我国混凝土工程建设飞速发展，水泥用量与日俱增。而生产水泥需要消耗大量能源，这与国家的绿色环保政策背道而驰。矸石电厂用的煤矸石燃烧后灰分较高，粉煤灰的产出量是燃煤电厂的2倍左右，产出的粉煤灰含碳量高，理化特性与燃煤电厂粉煤灰差别较大，且造成了严重的环境污染和土地资源浪费。矸石电厂粉煤灰的循环利用已逐渐引起了学术界的关注，成为了研究热点。陈杰编著的《矸石电厂粉煤灰的活化及应用》一书通过对矸石电厂粉煤灰的形貌特征、化学成分、矿物组成等进行分析，采用化学、物理和物理化学活化技术对粉煤灰-水泥胶砂体系进行激活，得出了合理的活化方案；此外，以矸石电厂粉煤灰取代水泥制造粉煤灰基膏体充填材料，实现废物循环利用。笔者通过学习，认为该书具有较强的实用性，对于实现循环经济具有一定的指导意义，现简要总结重点内容。

冯月娥.矸石电厂粉煤灰的活化及应用技术——评《矸石电厂粉煤灰的活化及应用》[J].混凝土与水泥制品,2021(4):103.

摘   要：基于计算机图像处理技术，从掺锂渣再生混凝土的CT图像中提取出孔隙结构，利用IPP和FractalFox软件对不同再生粗骨料取代率和不同锂渣掺量立方体试件的孔隙率、分形维数、形状因子进行了计算与统计，并对孔隙特征与立方体抗压强度进行了关联性研究。结果表明：掺锂渣再生混凝土的孔隙率与立方体抗压强度满足三次方程关系；一定范围内，孔隙形状因子与抗压强度之间的关联性良好。 Abstract: Based on the computer image processing technology, the pore structure from CT images of recycled concrete with lithium slag was extracted. The porosity, fractal dimension and shape factor of cube specimens with different recycled coarse aggregate replacement rate and different lithium slag content were calculated and counted by IPP and FractalFox software, and the relationship between the three factors and cube compressive strength was studied. The results show that the porosity and compressive strength of recycled concrete with lithium slag satisfy the cubic equation relationship. There is a good correlation between the pore shape factor and compressive strength within a certain range.

陈洁静,秦拥军,卢义.掺锂渣再生混凝土细观结构与抗压强度关系研究[J].混凝土与水泥制品,2021(4):88-93. CHEN J J,QIN Y J,LU Y.Study on the Relationship Between Microstructure and Compressive Strength of Recycled Concrete with Lithium Slag[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):88-93.

摘   要：为了研究再生混凝土内部损伤随应力变化的演变规律，基于声发射技术对龄期为14 d、28 d、60 d的不同再生粗骨料替代率和不同粉煤灰掺量的混凝土进行了动态检测，获得了表征掺粉煤灰再生混凝土损伤演化过程的典型能量-应力图、撞击累计数-应力曲线以及声发射损伤定位图，探究了再生粗骨料替代率、粉煤灰掺量和龄期对声发射参数的影响，揭示了各应力阶段与内部损伤情况的关系。结果表明：再生粗骨料替代率越高，压密阶段占整个应力上升阶段的时间越长，由1/5上升到1/2，且各阶段的划分不突出，应力破坏阶段相应提前；掺加适量的粉煤灰可以密实再生混凝土内部的初始缺陷，但是，当粉煤灰掺量为30%时，试块在塑性阶段的撞击累计数开始出现剧增现象，使得捕捉材料破坏的预兆信息提前；不同龄期对再生混凝土的内部初始缺陷有一定影响，尤其体现在压密阶段和破坏阶段的撞击累计数上。 Abstract: In order to study the evolvement rule of the internal damage of recycled concrete with the change of stress caused by the initial defect, based on acoustic emission technology, dynamic monitoring was conducted for concrete with different recycled coarse aggregate replacement rate and different fly ash content with ages of 14 d, 28 d and 60 d. The typical energy-strain impact cumulative stress curve and acoustic emission damage location diagram representing the damage evolution process of recycled concrete with fly ash were obtained. The influence of recycled coarse aggregate replacement rate, fly ash content and age on acoustic emission parameters was explored, and the relationship between each stress stage and internal damage was revealed. The results show that the higher the recycled coarse aggregate replacement rate, the longer the compaction stage takes up in the whole stress rising stage, from 1/5 to 1/2, and the division of each stage is not convex, and the stress failure stage is corresponding to the premise. Adding appropriate amount of fly ash can compact the internal defects of recycled concrete. However, when the fly ash content is 30%, the cumulative number of impacts of test block in the plastic phase begins to increase dramatically, which leads to the advance of capturing the foreshadowing information of material failure. Different ages have a certain influence on the internal initial defects of recycled concrete, especially in the cumulative impact of compaction stage and failure stage.

张仕桦,刘京红,刘婷,等.掺粉煤灰再生混凝土声发射检测试验研究[J].混凝土与水泥制品,2021(4):94-98. ZHANG S H,LIU J H,LIU T,et al.Acoustic Emission Detection Experimental Study on Recycled Concrete with Fly Ash[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):94-98.

摘   要：利用再生骨料制备再生混凝土作为玻璃纤维增强水泥（GRC）挂板的装饰层，分别从挂板的组成、物理性能和力学性能方面进行了试验和分析。结果表明：与传统挂板相比，GRC再生混凝土装饰挂板更加轻薄，具有优良的物理性能和力学性能。 Abstract: The decorative layer of the glass fiber reinforced cement (GRC) panel was made of recycled aggregate concrete, and the composition, physical and mechanical properties of the panel were tested and analyzed. The results show that compared with the traditional panel, GRC recycled concrete decorative panel is lighter and thinner, and has excellent physical and mechanical properties.

肖建庄,侯逸青,张宝贵,等.GRC再生混凝土装饰挂板的研制[J].混凝土与水泥制品,2021(4):99-102. XIAO J Z,HOU Y Q,ZHANG B G,et al.Development of GRC Recycled Concrete Decorative Panels[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):99-102.

摘   要：研究了不同裂缝尺度下无机轻骨料砂浆外墙外保温系统的温度场变化情况，对含预制裂缝宽度为0.05 mm、0.10 mm、0.20 mm、0.30 mm、0.40 mm和0.50 mm的试件进行了160次热雨循环试验，测量了不同裂缝尺度下试件的温度值，分析了各阶段的温度场变化规律。结果表明：与无裂缝情况下相比，试件预制裂缝对基墙温度的变化有一定影响；系统的热物理性能随热雨循环次数的增加而逐渐劣化，裂缝宽度对保温层温度的变化影响很小，仅会对基墙的温度造成一定影响；当裂缝较宽时，基墙将在升温阶段达到较高的温度。 Abstract: The temperature change in the external thermal insulation composite systems of inorganic lightweight aggregate mortar (ETICS-ILAM) containing different crack scales was studied. 160 times of hot rain cycles were carried out on ETICS-ILAM specimens with prefabricated crack widths of 0.05 mm, 0.10 mm, 0.20 mm, 0.30 mm, 0.40 mm and 0.50 mm. The temperature values of the specimens with different crack sizes were measured, and the variation law of the temperature field in each stage was analyzed. The results show that the prefabricated cracks in the specimens have a certain influence on the temperature change in the base-wall. The thermal physical properties of the system gradually deteriorate with the increase of the number of heat-rain cycles. The crack width has little influence on the temperature change in the insulation layer, but has noticeable influence on the temperature in the base-wall. When the crack has a relatively bigger width, the temperature in the base-wall can reach a relatively higher value during the temperature increasing stage. 

田静静,袁克龙,熊厚仁,等.不同裂缝尺度下无机轻骨料砂浆外墙外保温系统温度场分析[J].混凝土与水泥制品,2021(4):69-73. TIAN J J,YUAN K L,XIONG H R,et al.Analysis on Temperature Field of External Thermal Insulation Composite Systems of Inorganic Lightweight Aggregate Mortar with Different Crack Scales[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):69-73.

摘   要：为了获得合适的陶粒泡沫混凝土墙板生产工艺参数，进行了自密实陶粒泡沫混凝土墙板工厂生产试验。结果表明：混凝土的坍落扩展度是生产中的关键参数，当其达到SF1级自密实混凝土性能要求时，所生产墙板的完整性好，但是表面缺陷较多；而达到SF2级自密实混凝土性能要求时，所生产墙板的质量好，表面缺陷少；混凝土的工作性越好，累计破泡率越小。 Abstract: In order to obtain appropriate production technology parameters of ceramist foam concrete wall panels, the factory production tests of self-compacting ceramsite foam concrete wall panels in production were carried out. The results show that the slump flow of concrete is the key parameter in production, and when it meets the requirement of class SF1 self-compacting concrete, the integrity of wall panels is good, but there are many surface defects. When it meets the requirement of class SF2 self-compacting concrete, the quality of wall panels is good and the surface defects are less. The better the workability of concrete, the smaller the cumulative bubble breaking rate.

张珍杰,王东明,王可,等.自密实陶粒泡沫混凝土墙板生产试验研究[J].混凝土与水泥制品,2021(4):74-77. ZHANG Z J,WANG D M,WANG K,et al.Research on Production Test of Self-compacting Ceramist Foam Concrete Wall Panels[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):74-77.