Civil Engineering Reference
In-Depth Information
Table 14.2
Categories according to the constituents of the recycled coarse
aggregates (Lay, 2006)
Constituent
Content (wt %)
Category
R
C
≥
90
R
C
90
≥
70
R
C
70
<70
R
C
D
no requirement
R
C
SR
R
C
+ R
U
≥
90
R
CU
90
≥
70
R
CU
70
≥
50
R
CU
50
<50
R
CU
D
no requirement
R
CU
SR
R
B
<10
R
B
10
<30
R
B
30
<50
R
B
50
>50
R
B
D
no requirement
R
B
SR
R
A
<1
R
A
1-
<5
R
A
5-
<10
R
A
10-
FL
S
+FL
NS
<1
FL
total
1
<3
FL
total
3
FL
NS
<0.01
FL
NS
0.01
<0.05
FL
NS
0.05
<0.1
FL
NS
0.1
X+R
G
<0.2
XR
G
0.2
<0.5
XR
G
0.5
<1
XR
G
1
Table 14.3
Constituents of recycled coarse aggregates (Lay, 2006)
Constituent
Description
R
C
Concrete, concrete products, mortar, concrete brick
R
U
Natural stone, recycled aggregate clean (without mortar)
R
B
Bricks, tiles, masonry units, calcium silicate, non-floating
aerated concrete
R
A
Bituminous material
R
G
Glass
Floating stone material (<1 mg/m
3
)
FL
S
Floating non-stone material (<1 mg/m
3
)
FL
NS
X
Others: cohesive materials (soils and clays), metals, non-
floating wood, plastic, rubber
of at least 90% by mass of fragments, based on Portland cement and
stones. If its coarse fraction is composed of less than 90% by mass of
fragments based on Portland cement and stones, it is named recycled
mix aggregate (rMA)
