硅酸盐通报2025，Vol.44Issue(5)：1689-1702,14.DOI:10.16552/j.cnki.issn1001-1625.2024.1513
超高性能碱激发混凝土的性能及环境影响研究
Performance and Environmental Impact of Ultra-High Performance Alkali-Activated Concrete
摘要
Abstract
In order to reduce the carbon emission and embodied energy consumption in the production process of ultra-high performance concrete(UHPC),ultra-high performance alkali-activated concrete(UHPAAC)was prepared by replacing traditional Portland cement with alkali-activated slag materials,and the effects of sodium silicate modulus(1.1,1.3,1.5)and alkali equivalent(6％,7％,8％,mass fraction)on the workability,mechanical performance and durability performance of UHPAAC were studied,and the environmental benefits were analyzed.The results show that the pore structure of UHPAAC can be refined by appropriately increasing the sodium silicate modulus and alkali equivalent,and the properties of UHPAAC can be improved.UHPAAC has a faster coagulation hardening and lower fluidity than UHPC.UHPAAC has high early strength,and the compressive strength of standard curing 7 d exceeds 100 MPa,and reaches 80.2％～92.4％ of the compressive strength of 28 d.The capillary water absorption mass and water absorption of UHPAAC are significantly higher than those of UHPC,but the chloride ion permeation resistance is better than that of UHPC,and the carbonization depth is 0 mm after 28 d of carbonization under accelerated laboratory conditions.In addition,UHPAAC can significantly reduce carbon emission and embodied energy consumption.This study indicates that when the sodium silicate modulus is 1.5 and the alkali equivalent is 6％,the comprehensive performance of UHPAAC is optimal and its environmental impact is minimal.关键词
超高性能碱激发混凝土/工作性能/抗压强度/耐久性能/环境影响/固废利用Key words
ultra-high performance alkali-activated concrete/workability/compressive strength/durability performance/environmental impact/utilization of solid waste分类
建筑与水利引用本文复制引用
崔祎菲,刘梦华,张益聪,艾威侠,徐诺..超高性能碱激发混凝土的性能及环境影响研究[J].硅酸盐通报,2025,44(5):1689-1702,14.基金项目
国家自然科学基金(52108223,U22A20244) （52108223,U22A20244）
山东省自然科学基金(ZR2020QE249,ZR2021JQ17) （ZR2020QE249,ZR2021JQ17）
高等学校学科创新引智基地——111计划(D16006) （D16006）
青岛市科技惠民示范专项(24-1-8-cspz-9-nsh) （24-1-8-cspz-9-nsh）
