Research on Mechanical Properties and Durability of Concrete Improved by Pyrite Tailings and Slag

Feng Ka; Wang Xinyu

doi:10.3969/j.issn.1000-6532.2022.03.002

2022 No. 3

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Article navigation > Multipurpose Utilization of Mineral Resources > 2022 > 43(3): 6-11, 16

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Feng Ka, Wang Xinyu. Research on Mechanical Properties and Durability of Concrete Improved by Pyrite Tailings and Slag[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(3): 6-11, 16. doi: 10.3969/j.issn.1000-6532.2022.03.002

Citation:

Feng Ka, Wang Xinyu. Research on Mechanical Properties and Durability of Concrete Improved by Pyrite Tailings and Slag[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(3): 6-11, 16. doi: 10.3969/j.issn.1000-6532.2022.03.002

Research on Mechanical Properties and Durability of Concrete Improved by Pyrite Tailings and Slag

Feng Ka^1,,
Wang Xinyu²

1.
Beijing Jiaotong Vocational Technical College, Beijing, China
2.
Xinyang Vocational and Technical College, Institute of Civil Engineering, XinYang, Henan, China

Received Date: 02 August 2020

Publish Date: 25 June 2022

Abstract

Abstract

In order to study the mechanical properties of the pyrite slag in the Northern Guizhou area after replacing the concrete aggregate, the X-ray diffraction instrument was used to analyze the phase and mineral composition of the pyrite tailings slag in the Northern Guizhou area. Pyrite tailings slag will be used to prepare pyrite tailings slag modified concrete. Its mechanical properties and freeze-thaw characteristics will be studied. The results show that the increase of the pyrite tailings slag content can prolong the setting time of the improved concrete. When the pyrite tailings slag content is 20% and the water-cement ratio of concrete is 0.40, the 7 d compressive strength and 28 d compressive strength of the modified concrete are the highest. Under the same hydration time, the hydration heat release rate, hydration heat release and DTA value of concrete continue to decrease with the increase of the pyrite tailings slag content. At the same time, as the number of freeze-thaw cycles continues to increase, the compressive strength of concrete continues to decrease and the frost resistance index also continues to decrease. This shows that freeze-thaw cycles can weaken the ability of cement-solidified soil to resist deformation and reduce the bearing capacity.
- Pyrite tailings slag /
- Mechanical properties /
- Durability /
- Freeze-thaw cycle /
- Hydration heat release /
- DTA

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References

[1]	丁湛, 文书明, 李春龙, 等. 铁矿石脱磷硫工艺现状及同步脱除新方法[J]. 矿产综合利用, 2020(3):56-62+32. doi: 10.3969/j.issn.1000-6532.2020.03.009 CrossRef Google Scholar DING Z, WEN S M, LI C L, et al. Status quo of iron ore dephosphorization and sulfur removal process and a new method of simultaneous removal[J]. Comprehensive Utilization of Mineral Resources, 2020(3):56-62+32. doi: 10.3969/j.issn.1000-6532.2020.03.009 CrossRef Google Scholar
[2]	叶劲松, 陈天虎, 唐梦娟, 等. 硫铁矿尾矿中铜的硫酸浸出[J]过程工程学报, 2020, 20(9): 1053-1062. Google Scholar YE J S, CHEN T H, TANG M J, et al. Sulfuric acid leaching of copper from pyrite tailings [J]. Journal of Process Engineering, 2020, 20(9): 1053-1062. Google Scholar
[3]	王锐刚, 郭方峥, 杨春. 黄铁矿废渣/H₂O₂体系处理造纸废水的研究[J]. 矿产综合利用, 2019(6):89-93. doi: 10.3969/j.issn.1000-6532.2019.06.020 CrossRef Google Scholar WANG R G, GUO F Z, YANG C. Treatment of papermaking wastewater in pyrite slag/H₂O₂ system[J]. Multipurpose Utilization of Mineral Resources, 2019(6):89-93. doi: 10.3969/j.issn.1000-6532.2019.06.020 CrossRef Google Scholar
[4]	闫永胜, 刘淮, 李春香, 等. 用硫铁矿焙烧废渣制铁铝净水剂和白炭黑工艺的研究[J]. 无机盐工业, 1993(4):39-41. Google Scholar YAN Y S, LIU H, LI C X, et al. Study on the process of producing iron and aluminum water purifier and silica by using pyrite roasting waste residue[J]. Inorganic Chemicals Industry, 1993(4):39-41. Google Scholar
[5]	Godfrey Madzivire, Peane P Maleka, Viswanath RK, et al. Fate of the naturally occurring radioactive materials during treatment of acid mine drainage with coal fly ash and aluminium hydroxide[J]. Journal of Environmental Management, 2014:133. Google Scholar
[6]	郭铮. 川南高岭石型硫铁矿浮选尾矿作水泥混合材及混凝土掺合料研究[D]. 绵阳: 西南科技大学, 2016. Google Scholar GUO Z. Research on flotation tailings of kaolinite-type pyrite in southern Sichuan as cement admixture and concrete admixture [D]. Mianyang: Southwest University of Science and Technology, 2016. Google Scholar
[7]	张跃, 唐明林, 龚家竹, 等. 硫铁矿生产硫磺尾渣用于建筑涂料的生产研究[J]. 无机盐工业, 2013, 45(1):42-43. doi: 10.3969/j.issn.1006-4990.2013.01.014 CrossRef Google Scholar ZHANG Y, TANG M L, GONG J Z, et al. Study on the production of sulphur tailings from pyrite production for architectural coatings[J]. Inorganic Salt Industry, 2013, 45(1):42-43. doi: 10.3969/j.issn.1006-4990.2013.01.014 CrossRef Google Scholar
[8]	赵河闯, 朱艳超, 李恩, 等. 亚硝酸钙对硫铝酸盐水泥水化硬化过程的影响[J]. 湖北大学学报(自然科学版), 2020, 42(3):284-288. Google Scholar ZHAO H C, ZHU Y C, LI E, et al. Effect of calcium nitrite on the hydration and hardening process of sulfoaluminate cement[J]. Journal of Hubei University (Natural Science Edition), 2020, 42(3):284-288. Google Scholar
[9]	王一峰. 固化剂改良铁尾矿路用性能研究[D]. 张家口: 河北建筑工程学院, 2019. Google Scholar WANG Y F. Study on the road performance of iron tailings improved by curing agent[D]. Zhangjiakou: Hebei Institute of Civil Engineering and Architecture, 2019. Google Scholar