Chemical, microbiological, and in situ test methods for biogenic sulfuric acid corrosion of concrete

Monteny, Joke; Vincke, E; Beeldens, Anne; Belie, Nele De; Taerwe, Luc; Gemert, Dionys Van; Verstraete, Willy

doi:10.1016/s0008-8846(00)00219-2

Cited by 298 publications

(157 citation statements)

References 14 publications

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“…El cambio del pH en la superficie está directamente relacionado con la pérdida de iones Ca2+, esto es atribuible no solo a la lixiviación del Ca2+ sino también a la formación de carbonatos de calcio, oxalatos y citratos de calcio según lo informado por diferentes autores (Monteny et al, 2000;Bertron, Duchesne, & Escadeillas, 2005).…”

Section: Discusión De Resultadosunclassified

“…Un posible escenario se daría tras finalizar la fase de establecimiento coralino; el deterioro se estabilizaría debido a la abundancia de organismos que cubrirían el área expuesta susceptible de ser colonizada, lo que a su vez protegería la estructura e impediría el avance del biodeterioro, sumado a esto la formación y precipitación de nuevas fases más estables podrían evitar dicho fenómeno, ya que la formación de citratos, oxalatos de calcio, yeso, etringita entre otros se dan debido a que el material requiere regresar a su estado más estable o de mínima energía, lo que podría aportar al sellado de la estructura [34].…”

Section: Discusión De Resultadosunclassified

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Biological and physicochemical evaluation of mortar as substrate for manufacturing artificial reef

et al. 2016

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Due to several deterioration of coral reefs around the world, has increased the need to rehabilitate marine environments. Artificial reefs have been proposed as a tool for conservation of these ecosystems. As part of an initiative to develop modules forming artificial reefs made of ecological concrete for the conservation of the biodiversity in the Colombian Caribbean; this work constitutes a starting point. During eleven months two trapezoidal plates were submerged near to Isla Palma, Colombian Caribbean; plates were fabricated in concrete with portland cement and the aggregates were replaced by ceramic waste. After biological and physicochemical evaluations of the material exposed to marine environment was concluded that this is a favorable substrate for the coral reefs, and the plates were colonized by more than 30% of its surface by marine organisms, their structure found internally stable, and there were no adverse effects on marine biota near the test site.Keywords: Ecological mortars; artificial reefs; waste resource; use of waste; conservation.Evaluación biológica y fisicoquímica de un mortero como sustrato para la fabricación de arrecifes artificiales Resumen Debido al deterioro de los arrecifes de coral en todo el mundo ha aumentado la necesidad de rehabilitar los entornos marinos. Los arrecifes artificiales se han propuesto como una herramienta para la conservación de estos ecosistemas. Durante once meses se sumergieron dos placas en forma trapezoidal, en Bajo Grande (Isla Palma), Caribe Colombiano. Esto se realizó como parte de una iniciativa para desarrollar módulos formadores de arrecifes artificiales. Se fabricó un mortero ecológico donde se reemplaza el uso de agregados naturales por residuos cerámicos. Las placas expuestas al medio marino fueron colonizadas por organismos en un 30% de su superficie aproximadamente, la estructura interna de las muestras se mantuvo estable y no se apreciaron efectos adversos sobre la biota marina cercana al lugar de prueba. Después de hacer evaluaciones biológicas y fisicoquímicas del material expuesto se concluyó que éste constituye un sustrato favorable para el desarrollo de los arrecifes artificiales.

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Section: Discusión De Resultadosunclassified

Biological and physicochemical evaluation of mortar as substrate for manufacturing artificial reef

et al. 2016

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“…The concentration of both acids correspond to the product of metabolism of bacteria Acidithiobacillus thiooxidans, Thiobacillus denitrificans and Paracoccus denitrificans, which according to the literature is about 0.15 mmol/dm 3 [15]. Continuous solution flow through the samples was maintained, while keeping practically the constant acid concentration.…”

Section: Methodsmentioning

confidence: 99%

Biological and chemical corrosion of cement materials modified with polymer

Stanaszek-Tomal¹,

Fiertak²

2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The article presents the effect of the addition of polymer to mortars with CEMI and its influence on durability under conditions of sulfuric acid or nitric and sulphur bacteria or nitrogen (nitrification and denitrification). Both acids corresponds to the products of metabolism of bacteria Acidithiobacillus thiooxidans and Thiobacillus denitrificans, Paracoccus denitrificans by the literature is about 0.15 mmol/dm 3 . The changes in tightness materials studied by determining moisture mass and absorption. Corrosion processes were identified by examination in a scanning microscope equipped with an X-ray microanalyzer and a mercury porosimeter. The research results presented showed that the solution has a significantly weaker effect on the composite cement and cement-polymer compared with the action of bacteria. The action of both environments caused two opposing processes: unsealing the structure and deposition of corrosion products.

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“…These results generally display decreasing weights for all specimens as function of time. This weight loss is attributable to the lixiviation of binder's hydration products as function of acid exposure period [38] [39]. The analysis of the results shows that at the first and third day of acid attack, the reference mortar without MK displays higher weight losses with reference to the MK containing mortars.…”

Section: Ultrasonic Pulse Dynamic Young Modulusmentioning

confidence: 99%

The Influence of Metakaolin from Saaba (Burkina Faso) over Physico-Mechanical and Durability Properties of Mortars

Ntimugura¹,

Sore²,

Bello³

et al. 2017

OJCE

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The paper evaluates the feasibility of reducing clinker in the Portland Cement production using local metakaolin in Burkina Faso. Standardized testing methods have been used for this purpose, and experiments were performed on mortar prisms containing different amounts of metakaolin. Important results about the physical, mechanical and durability characterization of blended mortars were carried out in this study. The obtained results are discussed based on available literature data. These results have shown increased physical and durability properties for blended mortars. Although the mechanical strengths remained relatively low for higher MK incorporations, the latter grow to surpass these of PC mortars (the reference) at 28, 56 and 90 days of curing. The results in the paper, have confirmed the possibility of using metakaolin to partially substitute cement, a possibility to reduce the CO2 production by the cement industry in Burkina Faso.

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Chemical, microbiological, and in situ test methods for biogenic sulfuric acid corrosion of concrete

Cited by 298 publications

References 14 publications

Biological and physicochemical evaluation of mortar as substrate for manufacturing artificial reef

Biological and physicochemical evaluation of mortar as substrate for manufacturing artificial reef

Biological and chemical corrosion of cement materials modified with polymer

The Influence of Metakaolin from Saaba (Burkina Faso) over Physico-Mechanical and Durability Properties of Mortars

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