硅酸盐通报2026，Vol.45Issue(6)：1892-1902,11.DOI:10.16552/j.cnki.issn1001-1625.2025.1148
低浓度CO2条件40℃环境对水泥胶砂早期碳化与水化反应进程影响研究
Influence of Low-Concentration CO2 Environment at 40℃on Early Carbonation and Hydration Reaction Process of Cement Mortar
摘要
Abstract
In response to the low-carbon development strategy for building materials,this study explores the optimization path for early-age performance of cement-based materials under low-concentration CO2 conditions.Cement mortars were subjected to CO2 curing at 3%(volume fraction)concentration and 40℃for 2,6,and 12 h to investigate the effects of the carbonation-hydration synergy on mechanical properties,microstructure evolution.The results show that the comprehensive performance of cement-based materials is optimal after 6 h of carbonation,with a 28 d compressive strength of 58.6 MPa—approximately 15.1%higher than that of the purely hydrated sample.At this stage,the amount and crystallinity of CaCO3 reach their maximum,and the proportion of calcite increases significantly.Mercury intrusion porosimetry results reveal that 6 h carbonation effectively refines the pore structure of the specimen surface layer,reducing porosity to 21.8% and enhancing compactness and stability of the material.However,extending the carbonation time causes deterioration of the surface pore structure,leading to reduce strength due to over-carbonation.关键词
水泥基材料/低浓度CO2/早期碳化/温度调控/微观结构演化Key words
cement-based material/low-concentration CO2/early-age carbonation/temperature regulation/microstructural evolution分类
建筑与水利引用本文复制引用
胡庆浩,李绍纯,陈旭,张书畅..低浓度CO2条件40℃环境对水泥胶砂早期碳化与水化反应进程影响研究[J].硅酸盐通报,2026,45(6):1892-1902,11.基金项目
国家自然科学基金(52479125) （52479125）
丝绸之路经济带创新驱动发展试验区、乌昌石国家自主创新示范区科技发展计划(2022LQ03010) （2022LQ03010）
