scope:

The specification sets out the overall performance requirements of the concrete for refurbishment of tube track; and the specific requirements for:

• Constituent materials,

• Concrete mix design,

• Batching and mixing of the concrete,

• Fresh concrete properties,

• Placing and finishing of the concrete,

• Post placing and treatment of the concrete,

• Limitations on cracking,

• Testing of proposed material and mix design to justify general conformance with the requirements,

• Quality control testing to demonstrate the concrete supplied meets the specified requirements.

Purpose

The purpose of this specification is to set out the concrete performance to be achieved (materials and processes) for tube track including the requirements for the manufacture, supply and installation of pre-bagged dry-mix and ready mix concretes.