Attack of Cementitious Materials by Organic Acids in Agricultural and Agrofood Effluents

Bertron, Alexandra; Duchesne, Josée

doi:10.1007/978-94-007-5413-3_6

Cited by 25 publications

(82 citation statements)

References 66 publications

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“…Experimental campaigns have pointed out that these acids differ greatly in their aggressiveness toward the cement matrix in terms of alteration kinetics, evaluated through altered layer thicknesses and mass changes [3,13,17]. A summary of the main alteration phenomena observed experimentally on cement matrices exposed to these organic acids (acetic, succinic, citric, and oxalic acids) alone or in mixtures are provided in Table 1.…”

Section: Thermodynamic Datamentioning

confidence: 99%

“…Also, even though it is suspected, no real evidence of the role of polyacidity (e.g. citric and succinic acids) on the aggressiveness of the acid has been found so far [3,15,18]. Calcium is generally considered when studying the acid-cement interactions but the stability of aluminium should also be better investigated since most binders renowned as more stable than Portland cement in acidic environments are aluminium-rich materials (cement with slag, metakaolin-bearing binders, calcium aluminate cements).…”

Section: Introductionmentioning

confidence: 99%

“…The waste waters contain a wide range of short-chain organic acids (acetic, lactic, tartaric, oxalic, succinic, etc. [3]), mostly coming from the microbial activity naturally occurring in such media. Very different types of structures can be degraded (storage silos, cowsheds, milking rooms, collecting systems, biogas silos…), sometimes with very high kinetics [2].…”

Section: Introductionmentioning

confidence: 99%

“…The physicochemical mechanisms of such acid attack have already been investigated, mostly experimentally. Two groups of acids have been identified: (i) acids with soluble salts, such as acetic, butyric, lactic or propionic acids and (ii) acids with slightly soluble to insoluble salts, including malic, oxalic, succinic and tartaric acids [3], [15]. For the first group, alteration mechanisms appear similar to those observed with strong acids such as nitric or hydrochloric acids [3,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…Two groups of acids have been identified: (i) acids with soluble salts, such as acetic, butyric, lactic or propionic acids and (ii) acids with slightly soluble to insoluble salts, including malic, oxalic, succinic and tartaric acids [3], [15]. For the first group, alteration mechanisms appear similar to those observed with strong acids such as nitric or hydrochloric acids [3,16,17]. For the second group, the physical and chemical properties of the acid salts (solubility, molar volume, affinity of salt for the cement matrix) seemed to influence the intensity of alteration and a correlation was observed between the molar volumes of the salts and the intensity of alteration of the matrix [18].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Interactions between hydrated cement paste and organic acids: Thermodynamic data and speciation modeling

Windt

Bertron

Larreur-Cayol

et al. 2015

Cement and Concrete Research

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Abstract.Interactions of short-chain organic acids with hydrated cement phases affect structure durability in the agro-food and nuclear waste industries but can also be used to modify cement properties. Most previous studies have been experimental, performed at fixed concentrations and pH, without quantitatively discriminating among polyacidity effects, or complexation and salt precipitation processes. This paper addresses such issues by thermodynamic equilibrium calculations for acetic, citric, oxalic, succinic acids and a simplified hydrated CEM-I. The thermodynamic constants collected from the literature allow the speciation to be modelled over a wide range of pH and concentrations. Citric and oxalic had a stronger chelating effect than acetic acid, while succinic acid was intermediate. Similarly, Ca-citrate and Ca-oxalate salts were more insoluble than Ca-acetate and Ca-succinate salts. Regarding aluminium complexation, hydroxyls, sulphates, and acid competition was highlighted. The exploration of acid mixtures showed the preponderant effect of oxalate and citrate over acetate and succinate.

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Section: Thermodynamic Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interactions between hydrated cement paste and organic acids: Thermodynamic data and speciation modeling

Windt

Bertron

Larreur-Cayol

et al. 2015

Cement and Concrete Research

Self Cite

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Effect of sewage on compressive strength and geometric texture of the surface of concrete elements

Witkowska-Dobrev

Szlachetka

Malarski

et al. 2022

Structural Concrete

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This paper presents the results of a study on the compressive strength, weight loss, surface roughness, elemental analysis and ultrasonic pulse velocity (UPV) measurement after 270 days of seasoning concrete cubes measuring 100 Â 100 Â 100 mm in solutions of sewage from the post-grit chamber as well as sewage from the activated sludge chamber in three different environments, that is, acidic, neutral, and alkaline. The value of the compressive strength of the samples stored in the tested environments varied depending on the type of the tested wastewater and its pH in relation to the control sample. The most influence on compressive strength was acidic environment-the decrease was approximately 12.7% in the post-grit chamber and 9.5% in the activated sludge chamber. Samples which had been seasoned in the post-grid chamber were characterized by UPVs ranging from 4805.3 to 4864.6 m/s. Samples seasoned in an activated sludge chamber achieved UPVs ranging from 4689.7 to 4778.9 m/s. The average relative error between the compressive strength values calculated from the ultrasonic method according formula (3) and the measured values does not exceed 4%. The conclusions from the 3D measurements of roughnesses show that parameters Ra, Rz, Sa, and Sq are the most reliable in assessing the roughness intensity of corrosion damage of concrete caused by sewage. Elemental analysis proved that in the acidic pH solution of sewage from the post-grit chamber, the presence of calcium was not identified at any of the points tested.biological corrosion, concrete elements, environmental protection, roughness analysis, wastewater | INTRODUCTIONMunicipal sewage has a destructive impact on the concrete surface. Determining the aggressiveness of wastewater has an impact on the appropriate design of concrete structures in the water and wastewater management.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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Attack of Cementitious Materials by Organic Acids in Agricultural and Agrofood Effluents

Cited by 25 publications

References 66 publications

Interactions between hydrated cement paste and organic acids: Thermodynamic data and speciation modeling

Interactions between hydrated cement paste and organic acids: Thermodynamic data and speciation modeling

Effect of sewage on compressive strength and geometric texture of the surface of concrete elements

Leaching of Cementitious Materials by Pure Water and Strong Acids (HCl and HNO3)

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