Viridian III Technical Specification OPW1 [As Published] · 142008.256

                                                                           VIRIDIAN III - Landscape Works

             Location                        Pavement Type        Pavement Type
                                             1A                   2A Sub-base
             Grade (Mpa)                     25                   25
             Maximum Aggregate Size          20                   20
             (mm)
             Slump (mm)                      80                   80
             Maximum Total                   0.45                 0.45
             Water/Cement Ratio
             Minimum Cement content          360                  360
             (Kg/m3)



6.4    REJECTION OF CONCRETE

6.4.1 GENERAL

The provisions of Clause 19.1.7 of AS 3600 shall be read in full as part of this Specification.

6.5    REINFORCEMENT

6.5.1 GENERAL

The material and construction requirements for reinforcing steel shall be in accordance with
Clause 19.2 of AS 3600. The reinforcement shall be 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 BHP Tempcore or approved equivalent for all
"N" grade reinforcement.

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.

The concrete shall have a temperature not higher than 32EC when placed, which shall be
achieved by using the above precautions if necessary.

6.6    JOINTS

6.6.1 GENERAL

Construction joints shall be made where shown on the Drawings and approved by the
engineer or in locations approved by the Builder. In general, concrete pours shall be made
in as large a section as possible to minimise the number of construction joints required.
Where stoppage of concreting operations occurs for any reason, construction joints shall be
placed either horizontally or vertically as needed, provided with keys to resist shear, and
dowels to develop bond as directed by the Builder. All reinforcement shall continue through
construction joints.

Before depositing new concrete against concrete which has hardened, the forms shall be re-
tightened and the surface of the old concrete shall have all loose projecting aggregate,
laitance, and other objectionable substances removed, shall be roughened by scabbling or
other suitable means as required by the Builder, and shall be thoroughly washed and
saturated with clean water.

After excess water has been removed, a layer of cement mortar of similar composition to
that embodied in the new concrete, excluding the large aggregate and of plastic consistency,
about 12 mm in thickness shall be thoroughly broomed and brushed over the prepared
surface and worked into all crevices and depressions after which the new concrete shall be
placed immediately so as to make a thoroughly bonded and watertight joint.
EDAW Aust                              Page 18                           February 2008