摘要
免烧轻集料或冷粘轻集料,能够大量回收利用工业废弃物,且无需烧结,具有良好的经济效益、环境效益和社会效益。本文归纳了免烧轻集料的制备技术和产品达到的性能,综述了免烧轻集料的养护方式及其在混凝土和其他领域中的应用。免烧轻集料产品具有密度偏高、吸水率偏大、比强偏低等问题,本文归纳了降低密度的措施和壳层强化技术,如引气、使用轻质材料和采用核壳结构,提出核壳结构是免烧轻集料轻质高比强和功能化的发展方向,并论述了实现免烧轻集料轻质高比强和功能化中亟待解决的问题。
Non-sintered lightweight aggregate(NSLA),also known as cold-bonded lightweight aggregate(CBLA),is a type of lightweight aggregate that does not require sintering and utilizes a large amount of industrial waste,while providing economic,environmental,and social benefits.Current NSLA preparation technologies and product qualities employing a variety of industrial wastes were summarized,as well as curing methods and applications in concrete and other industries.The strategies to reduce density and shell strengthening technologies were highlighted,such as air-introduce,using light raw materials,and employing core-shell construction,with a focus on the challenges of high density,high water absorption,and low specific strength.Furthermore,it is suggseted that the core-shell structure is the development direction for lightweight,high specific strength,and functionalization of NSLA,as well as the pressing issues that must be addressed to achieve lightweight,high-strength,and functionalization of NSLA.
作者
庞超明
周杨帆
郦培娟
张春鹏
PANG Chaoming;ZHOU Yangfan;LI Peijuan;ZHANG Chunpeng(Jiangsu Key Laboratory of Construction Materials,School of Materials Science and Engineering,Southeast University,Nanjing 211189,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第6期1849-1860,共12页
Bulletin of the Chinese Ceramic Society
基金
国家重点研发计划(2021YFB3802000,2021YFB3802004)
江苏省住建厅节能减排专项(2016-2)。
关键词
免烧轻集料
工业废弃物
低密度
养护技术
功能化
核壳结构
non-sintered lightweight aggregate
industrial waste
low density
curing technology
functionalization
core-shell structure
