摘要
锰渣与再生砖骨料均属于大宗固废,提升大宗固废利用率具有重要的环境效益和经济效益。本文利用锰渣、再生砖骨料等制备了免烧砖,探究了锰渣掺量对免烧砖各项性能的影响,且对其微观结构及有害物质浸出行为进行了分析。结果表明:制备的免烧砖外观质量优良,色泽均一,尺寸标准;结合强度要求和抗冻性要求,锰渣掺量不超过10%(质量分数)时,可制备出强度、耐水性和耐久性优异的MU20免烧砖,锰渣掺量不超过15%时,可制备出性能优异的MU15免烧砖;掺适量锰渣的免烧砖中形成了较多的钙矾石相,有利于强度发展。锰渣和再生砖骨料制备的免烧砖可以应用于人行道等市政工程,应用效果良好。研究结果可为锰渣低碳资源化利用以及生态砖制品的生产和应用提供技术支持。
Manganese slag and recycled brick aggregates both belong to bulk solid waste. Improving the utilization rate of bulk solid waste has important environmental and economic benefits. In this paper, non-fired bricks were prepared using manganese slag and recycled brick aggregates, the effect of manganese slag content on various properties of non-fired bricks were investigated, and the microstructure and harmful substance leaching behavior were analyzed. The results show that the non-fired bricks have good appearance quality, uniform color and standard size. Combining strength requirements and frost resistance requirements, MU20 non-fired bricks with excellent strength, water resistance and durability are prepared when manganese slag content is less than 10%(mass fraction). MU15 non-fired bricks with excellent properties are prepared when manganese slag content is less than 15%. More ettringite hydrate phase is formed in the non-fired bricks, which is beneficial to strength development. The non-fired bricks made from manganese slag and recycled brick aggregates have good application effect in sidewalks and other municipal projects. The research results provide technical support for the low carbon resource utilization of manganese slag and production and application of ecological brick products.
作者
白敏
龙广成
谢友均
王凡
石莹莹
周天阳
BAI Min;LONG Guangcheng;XIE Youjun;WANG Fan;SHI Yingying;ZHOU Tianyang(School of Civil Engineering,Central South University,Changsha 410075,China;Xiangtan Construction Engineering Group Co.,Ltd.,Xiangtan 411100,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第10期3533-3541,3555,共10页
Bulletin of the Chinese Ceramic Society
基金
湖南省重点领域研发计划(2020WK2005)。
关键词
锰渣
再生砖骨料
免烧砖
强度
耐水性
耐久性
工程应用
manganese slag
recycled brick aggregate
non-fired brick
strength
water resistance
durability
engineering application
作者简介
白敏(1996-),男,硕士研究生。主要从事固废资源化利用的研究。E-mail:minbai2021@163.com;通信作者:龙广成,博士,教授。E-mail:longguangcheng@csu.edu.cn。
