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doi:10.3850/978-981-08-7920-4_S3-I006-cd
Influence of Glass Fiber Wrapping on Strength Properties of Concrete
Ravande Kishore, V. Bhikshma and P. V. S. S. V. P. Raju
Department of Civil Engineering, Osmania University, Hyderabad, India.
ABSTRACT
Civil engineering structures are susceptible to damages due to natural calamities such as
earth quakes, floods, cyclones, tsunami etc. While some structures become unserviceable, the
others become partially unserviceable or distressed structures. The distressed structures can be
restored by using retrofitting and rehabilitation techniques. Several methods of retrofitting and
rehabilitation of structures are available. However, more research is necessary to explore new
rehabilitation/retrofitting materials, and improved technology of rehabilitation/retrofitting
which are cost effective and time effective. The research work presented in this paper is one
such attempt to identify new materials and better technology. This paper presents the details
of an investigation programme carried out to examine the influence of fiber wrapping on
compressive strength and flexural strength of concrete. Two grades of concrete viz., M20 and
M25 were considered to evaluate the influence of glass fiber mat wrapping in enhancing their
compressive strength and flexural strength. The experiments were carried out with single layer
and double layer of glass fiber mat wrapping. The test results pertaining to strength parameters
of fiber wrapped specimens were compared with those without fiber wrapping to understand
the influence of glass fiber mat wrapping. The test results indicated that fiber wrapping around
the specimens in single and double layers provided effective confinement to the concrete. As
a result of improved confinement, a significant increase in compressive strength and flexural
strength in the order of 1.7 to 4.8 times and 3.8 to 5.0 times respectively was attained. Further,
the fiberwrapped specimens indicated improved ductility which is another significant outcome
of the present research work. In general, the results of investigation are positive in favor of glass
fiber mat as effective rehabilitation material.
Keywords: Glass fiber mat, Compressive strength, Flexural strength.
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