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

6. Concrete Work

6.1 Materials and Construction Requirements

Materials and construction requirements for concrete shall be in accordance with Section 19 of Australian
Standard AS 3600. Materials used for concrete work shall comply with Australian Standards listed in
Clause 19.1 of AS 3600. All concrete used in this contract shall be manufactured in accordance with AS
1379.

All concrete to be incorporated in the works shall be sourced from a quality assured Readymix Concrete
Supplier.

Concrete materials shall be proportioned so that when manufactured in accordance with AS 1379 and
transported, placed, compacted, finished and cured in accordance with AS 3600 and this Specification,
the hardened concrete will satisfy the design requirements for strength, serviceability and durability.
Type GP cement shall be used.

A manufacturer's certificate in the form of a delivery docket in accordance with AS 1379 shall be supplied
for each batch and shall be retained by the Contractor. Such certificates shall be held and maintained in
the Contractors quality records for the project. Further, the Contractor shall obtain a statement from the
manufacturer qualifying the quality standard of the concrete in accordance with the requirements as
specified herein.

No admixtures shall be used without the written approval of the Superintendent. The Contractor shall
submit full details of the mix proportions intended to be used for this contract.

The Contractor shall advise the Superintendent of the name of his intended concrete supplier for the
Superintendent's review and approval, if acceptable. The Contractor shall advise whether his concrete
supplier's manufacturing plant complies with AS 3600, in regard to production of standard strength
grades of concrete.

All aggregates shall comply with the requirements of AS 2758.1 "Concrete Aggregates".

6.2 Concrete Strength Criteria

All concrete work is specified as normal class concrete or special class as shown on the Notes on the
drawings.

6.3 Rejection of Concrete
The provisions of Clause 19.1.7 of AS 3600 shall be read in full as part of this specification.

6.4 Testing and Assessment for Compliance of Concrete Specified by
Compressive Strength

All concrete shall be subject to production assessment in accordance with AS 3600 Section 19. Prior to
the commencement of concrete work, the Contractor shall advise which procedure is to be used for

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