碱激发泡沫混凝土干燥收缩影响因素及其抑制方法研究进展
Research progress on influencing factors and control methods of drying shrinkage of alkali-activated foam concrete
孙浩洋 1张秀芝 1陶文宏 1闫孝伟 2侯杰 1郑沛祺 1丰曙霞 1杜鹏3
作者信息
- 1. 济南大学 材料科学与工程学院,济南 250022
- 2. 山东正珩新材料科技有限责任公司,济南 250014
- 3. 济南大学山东省建筑材料制备与测试技术重点实验室,济南 250022
- 折叠
摘要
碱激发泡沫混凝土是结合碱激发材料和泡沫混凝土性能优势发展的一种绿色低碳节能材料.与普通硅酸盐水泥水化产物和孔隙分布的差异使碱激发材料具有高收缩的缺点,限制了其应用和发展.本综述分析了毛细管张力理论、表面张力理论、分离压力理论和层间水迁移理论 4种干燥收缩机制和影响因素,对比了碱激发泡沫混凝土与水泥基材料、碱激发材料收缩机制的异同.同时,总结了碱激发泡沫混凝土抑制收缩的最新研究进展.碱激发材料相较于水泥基材料干燥收缩更大的原因是水化产物的不同,碱激发泡沫混凝土的干燥收缩最主要与泡沫量有关,浆体越少干燥收缩值越小.最后,指出了碱激发泡沫混凝土未来发展和研究方向,为其绿色低碳化发展提供一有效途径.
Abstract
Alkali-activated foam concrete is a type of green,low-carbon and energy-saving material which com-bines the advantages of alkali-activated materials and foam concrete.The application and development of alkali-activated foam concrete are limited by its complex drying shrinkage values which affected by its complicated pores structure and hydration products that unlike cement.In this review,the capillary tension theory,the surface tension theory,the separation pressure theory and the interlayer water transfer theory were analyzed.Contrast the similarities and differences of contraction mechanism between alkali-activated foam concrete,cement base material and alkali-activated material.Meanwhile,the latest research progress of inhibiting drying shrinkage of alkali-activated foam concrete is summarized.Compared with cement-based materials,alkali-activated materials have larger drying shrinkage because of the different hydration products.The drying shrinkage of alkali-activated foam concrete is mainly related to the amount of foam,and the less slurry,the smaller the drying shrinkage value.Finally,this review points out the research and application of alkali-activated foam concrete and provides an effective way for its development economically and environmentally.
关键词
碱激发泡沫混凝土/干燥收缩/孔结构/抑制方法/收缩机制Key words
alkali-activated foam concrete/drying shrinkage/pore structure/control methods/contraction mechanism引用本文复制引用
基金项目
国家自然科学基金(52178211)
济南市新高校 20 条(2021GXRC087)
出版年
2024
NETL
NSTL
万方数据