盐冻作用后风积沙混凝土孔结构对抗压强度影响的灰熵分析

doi:10.11896/cldb.21050176

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (3290KB)
Export: BibTeX | EndNote (RIS)

Abstract To investigate the influence of pore structure on the compressive strength of aeolian sand concrete in salt-freezing environment, concrete samples with different aeolian sand content were tested for their the compressive strength and nuclear magnetic resonance pore structure. At the same time, the grey entropy method was used to analyze how freeze-thaw induced characteristic parameters of pore structure impact the compressive strength of concrete after freezing. Further, a composite compressive strength model under different freeze-thaw cycles was established with pore parameters and aeolian sand contribution rate as predictors. The results show that the increase of freeze-thaw cycles results in the decrease of the compressive strength and bound fluid saturation of concrete specimens and the increase of the porosity and free fluid saturation. When the content of aeolian sand is less than 30%, the frost resistance of concrete is enhanced, and when the aeolian sand content is 20%, the compressive strength, porosity and bound fluid saturation of concrete show the best damage resistance. The grey entropy analysis reveals that the saturation of the bound fluid and the proportion of pore volume with a pore diameter of less than 10 μm have a high correlation with the compressive strength. This research has established a well-fitted composite compressive strength model with predictors of bound fluid saturation, the proportion of pore volume with a diameter of less than 10 μm, and the effective contribution rate of aeolian sand. It will provide a theoretical basis for the promotion of aeolian sand concrete in the northwest region.

Key words： concrete compressive strength pore bound fluid saturation grey entropy

Published: Online: 2023-02-08

CLC number:

TU528

Fund:National Natural Science Foundation of China (52268044), the Natural Science Foundation of Inner Mongolia Autonomous Region (2020BS05008, 2021LHMS05019),and the Inner Mongolia University of Science and Technology Innovation Fund Project (2019QDL-B48).

Corresponding Authors: dw617@126.com

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DONG Wei
	FU Qianwang
	SHEN Xiangdong
	XUE Huijun
	WANG Yaohong
	LI Zhiqiang

Cite this article:

DONG Wei,FU Qianwang,SHEN Xiangdong, et al. Grey Entropy Analysis on Effect of Pore Structure on Compressive Strength of Aeolian Sand Concrete After Salt-freezing[J]. Materials Reports, 2023, 37(2): 21050176-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.21050176 OR http://www.mater-rep.com/EN/Y2023/V37/I2/21050176

1 Elipe M G M, López-querol S. Construction and Building Materials, 2014, 73(30), 728.
2 Dong W, Shen X D, Xue H J, et al. Construction and Building Materials, 2016, 123, 792.
3 Dong Wei, Xiao Yang, Su Ying, et al. Advanced Engineering Sciences, 2020, 52(3), 86(in Chinese).
董伟, 肖阳, 苏英, 等. 工程科学与技术, 2020, 52(3), 86.
4 Li Y G, Zhang H Z, Liu G X, et al. Construction and Building Materials, 2020, 247, 118538.
5 Li Y G, Zhang H Z, Liu G X, et al. Advances in Civil Engineering, 2019, 3, 1.
6 Li Yugen, Zhang Huimei, Liu Guangxiu, et al. Journal of Building Materials, 2020, 23(5), 1212(in Chinese).
李玉根, 张慧梅, 刘光秀, 等. 建筑材料学报, 2020, 23(5), 1212.
7 Lyu Shuai. Experimental study on mechanical properties and microstructure of aeolian sand-fly ash concrete. Master's Thesis, Inner Mongolia University of Science and Technology, China, 2018(in Chinese).
吕帅. 风积沙-粉煤灰混凝土力学性能及微观结构试验研究. 硕士学位论文, 内蒙古科技大学, 2018.
8 Su Ying. Research on durability of aeolian sand concrete in salt-freezing environment. Master's Thesis, Inner Mongolia University of Science and Technology, China, 2019(in Chinese).
苏英. 盐冻环境下风积沙混凝土耐久性研究. 硕士学位论文, 内蒙古科技大学, 2019.
9 Xue H J, Shen X D, Liu Q, et al. Journal of Advanced Concrete Technology, 2017, 15(12), 724.
10 Xue Huijun, Shen Xiangdong, Zou Chunxia, et al. Journal of Building Materials, 2019, 22(2), 199(in Chinese).
薛慧君, 申向东, 邹春霞, 等. 建筑材料学报, 2019, 22(2), 199.
11 Shen Xiangdong, Zou Yuxiao, Xue Huijun, et al. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(2), 161(in Chinese).
申向东, 邹欲晓, 薛慧君, 等. 农业工程学报, 2019, 35(2), 161.
12 Zou Y X, Shen X D, Zuo X B, et al. European Journal of Environmental and Civil Engineering, 2020, 26(4), 1267.
13 Wu Junchen. Durability research and service life prediction of aeolian sand concrete under complex environment. Ph. D. Thesis, Inner Mongolia Agricultural University, 2018(in Chinese).
吴俊臣. 复杂环境下风积沙混凝土的耐久性能研究与寿命预测. 博士学位论文, 内蒙古农业大学, 2018.
14 Wang X X, Liu C, Liu S G, et al. Construction and Building Materials, 2020, 247, 118431.
15 Bu J, Tian Z. Sādhanā, 2016, 41(3), 1.
16 Yuan, J, Wu Y, Zhang J K. Construction and Building Materials, 2018, 168, 975.
17 Jin S S, Zhang J X, Han S. Construction and Building Materials, 2017, 135, 1.
18 Liu Qian, Shen Xiangdong, Dong Ruixin, et al. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(10), 108(in Chinese).
刘倩, 申向东, 董瑞鑫, 等. 农业工程学报, 2019, 35(10), 108.
19 Liu Q, Shen X D, Wei L S, et al. JOM, 2019, 72, 1.
20 Zhao Yanru, Liu Fangfang, Wang Lei, et al. Materials Reports B:Research Papers, 2020, 34(6), 12064(in Chinese).
赵燕茹, 刘芳芳, 王磊, 等. 材料导报:研究篇, 2020, 34(6), 12064.
21 Zhao Yanru, Wang Zhihui, Wang Lei, et al. Journal of Building Materials, 2019, 22(1), 45(in Chinese).
赵燕茹, 王志慧, 王磊, 等. 建筑材料学报, 2019, 22(1), 45.
22 Shen A Q, Lin S L, Guo Y C, et al. Construction and Building Materials, 2018, 174, 684.
23 Xue Cuizhen, Shen Aiqin, Qiao Hongxia. Journal of South China University of Technology(Natural Science Edition), 2020, 48(3), 136(in Chinese).
薛翠真, 申爱琴, 乔宏霞. 华南理工大学学报(自然科学版), 2020, 48(3), 136.
24 Sheng B Z, Jun L L, Wei A X, et al. Advances in Materials Science and Engineering, 2017, 2017, 1.