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材料导报  2023, Vol. 37 Issue (15): 21100115-5    https://doi.org/10.11896/cldb.21100115
  无机非金属及其复合材料 |
磷酸改性钢渣粉复合氢氧化钙浆体早期水化与微观结构
霍彬彬1,2, 陈春1, 张亚梅1,*
1 东南大学材料科学与工程学院,江苏省土木工程材料重点实验室,南京 211189
2 中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏 徐州 221116
Early-age Hydration and Microstructure of Phosphoric Acid Modified Steel Slag Powder Blended Portlandite Pastes
HUO Binbin1,2,CHEN Chun1, ZHANG Yamei1,*
1 Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2 State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
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摘要 为探究磷酸改性钢渣粉在碱性水泥环境中早期水化能力的变化,对比研究了未改性与磷酸改性钢渣粉复合氢氧化钙浆体的水化热、水化产物与微观结构变化。结果表明:相比未改性钢渣粉复合氢氧化钙浆体,磷酸改性钢渣粉复合氢氧化钙浆体的水化放热峰前移并且放热速率升高,72 h水化放热量提升了16.8%;其在3 d、7 d和28 d时消耗更多的氢氧化钙,产生更多水化产物,导致浆体孔隙率下降。但由于磷酸根对活性硅酸盐矿物水化的延缓作用,磷酸改性钢渣复合氢氧化钙浆体的孔隙率由3 d水化至28 d时的下降程度弱于未改性组。
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霍彬彬
陈春
张亚梅
关键词:  钢渣粉  磷酸  改性  氢氧化钙  水化  微观结构    
Abstract: Aiming to investigate the early-age hydration ability change ofphosphoric acid (PA) modified steel slag powder (SS) under alkaline cement environment, the hydration heat evolution, hydrates, and microstructure of the phosphoric acid modified SS (SSPA) and unmodified SS blended portlandite pastes were compared in this investigation. It is found that compared to SS blended portlandite pastes, the heat release peak of SSPA blended portlandite paste moves forward and accompanies with higher heat release value, resulting in an improvement of 16.8% in 72 h cumulative hydration heat. Additionally, SSPA blended portlandite paste consumes more content of portlandite at 3 d, 7 d and 28 d, produces less pore and more hydrates. While due to the retard effect of PO43- to the active calcium silicates, the decreased porosity in SSPA blended portlandite pastes from 3 d to 28 d is lower than that of the SS blended portlandite pastes.
Key words:  steel slag powder    phosphoric acid    modification    calcium hydroxide    hydration    microstructure
出版日期:  2023-08-10      发布日期:  2023-08-07
ZTFLH:  TU528  
基金资助: 国家自然科学基金(51778132;51972057)
通讯作者:  * 张亚梅,东南大学结构工程专业博士,东南大学材料科学与工程学院教授、博士研究生导师、副院长,江苏省先进土木工程材料协同创新中心副主任,2015 年东南大学“十佳导师”。1990 年毕业于东南大学土木系获学士学位,1998 年毕业于东南大学材料系获博士学位。曾任江苏省土木工程材料重点实验室常务副主任。现为 ACI CC(美国混凝土学会中国分会)理事,SAC(中国国家标准化委员会)注册 ISO TC71 专家,中国混凝土与水泥制品协会固废分会建筑固废专委会主任委员,中国土木工程学会再生混凝土分会副主任委员,中国硅酸盐学会水泥化学分会委员,中国混凝土与水泥制品协会预制混凝土构件分会理事,fib(The International Federation for Structural Concrete) TG3.10 委员,fib com.9委员。日本可持续发展协会客座研究员。负责或参与国家自然科学基金项目、973 项目子题、重大工程技术攻关项目及企业合作项目等 40 多项;曾获教育部科技进步二等奖、华夏建设科技一等奖等。研究方向:固体废弃物的资源化利用技术,碱激发胶凝材料,建筑节能新材料,高性能纤维增强水泥基复合材料,3D打印混凝土等。ymzhang@seu.edu.cn   
作者简介:  霍彬彬,2021年9月毕业于东南大学,获得工学博士学位。现为中国矿业大学矿业工程学院师资博士后。目前主要研究领域为固体废弃物用作水泥矿物掺合料和充填材料。
引用本文:    
霍彬彬, 陈春, 张亚梅. 磷酸改性钢渣粉复合氢氧化钙浆体早期水化与微观结构[J]. 材料导报, 2023, 37(15): 21100115-5.
HUO Binbin,CHEN Chun, ZHANG Yamei. Early-age Hydration and Microstructure of Phosphoric Acid Modified Steel Slag Powder Blended Portlandite Pastes. Materials Reports, 2023, 37(15): 21100115-5.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21100115  或          http://www.mater-rep.com/CN/Y2023/V37/I15/21100115
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