| 摘要: |
| 制备了3CaO·2SiO2(C3S2)矿物，并用加速碳化的方式使其硬化.利用X射线衍射（XRD）、热分析(TG和DTA)、傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)和能谱仪（EDS），研究了C3S2矿物的CO2吸收量、力学性能和微观结构变化.结果表明：C3S2试块在体积分数为99%的CO2中碳化24h，CO2碳化程度可以达到433%，抗压强度为748MPa；碳化产物CaCO3和非晶态SiO2为C3S2抗压强度的主要来源. |
| 关键词: C3S2 碳化 力学性能 二氧化碳吸收 |
| DOI：103969/j.issn1007 9629201806007 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(U1604118) |
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| Rapid Hardening Process of C3S2Minerals by Accelerated Carbonation |
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GUAN Xuemao, WEI Hongshan, MA Xiaoe, LIU Songhui, QIU Man
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School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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| Abstract: |
| The pure 3CaO·2SiO2(C3S2) was prepared as clinker and hardened via accelerated carbonation. The CO2 uptake, mechanical properties and microstructure changes were analyzed by XRD, thermo gravimetric analysis(TG， DTA), FTIR and SEM EDS.The results show that degree of CO2 curing of the clinker reached 433% that results in compressive strength of 748MPa after 24h carbonation in 99%(by volume) CO2concentration; the carbonation product is calcium carbonate and silica gel, which contributes to the compressive strength. |
| Key words: C3S2 carbonation mechanical property CO2 uptake |
