(3) Two cores: Specific gravity, absorption, and voids in
concrete in accordance with ASTM C 642.
(4) Three cores: Resistance to chloride ion penetration in
accordance with ASTM C 1202 at ages 28 and 90 days.
(5)
Compressive strength in accordance with ASTM C 39.
two cores at 24 hours
one core at 3 days
two cores at 7 days
three cores at 28 days
two cores at 90 days
three spare cores
e.
Sampling and determination of water soluble chloride ion content
in accordance with ASTM C 1218/C 1218M. Maximum water soluble
chloride ion concentrations in hardened concrete at ages from 28
to 42 days contributed from the ingredients including water,
aggregates, cementitious materials, and admixtures shall not
exceed the limits of Table 5 below.
[f.
Sampling and determination of chloride ion penetration (ponding
test) in accordance with AASHTO T 259.]
**************************************************************************
NOTE: For epoxy or zinc-coated reinforcing bars,
the limits in Table 5 may be more restrictive than
necessary. Where appropriate, submit alternative
solutions with supporting technical literature for
review.
**************************************************************************
Table 5 - Maximum Chloride Ion Content for Corrosion Protection
Maximum water soluble
chloride ion (C1) in concrete,
Type of Member
percent by weight of cement
Prestressed concrete
0.06
Reinforced concrete exposed to
0.08
chloride in service
Reinforced concrete that will be
0.15
dry or protected from moisture
in service
Other reinforced concrete construction
0.30
f.
Submit test results for evaluation and acceptance.
3.8.2
Sampling
a.
ASTM C 172. Collect samples of fresh concrete to perform tests
specified. ASTM C 31/C 31M for making test specimens.
b.
Sample concrete on a random basis except where a batch appears to
be deficient and the test can be used to verify the observed
SECTION 03311
Page 42
Previous Page
