lieu of this specification for concrete.
Do not change the selected option
during the course of the work.
]2.3.2
Contractor-Furnished Mix Design
**************************************************************************
NOTE: For concrete exposed to weather or special
exposure conditions, leave in optional column[s] and
select air entrainment and water-cement ratio. When
specifying air entrainment give one number and allow
variation of 1.5 percent on either side.
AIR ENTRAINMENT AND AGGREGATE SIZE:
Aggregate
Air Content, Percent
Nominal Maximum
Size
Moderate
Size (mm)
No.
Exposure
10
8
8
13
7
7
20
67
7
25
57
5
35
467
5
___________________________________________________
Aggregate
Air Content, Percent
Nominal Maximum
Size
Moderate
Size (inches)
No.
Exposure
3/8
8
8
1/2
7
7
3/4
67
7
1
57
5
1 1/2
467
5
___________________________________________________
Maximum aggregate size should not exceed:
1.
1/5 the dimension of nonreinforced members.
2. 3/4 the clear spacing between reinforcing bars
or between reinforcing bars and forms.
3. 1/3 the depth of nonreinforced slabs on the
ground.
CONCRETE FOR FLOORS (From ACI 301): The following
criteria applies only when structural or durability
requirements do not necessitate higher strengths:
[28 day Max.
Usual
Str.
Slump
Class
Traffic
Typical Uses
MPa
mm
1
Light foot
Residential or tile
20
100
covered
2
Foot
Offices, churches,
24
100
schools, hospitals,
SECTION 03300N
Page 17
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