Effects of cellulose nanocrystals on improving the acid resistance of cementitious composites in mining

Lin-ping Wu; Guang-ping Huang; Chao-shi Hu; Wei Victor Liu

doi:10.1007/s12613-020-2087-z

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Effects of cellulose nanocrystals on improving the acid resistance of cementitious composites in mining

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Received: 4 April 2020; Revised: 5 May 2020; Accepted: 6 May 2020; Available online: 9 May 2020

Abstract

Acid mine drainage has been an important threat to cementitious structures. To improve the acid resistance of cementitious composites used under acid mine drainage attack, this study is aimed at investigating the effect of cellulose nanocrystals (CNCs) on the acid resistance of cementitious composites. CNCs were added to the mortar mixtures as additives at cement volume ratios of 0.2%, 0.4%, 1% and 1.5%. After 28 days of standard curing, the samples were immersed in sulfuric acid with a pH of 2 for 75 days. The unconfined compressive strength (UCS) test, density, absorption and voids test and thermo-gravimetric analysis (TGA) were carried out to investigate the properties of CNC mixtures before sulfuric acid immersion. It was found that the addition of CNC reduced the volume of permeable voids and increased the hydration degree and mechanical strength. Changes in mass and length were monitored during immersion to evaluate the acid resistance of mixtures. The mixture with 0.4% CNC showed improved acid resistance due to the reduced mass change and length change after brushing.

References

[1]	Gai-rong Wang,Hong-ying Yang,Yuan-yuan Liu,Lin-lin Tong, and Ali Auwalu, Study on the mechanical activation of malachite and the leaching of complex copper ore in the Luanshya mining area, Zambia, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1856-z
[2]	Li-yuan Liu,Hong-guang Ji,Xiang-feng Lv,Tao Wang,Sheng Zhi,Feng Pei, and Dao-lu Quan, Mitigation of greenhouse gases released from mining activities: A review, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2155-4
[3]	Chong-chong Qi,Andy Fourie,Qiu-song Chen, and Ryan Veenstra, Editorial for special issue on mitigating the impacts of mining, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2152-7
[4]	Chong-chong Qi, Erratum to: Big data management in the mining industry, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2051-y
[5]	Chong-chong Qi, Big data management in the mining industry, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1937-z
[6]	Chun-duo Dai,Yu Fu,Jia-xiang Guo, and Cui-wei Du, Effects of substrate temperature and deposition time on the morphology and corrosion resistance of FeCoCrNiMo_0.3 high-entropy alloy coating fabricated by magnetron sputtering, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2149-2
[7]	Bao Liu,Shuo Wang,Cheng-yan Wang,Bao-zhong Ma, and Yong-qiang Chen, Electrochemical behavior and corrosion resistance of IrO₂–ZrO₂ binary oxide coatings for promoting oxygen evolution in sulfuric acid solution, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1847-0
[8]	Er-hu Qu, Ming-zhe Li, and Rui Li, Improving effect on forming quality and accuracy using a polyurethane board positioning/resetting the discrete steel pad in multi-point forming, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1752-6
[9]	Feray Kocan and Umran Hicsonmez, Leaching kinetics of celestite in nitric acid solutions, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1705-0
[10]	Dong Li, Jun-fei Zhang, Cun-wen Wang, and Fu-xing Jiang, Propagation patterns of microseismic waves in rock strata during mining: an experimental study, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1761-5
[11]	Hua-zhe Jiao, Shu-fei Wang, Ai-xiang Wu, Hui-ming Shen, and Jian-dong Wang, Cementitious property of NaAlO₂-activated Ge slag as cement supplement, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1901-y
[12]	A. V. Koltygin, V. E. Bazhenov, R. S. Khasenova, A. A. Komissarov, A. I. Bazlov, and V. A. Bautin, Effects of small additions of Zn on the microstructure, mechanical properties and corrosion resistance of WE43B Mg alloys, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-019-1801-1
[13]	Feng Zhang, De-qing Zhu, Jian Pan, Ya-ping Mo, and Zheng-qi Guo, Improving the sintering performance of blends containing Canadian specularite concentrate by modifying the binding medium, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1607-6
[14]	M. K. El Fawkhry, Feasibility of new ladle-treated Hadfield steel for mining purposes, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1573-z
[15]	Qian-yu Sun, Wan-zhong Yin, Dong Li, Ya-feng Fu, Ji-wei Xue, and Jin Yao, Improving the sulfidation-flotation of fine cuprite by hydrophobic flocculation pretreatment, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1678-4
[16]	Ping-hu Chen, Yi-bo Li, Rui-qing Li, Ri-peng Jiang, Song-sheng Zeng, and Xiao-qian Li, Microstructure, mechanical properties, and wear resistance of VC_p-reinforced Fe-matrix composites treated by Q&P process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1657-9
[17]	Ali Shabani, Mohammad Reza Toroghinejad, and Alireza Bagheri, Effects of intermediate Ni layer on mechanical properties of Al–Cu layered composites fabricated through cold roll bonding, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1604-9
[18]	Cheng-zhuang Lu, Jing-yuan Li, and Zhi Fang, Effects of asymmetric rolling process on ridging resistance of ultra-purified 17%Cr ferritic stainless steel, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1564-0
[19]	M. Siva Prasad, M. Ashfaq, N. Kishore Babu, A. Sreekanth, K. Sivaprasad, and V. Muthupandi, Improving the corrosion properties of magnesium AZ31 alloy GTA weld metal using microarc oxidation process, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1438-x
[20]	Qing Zhao, Cheng-jun Liu, Bao-kuan Li, and Mao-fa Jiang, Decomposition mechanism of chromite in sulfuric acid-dichromic acid solution, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1528-9

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Effects of cellulose nanocrystals on improving the acid resistance of cementitious composites in mining

Corresponding author:

Wei Victor Liu E-mail: victor.liu@ualberta.ca

1. School of Mining and Petroleum Engineering, University of Alberta, Edmonton, Alberta T6G 2E3, Canada

2. Utility Planning & Design, EPCOR Utilities Inc, Edmonton, AB T5M 3B8, Canada

Received: 4 April 2020
Revised: 5 May 2020
Accepted: 6 May 2020
Available online: 9 May 2020

Abstract: Acid mine drainage has been an important threat to cementitious structures. To improve the acid resistance of cementitious composites used under acid mine drainage attack, this study is aimed at investigating the effect of cellulose nanocrystals (CNCs) on the acid resistance of cementitious composites. CNCs were added to the mortar mixtures as additives at cement volume ratios of 0.2%, 0.4%, 1% and 1.5%. After 28 days of standard curing, the samples were immersed in sulfuric acid with a pH of 2 for 75 days. The unconfined compressive strength (UCS) test, density, absorption and voids test and thermo-gravimetric analysis (TGA) were carried out to investigate the properties of CNC mixtures before sulfuric acid immersion. It was found that the addition of CNC reduced the volume of permeable voids and increased the hydration degree and mechanical strength. Changes in mass and length were monitored during immersion to evaluate the acid resistance of mixtures. The mixture with 0.4% CNC showed improved acid resistance due to the reduced mass change and length change after brushing.

Effects of cellulose nanocrystals on improving the acid resistance of cementitious composites in mining

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通讯作者: 陈斌, bchen63@163.com

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