摘   要：利用含红砖的再生细骨料100%替代天然砂，制备生态干混砂浆，研究了用水量、再生粉料掺量和外加剂掺量对干混砂浆力学性能的影响。结果表明：当再生粉料和外加剂掺量不变时，砂浆强度随着用水量的增大而降低，但56 d强度增长率反而增大；当再生粉料掺量和用水量不变时，外加剂掺量的增加对砂浆各龄期的强度均有负面影响；当外加剂掺量和用水量不变时，再生粉料掺量为20%时，对应的砂浆强度最大，低于或高于此掺量均会使砂浆强度降低；含红砖再生细骨料干混砂浆的后期强度（56 d）仍有较大提升空间。 Abstract: The dry mixed mortar was prepared with 100% recycled fine aggregate containing crushed red brick instead of natural sand. The effects of different water addition, recycled powder content and admixture content on the mechanical properties of dry mixed mortar were studied. The results show that when the recycled powder content and admixture content are constant, the strength of the mortar decreases with the increase of water addition, while the growth rate of 56 d strength increases. When the recycled powder content and the water addition remain unchanged, the increase of admixture content has a negative impact on the strength of the mortar at all ages. When the admixture content and the water addition remain unchanged, the mortar with 20% recycled powder has the highest strength, and the strength of the mortar is reduced when the content is lower or higher than 20%. There is still a large increase space in the late strength (56 d) of dry mixed mortar with red brick recycled fine aggregate.

高琦,肖建庄,赵艳娜,等.再生细骨料干混砂浆力学性能试验研究[J].混凝土与水泥制品,2021(3):93-96. GAO Q,XIAO J Z,ZHAO YN,et al.Experimental Study on Mechanical Properties of Dry Mixed Mortar with Recycled Fine Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):93-96.

摘   要：研究了再生粗骨料替代率和骨料包浆对自密实再生混凝土力学性能和抗氯离子渗透性的影响。结果表明：当再生粗骨料替代率分别为30%、60%、100%时，与未包浆再生骨料混凝土相比，预包浆再生骨料混凝土的坍落扩展度分别提高了0.76%、3.33%、5.17%，抗压强度分别提高了5.9%、3.2%、6.1%，劈裂抗拉强度分别提高了5.2%、11.2%、18.2%；随着再生粗骨料替代率的增加，混凝土的电通量值增大，当再生粗骨料替代率分别为30%、60%、100%时，与未包浆再生骨料混凝土相比，预包浆再生骨料混凝土的电通量值分别下降了16.7%、22.9%、8.6%；骨料经过包浆处理后，改善了自密实再生混凝土的力学性能及抗氯离子渗透性。 Abstract: The effects of recycled coarse aggregate replacement rate and aggregate grouting on the mechanical properties and resistance to chloride ion permeability of self-compact recycled concrete were studied. The results show that when the replacement rates of recycled coarse aggregate are 30%, 60% and 100%, compared with the ungrouted concrete, the slump-flow expansion of the grouted concrete are increased respectively by 0.76%, 3.33% and 5.17%, the compressive strength of the grouted concrete are increased respectively by 5.9%, 3.2% and 6.1%, the split tensile strength of the grouted concrete are increased respectively by 5.2%, 11.2% and 18.2%. With the increase of replacement rate of recycled coarse aggregate, the concrete electric flux value increases. When the replacement rates of recycled coarse aggregate are 30%, 60% and 100%, the electric flux values of the grouted recycled concrete decrease respectively by 16.7%, 22.9% and 8.6% compared with ungrouted concrete. The mechanical properties and resistance to chloride ion permeability of the self-compacting recycled concrete are improved after the aggregates are grouted.

金宝宏,宋牧原,谢鑫,等.预包浆再生骨料自密实混凝土力学与抗氯离子渗透性研究[J].混凝土与水泥制品,2021(3):97-100. JIN B H,SONG M Y,XIE X,et al.Study on Mechanical Properties and Resistance to Chloride Ion Permeability of Self-compacting Concrete with Pre-grouted Recycled Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):97-100.

摘   要：预应力混凝土钢管桁架叠合板是一种新型叠合板，具有质量轻、承载能力强、抗裂性能好以及生产效率高等优点。以江苏省企业标准设计图集《预应力混凝土钢管桁架叠合板》的编制为背景，介绍了该产品的计算、构造相关规定及生产、制作相关要求，分析了该产品的特点，并提出了下一步研究方向。 Abstract: Prestressed concrete composite slab with grouted steel pipe trusses is a new type of composite plate, which has the advantages of light weight, strong bearing capacity, good crack resistance and high production efficiency. Based on the compilation of Jiangsu Province enterprise standard design atlas Prestressed Concrete Composite Slab with Grouted Steel Pipetrusses, the calculation, construction and production requirements of the product are introduced, the characteristics of the product is analyzed, and the next research direction is put forward.

郭健,吉成,金如元,等.预应力混凝土钢管桁架叠合板的研究与应用[J].混凝土与水泥制品,2021(3):66-68,75. GUO J,JI C,JIN R Y,et al.Research and Application of Prestressed Concrete Composite Slabs with Grouted Steel Pipe Trusses[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):66-68,75.

摘   要：整体装配式地下车站叠合式墙板存在大面积预制混凝土板与现浇混凝土如何有机结合、解决现浇混凝土裂缝和墙体渗漏的问题，这与传统现浇混凝土施工工艺存在较大差异，其具体实施过程中将面临很多新的结构、材料和施工技术方面的问题。针对某城市轨道交通地铁车站建设的需要，基于现有大面积混凝土收缩裂缝和新老混凝土约束裂缝现状和控制技术研究成果，从结构设计、混凝土材料、施工技术三方面，探讨并提出了地下车站整体装配式叠合墙板裂缝控制的有效措施。 Abstract: The integrally assembled underground station laminated wall panel has the problems of how to organically combine the large area of precast concrete slab and cast-in-place concrete, and how to solve the problems of cast-in-place concrete cracks and wall leakage, which is different from the traditional cast-in-place concrete construction process. During its specific implementation process, it will face many new structural, material and construction technology issues. In view of the needs of the construction of a certain urban rail transit subway station, based on the existing large-area concrete shrinkage cracks and the new and old concrete restraint cracks status and control technology research results, from the three aspects of structural design, concrete materials, construction technology, the underground stations effective measures for crack control of integrally assembled laminated wall panels are discussed and put forward.

刘毅,潘清,张明亮,等.地铁车站叠合式墙板收缩裂缝控制技术研究进展[J].混凝土与水泥制品,2021(3):69-75. LIU Y,PAN Q,ZHANG M L,et al.Research Progress of Shrinkage Crack Control Technology of Laminated Wall Panel in Subway Station[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):69-75.

摘   要：在已有试验基础上，进行了基于内聚力模型的密肋复合墙板静力加载全过程有限元分析，研究了密肋复合墙板结构在粮食侧压力作用下的受力机理。结果表明：黏结界面开裂后，基于内聚力模型的密肋复合墙板在协同受力作用下表现出“拱”破坏形式；黏结界面损伤主要分布在跨中板底及板顶与边肋梁、柱接触区域，损伤及位移模拟结果与试验结果一致；基于内聚力模型的密肋复合墙板具有与矩形双向板相似的塑性铰线破坏特征，验证了内聚力模型的合理性，为粮食平房仓密肋复合墙板的结构计算分析提供了参考。 Abstract: On the basis of the existing tests, the finite element analysis of the whole process of static loading of multi-ribbed composite wall was carried out based on the cohesion model, and the mechanical mechanism and the finite element calculation method of multi-ribbed composite wall structure under the lateral pressure of grain were studied. The results show that after the interface cracks, the ribbed composite wall based on cohesion model shows “arch” failure mode under the synergistic force. The damage of the bond interface is mainly distributed in the area between the bottom and top of the mid-span plate with the side rib-beam and rib-column. Based on the cohesive model, the multi-ribbed composite wall has similar failure characteristics of yield line to the rectangular two-way plate, which verifies the rationality of the cohesive model,  and provides a reference for the calculation and analysis of the multi-ribbed composite wall board structure in storehouse.

丁永刚,王浩然,赵金全,等.粮食侧压力作用下密肋复合墙板肋格单元数值模拟[J].混凝土与水泥制品,2021(3):76-81. DING Y G,WANG H R,ZHAO J Q,et al.Numerical Simulation of Multi-ribbed Composite Wall Cells Under Lateral Pressure of Grain[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):76-81.

秦彦帅,曲艳东,李继野,等.爆炸冲击载荷下钢板-混凝土组合结构的动态性能和破坏机理研究进展[J].混凝土与水泥制品,2021(3):82-87. QIN Y S,QU Y D,LI Ji-ye,et al.Research Progress on Dynamic Performances of Steel Plate-concrete Composite Structures Under Blast Loads[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):82-87.