哈尔滨工程大学学报2025，Vol.46Issue(4)：696-702,7.DOI:10.11990/jheu.202303005
全地聚物再生粗骨料混凝土力学性能及界面形貌
Mechanical properties and interface morphology of fully geopolymer-made recycled coarse aggregate concrete
摘要
Abstract
Aiming to efficiently address the accumulation of construction waste and promote the development of low-carbon cementitious materials,this study investigates the properties of geopolymer-made recycled coarse aggregate(GRCA)and its application in fully geopolymer-made recycled concrete(FGRC).Fly ash and other solid wastes were utilized to prepare natural geopolymer concrete as the matrix,which was then crushed to produce GRCA.These aggregates were then used to replace natural coarse aggregates at varying replacement rates for FGRC fabrica-tion.The results demonstrate that the mechanical properties of FGRC generally surpass those of traditional cement-based recycled concrete,maintaining high strength even at higher replacement rates.Microscopic analyses via scanning electron microscopy revealed that a"secondary geopolymerization"occurs between GRCA and the fresh geopolymer matrix.This unique mechanism densifies the interfacial transition zone(ITZ)in FGRC,transforming the weak ITZ observed in traditional cement-based recycled concrete into a more compact structure,thereby sub-stantially enhancing the mechanical performance of FGRC.关键词
地聚物/再生粗骨料/再生混凝土/全地聚物再生混凝土/二次再地聚反应/力学性能/界面过渡区/微观形貌Key words
geopolymer/recycled coarse aggregate/recycled concrete/fully geopolymer-made recycled concrete/secondary geopolymerization/mechanical properties/interface transition zone/microscopic morphology分类
土木建筑引用本文复制引用
陈波,王悦,华敏琦..全地聚物再生粗骨料混凝土力学性能及界面形貌[J].哈尔滨工程大学学报,2025,46(4):696-702,7.基金项目
国家自然科学基金项目(51978549,52278528). （51978549,52278528）
