复掺废陶瓷粉和大理石粉对水泥基材料耐硫酸盐性的影响  

Effect of compound waste ceramic powder and marble powder on sulfate resistance of cement-based materials

作　　者：胡春华 朱玉林 李鹏飞 赵青 HU Chun-hua;ZHU Yu-lin;LI Peng-fei;ZHAO Qing(School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,湖北武汉430068

出　　处：《应用化工》2023年第6期1665-1668,1674,共5页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51178167)。

摘　　要：为探究废陶瓷粉(WCP)和大理石粉(MP)复合作用下水泥强度和干湿循环下耐硫酸盐的性能,测试净浆试样强度以及浸泡在5%(以质量计)NaSO4溶液中的表观样貌、质量变化率,并通过XRD分析其微观作用机理。结果表明,复掺WCP和MP对强度提升显著。固定MP掺量为5%,随着WCP掺量的增加,试样强度有所提高;固定MP的掺量为10%,复合取代20%水泥,强度略高于基准组A;在此基础上把WCP的掺量增加到15%,强度和A相当。在侵蚀过程中,WCP在抗硫酸盐性能方面有一定的负面影响,会加速试样劣化,但掺加MP能够改善试样的劣化现象;XRD的测试结果显示MP的掺加会减少钙矾石的产生,从而延缓裂缝的形成和发展。WCP和MP以适宜的比例复合取代水泥,对强度提升的同时,也会一定程度上提升抗侵蚀性能。To investigate the strength of cement under the compound action of waste ceramic powder(WCP)and marble powder(MP)and the resistance to sulfate under dry and wet cycles,the strength of the net slurry specimens and their apparent appearance and mass change rate when immersed in 5%(by mass)NaSO 4 solution were tested,and the microscopic mechanism of action was analyzed by XRD.The results show that the compounding of WCP and MP improves the strength significantly.Fixed MP dosing of 5%,with the increase of WCP dosing,the strength of the specimens increased;fixed MP dosing of 10%,composite replacement of 20% cement,the strength is slightly higher than the benchmark group A;on this basis to increase the amount of WCP dosing to 15%,the strength is equivalent to A.During the erosion process,WCP has a certain negative effect on the sulfate resistance,which will accelerate the deterioration of the specimens,but the addition of MP can improve the deterioration of specimens.The XRD test results show that MP incorporation reduces the production of ettringite,thus retarding the formation and development of cracks.WCP and MP are compounded to replace cement in an appropriate ratio,which not only improves the strength,but also improves the corrosion resistance to a certain extent.

关 键 词：固体废弃物 废陶瓷粉 大理石粉 干湿循环 硫酸盐侵蚀 

分 类 号：TQ127[化学工程—无机化工] TU52[建筑科学—建筑技术科学]