摘要
Abstract
Abstact:The hydration of f-CaO from steel slag can lead to volume expansion of the geopolymers.This study investigates the deformation be-havior of geopolymers induced by the hydration of f-CaO in steel slag and its mechanisms by adding granulated blast-furnace slag to adjust the steel slag dosage.The results indicate that as the steel slag dosage decreases,the early deformation behavior of geopolymers is significantly mit-igated,and no expansion occurs when the steel slag dosage is reduced to 70％.The deformation behavior of geopolymers primarily occurs dur-ing the early stages of the hydration reaction(within 1 day),and stabilizes after 14 days.A reduction in steel slag dosage promotes the forma-tion of a dense three-dimensional network structure in geopolymers,effectively reducing porosity and crack formation.With decreasing steel slag dosage,the amount of Ca(OH)2 in the hydration products decreases,while the amounts of C-A-S-H,N-A-S-H,and C-S-H gels in-crease.In an alkaline environment,the Si-O and Al-O bonds in geopolymers undergo depolymerization and recombination,and the[SiO4]4-tetrahedra in the resulting gel primarily exist in the form of Q2.By adjusting the steel slag dosage,the deformation behavior of geopolymer can be effectively controlled,providing theoretical and technical support for optimizing the performance of geopolymers.关键词
钢渣/矿渣/地聚物/变形行为/影响机理Key words
Steel slag/Granulated blast-furnace slag/Geopolymer/Deformation behavior/Influence mechanism分类
建筑与水利
