48 / 237
MASTER CONTRACT:
260881
REPORT:
2784857
PROJECT:
2784857
Page No:
3
Date Issued:
March 24, 2015
DQD 507.10 Rev. 2013-06-19
c)
The air content of plastic concrete shall be tested, as part of the uniformity tests, prior to a decision on the
acceptance of the mixing equipment.
d)
The air content of freshly mixed plastic concrete shall be determined in accordance with CSA A23.2-4C.
2)
Compressive strength testing of concrete cylinders
a)
Compliance with the specified compressive strength shall be determined by the following:
i)
Testing a minimum of two cylinders from each type of concrete mix each day, or a minimum of two
cylinders for each 30 m
3
of any one mix when daily production exceeds 30 m
3
.
ii)
When daily quantities are small, one test shall be performed for every 3 m
3
.
iii)
When daily quantities are smaller than 3 m
3
, two tests shall be performed each week.
iv)
Cylinders for determining handling strengths shall be made from each new mix until the
manufacturing facility has correlated the cylinder strength to the maturity of the concrete in
accordance with ASTM C1074.
b)
Compressive strength of concrete cylinders shall be determined in accordance with CSA A23.2-9C.
3)
Temperature of freshly mixed plastic concrete
a)
The temperature of plastic concrete shall be measured with every strength test.
b)
The temperature of freshly mixed plastic concrete shall be determined in accordance with CSA A23.2-
17C.
4)
Slump of freshly mixed plastic concrete
a)
A sufficient number of tests shall be made to ensure uniform slump of the concrete.
b)
A slump test shall be made with every strength test and every second or third air test.
c)
Slump of freshly mixed plastic concrete shall be determined in accordance with CSA A23.2-5C.
WARNING
The factory tests specified herein may present a hazard of injury to personnel and/or property and should only
performed by persons knowledgeable of such hazards and under conditions designed to minimize the possibility
of injury.
SPECIAL INSTRUCTIONS FOR FIELD SERVICES
1) Component descriptions marked with either the “(INT)” or “(INT*)” identifiers may be substituted with other
components providing the requirements specified under the notes in the “Description” are complied with.
COMPONENT SPECIAL PICKUP
1) Component descriptions marked with the identifier “(CT)” are subject to annual pickup and Conformity
Testing.
CONDITIONS OF ACCEPTABILITY
1) Design basis
a) The structural design of precast concrete shall be in accordance with CAN/CSA-A23.3 or CAN/CSA-S6.
Note:
Users may contact the authority having jurisdiction for further information.
PRECAST CONCRETE
Property of
l
DO NOT COPY