掺生物炭对碳化养护水泥基材料力学性能和固碳率的影响
PDF下载 (178)陈 鑫,贺智敏,黄伯韬,陈信策.掺生物炭对碳化养护水泥基材料力学性能和固碳率的影响[J].宁波大学学报(理工版),2025,38(4):19-27.DOI:10.20098/j.cnki.1001-5132.2024.0804
CHEN Xin,HE Zhimin,HUANG Botao,CHEN Xince.Impact of biochar addition on the mechanical properties and carbon sequestration rate of carbon-curing cementitious materials[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(4):19-27.DOI:10.20098/j.cnki.1001-5132.2024.0804
| Title: | Impact of biochar addition on the mechanical properties and carbon sequestration rate of carbon-curing cementitious materials |
| 作者: | 陈 鑫, 贺智敏, 黄伯韬, 陈信策 |
| Author(s): | CHEN Xin, HE Zhimin, HUANG Botao, CHEN Xince |
| 关键词: | 生物炭; 碳化养护; 强度; 固碳率 |
| Keywords: | biochar; CO2 curing; strength; carbon sequestration rate |
| 分类号: | TU528.57 |
| DOI: | 10.20098/j.cnki.1001-5132.2024.0804 |
| 文献标识码: | A |
| 摘要: | 为了促进水泥基材料的性能，提升固碳率，以掺生物炭的水泥基材料为研究对象，分析了掺生物炭试件的抗压强度和碳化程度的影响因素，结合热分析和电镜观察等方法对水化产物进行了定量分析，并探究其微观机理。研究结果表明：（1）与空白组试件相比，掺生物炭试件在水胶比为0.50、生物炭粒径为200目、碳化养护时长为48h、生物炭掺量质量分数为3%时碳化养护的强度提升效果显著，掺生物炭试件在3d和28d时抗压强度分别提升了21.6%和23.0%；（2）在碳化养护时长为4~48h范围内，掺生物炭胶砂试件的固碳率随着碳化时长的增加提升明显，碳化面积从16.52%增加到51.98%，预饱和CO2处理生物炭能够增加0.71%的固碳率。 |
| Abstract: | In order to improve carbon sequestration rate and properties of the cementitious materials, this study investigated the effect of incorporating biochar as a supplementary cementitious material, for which the compressive strength and carbonation degree of the test specimens were evaluated. TGA and SEM tests were conducted to analyze the hydration products. The results showed that: (1) Significant compressive strength improvement effect of carbon-curing cementitious materials was found by using 3% biochar of 200 mesh size at a 0.5 w/c ratio and a 48h CO2 curing process, and the 3d and 28d compressive strength was improved by 21.6% and 23.0% respectively. (2) During 4-48h of CO2 curing, the CO2 sequestration rate of biochar incorporated mortar specimens increased with CO2 curing time, and the carbonated area expanded from 16.52% to 51.98%. Pre-saturated CO2 treatment for biochar enhanced the carbon sequestration rate by 0.71%. |
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| 备注/Memo: | 收稿日期：2024−08−10 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：国家自然科学基金（42477152）；企、事业单位委托项目（HX2023000737） 第一作者：陈 鑫，硕士研究生，主要研究方向为混凝土材料。E-mail: 1961223568@qq.com *通信作者：贺智敏，副教授，主要研究方向为混凝土材料。E-mail: hezhimin@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
