control mix. On the other hand, using 100% RCA instead of
NCA help in reducing the cost by 8%.
To assess the profitability of each mix, the compressive
strength of each mix was linked with its cost in Fig. 7. The
compressive strength was selected from the mechanical
properties because it mainly characterizes the strength of
concrete. In Fig. 7, a value index was assumed as a ratio of
the cylindrical compressive strength to the cost of the same
mix. High index value refers that the mix can sustain a high
strength at low cost.
From Fig. 7, all mixes with replacement provide a higher
value index than the mix without any replacement (M0).
Moreover, MRA100-CFA20 and MRA100-CFA20-CWP20
give a high-value index by 30% and 26%, respectively.
However, MRA100-CFA20-CWP20 could be the best
choice although it has a slightly less value index than
MRA100-CFA20. It is because replacement the cement is
much effective in reducing the CO 2 emission.
5 Conclusions
In this research, an experimental study has been conducted
to evaluate using the recycled materials produced into concrete in the UAE. The use of 100% Recycled Coarse
Aggregate (RCA) as a replacement of Natural Coarse
Aggregate (NCA), 20% Ceramic Waste Powder (CWP) as
replacement of the cement and 20% of Ceramic Fine
Aggregate (CFA) as replacement of Natural Fine Aggregate
(NFA) were applied in this work. The mechanical properties
and the cost of the mixes prepared using these replacements
were obtained. The conclusions of this study can be summarized as follows:
1. Using the RCA produced in UAE doesn’t affect that
much the mechanical properties of the new recycled
concrete. It was found that using 100% of RCA reduces
Table 5 The unit price of the
concrete ingredients
Material
Cement
Ceramic
NCA
20 mm
NCA
10 mm
RCA
14 mm
NFA
Water
Plasticizer
Cost
(DHS/kg
or L)
0.283
0.0018
0.036
0.038
0.018
0.028
0.007
6
Fig. 6 The cost of the mixes in
Table 2
Fig. 7 Value index: ratio of the
cylindrical compressive strength
to the mix cost
154
S. T. M. Ali and M. Batikha
NCA help in reducing the cost by 8%.
To assess the profitability of each mix, the compressive
strength of each mix was linked with its cost in Fig. 7. The
compressive strength was selected from the mechanical
properties because it mainly characterizes the strength of
concrete. In Fig. 7, a value index was assumed as a ratio of
the cylindrical compressive strength to the cost of the same
mix. High index value refers that the mix can sustain a high
strength at low cost.
From Fig. 7, all mixes with replacement provide a higher
value index than the mix without any replacement (M0).
Moreover, MRA100-CFA20 and MRA100-CFA20-CWP20
give a high-value index by 30% and 26%, respectively.
However, MRA100-CFA20-CWP20 could be the best
choice although it has a slightly less value index than
MRA100-CFA20. It is because replacement the cement is
much effective in reducing the CO 2 emission.
5 Conclusions
In this research, an experimental study has been conducted
to evaluate using the recycled materials produced into concrete in the UAE. The use of 100% Recycled Coarse
Aggregate (RCA) as a replacement of Natural Coarse
Aggregate (NCA), 20% Ceramic Waste Powder (CWP) as
replacement of the cement and 20% of Ceramic Fine
Aggregate (CFA) as replacement of Natural Fine Aggregate
(NFA) were applied in this work. The mechanical properties
and the cost of the mixes prepared using these replacements
were obtained. The conclusions of this study can be summarized as follows:
1. Using the RCA produced in UAE doesn’t affect that
much the mechanical properties of the new recycled
concrete. It was found that using 100% of RCA reduces
Table 5 The unit price of the
concrete ingredients
Material
Cement
Ceramic
NCA
20 mm
NCA
10 mm
RCA
14 mm
NFA
Water
Plasticizer
Cost
(DHS/kg
or L)
0.283
0.0018
0.036
0.038
0.018
0.028
0.007
6
Fig. 6 The cost of the mixes in
Table 2
Fig. 7 Value index: ratio of the
cylindrical compressive strength
to the mix cost
154
S. T. M. Ali and M. Batikha