碳化再生微粉对碱激发矿渣材料的影响  

Effect of Carbonated Recycled Concrete Powder on Alkali-Activated Slag Materials

作　　者：李琪 王亮[1] 王浩[2] 王成龙 徐建 胡伟 LI Qi;WANG Liang;WANG Hao;WANG Chenglong;XU Jian;HU Wei(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Stake Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,淮南232001 [2]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,淮南232001

出　　处：《硅酸盐通报》2025年第1期289-296,共8页Bulletin of the Chinese Ceramic Society

基　　金：安徽理工大学引进人才科研启动基金(2023yjrc78);国家自然科学基金青年基金项目(52108187);安徽省高等学校科学研究项目(2023AH040156)。

摘　　要：为促进再生微粉(RCP)在碱矿渣(AAS)材料中的应用,本文利用碳化技术对RCP进行提质处理并用RCP替代10%~40%(质量分数,下同)粒状高炉矿渣(GBFS)制备AAS砂浆,探究碳化再生微粉(CRCP)掺量对AAS砂浆水化性能、力学强度及微结构的影响。结果表明:CRCP的主要成分为细尺寸碳酸钙和硅胶,具有较高的吸水率,能降低AAS砂浆的流动度;CRCP可通过填充效应和活性效应促进GBFS水化,改善AAS砂浆的堆积密度和孔结构,从而增强抗压强度;当CRCP掺量为20%时,AAS砂浆的抗压强度具有最优值,高出未处理RCP约16%~20%。In order to promote the application of recycled concrete powder(RCP)in alkali-activated slag(AAS)materials,this paper uses carbonization technology to improve the quality of RCP and replaces 10%~40%(mass fraction,the same below)granulated blast furnace slag(GBFS)with RCP to prepare AAS mortar.The effect of the dosage of carbonated recycled concrete powder(CRCP)on the hydration performance,mechanical strength,and microstructure of AAS mortar was investigated.The results show that main components of CRCP are fine-sized calcium carbonate and silica gel,which have high water absorption and can reduce the fluidity of AAS mortar.CRCP can promote hydration of GBFS by filling and activity effects,improving the packing density and pore structure of AAS mortar,thereby increasing compressive strength.It is observed that when CRCP content reaches 20%,the resulting AAS mortar exhibits an optimal compressive strength approximately 16%~20% higher than that achieved with non-carbonated RCP.

关 键 词：再生微粉 碳化处理 碱激发矿渣 抗压强度 孔结构 

分 类 号：TU528.09[建筑科学—建筑技术科学]