REGULAR TESTS
ABBREVIATED
ALLOWABLE
TESTS
MAXIMUM RANGE
ALLOWABLE
PARAMETER
FOR AVERAGE
MAXIMUM RANGE
OF 3 BATCHES
FOR 1 BATCH
Unit weight of air-free mortar, kg/cu m1) 16
16
Air content, percent1)
1.0
--
Slump, mm1)
25
--
Coarse aggregate, percent1),2)
6.0
6.0
Compressive strength at 7 days1),2)
10.0
10.0
Water content1),2), percent
1.5
1.5
Consistency, modified Vebe2), second
7.0
--
Note:
1) = Test for conventional concrete mixed in stationary mixer,
2) = Test for RCC
REGULAR TESTS
ABBREVIATED
ALLOWABLE
TESTS
MAXIMUM RANGE
ALLOWABLE
PARAMETER
FOR AVERAGE
MAXIMUM RANGE
OF 3 BATCHES
FOR 1 BATCH
Unit weight of air-free mortar, lb/cu ft1)
2.0
2.0
Air content, percent1)
1.0
--
Slump, in.1)
1.0
--
Coarse aggregate, percent1),2)
6.0
6.0
Compressive strength at 7 days1),2)
10.0
10.0
Water content1),2), percent
1.5
1.5
Consistency, modified Vebe2), second
7.0
--
Note:
1) = Test for conventional concrete mixed in stationary mixer,
2) = Test for RCC
A regular test will be performed before concrete production begins and when
the Contractor requests a reduced mixing time. An abbreviated test shall
be performed every 3 months when concrete is being placed. If a mixer
fails the abbreviated test, a regular test will be performed. Cost of
testing when the Contractor requests a reduced mixing time will be paid by
the Contractor.
3.1.4
Sampling Facilities
3.1.4.1
Sampling Concrete
The Contractor shall provide suitable facilities and labor for obtaining
representative samples of concrete in accordance with ASTM C 172 for
Contractor quality control and Government quality assurance testing.
3.1.4.2
Sampling Aggregates
Suitable facilities shall be provided for readily obtaining representative
samples of aggregates for test purposes immediately prior to the material
entering the mixer.
SECTION 03701
Page 39
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