Draining Concrete - Controlled Permeability Formwork

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Draining Concrete - Controlled Permeability Formwork

Author(s):

Publication: CIA

Volume:

Issue:

Appears on pages(s):

Keywords:

Date: 2/13/2011

Abstract:
Deterioration of reinforced concrete structures is a major problem worldwide. The durability of concrete structures, to a large extent, depends on the quality of the concrete cover; its ability to resist aggressive elements penetrating the concrete cover, attacking the reinforcement and damaging the concrete structure. Controlled Permeability Formwork (CPF) liner is tensioned and fixed to the formwork. The nonwoven CPF liner drains surplus water and air from the surface of freshly placed concrete. When water is drained off the surface, the water/cement ratio (w/ c) in the concrete surface is reduced which improves the strength and durability of the concrete dramatically. In short: you treat the problem, and not the symptoms. This paper will focus on the improvement of the concrete, based on independent laboratory results. A comparison of nonwoven CPF liner as opposed to ordinary formwork will be presented. Furthermore the change of w/c-ratio throughout the depth of the concrete will be presented.


Concrete Institute of Australia, International Partner Access.

View Resource »