摘要
区别于普通高炉矿渣,高钛矿渣中TiO_(2)含量较高、矿物组成差异大、利用率低。高钛矿渣大量堆存会造成资源浪费,且给生态环境带来严重负担,因此亟需实现其固废资源化利用。近年来,基于高钛矿渣的矿物成分和结构稳定、微火山灰活性、多孔、集料性能优良等特点,研究人员逐渐将其作为矿物掺合料、粗细骨料等应用于水泥混凝土中,实现高钛矿渣的高效利用以及提高其使用附加值,促进高钛矿渣在混凝土中的工程应用。本文系统梳理了高钛矿渣在水泥混凝土中的研究应用进展,对高钛矿渣的来源、物理化学性质、在混凝土中的利用方式,介绍了其对混凝土工作性能、力学性能、耐久性能等方面影响的研究进展,此外深入论述了高钛矿渣作为矿物掺合料以及再生骨料对混凝土性能的影响及作用机理。最后,针对现阶段研究中的不足提出相应建议,旨在为高钛矿渣在水泥混凝土中的研究和工程应用提供参考。
Differing from ordinary blast furnace slag,high titanium slag has a higher TiO_(2)content,large difference in mineral composition and a low utilization rate.High titanium slag has caused waste of resources and serious burden on the ecological environment because of its large stock and low utilization rate,so it is urgent to realize the utilization of solid waste resources.In recent years,based on the characteristics of high titanium slag such as stability of mineral composition and structure,micro-pozzolanic activity,porous and excellent aggregate performance,some researchers have gradually applied it as admixture,coarse and fine aggregates in cement concrete to realize the efficient utilization of high titanium slag and improve the added value of its use,and to promote the engineering application of high titanium slag in concrete.In this paper,the research and application progress of high titanium slag in cement concrete is systematically reviewed.The source,physical and chemical properties of high titanium slag,its utilization in concrete and its research progress on working performance,mechanical properties and durability of concrete are introduced.In addition,the influence and mechanism of high titanium slag as mineral admixture and recycled aggregate on concrete performance are discussed in depth.Finally,the corresponding suggestions are proposed according to the shortcomings in the current research,to provide reference for the research direction and engineering application of high titanium slag in cement concrete.
作者
杨尊
李碧雄
张治博
李梁慧
YANG Zun;LI Bixiong;ZHANG Zhibo;LI Lianghui(College of Architecture and Environment,Sichuan University,Chengdu 610065,China;Key Laboratory of Deep Earth Science and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第18期93-101,共9页
Materials Reports
基金
四川省重点研发计划项目(2023YFQ0047)。
关键词
高钛矿渣
水泥混凝土
理化性质
工作性能
力学性能
耐久性能
high titanium slag
cement concrete
physicochemical property
workability
mechanical property
durability
