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Polypropylene Fibre Reinforced Concrete Air Permeability

Published online by Cambridge University Press:  16 February 2011

Miguel A. Sanjuan ,
A. Moragues ,
B. Bacle  and
C. Andrade
Miguel A. Sanjuan
Affiliation:
Institute of Construction Sciences “Eduardo Torroja”, C/ Serrano Galvache s/n, 28033 Madrid, Spain.
A. Moragues
Affiliation:
Institute of Construction Sciences “Eduardo Torroja”, C/ Serrano Galvache s/n, 28033 Madrid, Spain.
B. Bacle
Affiliation:
Institute of Construction Sciences “Eduardo Torroja”, C/ Serrano Galvache s/n, 28033 Madrid, Spain.
C. Andrade
Affiliation:
Institute of Construction Sciences “Eduardo Torroja”, C/ Serrano Galvache s/n, 28033 Madrid, Spain.
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Abstract

The permeability of concrete to gases is of direct importance to the durability of concrete structures, because of carbon dioxide flowing through the concrete favour lime carbonation and reinforcing steel corrosion.

Mortar with and without polypropylene fibres having water/cementitious ratios of 0.30, 0.35 and 0.40 and a cement/sand ratio of 1/1 were studied. Polypropylene dosage varied from 0.1 to 0.3% by volume of cement.

The characterization of mortar permeability was made using cylindrical shaped samples (3 cm height and 15 cm diameter). These specimens were 28 days cured and then dried before the test.

The addition of fibres results in a decrease of air permeability. Variation of the water/cement ratio is of lesser importance than fiber addition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 211: Symposium O – Fiber-Reinforced Cementitious Materials , 1990 , 71
Copyright
Copyright © Materials Research Society 1991

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