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Strength and durability performance of concrete cast using permeable formwork liner

Strength and durability performance of concrete cast using permeable formwork liner The controlled permeable formwork (CPF) liner is a novel way to improving the quality of cover zone of concrete. This technique is used to remove excess water and trapped air from the near surface of fresh concrete while retaining small particles such as cement and other fine particles. As a result, the concrete’s surface zone has a lower water-to-cement ratio, lower surface porosity and more cement content. This study looked at the effect of CPF liner on concrete’s strength, durability and chemical resistance. Three different water-to-cement ratios (0.48, 0.41, and 0.31) were used to cast concrete samples against a CPF liner and an impermeable formwork (IMF). At various ages, the compressive strength, water absorption, sorptivity, hydrochloric acid and sulphate resistance tests were performed. The findings revealed that CPF concretes had an excellent resistance to water absorption and sorptivity by 15–30% and 32–67% respectively. The residual compressive strength of CPF concrete was more by 9–144% compared to IMF concretes under hydrochloric acid environment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

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References (40)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00231-9
Publisher site
See Article on Publisher Site

Abstract

The controlled permeable formwork (CPF) liner is a novel way to improving the quality of cover zone of concrete. This technique is used to remove excess water and trapped air from the near surface of fresh concrete while retaining small particles such as cement and other fine particles. As a result, the concrete’s surface zone has a lower water-to-cement ratio, lower surface porosity and more cement content. This study looked at the effect of CPF liner on concrete’s strength, durability and chemical resistance. Three different water-to-cement ratios (0.48, 0.41, and 0.31) were used to cast concrete samples against a CPF liner and an impermeable formwork (IMF). At various ages, the compressive strength, water absorption, sorptivity, hydrochloric acid and sulphate resistance tests were performed. The findings revealed that CPF concretes had an excellent resistance to water absorption and sorptivity by 15–30% and 32–67% respectively. The residual compressive strength of CPF concrete was more by 9–144% compared to IMF concretes under hydrochloric acid environment.

Journal

Journal of Building Pathology and RehabilitationSpringer Journals

Published: Dec 1, 2022

Keywords: Strength property; Hydrochloric acid resistance; Controlled permeable formwork; Sorptivity; Water absorption; Sulfate resistance

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