Citric Acid Effect in High early Type Portland Cement Pastes and Mortars

Abstract:

The influence of citric acid in the properties of high strength Portland cement pastes and mortars, both in fresh and hardened condition, was evaluated. The content of citric acid varied from 0 to 0.8 wt%. Tests were carried out in cement pastes to determine the water required for normal consistency and initial and final setting times. Mortars cements were tested to define bulk density, consistency index, air content in the fresh condition and compressive strength after 7, 14, and 28 days. Analysis by XRD was also performed. The results showed that the use of citric acid as a retardant additive is a viable procedure, because it increased the mechanical strength after 14 days and improved the mortar workability.

• Periodical: Materials Science Forum (Volume 1012)
• Pages: 284-288
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1012.284
• Online since: October 2020
• Authors: Beatryz Cardoso Mendes, Rita de Cássia Silva Sant’Ana Alvarenga, Délio Porto Fassoni, Leonardo Gonçalves Pedroti, Afonso Rangel Garcez de Azevedo, Ana Beatriz Porto, Sergio Neves Monteiro, Fernanda Santos da Luz
• Keywords: Cement, Citric Acid, Retardant Additive

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