Crack pattern of specimens
Diagonal cracks were noticed more at the joint of the
control specimens with reinforcement detailing as per IS
456-(2000) and IS 13920-(1993) compared to the specimens
casted by using HPC mix with 10 % silica fume and
0.3 % glass fibre. The provision of cross-diagonal bars at
the joint reduces the congestion of reinforcement and also
formations of diagonal cracks were reduced. All the
specimens have increased load-carrying capacity and
reduction of diagonal cracks compared to the specimens
designed without cross-diagonal bars in the previous
research works (Figs. 9, 10, 11, 12).
Load vs. deflection characteristics
In the load versus deflection characteristics, ultimate load
and ultimate deflection were compared for each specimen
as shown in Fig. 13. IS 456 with SF specimen had high,
ultimate load-carrying capacity and lower deflection than
IS 456 control specimen by 16 %. IS 13920 with SF
specimen had high, ultimate load-carrying capacity and
lower deflection than IS 13920 control specimen by 22 %.
It is concluded from the load versus deflection
characteristics graph that specimens having HPC mix
with silica fume and glass fibre showed better ultimate