Civil Engineering Reference
In-Depth Information
T ABLE 7.9
Minimum Requirements of
Cementing Materials for Concrete Used in
Flatwork*
Maximum Size
of Aggregate
Cementing Materials,
kg/m
3
(lb/yd
3
)**
mm (in.)
1
1
37.5
1
2
2
280 (470)
25.0 (1)
310 (520)
3
4
19.0
1
2
320 (540)
1
2
12.5
1
2
350 (590)
9.5 (3/8)
360 (610)
*American Concrete Institute (ACI 302).
**Cementing materials quantities may need to be
greater for severe exposure. For example, for
deicer exposures, concrete should contain at
least 335 kg/m
3
(564 lb/yd
3
) of cementing
materials.
T ABLE 7.10
Estimate of Weight of Freshly Mixed
Concrete
Maximum
Non Air Entrained
Air Entrained
Aggregate
Concrete
Concrete
kg/m
3
(lb/yd
3
)
kg/m
3
(lb/y
3
)
Size, mm (in.)
9.5 (3/8)
2276 (3840)
2187 (3690)
1
2
12.5
1
2
2305 (3890)
2228 (3760)
3
4
19.0
1
2
2347 (3960)
2276 (3840)
25.0 (1)
2376 (4010)
2311 (3900)
1
1
37.5
1
2
2
2412 (4070)
2347 (3960)
50.0 (2)
2441 (4120)
2370 (4000)
75.0 (3)
2465 (4160)
2394 (4040)
150 (6)
2507 (4230)
2441 (4120)
In the absolute volume method of mix design, the component weight
and the specific gravity are used to determine the volumes of the water,
coarse aggregate, and cement. These volumes, along with the volume of the
air, are subtracted from a unit volume of concrete to determine the volume
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