Enhancing the aluminate reaction during OPC hydration by combining increased sulfate content, triethanolamine and tartaric acid

Kirchberger I, Götz-Neunhoeffer F, Neubauer J (2023)


Publication Type: Journal article

Publication year: 2023

Journal

Book Volume: 170

Article Number: 107188

DOI: 10.1016/j.cemconres.2023.107188

Abstract

Possibilities for enhancing the aluminate reaction were studied in a mix of OPC blended with 7.9 % hemihydrate (HH) or 7.4 % anhydrite (AH) in combination with different triethanolamine (TEA) dosages. Heat flow calorimetry and quantitative X-ray diffraction (XRD) were performed to study the hydration process. Using anhydrite as an additional sulfate carrier allowed a lower TEA dosage compared to hemihydrate systems to enhance the degree of hydration of C3A. High TEA dosages in hemihydrate systems were found to hinder C3S hydration. Nevertheless, it was possible to push the aluminate reaction ahead of the silicate reaction, thereby enhancing the degree of hydration of C3A. Additionally, the degree of hydration of C3S was not strongly affected when anhydrite and a well-balanced TEA dosage were used. The addition of tartaric acid to OPC-anhydrite-TEA systems retarded the subsequent aluminate reaction.

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How to cite

APA:

Kirchberger, I., Götz-Neunhoeffer, F., & Neubauer, J. (2023). Enhancing the aluminate reaction during OPC hydration by combining increased sulfate content, triethanolamine and tartaric acid. Cement and Concrete Research, 170. https://dx.doi.org/10.1016/j.cemconres.2023.107188

MLA:

Kirchberger, Irina, Friedlinde Götz-Neunhoeffer, and Jürgen Neubauer. "Enhancing the aluminate reaction during OPC hydration by combining increased sulfate content, triethanolamine and tartaric acid." Cement and Concrete Research 170 (2023).

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