为了进一步提高建筑业生产效率，研究员研发出了水泥基材料3D打印这一新型增材制造技术，在房屋建筑、道路桥梁、地下工程等建造领域取得了显著的发展，并表现出较大的发展潜力。马国伟、王里编著的《水泥基材料3D打印关键技术》一书系统地归纳了水泥基材料3D打印工艺建模的最新进展，提出了水泥基材料3D可打印性的量化指标，研究了打印微观结构的力学各向异性，提出了3D打印结构的整体性增强方法，并对该项技术进行了展望。笔者通过对该书的学习，认为其内容详实、可读性强，总结要点如下。

摘   要：研究了钢渣和粉煤灰对C30重晶石防辐射混凝土工作性、力学性能、收缩性能、抗冻性能、抗碳化性能以及抗渗性能的影响。结果表明：重混凝土的坍落度随粉煤灰掺量的增加而增加，随钢渣掺量的增加而降低；重混凝土的28 d抗压强度随粉煤灰掺量的增加而先增加后降低，粉煤灰掺量为30%时，28 d抗压强度最大；重混凝土的收缩随钢渣和粉煤灰掺量的增加而降低，粉煤灰掺量为40%、钢渣掺量为30%时重混凝土的60 d收缩最小，为191 με；钢渣掺量为30%、粉煤灰掺量为40%时重混凝土冻融循环后的相对动弹性模量降低最小，抗冻性能最好；重混凝土的28 d碳化深度随粉煤灰掺量的增加而线性增加；重混凝土的渗水高度随钢渣和粉煤灰掺量的增加而降低，粉煤灰掺量为40%、钢渣掺量为30%的重混凝土渗水高度最小，为基准组的9.3%，抗渗性能大幅提高。 Abstract: The influence of steel slag and fly ash on the workability, mechanical properties, shrinkage, frost resistance, carbonation resistance and water permeability of C30 barite shield concrete was studied. The results show that the slump of heavy concrete increases with the increase of fly ash content, and decreases with the increase of steel slag content. The 28 d compressive strength of heavy concrete increases first and then decreases with fly ash content, and when the fly ash content is 30%, the 28 d compressive strength is the highest. The shrinkage of heavy concrete decreases with the addition of steel slag and fly ash, and when fly ash content is 40%, steel slag content is 30%, the shrinkage of heavy concrete at 60 d is the lowest, which is 191 με. When steel slag content is 30% and fly ash content is 40%, the relative dynamic elastic modulus of heavy concrete after freeze-thawing cycle decreases the least and the frost resistance is the best. The 28 d carbonation depth of heavy concrete increases linearly with fly ash content. The water seepage depth of heavy concrete decreases with the addition of fly ash and steel slag, and when fly ash content is 40%, steel slag content is 30%, the heavy concrete has the lowest water seepage depth, which is 9.3% of the reference heavy concrete, and the water seepage performance is greatly improved.

侯景鹏, 陈群,史巍,等.钢渣和粉煤灰对重混凝土性能的影响[J].混凝土与水泥制品,2020(11):92-95. HOU J P,CHEN Q,SHI W,et al.Effect of Steel Slag and Fly Ash on the Performance of Heavy Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):92-95.

摘   要：利用钙基膨润土和石灰石粉部分取代水泥，研究了不同掺量的膨润土、石灰石粉对珊瑚混凝土力学性能与耐久性能的影响。结果表明：复掺膨润土和石灰石粉可明显提高珊瑚混凝土的抗压强度和劈裂抗拉强度，且当膨润土掺量为15%时达到最大值；复掺膨润土和石灰石粉可有效提高珊瑚混凝土的抗Cl-渗透性和抗硫酸盐侵蚀能力，且二者的最佳掺量均为15%。 Abstract: The effects of calcium-based bentonite and limestone powder on the mechanical properties and durability of coral concrete were studied by partially substituting cement powder with bentonite and limestone powder. The results show that the compounding of bentonite and limestone powder can significantly improve the compressive strength and splitting tensile strength of coral concrete, and reach the maximum value when the amount of bentonite is 15%. Moreover, the compounding of bentonite and limestone powder can effectively improve the resistance of coral concrete to chloride ion permeability and sulfate resistance, and the optimal content of both is 15%.  

贾慧娜,李亚丽,张舜泉.膨润土和石灰石粉对珊瑚混凝土力学与耐久性能的影响[J].混凝土与水泥制品,2020(11):87-91. JIA H N,LI Y L,ZHANG S Q.Experimental Study on the Mechanical Properties and Durability of Coral Concrete Mixed with Bentonite and Limestone Powder[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11): 87-91.

摘   要：透水混凝土是“海绵城市”理念中的重要一环，对于减轻排水系统负担、缓解城市热岛效应、吸声降噪等具有积极作用。外掺材料的不同直接影响透水混凝土的力学性能、透水性能、抗冻融性能等，基于此，叙述了传统化学外加剂、复掺矿物掺合料和化学外加剂、树脂类聚合物改性剂、增强增韧材料对透水混凝土性能的影响，并对其研究方向进行了展望。 Abstract: Pervious concrete is an important part of the concept of "sponge city", which plays a positive role in reducing the burden of drainage system, alleviating the urban heat island effect, and absorbing noise. The different admixture materials directly affect the mechanical properties, water permeability and freeze-thaw resistance of pervious concrete. On this basis, the effects of traditional chemical admixtures, mixing of mineral admixture and chemical admixture, resin polymer modifiers, and reinforcement and toughening materials on the properties of pervious concrete are described, and their research directions are prospected.

崔征,王达道,徐志峰,等.外掺材料对透水混凝土性能影响的研究进展[J].混凝土与水泥制品,2020(11):83-86,91. CUI Z,WANG D D,XU Z F,et al.Research Progress on the Effects of Admixture Materials on the Properties of Pervious Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11): 83-86,91.

摘  要：新制订的国家标准GB 38263—2019《水泥制品单位产品能源消耗限额》已于2020年5月正式实施。为便于该标准的使用方准确理解标准条款的具体含义，正确贯彻实施标准条款的具体要求和规定，介绍了该标准的制订过程，并对标准的主要条款及其制订理由进行了解释和说明。 Abstract: The newly formulated national standard GB 38263—2019 The Norm of Energy Consumption Per Unit Throughout of Cement Products has been officially implemented in May 2020. In order to facilitate users of the standard to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the formulation process of the standard, and explains the main provisions of the standard and the reasons for its revision are introduced.  

田寅,匡红杰.GB 38263—2019《水泥制品单位产品能源消耗限额》标准解读[J].混凝土与水泥制品,2020(11):79-82. TIAN Y,KUANG H J.Interpretation of GB 38263—2019 The Norm of Energy Consumption Per Unit Throughout of Cement Products[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):79-82.

摘   要：针对玻化微珠外墙外保温系统服役过程存在的病害特征，利用非金属超声检测仪测试了该系统在室内加速老化过程的劣化特征信号，对比分析了系统老化状态对不同部位的超声波波速、频率特征信号的影响，研究了不同热雨循环阶段该系统的超声波信号特征与宏观裂缝位置的对应性。结果表明：对于不同热雨循环下的玻化微珠外墙外保温系统，超声波信号异常位置与裂缝位置具有较好的对应性，系统饰面层的劣化特征与超声波波速信号异常数量的增长趋势一致，据此可实现该系统劣化阶段的无损检测；随着热雨循环次数的增加，超声波信号频率中心由低频向高频转移。 Abstract: Aiming at the disease characteristics of the external thermal insulation composite systems with glazed hollow bead (ETICS-GHB) during the service process, the degradation characteristic signals of the ETICS-GHB were carried out by a non-metallic ultrasonic detector in accelerated aging process indoors. The ultrasonic wave velocity and frequency characteristic signals of different parts of the ETICS-GHB were studied at different aging state. The relationship between ultrasonic signal characteristics and macro cracks location of this system in different heat-rain cycle stages was analyzed. The results show that the abnormal position of the ultrasonic signal has a good correspondence with the crack location for the ETICS-GHB under different heat-rain cycles, and the deterioration characteristics of the finish coating of the ETICS-GHB are consistent with the increasing number of abnormal ultrasonic wave velocity signals, and the degradation level of the ETICS-GHB can be achieved by the non-destructive testing. With the increase of heat-rain cycles, the frequency center of the ultrasonic signal shifts from low frequency to high frequency.

叶家辉,田静静,熊厚仁,等.基于超声波技术的玻化微珠外墙外保温系统劣化特征研究[J].混凝土与水泥制品,2020(11):74-78. YE J H,TIAN J J,XIONG H R,et al.Research on Deterioration Characteristics of External Thermal Insulation Composite Systems with Glazed Hollow Bead Based on Ultrasonic Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11): 74-78.