06/1168 - Change a Development Approval [As Published] · 132006.1168.02

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production assessment in accordance with Section 19 of AS 3600 and submit satisfactory evidence that
the qualifications for a controlled strength grade have been met, if appropriate.

All concrete shall also be subject to project assessment of strength in accordance with Section 19 of AS
3600. The frequency of sampling shall not be less than the following:

 

 

 

 

 

Size of concrete pour No. of samples

0-5m° 1

5-10m° 2

10 - 25m? 3

Greater than 25 m? 3 for the first 25 m* plus 1 for each additional 25 m°.

 

 

 

 

Note that two (2) test cylinders are required from each sample.

6.5 Costs for all Testing

The Contractor shall be responsible for the performance of all tests and shall meet the cost of all testing
associated with the concrete work for all classes of concrete specified including normal and special
grades. All testing shall be carried out in a laboratory registered by NATA and test certificates shall be
issued to the Superintendent within two (2) working days after test results have been received from the
testing authority. In particular this refers to the compression testing of concrete specimens.

Testing for consistency of concrete by the slump test shall be performed on site on every batch of
concrete delivered to the site. The target slump for all concrete shall be 70-90 mm unless specified
otherwise in this specification. The slump tests shall be performed by a person approved by the
Superintendent and competent to perform these tasks in accordance with the Australian Standard
method. All costs are the responsibility of the Contractor. All concrete slump tests shall be recorded in a
"Concrete Records book" kept on site by the Contractor.

6.6 Reinforcement

The material and construction requirements for reinforcing steel shall be in accordance with Clause 19.2
of AS 3600. The Contractor shall be responsible to ensure that reinforcement is placed and held in
position during a concreting operation. The tolerance on position of reinforcement shall comply with
Clause 19.5.3 of AS 3600. Reinforcement shall be 500N grade to AS4671.

If reinforcing is in storage on the site, it shall be covered to protect it from the weather and shall be stored
off the ground.

6.7 Handling and Placing of Concrete
No concrete shall be placed in water without the permission of the Superintendent.

Before placing any concrete, all debris of any description shall be removed from the spaces to be
occupied by the concrete, all reinforcement and the surfaces of the forms shall be cleaned and the forms

41/22382/11840 Girraween Sports Precinct 36
Earthworks Package