生物质灰用作混凝土掺合料的研究综述
Research Review of Biomass Ash as Concrete Admixture
马必聪 1梁健 1翁贻令1
作者信息
- 1. 广西路桥工程集团有限公司,广西 南宁 530200
- 折叠
摘要
为总结生物质灰用作混凝土掺合料的研究进展,该文从生物质灰的理化特性、作用机理、生产工艺的影响因素及掺入混凝土后对混凝土工作性能、力学性能和耐久性能的影响进行研究.结果表明:与传统矿物掺合料相比,生物质灰密度小且比表面积大,大部分生物质灰中的SAF(SiO2+Al2O3+Fe2O3)活性成分总量均超过F类火山灰的标准要求(即≥70%).将生物质灰掺入混凝土后,能有效提高混凝土的力学和耐久性能,但可能会对混凝土的流动性和抗碳化性能产生负面影响.另外,生物质灰的性能受燃烧和研磨等生产工艺的影响较大,为实现生物质灰在大规模工程中的广泛应用,未来还需要对生物质灰的生产工艺进行优化.
Abstract
In order to provide a comprehensive overview of research progress in the use of biomass ash as concrete admixture,the physical and chemical properties,mechanism of action,factors affecting the production process of biomass ash,and the effects of biomass ash incorporation on the working properties,mechanical properties,and durability of concrete were studied.The results show that biomass ash has a smaller density and a larger specific surface area than traditional mineral admixture,and the total amount of active components,namely SiO2+Al2O3+Fe2O3(SAF)in most biomass ashes exceeds the requirements of class F volcanic ash(≥70% ).Incorporating biomass ash can effectively improve the mechanical properties and durability of concrete,but it may have a negative impact on the flowability and anti-carbonization performance of concrete.Moreover,the performance of biomass ash is greatly influenced by production processes such as combustion and grinding.To make biomass ash widely used in large-scale engineering in the future,it is necessary to optimize the production process of biomass ash.
关键词
生物质灰/混凝土/掺合料/理化性质Key words
biomass ash/concrete/admixture/physical and chemical properties引用本文复制引用
基金项目
中央引导地方科技发展资金项目(20221229)
广西重点研发计划项目(桂科AB23026126)
交通运输行业重点科技项目(2121MSI026)
出版年
2024
国家科技期刊平台
NSTL
万方数据