Degradation behavior of concrete under corrosive coal mine environment

Zhou, Shu-Chun; Lv, Henglin; Wu, Yuan-Zhou

doi:10.1016/j.ijmst.2018.12.001

Cited by 25 publications

(6 citation statements)

References 20 publications

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“…Existing studies [65][66][67][68][69] suggest that a corrosive environment could significantly reduce the durability of cracked concrete. However, corrosive ions can also react with cement to generate crystals that can partially heal cracks.…”

Section: Corrosive Environmentmentioning

confidence: 99%

Influence of Crystalline Admixtures and Their Synergetic Combinations with Other Constituents on Autonomous Healing in Cracked Concrete—A Review

2022

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Crystalline admixtures (CAs) are new materials for promoting self-healing in concrete materials to repair concrete cracks. They have been applied to tunnel, reservoir dam, road, and bridge projects. The fundamental research and development of CAs are needed concerning their practical engineering applications. This paper reviews the current research progress of commercial CAs, including self-made CA healing cracks; the composition of CA; healing reaction mechanism; the composition of healing products; distribution characteristics of healing products; the influence of service environment and crack characteristics on the healing performance of CA; and coupling healing performance of CA with fiber, expansive agent, and superabsorbent polymers. The current research findings are summarized, and future research recommendations are provided to promote the development of high-performance cement matrix composites.

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Section: Corrosive Environmentmentioning

confidence: 99%

Influence of Crystalline Admixtures and Their Synergetic Combinations with Other Constituents on Autonomous Healing in Cracked Concrete—A Review

2022

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“…Cement sheath of well Hydrochloric acid (HCl) and hydrofluoric acid (HF) HCl (0-15%)HF (0-3%) [27,[31][32][33][34] Coal mines Concrete supporting structures and bunkers Hydrochloric acid (HCl) 1-3 mg/m 3 [35,36] Acid rain Pavements, façades and other external elements of buildings, structures, infrastructure Sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) pH 3.5-4.8 [38][39][40]202] Manufacturing and processing (chemicals, fertilizers, ammonium nitrate and metal).…”

Section: Acid Attack In-service -Exposure Environments and Conditionsmentioning

confidence: 99%

Acid resistance of alkali-activated binders: A review of performance, mechanisms of deterioration and testing procedures

Aiken¹,

Kwasny³

et al. 2022

Construction and Building Materials

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“…e long-term coupling e ect of the high temperature and humidity conditions of the air shaft is the severe corrosion of the air shaft lining [1][2][3][4], thereby decreasing the concrete strength and the lining bearing capacity. us far, many researchers have studied the durability of concrete.…”

Section: -mentioning

confidence: 99%

“…e concrete strength grade and a number of the concrete specimens are listed in Table 1. According to the on-site environmental sampling and testing results, it is found that the internal environment of the air shaft includes CO 2 (2655.4-6910.5 ppm), HCl (22.6-63.9 mg/m 3 ), and SO 4 2-(1554.33-3390.80 mg/l), which have a certain impact on the concrete [1][2][3][4]18]. e natural environment of the air shaft was simulated in the test using the similarity theory based on the environmental characteristics of the air shaft.…”

Section: Experimental Programmentioning

confidence: 99%

Variation Pattern of the Stress‐Strain Curve of Concrete under Multifactor Coupling

Xie

2022

Advances in Civil Engineering

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The air shafts of coal mines contain solid, liquid, and gaseous substances that corrode concrete under conditions of relatively high temperature and humidity. The coupling of various factors decreases the concrete strength and thus the bearing capacity of the air shaft lining. In this study, concrete corrosion tests were carried out by simulating the complex environment of a coal mine air shaft lining to study the variation in the concrete stress-strain curve. For corroded concrete specimens subjected to very low stress, the microcracks and holes were closed, generating a large deformation, indicating severe concrete corrosion. The longer the corrosion time was, the gentler the initial slope of the curve. Finally, the uniaxial compression constitutive model of corroded concrete was established based on the Weibull distribution of three parameters, and the model curve was compared with the experimental curve. This model can not only predict the change of the stress-strain curve of high-strength concrete in a coal mine air shaft environment but also provide theoretical reference for the application of high-strength concrete in an air shaft environment.

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Degradation behavior of concrete under corrosive coal mine environment

Cited by 25 publications

References 20 publications

Influence of Crystalline Admixtures and Their Synergetic Combinations with Other Constituents on Autonomous Healing in Cracked Concrete—A Review

Influence of Crystalline Admixtures and Their Synergetic Combinations with Other Constituents on Autonomous Healing in Cracked Concrete—A Review

Acid resistance of alkali-activated binders: A review of performance, mechanisms of deterioration and testing procedures

Variation Pattern of the Stress‐Strain Curve of Concrete under Multifactor Coupling

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