduction technology, and carbon capture, utilization and storage(CCUS) technology. Direct carbon reduction technologies include cement clean production technologies(improving energy efficiency, using non carbon calcium raw materials, clean fuels, and clean electricity) and concrete composition optimization technologies(using low-carbon cementitious materials, mineral admixtures, and recycled aggregates). Indirect carbon reduction technology is mainly achieved by improving the durability of concrete. CCUS technology runs through various stages of the life-cycle of concrete. By injecting CO2 during concrete mixing and curing, as well as carbonation curing of recycled aggregates, carbon sequestration can be effectively achieved.

张菊辉,江慧.混凝土全生命周期减碳技术研究综述[J].混凝土与水泥制品,2025(8):106-110,116. ZHANG J H,JIANG H.A review of life-cycle carbon reduction technologies for concrete[J].China Concrete and Cement Products,2025(8):106-110,116.

摘   要：采用碳排放因子法，考虑混凝土原材料开采与加工、原材料运输和产品生产3个环节，开展了上海地区C20~C60预拌混凝土单位产品的碳排放量计算，并对其减碳潜力进行了量化分析。结果表明：原材料开采与加工环节的碳排放量最大，减碳潜力也最大，减碳贡献率大于90%；采用低碳矿物掺合料适量替代高碳排放的水泥、再生骨料适量替代天然骨料，可有效增强原材料开采与加工环节的减碳效果。Abstract: Using the carbon emission factor method, considering the three links of concrete raw material mining and processing, raw material transportation, and product production, the unit product carbon emissions of C20~C60 ready-mixed concrete in Shanghai were calculated, and its carbon reduction potential was quantitatively analyzed. The results indicate that the carbon emissions from raw material mining and processing are the highest, and the carbon reduction potential is also the greatest, with a carbon reduction contribution rate greater than 90%. Replacing high carbon emission cement with low-carbon mineral admixtures of appropriate content, and replacing natural aggregates with an appropriate content of recycled aggregates, can effectively enhance the carbon reduction effect of raw material mining and processing.

钱耀丽,韩云婷,杨光.上海地区预拌混凝土行业碳排放计算与减碳潜力分析[J].混凝土与水泥制品,2025(8):100-105. QIAN Y L,HAN Y T,YANG G.Carbon emission calculation and carbon reduction potential analysis of ready-mixed concrete industry in Shanghai[J].China Concrete and Cement Products,2025(8):100-105.

摘   要：设计制备了不同水固比（0.28~0.42）地质聚合物泡沫混凝土，分析了不同流变性能料浆中泡沫的受力性能和气孔结构特征，揭示了地质聚合物泡沫混凝土的成孔机理。结果表明：随着水固比的增加，净浆的初始和最终极限剪切应力均减小；泡沫在浆体内主要受到浆体黏滞产生的挤压力、浆体流动产生的浮力、泡沫液膜泌水产生的泌水力和泡沫与浆体之间的摩擦力作用；随着净浆极限剪切应力的减小，地质聚合物泡沫混凝土的孔径分层现象加剧，各层的泡沫平均Feret直径和孔隙率差异越来越大。Abstract: Geopolymer foamed concrete with different water-solid ratio(0.28~0.42) was designed and prepared. The mechanical properties and pore structure characteristics of foam in slurry with various rheological properties were analyzed, and the pore forming mechanism of geopolymer foamed concrete was revealed. The results indicate that as the water-solid ratio increases, the initial ultimate shear stress and final ultimate shear stress of the slurry decrease. The foam in the slurry is mainly affected by the squeezing force generated by the slurry viscosity, the buoyancy generated by the slurry flow, the bleeding generated by the bleeding of the foam liquid film, and the friction between the foam and the slurry. With the decrease of the ultimate shear stress of slurry, the pore size stratification of geopolymer foamed concrete intensifies, and the average Feret diameter of foam and porosity in each layer are more and more different.

童胜,王成云,胡爽子,等.料浆流变性能对地质聚合物泡沫混凝土成孔机理的影响[J].混凝土与水泥制品,2025(8):95-99. TONG S,WANG C Y,HU S Z,et al.Influence of rheological property of slurry on pore forming mechanism of geopolymer foamed concrete[J].China Concrete and Cement Products,2025(8):95-99.

摘   要：介绍了不同地区锂渣粉的性能差异，综述了其对混凝土力学性能的影响规律及其活性激发方式（物理激发、化学激发、高温激发），总结了其在混凝土中的作用机理（火山灰效应、填充效应、成核效应），指出了当前研究存在的不足，并对未来发展前景进行了展望。Abstract: The performance differences of lithium slag powder in different regions are introduced, and its effect on the mechanical properties of concrete and the activity activation modes (physical activation, chemical activation, high-temperature activation) are overviewed. The action mechanism of lithium slag powder in concrete(pozzolanic effect, filling effect, nucleation effect) is summarized, the shortcomings of the current research are pointed out, and the prospects for future development are outlooked.

范泽辉,杨隽.锂渣粉对混凝土力学性能影响研究进展[J].混凝土与水泥制品,2025(8):91-94. FAN Z H,YANG J.Research progress on the effect of lithium slag powder on the mechanical properties of concrete[J].China Concrete and Cement Products,2025(8):91-94.

摘   要：设计制备了不同强度等级（C30、C40、C50）的碱激发再生混凝土，研究了其抗硫酸侵蚀性能，并通过显微硬度试验揭示了其损伤机制。结果表明：随着干湿循环次数的增加，试件的抗压强度耐蚀系数先略微增大后减小；硫酸盐侵蚀会劣化混凝土的微观结构，导致骨料-新砂浆、新-旧砂浆界面的界面过渡区（ITZ）显微硬度降低，ITZ宽度增大；提高混凝土强度等级可在一定程度上改善混凝土的微观结构，提升抗硫酸盐侵蚀性能。Abstract: The alkali-activated recycled concrete with different strength grades (C30, C40, C50) was designed and prepared, and its resistance to sulfate attack was studied. The damage mechanism was revealed through microhardness testing. The results show that with the increase of wet-dry cycles, the corrosion resistance coefficient of compressive strength for the specimens first slightly increases and then decreases. Sulfate attack can degrade the microstructure of concrete, leading to a decrease in microhardness of interfacial transition zone(ITZ) and an increase in ITZ width between aggregate and new mortar, and new mortar and old mortar. Improving the strength grade of concrete can enhance the microstructure and improve the resistance to sulfate attack to some extent.

梁海波,姜迎春,魏兆赫,等.硫酸盐侵蚀环境下碱激发再生混凝土的ITZ显微硬度分析[J].混凝土与水泥制品,2025(8):87-90. LIANG H B,JIANG Y C,WEI Z H,et al.Analysis of ITZ microhardness of alkali-activated recycled concrete under sulfate attack environment[J].China Concrete and Cement Products,2025(8):87-90.