倪红.固体废弃物的资源化利用——评《固体废弃物在绿色建材中的应用》[J].混凝土与水泥制品,2020(12):96-97.

摘   要：研究了铁尾矿砂取代率对机制砂混凝土工作性、力学性能和耐久性能的影响。结果表明：当铁尾矿砂取代率为40%时，混合砂的颗粒级配及细度模数与河砂相近，此时，混合砂混凝土的工作性和力学性能最优；随着铁尾矿砂取代率在一定范围内增加，混凝土的抗渗性能和抗氯离子侵蚀性能逐步提升。 Abstract: The effect of iron tailings sand replacement rate on the workability, mechanical properties and durability of machined sand concrete was studied. The results show that when the iron tailings sand replacement rate is 40%, the particle size gradation and fineness modulus of the mixed sand are similar to those of river sand. The concrete prepared by the mixed sand shows good workability and mechanical properties. In addition, as the iron tailings sand replacement rate increases within a certain range, the impermeability and the resistance to chloride ion erosion of concrete are gradually improved.

刘文燕,张友来,李绍纯,等.铁尾矿砂对机制砂混凝土性能的影响研究[J].混凝土与水泥制品,2020(12):84-86. LIU W Y,ZHANG Y L,LI S C,et al.Research on the Influence of Iron Tailings Sand on the Performance of Machined Sand Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):84-86.

摘   要：再生混凝土骨料（RCA）表层砂浆的多孔性和高吸水性对再生骨料混凝土的力学性能和耐久性能不利，去除和强化RCA表层砂浆是提高RCA性能的两种主要方法。基于此，总结了聚合物、硅酸钠、微粉、CO2碳化、微生物碳酸盐沉积等RCA表层附着砂浆强化方法的研究现状，分析了各RCA强化方法的优缺点，并提出了有待进一步研究的问题，以推进再生混凝土的应用。 Abstract: The porosity and high water absorption of recycled concrete aggregate (RCA) surface mortar are detrimental to the mechanical properties and durability of recycled aggregate concrete. Removal and modification of RCA surface mortar are the two main ways to improve RCA performance. Based on this, the progress on various modification approaches of RCA surface mortar such as polymer coating, sodium silicate modification, micro-powder filling, CO2 carbonation and microbial carbonate deposition is summarized, the advantages and disadvantages of each RCA modification method are analyzed, and the problems to be further studied are put forward to promote the application of recycled concrete.

梁超锋,杜孝敏,裘锦瑜,等.再生混凝土骨料强化方法研究进展[J].混凝土与水泥制品,2020(12):87-91. LIANG C F,DU X M,QIU J Y,et al.Research Progress on Modification Methods of Recycled Concrete Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):87-91.

摘   要：分析了生活垃圾焚烧炉渣的各项性能指标，并将其经多道水洗、筛分等工艺制成再生骨料，利用再生骨料取代天然砂石制备了透水混凝土。结果表明：生活垃圾焚烧炉渣的粒径分布较优，基本满足Ⅱ类建设用砂标准要求；再生骨料透水混凝土的抗压强度均低于基准组，透水系数均大于10 mm/s；随着再生骨料（处理后）取代率的增加，试件的28 d抗压强度逐渐降低；在取代率为100%的情况下，与未处理再生骨料透水混凝土相比，处理后再生骨料透水混凝土的抗压强度提高了43.1%。 Abstract:  The various indicators of the domestic waste incinerator slag were analyzed, and it was prepared into recycled aggregate through multiple washing, screening and other processes, and the pervious concrete was prepared by using recycled aggregate instead of natural sand. The results show that the domestic waste incinerator slag basically meets the requirements of Type Ⅱ construction sand standard, and the particle size distribution is better. The compressive strength of recycled aggregate pervious concrete is lower than that of reference group. The permeability coefficient of recycled aggregate pervious concrete is greater than 10 mm/s. With the increase of the replacement rate of recycled aggregate (after treatment), the 28 d compressive strength of specimen gradually decreases. When the replacement rate is 100%, compared with the untreated recycled aggregate pervious concrete, the compressive strength of the treated recycled aggregate pervious concrete is increased by 43.1%.

张立力,谢一飞,刘增喜,等.生活垃圾焚烧炉渣在透水混凝土中的应用[J].混凝土与水泥制品,2020(12):92-95. ZHANG L L,XIE Y F,LIU Z X,et al.Experimental Research on Application of Domestic Waste Incinerator Slag in Pervious Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):92-95.

摘   要：利用ASTM C1202法、NT Build 492/RCM法及NEL法对三种市售超高性能混凝土（UHPC）基体预混料的渗透性进行了检测，以分析其适用性。结果表明：ASTM C1202电量法的测试结果均在100 C以下，难以进行更加细致的区分；NT Build 492/RCM电迁移法即使在60 V下通电500 h，试件中的氯离子显色深度也多在2 mm以内，由显色深度读数引起的测试误差较大；NEL饱盐电导率法的测试结果与现有研究结果基本吻合，考虑测试结果的区分度，该法仍是UHPC渗透性检测的首选之法，但其可靠性仍需更多的实践检验；对于无需测试氯离子扩散系数的场合，可直接采用规定测试条件下的试件电导率（或电阻率）来比较材料的渗透性高低。 Abstract: The ASTM C1202, NT Build 492/RCM and NEL test methods were used to compare the permeability of three commercial ultra-high performance concrete(UHPC) matrix premixes, and the applicability of these methods was analyzed. The results show that the ASTM C1202 electric charge method is mostly below 100 C, and it is difficult to make a more detailed distinction. For the NT Build 492/RCM electric migration test method, the chloride penetration depths after 500 h at 60 V are mostly within 2 mm together with large reading errors causing unavoidable fluctuations. The results of the NEL salt saturated conductivity method are basically consistent with the data reported in the literature, and considering the principle and the resolution, the NEL method is currently the preferred method for UHPC permeability evaluation even though its reliability still needs further practical inspections. For those cases the chloride diffusivities unnecessary, the electrical conductivity or resistivity of the UHPC can be directly employed to compare its permeability under the same testing conditions.

王增浩,魏宇桐,路新瀛.超高性能混凝土渗透性的三种电测方法比较[J].混凝土与水泥制品,2020(12):79-83. WANG Z H,WEI Y T,LU X Y.Comparison of Three Electrical Testing Methods for Evaluation of Permeability of Ultra-high Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,(12):79-83.

摘   要：为满足生产工艺要求，考虑原有生产车间特点，研发了可扩展组合式长线台座法预制构件生产线，并重点阐述了振捣和侧翻一体化设备、移动式装备摆渡设备、自行移动式边模、钢筋运输安装一体化设备等可移动式装备的构造要求，以期为预制构件生产线及装备的研发与应用提供参考和借鉴。 Abstract: In order to meet requirements of production process and considering characteristics of the original workshop, the expandable combined long line pedestal prefabricated component production line is developed. The structural requirements of movable equipment such as vibration and rollover integrated equipment, mobile equipment ferry equipment, self-propelled side formwork and integrated equipment for steel transportation and installation are elaborated to provide a reference for remodeler and application of traditional prefabricated component production line. 

杨佳林,朱敏涛,周强.可扩展组合式长线台座法预制构件生产线的研发与应用[J].混凝土与水泥制品,2020(12):76-78. YANG J L,ZHU M T,ZHOU Q.Research and Application of Expandable Combined Long Line Pedestal Prefabricated Component Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):76-78.