Coarse
aggregate
Type
SG
BUW
MSA*
Percent Fines
Source A
Gravel
2.85
110 lb/cf
2" (-)
0.5
Source B
Gravel
2.60
95 lb/cf
1"(-)
1.0
Source C
Gravel
2.70
103 lb/cf
1/2" (-)
1.3
NOTE: *SG = specific gravity; *BUW = bulk unit weight *MSA = maximum size aggregates
1.
Select cement type.
a.
Availability
b.
Climate
c.
Specifications
_____
2.
Select aggregates.
a.
Fine aggregate
(1)
Fineness modulus
_____
(2)
Specific gravity
_____
(3)
BUW
_____
(4)
Percent fines
_____
b.
Coarse-aggregate
(1)
Maximum size aggregate allowable for the project:
1/5 x T = 1/5 x _____ = _____
1/3 x D = 1/3 x _____ = _____
3/4 x Minimum clear space (MCS) = 3/4 x _____ = _____
MSA for mixing equipment = _____
MSA for the project (smallest of above) = _____
(2)
Chosen aggregate:
Type __________
MSA __________
Specific gravity __________
Bulk unit weight __________
Percent fines __________
3.
Select design slump (see Table 2-4 on page 2-6).
Maximum __________
Minimum __________
4.
Select w/c ratio.
EN5466
2-26
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