混凝土再生微粉颗粒特征及其砂浆性能研究

doi:10.11896/cldb.20110258

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Abstract In order to improve the efficient recycling efficiency of concrete powder of construction waste (hereinafter referred to as concrete powder), based on the test and analysis of the particle characteristics of cement, concrete powder and silica fume cementitious system, the influence of cement concrete powder, cement concrete powder silica fume binary and ternary system on the dense filling effect of cementitious materials was studied by using the Dinger-Funk model. Based on the theory of grey correlation entropy and SEM micro test method, the influence of the particle characteristics of concrete powder on mortar strength and internal structure compactness of mortar was also discussed. The research results showed that the single mixing of finer concrete powder reduced the early strength of the mortar, when the mixing amount was controlled at 10%—20%, the 28 d microscopic morphology appeared compact, and the later strength was improved. When the concrete powder-silica fume was mixed, the silica fume was further filled with the particle pores of cement concrete powder, which further improves the compaction of the cementitious material system, and the 28 d strength was significantly improved. The content of concrete powder particles with the diameter range of 10—20 μm was positively related to the mechanical properties of mortar and the filling effect of cementitious material system, and the content of concrete powder particles with the diameter more than 40 μm was negatively correlated with it. In summary, in order to ensure the strength of the mortar and maximize the use of concrete powder, the content of particles with the diameter less than 40 μm should be increased as much as possible, especially the content of particles with the diameter less than 10 μm. The content of particles with the diameter more than 60 μm should be reduced to optimize the particle gradation of concrete. At the same time, the replacement amount should be controlled within 20%. This work will provide theoretical and technical support for the fineness control and high efficiency recycling of construction waste concrete powder.

Key words： concrete powder particle parameter particle distribution filling effect the theory of grey relation entropy

Published: Online: 2022-05-24

CLC number:

TP319.56

Fund:Research on Corrosion Performance and Mechanism of Construction Waste Recycled Micro-powder Concrete in Cold and Arid Areas of Northwest China (20JR5RA440), Research on Impermeability and Crack Resistance of Super Long Pool Concrete in Special Areas of Northwest China (1602202000219004).

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	Articles by authors
	FU Yong
	XUE Cuizhen
	HE Jianghong
	LIU Yuguo
	ZHU Xiangchen

Cite this article:

FU Yong,XUE Cuizhen,HE Jianghong, et al. Study on the Particle Characteristics of Recycled Concrete Powder and the Performance of Mortar[J]. Materials Reports, 2022, 36(10): 20110258-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20110258 OR http://www.mater-rep.com/EN/Y2022/V36/I10/20110258

1 Issam A , Dalal B , Kenin B, et al. Construction & Building Materials, 2019, 226, 555.
2 Peng G F, Zhang J. Key Engineering Materials Vols, 2015, 314,320.
3 Liu C, Hu T F, Liu H W, et al. Journal of Building Materials, 2021,24(4),726 (in Chinese).
刘超, 胡天峰, 刘化威, 等.建筑材料学报, 2021, 24(4), 726.
4 Chen J J, Qin Y J, Xiao J Z, et al. Journal of Building Materials, 2021, 24(6),8 (in Chinese).
陈洁静, 秦拥军, 肖建庄, 等.建筑材料学报, 2021, 24(6), 8.
5 Braga M, Be B J, Veiga R. Materials and Structures, 2014, 47, 171.
6 Qin L, Gao X J. Waste Management, 2019, 89, 254.
7 Wang S. Effect of mineral admixture on performance of interface transition zone and pore structure of concrete. Master's Thesis, Harbin Institute of Technology, China, 2018 (in Chinese).
王双. 掺合料对混凝土的界面过渡区性能及孔结构的影响研究. 硕士学位论文, 哈尔滨工业大学, 2018.
8 Li K, Zang Q, Luo M, et al. Construction & Building Materials, 2014, 51(1), 329.
9 Liu S H. Journal of Building Materials, 2010(2), 218 (in Chinese).
刘数华.建筑材料学报, 2010(2), 218.
10 Ding X Q, Xing W, Li H. Concrete, 2018(11), 94 (in Chinese).
丁向群, 邢伟, 李贺.混凝土, 2018(11), 94.
11 Liu S. China Building Materials Science and Technology, 2018, 27(2), 52 (in Chinese).
刘升.中国建材科技, 2018, 27(2), 52.
12 Kang M. Fly Ash, 2015,27(3),14 (in Chinese).
康明. 粉煤灰, 2015,27(3), 14.
13 Zhang Y J, Zhang X. Cement Technology, 2006(5), 36 (in Chinese).
张永娟, 张雄.水泥技术, 2006(5),36.
14 He X Y, Chen Y M, Ma B G, et al. Materials Reports, 2008(5),89.
贺行洋, 陈益民, 马保国, 等.材料导报, 2008(5), 89.
15 Xue C Z, Shen A Q, Guo Y C. Materials Reports B:Research Papers, 2019, 33(4),1348 (in Chinese).
薛翠真, 申爱琴, 郭寅川. 材料导报:研究篇, 2019, 33(4), 1348.
16 Xue C Z, Shen A Q, Qiao H X.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.
17 Vitoria G M, Jose A A, Jojo B B. Advanced Materials Research. 2020, 4629,97.
18 Cui G, Liu J Z, Yao T, et al. Journal of Southeast University (Natural Science Edition), 2010, 40(S2), 15 (in Chinese).
崔巩, 刘建忠, 姚婷, 等. 东南大学学报(自然科学版), 2010, 40(S2), 15.
19 Andreasen A H M. Kolloid-Zeitschrift, 1930, 50(3),217.
20 Youa M L, Shub C M, Chencw T, et al. Journal of Cleaner Production, 2017, 142(4),3883.
21 Cai K F, Wang D F. Structural and Multidisciplinary Optimization, 2017, 56(6),1539.