Effects of Water-Cement Ratio on Concrete Sulfate Corrosion Rate

Du, Jian Min; Han, Xiao Li; Li, Zai Ting; Li, Guo; Ji, Yongsheng

doi:10.4028/www.scientific.net/kem.711.295

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…14 Concrete with a lower w/c ratio always corresponds to a smaller corrosion layer thickness. 15 The smaller the water-binder ratio, the higher the strength and the better the corrosion. 16 Some scholars have carried out research on mechanism and calculation model.…”

Section: Introductionmentioning

confidence: 99%

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Influence mechanisms under different immersion methods and different strengths of concrete in corrosive environments, and verification via long‐term field test

Zhang

Liu

et al. 2020

Structural Concrete

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This paper is to study the influence of sulphate corrosion on the mechanical behaviors of concrete, especially concrete corrosion under actual corrosion environment. This study investigated different immersion methods for concrete in a corrosion environment, and different strengths of concrete specimens with contents of sodium sulphate and magnesium chloride of 10.36% and 12.00%, respectively. Strength tests were performed on the specimens for the different immersion methods of full immersion, half-immersion, and dry-wet cycles, and with different strengths for the concrete of C20, C35, and C50. To study the internal mechanisms of the corrosion of concrete with different immersion methods and different strengths, a microscopic pore structure test was conducted. The field tests were performed after 12 years to evaluate the long term performance of the concrete under the actual environmental conditions. The test results show that full immersion mainly led to chemical corrosion, half immersion led to double damage from salt crystallization and chemical corrosion, and dry-wet cycles accelerated the corrosions of the salt crystallization and chemical corrosion. The higher the strength of concrete, the better its resistance to the sulphate corrosion. In comparison with the strength of the concrete before corrosion, field test results show that the strength of uncorroded concrete after 12 years is increased by 9.5% and the strength of corroded concrete after 12 years is reduced by 56.2%. The results of the strength tests and pore structure tests show that sulphate has a significant impact on concrete strength after 12 years of field tests. This study will contribute to improve long-term performance of the concrete, provide guidance for concrete Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

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Section: Introductionmentioning

confidence: 99%

“…The larger the concrete cover depth, the more serious the reinforcement corrosion for exposed rebar in magnesium oxychloride cement concrete 14 . Concrete with a lower w/c ratio always corresponds to a smaller corrosion layer thickness 15 . The smaller the water–binder ratio, the higher the strength and the better the corrosion 16 .…”

Section: Introductionmentioning

confidence: 99%

Influence mechanisms under different immersion methods and different strengths of concrete in corrosive environments, and verification via long‐term field test

Zhang

Liu

et al. 2020

Structural Concrete

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An inhibitory prospect of leaf extracts of flossflower and yam for rebar steel corrosion in concrete aggregates

Pandey,

Gupta,

Gautam

et al. 2024

E3S Web of Conf.

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Concrete infrastructures with embedded mild steel (EMS) have been implemented in various construction sectors to enhance their strength and durability. However, deleterious corrosion of the EMS in CA is a burdensome problem worldwide. Therefore, timely application of appropriate corrosion control techniques can mitigate the consequential effects of premature corrosion of such EMS in CA. Green plant-based leaf extracts have been recently utilized as anti-corrosive agents to prevent premature EMS corrosion. The present work focused on exploring the inhibitory impacts of leaf extracts of floss flower or Ageratum houstonianum (AgHE) and yam or Dioscorea alata (DiAE) each for controlling the rusting of the EMS in concrete beam (CB). The DiAE and AgHE comprise secondary metabolites like phenols, alkaloids, saponins, steroids, tannins, and flavonoids, confirmed from screening, GC-MS, and FTIR analysis. The EMS in CB with 1000-4000 ppm DiAE or AgHE showed a better corrosion inhibiting effect, compared with a concentration of 500 ppm from the observation of electrochemical corrosion potential (ECoP) value, measured using half-cell potential (HCP) method according to the ASTM C876-91 standard. The recent outcomes could be a part of an innovative solution to extend the lifespan of EMS in CB.

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Concrete sulfate corrosion coupled with hydraulic pressure

2019

Marine Georesources & Geotechnology

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Effects of Water-Cement Ratio on Concrete Sulfate Corrosion Rate

Cited by 4 publications

References 7 publications

Influence mechanisms under different immersion methods and different strengths of concrete in corrosive environments, and verification via long‐term field test

Influence mechanisms under different immersion methods and different strengths of concrete in corrosive environments, and verification via long‐term field test

An inhibitory prospect of leaf extracts of flossflower and yam for rebar steel corrosion in concrete aggregates

Concrete sulfate corrosion coupled with hydraulic pressure

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