Z E M C H 2 0 1 2 I n t e r n a t i o n a l C o n f e r e n c e
654
0.00
0.01
0.02
0.03
0
100
200
300
400
500
600
Stress (MPa)
Strain
D10 (Longitudinal steel)
D6 (Transverse reinforcement )
particular, there has been insufficient research on the applicability of electric arc furnace
oxidizing slag aggregate as a structural member (Kim 2007). Thus, this study was
conducted on the development of a configuration of transverse reinforcement of columns
using electric arc furnace oxidizing slag aggregate based on previous research to apply it
as an eco-friendly structural member (Kim 2012).
Materials
In this study, in order to examine the
development of a configuration of transverse
reinforcement of columns using electric arc furnace oxidizing slag, a specimen was
fabricated using concrete with target strength of 30MPa as shown in Table 1 and natural
aggregate (AN) and electric arc furnace oxidizing slag aggregate (AS) were used. The
electric arc furnace oxidizing slag aggregate used in the experiment satisfied the quality
standards for aggregate used in concrete structures. The concrete specimen were cast
with a dimension of
100x200mm. The results of the compressive strength test showed a
compressive strength of 34.9MPa for AN and 32.1MPa for AS. The stress-strain curve for
the concrete is shown in Fig. 1(a).
A D10 reinforcement steel bar with a flexural yielding of 300.4MPa was used in order to
obtain the flexural yielding of longitudinal reinforcement, and D6 reinforcement steel bar
with a flexural yielding of 453MPa was used as the transverse reinforcement. The stress-
strain curve for the reinforcement bar used in the experiment is shown in Fig. 1(b) with its
mechanical properties summarized in Table 2.
Table 1: Concrete mix proportions
Specimen
Design
strength
(MPa)
W/C
(%)
S/a
(%)
Unit weight (kg/m
3
)
W
C
S
G
AD
AN
30
41.2
45.5
180
383
750
905
3.06
AS
30
45.2
47.0
175
341
1141
1251
2.71
Table 2: Physical properties of reinforcements
Steel bar
A
s
(mm
2
)
f
y
(MPa)
f
u
(MPa)
E
s
(GPa)
Note
D10
71.3
300.4
395.3
167
Longitudinal
reinforcement
D6
28.3
453.0
456.0
196
Transverse
reinforcement
0
10
20
30
40
-0.004 -0.002 0.000 0.002 0.004
Axial strain
Stress (MPa)
Lateral strain
AN AS
AN
AS
Figure 1: Stress versus strain relationships of materials
(a) Concrete
(b) Reinforcement
