Development of Hydrophobic Concrete by Adding Dual-Crystalline Admixture at Mixing Stage

Abstract

A novel approach has been presented to add a dual‐crystalline hydrophobic admixture in fresh concrete for improving hydrophobicity against chloride and harmful chemicals. Dual‐crystalline material can utilize water of the fresh concrete to form crystals, but the challenge is to maintain adequate hydration and strength while improving hydrophobicity. This study presents the results from a comprehensive laboratory investigation on the application of 1, 2 and 8% of crystallizing aqueous and cementitious hydrophobic mineral in fresh concrete. Despite the high slump in the fresh mixture, no segregation was observed in the matured concrete. There was a marginal reduction of strength when a high percentage of admixture was used. Despite this, significant reduction of water absorption was observed indicating greater hydrophobicity. The optimum performance was found in mixtures with 2% admixture. Mixture with 2% aqueous hydrophobic admixture revealed marginal strength gain compared to 2% crystalline cementitious hydrophobic admixture, although water protection appears to be better in cementitious mixture.

Publication DOI: https://doi.org/10.1002/suco.201700254
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Engineering Systems and Supply Chain Management
Additional Information: © 2018 The Authors. Structural Concrete published by John Wiley & Sons Ltd on behalf of fib . International Federation for Structural Concrete This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Publication ISSN: 1751-7648
Last Modified: 01 Nov 2024 08:20
Date Deposited: 31 Jul 2020 07:13
Full Text Link:
Related URLs: https://onlinel ... /suco.201700254 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-10-01
Published Online Date: 2018-03-23
Accepted Date: 2018-02-25
Authors: Mazen, Al-Kheetan
Rahman, Mujib (ORCID Profile 0000-0002-5177-4159)
Chamberlain, Denis

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