STRENGTH AND PERMEABILITY RELATIONSHIP OF STEEL
35th Our World in Concrete and Structures (OWICs) - 2010
A P Singh*, B R Ambedkar National Institute of Technology, Jalnandhar, India
D Singhal, GZS College of Engineering & Technology, Bathinda, India
(Key words of the Paper)
An extensive laboratory investigation was undertaken to study the effects of fibre
parameters on the permeability and strength characteristics of steel fibre reinforced
concrete (SFRC). The results reported herein present the effect of varying fibre
content and curing age on the permeability and compressive and split tensile
strengths of SFRC. Crimped steel fibres having an aspect ratio of 65 were used in
varying weight fractions of 1.0%, 2.0% and 4.0% . Samples were tested for
permeability and strength after 7, 14, 28 and 60 days of curing. Plain concrete
samples were also cast and tested for reference purposes.
Permeability was observed to decrease significantly with the addition of steel fibres
and continued to decrease with increasing fibre content and increasing curing age.
An exponential relationship was observed between permeability and compressive
and split tensile strengths for SFRC as well as PCC. The Analysis of Variance
(ANOVA) statistical method was used to evaluate the effect of fibre content on the
permeability and strength characteristics. A ? level (probability of error) of 0.05 was
used for ANOVA test. Regression analysis was carried out to develop relationship
between permeability, compressive strength and curing age.