It is confirmed that strengthening beam using NSM
technique has fully utilised the tensile strength of the bar and
lead to more cost-effective method. It is intentionally to
compare two different types of Fibre Reinforced Polymer
(FRP) using two different techniques namely GFRP bar for
NSM and CFRP sheet for EB techniques to prove the cost
effectiveness of using more economic bar to the other one.
Increase ranging from 23% to 53% over the corresponding
beams without NSM GFRP bars.
Meanwhile, Barros and Dias (2006), as in [9] noted on the
larger strength of RC beams strengthened with NSM CFRP
bar over those of EB CFRP. Their investigation revealed that
using the maximum load carrying capacity of the unreinforced
beams, for comparison purpose, the beam strengthened by EB
and NSM technique showed an average increase of 54% and
83%, respectively. Unlike the present investigation, Barros
and Dias used two (2) layers of U strips of CFRP sheets and
laminate strips of CFRP for EB and NSM technique
respectively. The superior performance of NSM technique
over the EB is attributed to the ability of the strips to be
anchored into members adjacent to the strengthened one,
which is the debonding is more critical in the maximum
moment region [8].
1235