摘   要：固定废玻璃粉和矿渣的总掺量为30%，研究了废玻璃粉和矿渣的复掺比例对混凝土力学及抗硫酸盐侵蚀性能的影响，其中，废玻璃粉掺量分别为0、5%、10%、15%、20%、25%、30%。结果表明：随着废玻璃粉掺量的增加，试件的抗压强度先增大后减小，总孔隙率先减小后增大，最佳废玻璃粉掺量为10%；随着干湿循环次数的增加或侵蚀溶液浓度的增大，试件表面出现了不同程度的粉化、起砂等现象，质量变化率和抗压强度耐蚀系数均呈先增大后减小的趋势，且随着废玻璃粉掺量的增加，质量变化率的峰值先减小后增大，抗压强度耐蚀系数的峰值先增大后减小；适量废玻璃粉与矿渣在混凝土中有效发挥了颗粒效应、水化效应、交互活性效应等，从而在一定程度上改善了混凝土的力学及抗硫酸盐侵蚀性能。 Abstract: The total content of waste glass powder and slag was fixed at 30%, and the effects of the composite ratio of waste glass powder and slag on the mechanical properties and sulfate attack resistance of concrete were studied. Among which, the content of waste glass powder was 0, 5%, 10%, 15%, 20%, 25%, and 30%, respectively. The results show that as the content of waste glass powder increases, the compressive strength first increases and then decreases, and the total porosity of the specimen first decreases and then increases, and the optimal content of waste glass powder is 10%. As the number of dry-wet cycle increases or the concentration of the corrosive solution increases, different degrees of pulverization and sanding appear on the surface of the specimen, and the rate of mass change and the corrosion resistance coefficient of compressive strength both show a trend of first increasing and then decreasing. Moreover, with the increase of waste glass powder content, the peak value of the rate of mass change first decreases and then increases, and the peak value of the corrosion resistance coefficient of compressive strength first increases and then decreases. The appropriate content of waste glass powder and slag effectively exert particle effect, hydration effect, interactive activity effect, etc. in concrete, thereby improving the mechanical properties and sulfate attack resistance of concrete to a certain extent.

乔丽娜,李小娟,张秀礼,等.废玻璃粉和矿渣对混凝土力学及抗硫酸盐侵蚀性能的影响[J].混凝土与水泥制品,2024(9):86-91. QIAO L N,LI X J,ZHANG X L,et al.Effect of waste glass powder and slag on mechanical properties and sulfate attack resistance of concrete[J].China Concrete and Cement Products,2024(9):86-91.

摘   要：基于某地铁盾构施工产生的盾构泥浆再利用问题，采用盾构泥浆全替代砂，同时掺入减水剂、早强剂、微硅粉、纤维等材料设计并制备了同步注浆材料，采用正交试验法研究了减水剂掺量（1.0%~2.5%）、早强剂掺量（3%~6%）、微硅粉掺量（10%~25%）对同步注浆材料稠度和抗压强度的影响。结果表明：经优化调整得到的同步注浆材料的最佳配合比为盾构泥浆2 000 g、水泥500 g、聚丙烯纤维1 g、减水剂5 g、早强剂25 g、微硅粉125 g、水987.2 g，此时，同步注浆材料的稠度、抗压强度等指标均满足工程要求。 Abstract: Based on the issue of reusing shield tunneling mud generated during shield tunneling construction in a certain subway, the synchronous grouting material was designed and prepared by replacing all sand with shield tunneling mud and adding water reducing agent, early strength agent, micro silica powder, fibers and other materials, and the orthogonal experimental method was used to study the effects of water reducing agent content(1.0%~2.5%), early strength agent content(3%~6%), and micro silicon powder content(10%~25%) on the consistency and compressive strength of synchronous grouting materials. The results show that the optimal mix proportion of synchronous grouting material obtained through optimization and adjustment is 2 000 g of shield tunneling mud, 500 g of cement, 1 g of polypropylene fiber, 5 g of water reducing agent, 25 g of early strength agent, 125 g of micro silica powder, and 987.2 g of water. Besides, the consistency and compressive strength of the synchronous grouting materials meet the engineering requirements.

韩冰.地铁盾构泥浆制备同步注浆材料的性能研究[J].混凝土与水泥制品,2024(9):92-95. HAN B.Study on performance of synchronous grouting materials prepared by subway shield tunneling mud[J].China Concrete and Cement Products,2024(9):92-95.

摘   要：建立了一种采用离子色谱法分析海砂中阴离子的检测方法，验证了该方法的准确度，在此基础上，采用L9（33）正交试验研究了砂水比、洗涤时间、洗涤次数对海砂中Cl-去除率的影响，并进行了成本效益分析。结果表明：采用离子色谱法可快速分离和检测出海砂中的F-、Cl-、Br-、NO3-、SO42-、I-，且准确度较高，相关系数R2均大于0.997 0；当砂水比为1∶20、洗涤时间为10 min、洗涤次数为3次时，对海砂的淡化效果最好，Cl-去除率可达99.8%；采用中水淡化海砂具有显著的环境效益。 Abstract: A detection method for anions in sea sand by using ion chromatography was established, and the accuracy of the method was verified. Based on this, the L9(33) orthogonal test was used to study the effects of sand-water ratio, washing time, and washing frequency on the Cl- removal rate in sea sand, and a cost-benefit analysis was conducted. The results show that using ion chromatography can quickly separate and detect F-, Cl-, Br-, NO3-, SO42-, I-, and the accuracy is high, with correlation coefficients R2 all greater than 0.997 0. When the sand-water ratio is 1∶20, the washing time is 10 minutes, and the washing frequency is 3 times, the desalination effect on sea sand is the best, and the Cl- removal rate can reach 99.8%. The reuse of reclaimed water for desalination of sea sand has significant environmental benefits.

高攀峰,刘帅豪,张健奕,等.基于离子色谱法的中水淡化海砂工艺研究[J].混凝土与水泥制品,2024(9):96-99,105. GAO P F,LIU S H,ZHANG J Y,et al.Study on process of desalination of sea sand using reclaimed water based on ion chromatography[J].China Concrete and Cement Products,2024(9):96-99,105.

摘   要：以偏高岭土为前驱体，在常温固化条件下制备了高韧性地聚合物复合材料（HTGC），研究了不同粒径偏高岭土的复掺比例、激发剂的浓度和模数、养护龄期对HTGC抗压、抗拉和抗弯性能的影响。结果表明：复掺适量不同粒径的偏高岭土有利于提高HTGC的抗压和抗拉性能；随着激发剂浓度从6 mol/L增至14 mol/L，试件的抗拉和抗压强度增大，拉伸和抗弯延性有所降低；随着激发剂模数从1.2增至2.0，试件抗压和抗拉强度基本有所降低；偏高岭土基HTGC具有明显的早强特性，这使其在快速建造项目中具有较大的应用潜力。 Abstract: High tenacity geopolymer composite(HTGC) were prepared by using metakaolin as a precursor under room temperature curing conditions. The effects of mixing ratios of different particle size metakaolin, concentration and modulus of activator, and curing age on the compressive, tensile, and bending properties of HTGC were studied. The results show that adding an appropriate content of metakaolin with different particle sizes is beneficial for improving the compressive and tensile properties of HTGC. As the concentration of activator increases from 6 mol/L to 14 mol/L, the tensile strength and compressive strength of the specimens increase, while the tensile ductility and bending ductility decrease. As the modulus of the activator increases from 1.2 to 2.0, the compressive strength and tensile strength of the specimens generally decrease. Metakaolin based HTGC has obvious early strength characteristics, which makes it have great potential for application in rapid construction projects.

李天歌,王圣怡,占羿箭.常温固化下偏高岭土基高韧性地聚合物复合材料的性能研究[J].混凝土与水泥制品,2024(9):100-105. LI T G,WANG S Y,ZHAN Y J.Study on properties of metakaolin based high tenacity geopolymer composite under room temperature curing[J].China Concrete and Cement Products,2024(9):100-105.

摘   要：对比研究了不同掺量（0、1%、3%、5%、7%）的斜发沸石和菱沸石对中、低水平放射性废液水泥固化体的流动度、抗压强度、抗浸泡性和抗浸出性的影响。结果表明：适量的斜发沸石或菱沸石均能有效提高水泥固化体的流动度、抗压强度和抗浸泡性；随着沸石掺量的增加，沸石对水泥固化体中90Sr、137Cs的吸附效果随之增强；斜发沸石对90Sr的吸附效果优于菱沸石，而对137Cs的吸附效果弱于菱沸石。 Abstract: The effects of different contents(0, 1%, 3%, 5%, 7%) of clinoptilolite and chabazite on the flowability, compressive strength, immersion resistance, and leaching resistance of cement solidification material of low and medium level radioactive waste liquid were compared and studied. The results show that appropriate content of clinoptilolite or chabazite can effectively improve the flowability, compressive strength, and immersion resistance of cement solidification material. With the increase of the content of zeolite, the adsorption effect of zeolite on 90Sr and 137Cs in cement solidification material is enhanced. The adsorption effect of clinoptilolite on 90Sr is better than that of chabazite, while its adsorption effect on 137Cs is weaker than that of chabazite.

slag cement[J].Journal of Nuclear Materials,2017,483:121-131. [12] LAFOND E,COUMES C C D,GAUFFINET S,et al.Investigation of the swelling behavior of cationic exchange resins saturated with Na+ ions in a C3S paste[J].Cement and Concrete Research,2015,69:61-71. [13] BARRER R M,BARTHOLOMEW R F,REES L V C.Ion exchange in porous crystals part Ⅰ. Self-and exchange-diffusion of ions in chabazites[J].Journal of Physics and Chemistry of Solids,1963,24(1):51-62. [14] BARRER R M,DAVIES J A,REES L V C.Thermodynamics and thermochemistry of cation exchange in chabazite[J].Journal of Inorganic and Nuclear Chemistry,1969,31(1):219-232. [15] BARRER R M,KLINOWSKI J.Influence of framework charge density on ion-exchange properties of zeolites[J].Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases,1972,68:1956-1963. [16] KURONEN M,HARJULA R,JERNSTR?魻M J,et al.Effect of the framework charge density on zeolite ion exchange selectivities[J].Physical Chemistry Chemical Physics,2000,2:2655-2659.

摘   要：用水玻璃对铸造废砂进行了改性处理，研究了改性铸造废砂的掺量（0、10%、30%、50%、70%）对混凝土力学性能和耐磨性能的影响。结果表明：随着改性铸造废砂掺量的增加，试件的28 d抗压强度先增大后减小，最佳掺量为10%；随着改性铸造废砂掺量的增加，试件的28 d弹性模量和磨耗量降低，说明弹性变形能力变大，耐磨性能提高。 Abstract: Water glass was used to modify casting waste sand, and the effects of the content(0, 10%, 30%, 50%, 70%) of modified casting waste sand on the mechanical properties and wear resistance of concrete were studied. The results show that with the increase of the content of modified casting waste sand, the 28 d compressive strength of the specimen first increases and then decreases, and the optimal content is 10%. With the increase of the content of modified casting waste sand, the 28 d elastic modulus and abrasion loss of the specimen decrease, indicating an increase in elastic deformation capacity and an improvement in wear resistance.

芋艳梅,李江华.改性铸造废砂对混凝土力学及耐磨性能的影响[J].混凝土与水泥制品,2024(9):110-113. YU Y M,LI J H.Effect of modified casting waste sand on mechanical properties and wear resistance of concrete[J].China Concrete and Cement Products,2024(9):110-113.