Basic Characteristics of Concrete Prepared with Activated Coal Powder instead of Cement

FENG Na; CUI Zizhi; LI Yongqin; YUAN Fei

doi:10.3969/j.issn.1000-6532.2024.02.013

2024 No. 2

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Article navigation > Multipurpose Utilization of Mineral Resources > 2024 > 45(2): 81-88

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FENG Na, CUI Zizhi, LI Yongqin, YUAN Fei. Basic Characteristics of Concrete Prepared with Activated Coal Powder instead of Cement[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(2): 81-88. doi: 10.3969/j.issn.1000-6532.2024.02.013

Citation:

FENG Na, CUI Zizhi, LI Yongqin, YUAN Fei. Basic Characteristics of Concrete Prepared with Activated Coal Powder instead of Cement[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(2): 81-88. doi: 10.3969/j.issn.1000-6532.2024.02.013

Basic Characteristics of Concrete Prepared with Activated Coal Powder instead of Cement

1.
School of Civil Engineering and Architecture, Yinchuan Institute of Energy, Yinchuan 750000, Ningxia, China
2.
School of Civil and Water Conservancy Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
3.
School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China
4.
Shanxi Institute of Architecture and Technology, Taiyuan 030006, Shanxi, China

Received Date: 10 July 2022

Publish Date: 25 April 2024

Abstract

Abstract

This is an article in the field of ceramics and composites.To explore the feasibility of using coal waste to replace cement for concrete preparation, the activated coal slag powder and coal gangue powder were used to replace cement at a ratio of 0%, 10%, 20%, 30%, and 40% to prepare concrete samples and prepare concrete samples. The slump, compressive strength, flexural strength and high-temperature performance were tested, and the results show that: as the substitution ratio increases, the slump, compressive strength and flexural strength all increase first and then decrease; The optimal substitution ratio is 20%～30%. The early strength growth rate of the activated coal slag powder sample is large; while the long-term strength growth rate of the activated coal gangue powder sample is large. When the water-cement ratio=0.45, the compressive strength of the sample increases first and then decreases with the increase of temperature, and reaches the maximum at 100 ℃; when the water-cement ratio=0.5, the compressive strength of the concrete sample increases with the temperature; the hydration cement structure in the interface area of the activated coal slag powder sample is the most, followed by the control group, and the activated coal gangue powder sample is the least. With the increase in temperature, the pores and cracks on the surface of the sample increased significantly and the degree of fracture of the damaged surface gradually increased.
- Ceramics and composites /
- Concrete /
- Coal waste /
- Slump /
- Strength /
- High temperature resistance

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References

[1]	施惠生, 娄邦. 利用煤渣替代砂研制混凝土小型空心砌块[J]. 新型建筑材料, 2005(1):9-11.SHI H S, LOU B. Development of concrete small hollow blocks using cinder as a substitute for sand[J]. New Building Materials, 2005(1):9-11. Google Scholar SHI H S, LOU B. Development of concrete small hollow blocks using cinder as a substitute for sand[J]. New Building Materials, 2005(1):9-11. Google Scholar
[2]	赵世冉, 张凯峰, 米钰, 等. 煤渣-陶粒混凝土挤压内墙板的实验研究[J]. 新型建筑材料, 2014, 41(12):20-22.ZHAO S R, ZHANG K F, MI Y, et al. Experimental study of cinder-ceramic concrete extruded interior wall panels[J]. New Building Materials, 2014, 41(12):20-22. Google Scholar ZHAO S R, ZHANG K F, MI Y, et al. Experimental study of cinder-ceramic concrete extruded interior wall panels[J]. New Building Materials, 2014, 41(12):20-22. Google Scholar
[3]	夏群, 易磊, 朱平华, 等. 掺煤渣的再生混凝土保温空心砌块力学行为与热工性能研究[J]. 混凝土, 2016(9):106-110.XIA Q, YI L, ZHU P H, et al. Research on mechanical behavior and thermal properties of recycled concrete insulated hollow core blocks with cinder doping[J]. Concrete, 2016(9):106-110. Google Scholar XIA Q, YI L, ZHU P H, et al. Research on mechanical behavior and thermal properties of recycled concrete insulated hollow core blocks with cinder doping[J]. Concrete, 2016(9):106-110. Google Scholar
[4]	张立明, 李佳, 刘福明. 掺活化煤渣粉混凝土表面氯离子浓度的时变规律[J]. 混凝土, 2017(8):96-98+110.ZHANG L M, LI J, LIU F M. Time-varying pattern of chloride ion concentration on the surface of concrete with activated cinder powder[J]. Concrete, 2017(8):96-98+110. Google Scholar ZHANG L M, LI J, LIU F M. Time-varying pattern of chloride ion concentration on the surface of concrete with activated cinder powder[J]. Concrete, 2017(8):96-98+110. Google Scholar
[5]	张立明, 余红发. 煤渣粉掺量对再生混凝土氯离子扩散系数的影响[J]. 硅酸盐通报, 2017, 36(7):2332-2336+2342.ZHANG L M, YU H F. Effect of cinder powder admixture on chloride ion diffusion coefficient of recycled concrete[J]. Silicate Bulletin, 2017, 36(7):2332-2336+2342. Google Scholar ZHANG L M, YU H F. Effect of cinder powder admixture on chloride ion diffusion coefficient of recycled concrete[J]. Silicate Bulletin, 2017, 36(7):2332-2336+2342. Google Scholar
[6]	王庆贺, 李喆, 周梅, 等. 自燃煤矸石骨料取代率对煤矸石混凝土梁受弯性能的影响[J]. 建筑结构学报, 2020, 41(12):64-74.WANG Q H, LI Z, ZHOU M, et al. Effect of self-combustion gangue aggregate substitution rate on the bending performance of gangue concrete beams[J]. Journal of Building Structures, 2020, 41(12):64-74. Google Scholar WANG Q H, LI Z, ZHOU M, et al. Effect of self-combustion gangue aggregate substitution rate on the bending performance of gangue concrete beams[J]. Journal of Building Structures, 2020, 41(12):64-74. Google Scholar
[7]	白国良, 朱超, 王建文, 等. 煤矸石混凝土梁受剪性能实验研究[J]. 建筑结构学报, 2020, 41(12):49-55.BAI G L, ZHU C, WANG J W, et al. Experimental study on shear performance of gangue concrete beams[J]. Journal of Building Structures, 2020, 41(12):49-55. Google Scholar BAI G L, ZHU C, WANG J W, et al. Experimental study on shear performance of gangue concrete beams[J]. Journal of Building Structures, 2020, 41(12):49-55. Google Scholar
[8]	Yao Z, Fang Y, Kong W, et al. Experimental study on dynamic mechanical properties of coal gangue concrete[J]. Advances in Materials Science and Engineering, 2020, 2020(13):1-16. Google Scholar
[9]	Ma H, Zhu H, Wu C, et al. Effect of shrinkage reducing admixture on drying shrinkage and durability of alkali-activated coal gangue-slag material[J]. Construction and Building Materials, 2020, 270(3):121372. Google Scholar
[10]	Ni K, Shi Y, Hu Z, et al. Effect of coal gangue grain size on strength of foam concrete[J]. Journal of Physics: Conference Series, 2020, 1635(1): 012080 (8pp). Google Scholar