Vol.10, No.11, 2022, pp.3041-3058, doi:10.32604/jrm.2022.020054
OPEN ACCESS
ARTICLE
Fabrication of Baking-Free Bricks Using Gold Tailings and Cemented Materials with Low Alkalinity
  • Jiamao Li1,2,*, Tao Si1, Lin Li1, Chuangang Fan1,*, Zhaofang He3, Yuandi Qian3
1 School of Materials Science and Engineering, Anhui University of Technology, Maanshan, 243032, China
2 Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Maanshan, 243002, China
3 China MCC17 Group Co., Ltd., Maanshan, 243000, China
* Corresponding Authors: Jiamao Li. Email: ; Chuangang Fan. Email:
Received 01 November 2021; Accepted 23 December 2021; Issue published 29 June 2022
Abstract
The purpose of this paper was using gold mine tailings and cemented materials with low alkalinity to fabricate baking-free bricks. The obtained baking-free brick samples were evaluated by unconfined compressive strength (UCS), water absorption percentage, freezing-thawing cycle, and drying-wetting cycle. The microstructures of the baking-free brick samples were analyzed using X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The baking-free brick specimens cured for 28 days with the addition of 10% mixing water consumption and 1:6 cement/tailing ratio tended to obtain favorable comprehensive properties such as a high compressive strength of 15.15 MPa, a low water absorption percentage of 11.8%, excellent freezing-thawing resistance with a 8.9% UCS loss rate after 15 freezing-thawing cycles and good drying-wetting resistance with a 11% UCS loss rate after 10 drying-wetting cycles. The XRD and SEM test results verified that different kinds of hydrate products including C-S-H and C-S-A-H gels, and ettringite were produced during hydration process, which were responsible for good physical, mechanical properties, and durability of the obtained baking-free bricks. Therefore, the experimental results showed that it was practical and reasonable to utilize the homemade cementitious materials in our laboratory to stabilize the gold tailings for production of baking-free bricks, which still met the requirements of major regional construction standards in some countries.
Graphical Abstract
Fabrication of Baking-Free Bricks Using Gold Tailings and Cemented Materials with Low Alkalinity
Keywords
Baking-free brick; low alkali cementitious binder; solid waste utilization; compressive strength; freezing-thawing; drying-wetting
Cite This Article
Li, J., Si, T., Li, L., Fan, C., He, Z. et al. (2022). Fabrication of Baking-Free Bricks Using Gold Tailings and Cemented Materials with Low Alkalinity. Journal of Renewable Materials, 10(11), 3041–3058.
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