Contribution of construction activity to aggressive ground conditions causing the thaumasite form of sulfate attack to concrete in pyritic ground

Longworth, T. I.

doi:10.1016/s0958-9465(03)00124-0

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…Research has also identified ironoxidising bacteria, such as Thiobacillus ferrooxidans, as being involved in the production of sulfuric acid in pyritic ground and in sewage treatment plants [35,36].…”

Section: Thiooxidans T Intermedius T Perometabolis T Novellus mentioning

confidence: 99%

Biochemical attack on concrete in wastewater applications: A state of the art review

O’Connell

McNally

Richardson

2010

Cement and Concrete Composites

221

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Publication informationCement and Concrete Composites, 32 (7) AbstractThe costs associated with the provision and maintenance of drinking water and wastewater infrastructure represents a significant financial demand worldwide. Maintenance costs are disproportionately high, indicating a lack of adequate durability. There remains a lack of consensus on degradation mechanisms, the performance of various cement types, the role of bacteria in the corrosion process associated with wastewater applications and testing methodologies. This paper presents a review of the literature, outlining the various research approaches undertaken in an effort to address this problem. The findings of these varying approaches are compared, and the different strategies employed are compiled and discussed. It is proposed that a key step in advancing the understanding of the associated deterioration mechanism is a combined approach that considers the interaction between biological and chemical processes. If this can be achieved then steps can be taken to establishing a performance-based approach for specifying concrete in these harsh service conditions.

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Section: Thiooxidans T Intermedius T Perometabolis T Novellus mentioning

confidence: 99%

Biochemical attack on concrete in wastewater applications: A state of the art review

O’Connell

McNally

Richardson

2010

Cement and Concrete Composites

221

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“…In den vergangenen Jahren erschienen gehäuft Berichte über Schäden an Betonbauteilen, die im Kontakt zu pyrithaltigem Baugrund standen [1], [2], [3]. Dieses bereits lange bekannte und vielfach dokumentierte Problem tritt als Folge der Oxidation des Pyrits (FeS 2 ) durch Belüftung des Untergrunds und der damit einhergehenden Freisetzung von Sulfat und Säure auf.…”

Section: Einführungunclassified

Das Angriffspotential sulfatsaurer Böden in Norddeutschland

Gröger

Hamer

Schulz

2008

Beton und Stahlbetonbau

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In Norddeutschland treten verbreitet Moor‐ und Marschböden mit hohen Pyritgehalten auf, die bei der Oxidation große Mengen an Säure und Sulfat freisetzen können. Diese relativ jungen Bildungen (< 10.000 Jahre) werden als potentiell sulfatsaure Böden bezeichnet. Diese Böden stellen ein bedeutendes Gefährdungspotential für Betonbauteile dar, die im Kontakt zu diesen Böden stehen und finden in bisherigen Regelungen nur wenig Beachtung. Die Verbreitung ist häufig fleckenhaft und nicht an Gesteinsformationen gebunden, was die Identifizierung und Kartierung dieser Böden erschwert. Die oft niedrige Säureneutralisationskapazität der Böden bei gleichzeitig hohen Pyritgehalten führt bei der Oxidation zu einem kombinierten Säure‐ und Sulfatangriff auf in den Boden eingebrachte Betonteile.

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“…The low pH/high sulphate drainage mentioned above, often referred to as acid rock drainage due to the oxidation of sulphide minerals, has gained attention in the past decades due to its potential impact on engineering structures and the environment [3][4][5]11]. The processes involved in the pyrite oxidation have been highly concerning as they lead to a number of engineering problems for the pyritic rocks, such as expansion, shear strength reduction, and acid corrosion [12].…”

Section: Introductionmentioning

confidence: 99%

“…The acidic water can have a strongly negative impact on the physical and mechanical properties of the surrounding rock masses (e.g., limestone and dolomite) or concrete structures (such as abutment) [2][3][4][5]. External sulphate attack on the concrete leads to the formation of gypsum, ettringite, and/or thaumasite, resulting in cracking, spalling, softening, expansion, loss of strength, and other forms of damage [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Rodrigues et al [6] conducted mineralogical and chemical assessments of concrete damaged due to the oxidation of sulphide-bearing aggregates.…”

Section: Introductionmentioning

confidence: 99%

Deterioration and Oxidation Characteristics of Black Shale under Immersion and Its Impact on the Strength of Concrete

et al. 2020

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Black shale, which usually contains pyrite, is easily oxidized and generates acid discharge. This acidic environment is not favorable for concrete in engineering applications and is likely to affect the durability of engineering structures. This study investigated the effect of acid discharge from the weathering of black shale on the strength of concrete under partially immersed conditions. Black shale concrete immersion tests were conducted at different immersion depths to evaluate the oxidation conduction of black shale. Water chemistry and oxidation products were monitored during and after the immersion tests. The quality and strength of the black shale and concrete specimens were obtained before and after the immersion by testing the ultrasonic wave velocity and uniaxial compressive strength. The results indicated that a lower immersion depth of black shale reveals a higher degree of oxidation, and the capillary zone in black shale is critical for black shale oxidation in terms of mass transfer. The ultrasonic velocity of the concrete showed different change patterns in the immersed and non-immersed zones. Precipitation and additional hydration enhanced the quality and entirety of the concrete (increased ultrasonic velocity) at the non-immersed or partially-immersed zones, while the dissolution of concrete was dominant in the immersed zone (decreased ultrasonic velocity) and induced a reduction of concrete quality. The compressive strength of the concrete was enhanced after immersion. The concrete strength slightly increased by 5–15%. This phenomenon is attributed to the filling of the voids by the precipitations of minerals, such as goethite and anhydrite.

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Contribution of construction activity to aggressive ground conditions causing the thaumasite form of sulfate attack to concrete in pyritic ground

Cited by 12 publications

References 8 publications

Biochemical attack on concrete in wastewater applications: A state of the art review

Biochemical attack on concrete in wastewater applications: A state of the art review

Das Angriffspotential sulfatsaurer Böden in Norddeutschland

Deterioration and Oxidation Characteristics of Black Shale under Immersion and Its Impact on the Strength of Concrete

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