摘   要：采用自制有机聚合物聚乙烯醇与无机纳米SiO2杂化改性材料对再生粗骨料进行强化处理，研究了不同强化方式（浸泡、喷洒）对再生粗骨料堆积密度、表观密度、吸水率和压碎指标的影响，其中，浸泡强化时间分别为1、2、3、5、8、12、24、36、48 h，喷洒次数分别为1、2、3次，并分析了强化机理。结果表明：与天然粗骨料相比，未强化再生粗骨料的表观密度、堆积密度均较低，压碎指标、24 h吸水率均较大；随着浸泡强化时间的增加，再生粗骨料的表观密度变化不大，2 h、24 h吸水率基本呈先降低后略微增大的趋势，压碎指标基本呈降低趋势；随着喷洒次数的增加，再生粗骨料的表观密度变化不大，但2 h、24 h吸水率和压碎指标均呈降低趋势。Abstract: Self made hybrid modified material of organic polymer polyvinyl alcohol and inorganic nano SiO2 was used to strengthen recycled coarse aggregates. The effects of different strengthening methods (soaking, spraying) on the bulk density, apparent density, water absorption rate, and crushing index of recycled coarse aggregates were studied. The soaking strengthening time was 1, 2, 3, 5, 8, 12, 24, 36, 48 h, and the spraying frequency was 1, 2, 3 times, respectively. The strengthening mechanism was analyzed. The results show that compared with natural coarse aggregate, unreinforced recycled coarse aggregate has lower apparent density and bulk density, and higher crushing index and 24 h water absorption rate. With the increase of soaking strengthening time, the apparent density of recycled coarse aggregate does not change significantly, the 2 h and 24 h water absorption rate show a trend of first decreasing and then slightly increasing, and the crushing index shows a decreasing trend. With the increase of spraying frequency, the apparent density of recycled coarse aggregate does not change significantly, but the 2 h and 24 h water absorption rate and crushing index decrease.

杨正松,辛晓婷,辛继宝,等.有机聚合物聚乙烯醇与无机纳米SiO2杂化改性材料对再生骨料性能强化的影响研究[J].混凝土与水泥制品,2025(10):116-121. YANG Z S,XIN X T,XIN J B,et al.Study on effect of hybrid modified materials of organic polymer polyvinyl alcohol and inorganic nano SiO2 on performance enhancement of recycled aggregates[J].China Concrete and Cement Products,2025(10):116-121.

摘   要：研究了陶粒作为载体对微生物（枯草芽孢杆菌）活性与矿化能力的影响，探究了陶粒掺量（40%、45%、50%、55%、60%、65%）对混凝土力学性能及微生物浓度（2.15×104、2.15×105、2.15×106、2.15×107 mol/L）对自修复混凝土自修复性能的影响。结果表明：陶粒对微生物具有较好的保护作用，且对微生物的矿化能力影响较小；随着未固载微生物陶粒、固载微生物陶粒掺量的增加，混凝土的7 d、28 d抗压和抗折强度基本先增后降，当陶粒掺量均为45%时，混凝土的28 d力学性能最高；随着微生物浓度的增加，试件的抗压强度恢复率、裂缝完全愈合率、平均裂缝修复宽度、最大裂缝修复宽度基本先增后降，24 h吸水率先降后增；综合考虑自修复混凝土的力学性能及自修复效果，推荐陶粒的掺量为45%，微生物浓度为2.15×105 mol/L。Abstract: The effects of ceramic particle as the carrier on the activity and mineralization capacity of microbial (bacillus subtilis) were investigated. The influence of ceramic particle content (40%, 45%, 50%, 55%, 60%, 65%) on concrete mechanical properties and microbial concentrations (2.15×104, 2.15×105, 2.15×106, 2.15×107 mol/L) on the self-healing performance of self-healing concrete was studied. The results show that ceramic particle has a better protective effect on microbial and has a relatively minor impact on microbial mineralization capacity. As the content of ceramic particle without microbial immobilization and immobilized microbial ceramic particle increases, the 7 d and 28 d compressive and flexural strengths of concrete generally first increase and then decrease. When the ceramic particle content is 45%, the 28 d mechanical properties of concrete are highest. With the increase of microbial concentration, the compressive strength recovery rate, complete crack healing rate, average crack repair width and maximum crack repair width of the specimens generally first increase and then decrease, while the 24 h water absorption rate first decreases and then increases. Considering the mechanical properties and self-healing effects of the self-healing concrete comprehensively, the recommended content of ceramic particle is 45%, and the microbial concentration is 2.15×105 mol/L.

郭卓民,费爱萍,张铁志.陶粒轻骨料自修复混凝土的制备及其自修复性能研究[J].混凝土与水泥制品,2025(10):122-129 GUO Z M,FEI A P,ZHANG T Z.Study on preparation and self-healing performance of self-healing concrete with ceramic particle lightweight aggregate[J].China Concrete and Cement Products,2025(10):122-129.

彭胜,刘广.基于多种机器学习算法的CFRP加固损伤再生骨料混凝土抗压强度预测[J].混凝土与水泥制品,2025(10):130-135,159. PENG S,LIU G.Prediction of compressive strength of CFRP reinforced damaged recycled aggregate concrete based on multiple machine learning Algorithms[J].China Concrete and Cement Products,2025(10):130-135,159.

摘   要：从理论模型和组成原材料两方面介绍了粗骨料超高性能混凝土（Ultra-high performance concrete containing coarse aggregates，UHPC-CA）的设计方法，分析了粗骨料的种类、粒径、含量等对UHPC-CA抗压、抗拉、弯曲和收缩性能的调控作用，并对其未来研究方向进行了展望，为UHPC-CA的设计和工程应用提供了理论支撑。Abstract: The design method of ultra-high performance concrete containing coarse aggregates (UHPC-CA) from two aspects of theoretical model and raw material composition is introduced. The regulating effects of the type, particle size, and content of coarse aggregates on the compressive, tensile, bending, and shrinkage properties of UHPC-CA are analyzed, and future research directions are discussed, which can provide theoretical support for the design and engineering application of UHPC-CA.

王庆平,程志伟,蔡婧怡,等.粗骨料超高性能混凝土（UHPC-CA）的设计方法、力学与收缩性能研究进展[J].混凝土与水泥制品,2025(10):136-142. WANG Q P,CHENG Z W,CAI J Y,et al.Research progress on design methods, mechanical and shrinkage properties of ultra-high performance concrete containing coarse aggregates (UHPC-CA)[J].China Concrete and Cement Products,2025(10):136.142.

摘   要：总结了未经处理的再生骨料存在的性能缺陷，解析了碳化处理对其表观密度、吸水率及压碎指标的改善效果及作用机理，分析了碳化再生骨料对普通混凝土（Normal concrete，NC）与超高性能混凝土（Ultra- high performance concrete，UHPC）工作性、抗压强度及自收缩的影响规律，指出了当前研究的不足，并展望了未来研究的发展方向。Abstract: The performance defects of untreated recycled aggregates are summarized, and the improvement effects and mechanisms of carbonation treatment on the apparent density, water absorption rate, and crushing index of recycled aggregates are analyzed. The influence patterns of carbonated recycled aggregates on the workability, compressive strength, and self-shrinkage of normal concrete (NC) and ultra-high performance concrete (UHPC) are analyzed. The shortcomings of current research are pointed out, and future research directions are prospected.

李俊霆,陈雨佳,郑舒畅,等.碳化再生骨料的性能及其对混凝土性能影响研究综述[J].混凝土与水泥制品,2025(10):143-149. LI J T,CHEN Y J,ZHENG S C,et al.A review of the performance of carbonized recycled aggregate and its effect on concrete properties[J].China Concrete and Cement Products,2025(10):143-149.

摘   要：基于我国砂石行业发展现状和趋势，从产业布局、工艺技术、产品品质、物流运输以及砂源替代等多方面切入，分析了砂石骨料全产业过程，并提出了绿色低碳发展的方向和关键点。Abstract: On the basis of the current situation and trend of the development of Chinese sand and gravel industry, the whole industrial process of sand and gravel aggregate is analyzed, and the direction and key points of green and low-carbon development are put forward from the aspects of industrial layout, process technology, product quality, logistics and transportation, as well as sand source substitution.

赵慧林.混凝土砂石骨料行业绿色低碳发展趋势概述[J].混凝土与水泥制品,2025(10):150-153. ZHAO H L.Overview of green and low-carbon development trends in the concrete sand and gravel aggregate industry[J].China Concrete and Cement Products,2025(10):150-153.