1.东南大学 材料科学与工程学院，江苏 南京 211189;2.东南大学 江苏省土木工程材料重点实验室，江苏 南京 211189;3.江苏苏博特新材料股份有限公司，江苏 南京 211103
张 琪（1997—），女，辽宁大连人，东南大学博士生.E-mail：230228625@seu.edu.cn
冯 攀（1988—），女，重庆人，东南大学教授，博士生导师，博士.E-mail：pan.feng@seu.edu.cn
TU526
国家自然科学基金资助项目（52122802，52078126）；江苏省科技计划专项基金（前沿技术基础研究）重大项目（BK20222004）；江苏省科学技术厅创新支撑计划（BZ2022036）
1.School of Materials Science and Engineering， Southeast University， Nanjing 211189， China;2.Jiangsu Key Laboratory of Construction Materials， Southeast University， Nanjing 211189， China;3.Sobute New Materials Co.， Ltd.， Nanjing 211103， China
通过X射线衍射仪、傅里叶变换红外光谱仪和热重分析仪表征了钢渣、硅酸三钙（C3S）和电石渣3种富钙材料的固碳能力；分析了其碳化体系的pH值变化；通过扫描电子显微镜和纳米压痕仪测试了3种材料碳化前后的微观形貌和力学性能.结果表明：富钙材料的固碳能力与其化学组成，尤其是其可溶解钙有直接的关系，可溶解钙含量最高的电石渣具有最高的固碳能力；而碳化后的力学性能则取决于碳化产物的微观力学性能以及原材料与碳化产物的堆积形态，微观形貌粗糙的钢渣和C3S更易与碳化产物紧密堆积，碳化后微观力学性能增强；但碳化产物难以填充在片状的电石渣空隙中，碳化后电石渣的微观力学性能减弱.
The carbon sequestration capacity of three calcium-rich materials， namely steel slag， tricalcium silicate（C3S） and carbide slag， was characterized by X-ray diffractometer， Fourier transform infrared spectrometer and thermal gravimetric analyzer. The pH value of carbonation system was measured. The micro-morphology and mechanical properties of before and after carbonation were measured by scanning electron microscope SEM and nano-indentation. The results show that the carbon sequestration ability is directly related to the chemical composition of the materials， especially the soluble calcium content. The carbide slag with the highest soluble calcium content has the highest carbon sequestration ability. The mechanical properties after carbonation depend on the micro-mechanical properties of carbonation products and the accumulation form of raw materials and carbonation products. Steel slag and C3S with rough micro-structure are more likely to be closely packed with carbonation products， and the micro-mechanical properties are enhanced after carbonation. However， the carbonation products are difficult to fill in the void of flake carbide slag particles， hence the micro-mechanical properties of carbide slag are weakened after carbonation.
张琪,冯攀,沈叙言,洪锦祥.多种富钙材料的碳化性能及其关键影响因素[J].建筑材料学报,2025,28(2):153-159
复制
