Effect of Carbonation Curing on Durability of Carbon Fixing Steel Slag‑Slaked Lime Brick

被引：0
|
作者：
Cao W. [1 ]
Yang Q. [2 ]
机构：
[1] Chengdu Huge Construction Material Co.，Ltd., Chengdu
[2] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 03期
关键词：
carbon fixing; durability; steel slag;
D O I：
10.3969/j.issn.1007-9629.2023.03.014
中图分类号：
学科分类号：
摘要：
The effect of carbonation curing process on the durability of the carbon fixing steel slag‑slaked lime brick，such as freezing‑thawing resistance，sulfate resistance and salt crystallization resistance，were investigated. The microstructure of the hardened paste was characterized by X‑ray diffraction analysis，thermal analysis，pore structure analysis and scanning electron microscopy analysis，and the mechanism of durability improvement was revealed. The results show that the durability of carbon fixing steel slag‑slaked lime brick is excellent. During the carbonation process，Ca（OH）2 with poor chemical stability in the carbon fixing steel slag‑slaked lime brick is transformed into CaCO3 with high stability，and the pore structure of the hardened paste is refined，thus the durability of the carbon fixing steel slag‑slaked lime brick is significantly improved. The comprehensive CO2 emission reduction efficiency of the carbon fixing steel slag‑slaked lime brick is 179.4 kg/t，the utilization ratio of steel slag is 238.0 kg/t，and the environmental protection effect is remarkable. © 2023 Tongji University. All rights reserved.
引用
收藏
页码：324 / 331
页数：7
相关论文
共 20 条
  • [1] emissions in 2020［EB/OL］
  • [2] Carbon dioxide separation technology：R&D needs for the chemical and petrochemical industries［EB/OL］
  • [3] SHI C J, QIAN J S., High performance cementing materials from industrial slags‑A review ［J］, Resources Conservation and Recycling, 29, 3, (2000)
  • [4] FERNANDEZ BERTOS M, SIMONS S J R，, HILLS C D, Et al., A review of accelerated carbonation technology in the treatment of cement‑based materials and sequestration of CO［<sub>2</sub> J］, Journal of Hazardous Materials, 112, 3, (2004)
  • [5] HUIJGEN W J J, COMANS R N J., Mineral CO<sub>2</sub> sequestration by steel slag carbonation［J］, Environmental Science & Technology, 39, 24, (2005)
  • [6] DIENER S，, ANDREAS L，, HERRMANN I, Et al., Accelerated carbonation of steel slags in a landfill cover construction［J］, Waste Management, 30, 1, (2010)
  • [7] UTGENANNT P., Microstructural changes caused by carbonation of cement mortar［J］, Cement and Concrete Research, 31, 6, (2001)
  • [8] ZHU Beirong, YANG Quanbing, Study on fixation of CO<sub>2</sub> and production of precipitated calcium carbonate using steel slag［J］, Journal of Building Materials, 14, 4, (2011)
  • [9] Carbonate steelmaking slag to manufacture building materials［J］, Advanced Materials Research, 79, (2009)
  • [10] ZHANG Feng, MO Liwu, DENG Min, Et al., Effect of carbonation curing on mechanical strength and microstructure of mortars prepared with steel slag‑cement‑MgO‑CaO blends［J］, Journal of Building Materials, 20, 6, (2017)
12