Research on Chloride Resistance of Recycled Concrete Based on Random Polygonal Aggregate

Research on Chloride Resistance of Recycled Concrete Based on Random Polygonal Aggregate

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Ze-liang YAO^a^,^b, Tian-jing LINGHU^a^,^b, Ya-lun QI^a^,^b, Fa-ning DANG^a^,^b, Ting-ting CUI^a^,^b

Water Resources and Power | 2023, 41(4) : 163 - 166

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Water Resources and Power | 2023, 41(4): 163-166

• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •

Research on Chloride Resistance of Recycled Concrete Based on Random Polygonal Aggregate

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Ze-liang YAO^a^,^b, Tian-jing LINGHU^a^,^b, Ya-lun QI^a^,^b, Fa-ning DANG^a^,^b, Ting-ting CUI^a^,^b

Affiliations

^a.School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China

^b.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China

Published: 2023-04-25 doi: 10.20040/j.cnki.1000-7709.2023.20220668

Outline

Abstract

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Based on the chloride ion diffusion model and aggregate gradation theory, the mesoscopic model of recycled concrete random polygonal aggregate was constructed using PYTHON and COMSOL. The validity of the model was verified by the existing experimental results. The calculation and analysis of the chloride ion erosion resistance of recycled concrete under different working conditions such as the diffusivity of new and old mortar, the thickness of old mortar and the replacement ratio of recycled aggregate was carried out. And then the diffusion law of chloride ion in recycled concrete and the influence law of critical factors on the chloride ion erosion resistance were studied. The results show that the simulation results are close to the experimental values, and the method can better simulate the diffusion of chloride ions in recycled concrete. The relationship curve between chloride concentration and depth shows discontinuous characteristics. With the increase of diffusion coefficient of new and old mortar, the chloride ion content increases gradually. The chloride ion erosion resistance of recycled concrete decreases with the increase of the thickness of old mortar and the replacement ratio of recycled aggregate.

Key words

recycled aggregate concrete / random aggregate / chloride ion model / diffusion characteristics / numerical simulation

Cite this Article

Ze-liang YAO, Tian-jing LINGHU, Ya-lun QI, Fa-ning DANG, Ting-ting CUI. Research on Chloride Resistance of Recycled Concrete Based on Random Polygonal Aggregate[J]. Water Resources and Power, 2023 , 41 (4) : 163 -166 . DOI: 10.20040/j.cnki.1000-7709.2023.20220668

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Year 2023 volume 41 Issue 4

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Article Info

doi: 10.20040/j.cnki.1000-7709.2023.20220668

Receive Date：2022-04-06
Online Date：2026-01-27
Published：2023-04-25

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History

Received：2022-04-06
Revised：2022-07-04

Funding

Affiliations

^a.School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China

^b.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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