再生混凝土抗冻性能试验研究及孔隙分布变化分析

doi:10.11896/cldb.20060204

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (6461KB)
Export: BibTeX | EndNote (RIS)

Abstract The frost resistance durability of recycled concrete is closely related to the change of pore distribution in concrete structure. In order to study the quantitative relationship between pore distribution inside the recycled concrete structure and its frost resistance durability, ordinary recycled concrete and air-entrained recycled concrete with 0%, 25%, 50%, 75% and 100% replacement rate of recycled coarse aggregate were selected as the research objects. Freeze-thaw cycle test and nuclear magnetic resonance test were carried out to test the mass, dynamic modulus of elasticity, flexural strength and pore distribution in the structure. The results show that the air-entraining admixture(AEA) can effectively improve the proportion of mesopores (0.01—0.05 μm) and macropores (0.05—1 μm) in the specimen, so as to improve its frost resistance. In 10 different proportions, the natural aggregate concrete with AEA has the best frost resistance, followed by the recycled concrete with 50% replacement rate of recycled coarse aggregate, which is more stable than that with 25%, 75% and 100% replacement rate of recycled aggregate. The change of flexural strength of recycled concrete after freeze-thaw cycle is closely related to the distribution and proportion of pores in the structure.

Key words： recycled concrete freeze-thaw cycle nuclear magnetic resonance pore distribution flexural strength

Published: Online: 2021-09-07

CLC number:

TU528

Fund:Key Research and Development Foundation of the Science and Technology Department of Shaanxi Province(2018SF-391), the Housing and Urban-Rural Construction Foundation of the Housing and Urban-Rural Department of Shaanxi Province (2017-K55), the Scientific Research Program of the Science and Technology Department of Xi'an (2019217214GXRC008CG009-GXYD8.2).

About author: Xianghui Dengreceived his Ph.D. degree from Xi'an University of Technology (XAUT) in 2011. He is currently a professor in Xi'an Technological University (XATU). His main research interests are support theoretical and numerical analysis of the underground engineering and the frost resistance durability of concrete. In recent years, more than 50 papers have been published at home and abroad and 15 of these papers were retrieved by SCI and EI.

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DENG Xianghui
	GAO Xiaoyue
	WANG Rui
	ZHAO Chongji

Cite this article:

DENG Xianghui,GAO Xiaoyue,WANG Rui, et al. Study on Frost Resistance and Pore Distribution Change of Recycled Concrete[J]. Materials Reports, 2021, 35(16): 16028-16034.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20060204 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16028

1 Cao W L, Zhao Y X, Ye T P. Journal of Harbin Institute of Technology, 2019, 51(6), 1(in Chinese).
曹万林,赵羽习,叶涛萍. 哈尔滨工业大学学报, 2019, 51(6), 1.
2 Kolay P K, Sulalman S O, Kumar S. Advances in Civil Engineering Materials, 2018, 7(3), 328.
3 Guo K, Ma H H, Yang F S, et al. Journal of Building Materials, 2020, 23(1), 230(in Chinese).
郭凯,马浩辉,杨丰硕,等. 建筑材料学报, 2020, 23(1), 230.
4 Liu C, Liu H W, Zhu C, et al. China Civil Engineering Journal, 2019, 52(11), 37(in Chinese).
刘超,刘化威,朱超,等. 土木工程学报, 2019, 52(11), 37.
5 Amorim N S, Silva G A O, Ribeiro D V. Construction and Building Materials, 2018, 161, 723.
6 Guo Z G, Chen C, Fan B J, et al. Journal of Building Structures, 2016, 37(S2), 94(in Chinese).
郭樟根, 陈晨, 范秉杰, 等. 建筑结构学报, 2016, 37(S2), 94.
7 Roumiana Z, Buyle-Bodin F, Wirquin E. Cement and Concrete Research, 2004, 34(10), 1927.
8 Alexandre J, Brito J, Ramos D. Journal of Cleaner Production, 2016, 11, 294.
9 Li Y, Wang R J, Zhao Y. Journal of the Ceramic Society of Japan, 2017, 125(1), 36.
10 Chen J X, Deng X H, Luo Y B, et al. Construction and Building Mate-rials, 2015, 83, 275.
11 Peng H, Ge Y P, Cai C S, et al. Construction and Building Materials, 2019, 194, 102.
12 Stelzner L, Powierza B, Oesch T, et al. Construction and Building Materials, 2019, 224, 600.
13 Wang X X, Shen X D, Wang H L, et al. Journal of the Ceramic Society of Japan, 2015, 123 (1), 43.
14 Qiao H X, Peng K, Chen K F, et al. Materials Reports B:Research Papers, 2020, 34(5), 10035(in Chinese).
乔宏霞, 彭宽, 陈克凡, 等. 材料导报:研究篇, 2020, 34(5), 10035.
15 Zhou K P, Li J L, Xu Y J, et al. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(4), 731(in Chinese).
周科平, 李杰林, 许玉娟, 等. 岩石力学与工程学报, 2012, 31(4), 731.
16 GB/T50082-2009, Standard for text methods of long-term performance and durability of ordinary concrete, China Architecture ＆ Building Press, China, 2009(in Chinese).
GB/T50082-2009, 普通混凝土长期性能和耐久性能试验方法标准, 中国建筑工业出版社, 2009.
17 GB/T50081-2002, Standard for text methods of mechanical performance of ordinary concrete, China Architecture ＆ Building Press, China, 2002(in Chinese).
GB/T50081-2002, 普通混凝土力学性能试验方法标准, 中国建筑工业出版社, 2002.
18 Jensen O M, Hansen P F. Cement and Concrete Research, 2001, 31(4), 647.
19 Jensen O M, Hansen P F. Cement and Concrete Research, 2002, 32 (6), 973.
20 Yildirim S T, Meyer C, Herfellner S. Construction and Building Mate-rials, 2015, 91, 288.