| 摘要: |
| 研究了生物炭对碳化养护水泥砂浆抗压强度和固碳量的影响规律和机理.结果表明：生物炭能有效促进水泥早期水化，改善碳化养护水泥砂浆的抗压强度和孔结构，且效果随着碳化养护时间的延长而愈加明显；掺有生物炭试件的水泥石固碳量略有降低，但综合考虑生物炭封存与碳化养护捕获的总固碳量则明显提高. |
| 关键词: 水泥基材料 碳化养护 抗压强度 固碳量 改性机理 |
| DOI：10.3969/j.issn.1007-9629.2023.08.002 |
| 分类号:TQ172.1 |
| 基金项目:国家自然科学基金资助项目（52108202）；黑龙江省自然科学基金资助项目（LH2022E071） |
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| Modification Mechanism of Biochar on Carbonation-Cured Cement Mortar |
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CHEN Tiefeng1,2, GAO Xiaojian1,2
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1.School of Civil Engineering， Harbin Institute of Technology， Harbin 150090， China;2.Key Lab of Structural Dynamic Behavior and Control of the Ministry of Education， Harbin Institute of Technology， Harbin 150090， China
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| Abstract: |
| The influence and mechanism of biochar on the compressive strength and carbon sequestration of carbonation-cured cement mortar were studied. The results show that addition of biochar can effectively promote early hydration reaction of cement， as well as improve compressive strength and pore structure of carbonation-cured cement mortar. This improvement effect becomes more obvious with the prolongation of carbonation duration. Besides， incorporation of biochar decreases carbon sequestration in carbonation curing， while the total carbon sequestration by biochar and carbonation curing increases significantly by considering both biochar and cement paste. |
| Key words: cement-based material carbonation-cured compressive strength carbon sequestration modification mechanism |
