Civil Engineering Reference
In-Depth Information
aggregates concrete varied in the ranges of 16.5-25.1 GPa and 16.1-22.2 GPa,
respectively, at various w/c ratios.
Topcu and Canbaz (
2007
) observed a reduction of up to 40 % in the splitting
tensile strength of concrete when coarse NA were replaced by tile waste aggre-
gates. Brito et al. (
2005
) observed a linear decreasing trend in flexural strength of
concrete pavement blocks with increasing content of aggregates from ceramic
hollow brick as partial replacement of coarse limestone aggregates. However, the
reduction in flexural strength of concrete was 26 % in comparison to 45 % in
compressive strength when coarse NA were completely replaced by ceramic
aggregates (Fig.
4.65
). A considerable reduction in flexural strength and modulus
of elasticity was also observed when crushed ceramic brick was used as partial and
full replacement of natural fine and coarse aggregates in concrete (Debieb and
Kenai
2008
). On the other hand, Cachim (
2009
) observed slightly higher or similar
flexural strength and modulus of elasticity of concrete with coarse brick aggregates
at 15 and 30 % replacement level of coarse aggregates than that observed for
conventional concrete.
Suzuki et al. (
2009
) observed a decreasing trend in 28-day splitting tensile
strength of high-performance concrete with increasing content of porous ceramic
aggregates (after observing a slight increase at the of 10 % by volume replacement
level of coarse aggregates), due to a weaker interfacial bonding of ceramic
aggregates-cement paste than for NA-cement paste. The Young's modulus of
elasticity also decreased as the content of ceramic aggregates rose.
Cachim (
2009
) drew similar stress-strain curves for conventional concrete and
concrete with two types of coarse brick aggregates replacing 15 and 30 % by
volume of natural coarse aggregates. Topcu and Canbaz (
2007
) observed lower
toughness of concrete with tile waste as partial and full replacements of coarse
aggregates than that of conventional concrete.
Contrasting results are available on the effect of ceramic aggregates incorpo-
ration on the abrasion resistance of concrete due to changes in the properties of the
aggregates. In some studies, the incorporation of fine or coarse ceramic aggregates
improved the abrasion resistance of the resulting concrete due to good adhesion of
porous ceramic aggregates to the cement paste (Brito et al.
2005
; Binici
2007
).
Fig. 4.65 Compressive
strength (CS) and flexural
strength (FS) of concrete with
waste ceramic aggregate
(Brito et al.
2005
)
25
CS
FS
20
15
10
5
0
0
25
50
75
100
Replacement percentage (%)
