Hydration properties and acid corrosion resistance of alkali-activated aluminum sludge ash coating materials

YANG Jing; CHENG Cheng; REN Yujie; LIU Xingbang; ZHAO Yong; HUANG Yujie; LU Jinsuo

doi:10.13205/j.hjgc.202501021

Volume 43 Issue 1

Mar. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(1): 195-203

LIU Yuxin, ZENG Lingwu, FANG Zheng, SUN Dezhi. COMPREHENSIVE PERFORMANCE EVALUATION OF URBAN WASTEWATER TREATMENT PLANTS IN THE UPPER AND MIDDLE REACHES OF THE YELLOW RIVER BASIN[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 34-42. doi: 10.13205/j.hjgc.202412005

Citation:

YANG Jing, CHENG Cheng, REN Yujie, LIU Xingbang, ZHAO Yong, HUANG Yujie, LU Jinsuo. Hydration properties and acid corrosion resistance of alkali-activated aluminum sludge ash coating materials[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(1): 195-203. doi: 10.13205/j.hjgc.202501021

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Hydration properties and acid corrosion resistance of alkali-activated aluminum sludge ash coating materials

doi: 10.13205/j.hjgc.202501021

YANG Jing^1,2,3,
CHENG Cheng^1,2,
REN Yujie^1,2,
LIU Xingbang^1,2,
ZHAO Yong^1,2,
HUANG Yujie^1,2,
LU Jinsuo^{1,2,3
,
,}

1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
3. State Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received Date: 2023-12-20
Accepted Date: 2024-04-08
Rev Recd Date: 2024-03-12

Available Online: 2025-03-21

Publish Date: 2025-03-21

Abstract

Abstract

Aluminum sludge, a geopolymer with high aluminum content, can be used as a supplementary cementitious material to improve the corrosion resistance of concrete. In this study, the effects of two different alkali activators (NaOH and Na₂SiO₃) on the hydration process of cement-based coating materials under different dosages were investigated by using sludge pretreatment methods of low-temperature calcination combined with alkali activation, and the acid corrosion resistance of the coating was explored. The results showed that the substitution of aluminum sludge ash (ASA) at a low temperature of 350 ℃ with an alkali activator can promote the formation of calcium aluminate hydrate (C-A-H) and calcium aluminosilicate hydrate (C-A-S-H) gel products. The acid corrosion resistance of the coating material with the ratio of 6% Na₂SiO₃+10% ASA was better than that of ordinary Portland cement, and the coating material can form a layer of acid barrier, Al(OH)₃, in the middle stage of corrosion. This work provides a low-energy consumption treatment method for resource utilization of aluminum sludge, and the coating material can be applied in acid-corrosive environment
- alkali activation,
- aluminum sludge ash,
- coating material,
- hydration properties,
- acid corrosion resistance

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References

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