摘   要：介绍了国内外有关橡胶混凝土力学性能与耐久性能的研究进展，得出了掺入橡胶颗粒后混凝土的力学性能降低，而耐久性能改善的结论，提出了橡胶混凝土的未来研究方向。 Abstract: The research progress on the mechanical properties and durability of rubber concrete at home and abroad is introduced, and the conclusion that the mechanical properties of concrete are reduced after adding rubber particles, but the durability is improved is drawn, and the future research direction of rubber concrete is proposed.

郑邦容,唐延丰,李佳骏,等.橡胶混凝土力学性能与耐久性能研究进展[J].混凝土与水泥制品,2022(9):88-91. ZHENG B R,TANG Y F,LI J J,et al.Research Progress on Mechanical Properties and Durability of Rubber Concrete[J].China Concrete and Cement Products,2022(9):88-91.

摘   要：研究了废弃混凝土和废弃黏土砖制成的混合再生细骨料的掺量（0、30%、60%、100%）和预湿时长（0、1/6 h、24 h）对砂浆流动性、抗压强度、抗折强度和干燥收缩性能的影响。结果表明：砂浆的初始流动度和流动度经时损失率随着再生细骨料掺量和预湿时长的增加而降低；随着再生细骨料掺量的增加，砂浆的抗压强度降低，抗折强度变化较小；砂浆的抗压、抗折强度随着再生细骨料预湿时长的增加呈增大趋势；由于再生细骨料的内养护作用，砂浆的干燥收缩量随再生细骨料掺量和预湿时长的增加呈减小趋势。 Abstract: The effects of the content (0, 30%, 60%, 100%) and pre-wetting time (0, 1/6 h, 24 h) of mixed recycled fine aggregate made from waste concrete and waste clay bricks on the fluidity, compressive strength, flexural strength and drying shrinkage properties of mortar were studied. The results show that the initial fluidity and fluidity loss rate of mortar decrease with the increase of recycled fine aggregate content and pre-wetting time. With the increase of recycled fine aggregate content, the compressive strength of mortar decreases, and the change of flexural strength is small. The compressive and flexural strengths of mortar tend to increase with the increase of pre-wetting time of recycled fine aggregate. Due to the internal curing effect of recycled fine aggregate, the drying shrinkage of mortar decreases with the increase of recycled fine aggregate content and pre-wetting time.

马加存,杨永富,段淑芸,等.混合再生细骨料水泥砂浆性能试验研究[J].混凝土与水泥制品,2022(9):92-94,105. MA J C,YANG Y F,DUAN S Y,et al.Experimental Study on the Properties of Mixed Recycled Fine Aggregate Mortar[J].China Concrete and Cement Products,2022(9):92-94,105.

摘   要：研究了激发剂模数、养护方式和粉煤灰掺量对机制砂碱激发混凝土（MAAC）耐久性能的影响。结果表明：与20 ℃标养相比，60 ℃蒸养MAAC的收缩率降低明显，耐久性能增强；掺入20%粉煤灰后，MAAC的收缩性能有所改善，抗硫酸盐侵蚀性能有所减弱，但在蒸养条件下，掺入20%粉煤灰可以在一定程度上提高MAAC的抗氯离子侵蚀能力；随着碱激发剂模数由2.0降至1.8，MAAC的耐久性能有所增强。 Abstract: The effects of activator modulus, curing method and fly ash content on the durability of manufactured sand alkali-activated concrete(MAAC) were studied. The results show that compared with the standard curing at 20 ℃, the shrinkage rate of MAAC in steam curing at 60 ℃ is significantly reduced, and the durability is enhanced. After adding 20% fly ash, the shrinkage performance of MAAC is improved, the resistance to sulfate corrosion is weakened, but under steam curing conditions, adding 20% fly ash can improve the chloride ion corrosion resistance of MAAC to a certain extent. The durability of MAAC is enhanced with the decrease of alkali activator modulus from 2.0 to 1.8.

任君,王允波,徐伟伟,等.碱激发矿粉-粉煤灰混凝土耐久性能试验研究[J].混凝土与水泥制品,2022(9):95-98. REN J,WANG Y B,XU W W,et al.Experimental Study on Durability of Alkali-activated Mineral Powder and Fly Ash Concrete[J].China Concrete and Cement Products,2022(9):95-98.

摘   要：合理使用再生骨料有助于节约资源和改善环境，但再生骨料存在形状不规则、吸水率高、压碎指标大等问题，直接用到混凝土中会劣化混凝土的性能。对再生骨料进行改性可在一定程度上减小其与天然骨料之间的差距，从而减轻其对混凝土性能的不利影响。通过物理强化技术、化学强化技术和微生物矿化技术改性再生骨料的作用机理和改性效果介绍，为再生骨料在混凝土中的合理应用提供借鉴。 Abstract: The rational use of recycled aggregates can help save resources and improve the environment. However, recycled aggregates have problems such as irregular shape, high water absorption, and large crushing index. Direct use of recycled aggregates in concrete will deteriorate the performance of concrete. The modification of recycled aggregates can reduce the gap between recycled aggregates and natural aggregates to some extent, so as to reduce its adverse impact on the performance of concrete. The action mechanism and modification effect of modified recycled aggregates by physical strengthening technology, chemical strengthening technology and microbial mineralization technology are introduced, which can provide a reference for rational application of recycled aggregates in concrete.

王亚松,覃铃玲,李松,等.建筑垃圾再生骨料改性技术研究进展[J].混凝土与水泥制品,2022(9):99-105. WANG Y S,QIN L L,LI S,et al.Research Progress on Modification Technology of Construction Waste Recycled Aggregates[J].China Concrete and Cement Products,2022(9):99-105.

摘   要：基于港口在役混凝土结构的劣化过程和劣化状态建立了耐久性评定等级，从耐久性、经济性和可持续性角度对结构进行了层次化评价，其中，耐久性评估值N1包括结构形式和劣化指标评估值，采用加权平均法得到；经济性评估值N2包括日常检测维护成本、失效状态成本和经济损失成本，采取指标权重法确定；可持续性评估值N3选用指数函数进行计算；耐久性、经济性和可持续性指标的评估因子通过0-1强制评分法确定为1/2、1/3和1/6，经过加权得到了结构的层次化评估值。在层次化评估值的基础上给出了结构的检测维护框架模型，并通过某港口地区的在役混凝土桥梁结构验证了该框架模型的合理性。 Abstract: The durability evaluation grade is established based on the deterioration process and deterioration state of the in-service concrete structure in ports, and the structure is evaluated from the perspectives of durability, economy and sustainability. The durability evaluation value N1 includes the structural form and deterioration index evaluation value, which is obtained by weighted average method. Economic evaluation value N2 includes daily inspection and maintenance cost, failure state cost and economic loss cost, which is determined by index weight method. The sustainability evaluation value N3 is calculated by exponential function. The evaluation factors of durability, economy and sustainability indicators are determined as 1/2, 1/3 and 1/6 by 0-1 compulsory scoring method, and the hierarchical evaluation value of the structure is obtained by weighting. Based on the hierarchical evaluation value, the frame model of structure inspection and maintenance is given, and the rationality of the frame model is verified by the in-service concrete bridge structure in a port area.  

张灵灵,王海超,姜佩弦.港口在役混凝土结构的检测维护框架模型分析[J].混凝土与水泥制品,2022(9):82-87,91. ZHANG L L,WANG H C,JIANG P X.Analysis of Frame Model for Inspection and Maintenance of In-service Concrete Structure in Ports[J].China Concrete and Cement Products,2022(9):82-87,91.

摘   要：以纳米炭黑和膨胀珍珠岩为吸波剂和轻骨料，设计制备了层状结构轻质水泥基复合材料，采用弓形反射法研究其对X波段的微波吸收性能，并对其导热系数进行了测试。结果表明：与传统的阻抗渐变多层结构相比，所制备的层状结构水泥基材料具有更好的微波吸收性能，对X波段的电磁波反射率小于-15 dB；所制备的层状结构轻质水泥基复合材料具有显著的保温隔热功效。 Abstract: Layered structured lightweight cement-based composite was designed and fabricated using carbon black and expanded perlite as electromagnetic wave absorbent and lightweight aggregates. The electromagnetic wave absorption properties were studied by arching reflected method, and the thermal conductivity coefficient was tested. The results indicate that the prepared layered structured cement-based composites exhibit better electromagnetic wave absorption properties than the traditional gradient multi-layer structured cement-based composites. The reflectivity of layered structured cement-based composites can be less than -15 dB in the whole X-band. The prepared layered structured lightweight cement-based composites possess remarkable thermal insulation function.

解帅,贾治勇,曹延鑫,等.层状结构轻质隔热水泥基材料的吸波性能[J].混凝土与水泥制品,2022(9):62-65. XIE S,JIA Z Y,CAO Y X,et al.Electromagnetic Wave Absorbing Properties of Layered Structured Thermal Insulation Lightweight Cement-based Materials[J].China Concrete and Cement Products,2022(9):62-65.