Development of two analytical methods for determination of water-soluble chlorides and sulfates in the conservation of concrete heritage buildings

• Autorzy: Oroza A. H. , Pimentel F. R. , Parra E. P. , León L. N. D. , Amorós Y. G.
• Języki publikacji: EN

Abstrakty

EN

The corrosiveness and pollution of the atmosphere in the Old City of Havana – Cuba, have come to be over the last decades a growing concern regarding the durability and the aesthetics of heritage and historic concrete buildings. The chlorides and sulfates present in the air are capable to deposit over the concrete and have a direct impact on the deterioration of buildings. Chloride anions induce localized corrosion on the reinforced steel, while sulfates produce severe cracking in concrete. Based on Cuban climate parameters, it is important to develop an analytical method suitable to quantify the amount of these substances in the mass of concrete. The aim of this study was to develop two analytical procedures for the quantification of water-soluble chlorides and sulfates in hardened concrete in used buildings. Basic evaluation of the precision, accuracy and uncertainty of the proposed methods was done. In order to determine the content of water-soluble chlorides, mercury(II) nitrate was used as a titrant, and mix of bromophenol/diphenylcarbazone as an indicator. The sulfates content was determined gravimetrically. The study concluded that both methods, as well as the statistical analysis performed are satisfactory, allowing the quantification of the amount of water-soluble chlorides and sulfates in concrete heritage buildings.

Słowa kluczowe

EN

heritage buildings; water-soluble chlorides; sulfates; precision; accuracy; uncertainty

PL

budynki zabytkowe; chlorki rozpuszczalne w wodzie; siarczany; precyzja; niepewność

• Wydawca: Agord - Karol Brzeziński
• Czasopismo: Journal of Building Chemistry
• Rocznik: 2016
• Tom: Vol. 1, iss. 1
• Strony: 61--68
• Opis fizyczny: Bibliogr. 24 poz., tab.

Twórcy

autor

Oroza A. H.

• Projection, Architecture and City Planning RESTAURA, Cuba No. 316, La Habana 10100, Cuba

autor

Pimentel F. R.

• Laboratory of waters and wastewaters “José Isaac del Corral”, Extension of Vía Blanca Avenue, La Habana 11000, Cuba

autor

Parra E. P.

• Laboratory of waters and wastewaters “José Isaac del Corral”, Extension of Vía Blanca Avenue, La Habana 11000, Cuba

autor

León L. N. D.

• Laboratory of waters and wastewaters “José Isaac del Corral”, Extension of Vía Blanca Avenue, La Habana 11000, Cuba

autor

Amorós Y. G.

• Laboratory of waters and wastewaters “José Isaac del Corral”, Extension of Vía Blanca Avenue, La Habana 11000, Cuba

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