SECTION 02751 - CEMENT CONCRETE PAVEMENT - Tempe ...

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Farmington Field Office Construction


Amen
dment No. 6

Bureau of Land Management


FARMINGTON
FIELD

OFFICE


CEMENT CONCRETE PAVEMENT

SEPTEMBER

2009


02751

-

1

SECTION
02751

-

CEMENT CONCRETE PAVEMENT

(REVISED)

3.10



FIELD QUALITY CONTROL

A.

Testing Agency: Engage a qualified testing agency to perform tests and inspections.

B.

Testing Services: Testing of composite samples of fresh

concrete obtained according to
ASTM

C

172 shall be performed according to the following requirements:

1.

Testing Frequency: Obtain at least one composite sample for each
25
100

cu. yd.

(76
cu.

m)

or fraction thereof of each concrete mixture placed each day.

a.

When frequency of test
ing will provide fewer than five compressive
-
strength tests
for each concrete mixture, testing shall be conducted from at least five randomly
selected batches or from each batch if fewer than five are used.

2.

Slump: ASTM

C

143/C

143M; one test at point of p
lacement for each composite sample,
but not less than one test for each day's pour of each concrete mixture. Perform
additional tests when concrete consistency appears to change.

3.

Air Content: ASTM

C

231, pressure method; one test for each composite sample, but not
less than one test for each day's pour of each concrete mixture.

4.

Concrete Temperature: ASTM

C

1064/C

1064M; one test hourly when air temperature is
40 deg

F

(4.4 deg

C)

and below and when it is
80 deg

F

(27 deg

C)

and above, and one
test for each composite sample.

5.

Compression Test Specimens: ASTM

C

31/C

31M; cast and labo
ratory cure one set of
three standard cylinder specimens for each composite sample.

6.

Compressive
-
Strength Tests: AST
M

C

39/C

39M; test one specimen at seven days and
two specimens at 28 days.

2.
Five concrete test cylinders will be prepared by the Contractor for each 25 or less cubic
yards or at least once each day of concrete placement.

Test cylinders shall be
made in accordance with ASTM C31 and tested in accordance
with ASTM C39.

Note on Record Drawings placement location represented by cylinders.

Test 2 cylinders from each set at 7 days, and 2 from each set at 28 days. Maintain the last
cylinder from each se
t for testing in the event the 28
-
day tests fall below the required
strength.

3.

One additional test cylinder will be taken during cold weather concreting and cured on
jobsite under the same conditions as the concrete it represents.

4.

One slump

test, one air

te
st

(ASTM C231) and one temperature (ASTM C1064)
will be
taken for each truck and for each set of test cylinders taken.

5.

Slump of concrete shall be determined at point of discharge from the mixer in accordance
with ASTM C143.

C.


Strength of each concrete mix
ture will be satisfactory if average of any three consecutive
compressive
-
strength tests equals or exceeds specified compressive strength and no
Farmington Field Office Construction


Amen
dment No. 6

Bureau of Land Management


FARMINGTON
FIELD

OFFICE


CEMENT CONCRETE PAVEMENT

SEPTEMBER

2009


02751

-

2

compressive
-
strength test value falls below specified compressive strength by more than
500 psi

(3.4 MPa)
.

D.

Test

results shall be reported in writing to
COR
, concrete manufacturer, and Contractor within
48 hours of testing. Reports of compressive
-
strength tests shall contain Project identification
name and number, date of concrete placement, name of concrete testin
g and inspecting agency,
location of concrete batch in Work, design compressive strength at 28 days, concrete mixture
proportions and materials, compressive breaking strength, and type of break for both 7
-

and 28
-
day tests.

E.

Nondestructive Testing: Impact
hammer, sonoscope, or other nondestructive device may be
permitted by
COR

but will not be used as sole basis for approval or rejection of concrete.

F.

Additional Tests: Testing and inspecting agency shall make additional tests of concrete when
test results indicate that slump, air entrainment, compressive strengths, or other requirements
have not been met, as directed by
COR
.

G.

Concrete paving will be considered defective if it does not pass tests and inspections.

H.

Additional test
ing and inspecting, at Contractor's expense, will be performed to determine
compliance of replaced or additional work with specified requirements.

I.

Prepare test and inspection reports.

J.

The Contractor shall furnish a batch ticket (delivery ticket) with each
load for all classes of
concrete. Concrete delivered without a batch ticket containing complete information as
specified shall be rejected. The Contractor shall collect and complete the batch ticket at the
placement site and deliver all batch tickets to
the COR on a daily basis. The COR shall have
access to the batch tickets at any time during the placement. The following information shall be
provided on each batch ticket:

1.

Supplier’s name and date

2.

Truck number

3.

Project number and location

4.

Concrete class designation and item number

5.

Cubic yards batched

6.

Time batched

7.

Mix design number

8.

Type, brand, and amount of each admixture

9.

Type, brand, and amount of cement and fly ash

10.

Weights of fine and coarse aggregates

11.

Moisture of f
ine and coarse aggregate

12.

Gallons of batch water (including ice)

The Contractor shall add the following information to the batch ticket at the placement site:

13.

Gallons of water added by truck operator plus quantity of concrete in the truck each time
wate
r is added

Farmington Field Office Construction


Amen
dment No. 6

Bureau of Land Management


FARMINGTON
FIELD

OFFICE


CEMENT CONCRETE PAVEMENT

SEPTEMBER

2009


02751

-

3

14.

Number of revolutions of drum at mixing speed (for truck mixed concrete)

15.

Discharge time

16.

Location of batch in placement

17.

Water cement ratio

K.

Complete a Government Concrete Placement Form. The placement form shall be completed
jointly by the Contra
ctor and Government personnel. A blank placement form is included in
this section.

L.

The Contractor will be allowed to add water to the batched concrete once at the site, provided
that the specified water to cement ratio is not exceeded and the amount of wa
ter withheld at the
batch plant is on the delivery ticket.


1.2

REPAIRS AND PROTECTION

A.

Remove and replace concrete paving that is broken, damaged, or defective or that does not
comply with requirements in this Section. Remove work in complete sections from joint to
joint unless otherwise approved by
COR
.

B.

Drill test cores, where directed by
COR
, when necessary to determine magnitude of cracks or
defective areas. Fill drilled core holes in satisfactory paving areas with portland cement
concrete bonded to paving with epoxy adhesive.

C.

Protect concrete paving from damage. Exclude traffic from pa
ving for at least 14 days after
placement. When construction traffic is permitted, maintain paving as clean as possible by
removing surface stains and spillage of materials as they occur.

D.

Maintain concrete paving free of stains, discoloration, dirt, and o
ther foreign material. Sweep
paving not more than two days before date scheduled for Substantial Completion inspections.

END OF SECTION 02751