AS 2758.6 pdf download

AS 2758.6 pdf download.Aggregates and rock for engineering purposes
2  Application
These guidelines may form the basis of a works specification but cannot be used as a specification in themselves. The designer or specifier is presented with a series of considerations and alternative criteria from which to structure a project specification; however, the criteria are deliberately conservative and may not be cost effective in some instances. The designer is in the position to determine whether criteria suggested apply to the project under consideration and whether the project environment would allow relaxation of suggested criteria. The selection of test procedures and test limits will be determined by the design philosophy and the design life of the completed structure. For the purposes of these guidelines, a design life of 40 years has been used. For many structures, where replacement of materials is practical, much shorter design life cycles may be appropriate, and lesser criteria may be successfully applied to the armourstone. For structures such as dams, a much longer design life may be required and the criteria will need to be adjusted accordingly. The works specification should specify all the tests and the limits appropriate to the design application; however, a distinction may be made between those requirements used for selection and evaluation of the source material and those requirements used for quality control of product during the execution of a supply contract. It may not be necessary to apply the full range of tests during the execution of the contract. The frequency of testing should be detailed in the works specification.
4  Terms and definitions
For the purposes of this document the terms and definitions given in AS 1141.1, AS 1726, AS 2758.1 and the following apply: 4.1 armourstone rock of sufficient strength and durability for applications requiring material typically ranging in mass from several kilograms to many tonnes Note 1 to entry: Mass and dimensions are dependent on the structure and location or environment of the structure being designed. 4.2 may indicates the existence of an option 4.3 rock durability ability of a rock to retain its physical and mechanical properties while resisting degradation in use through the design life of the structure in which the rock is incorporated 4.4 rock mass defects features in the source rock that will result in splitting or fracturing of the rock during extraction, stockpiling and handling at the quarry, transport, construction handling and placement, or the armourstone in service Note 1 to entry: Such features may include joints, bedding planes, sheared planes, cleavage, foliation and fracturing caused by blasting and handling. Note 2 to entry: It is important to identify existing and potential defects in the quarried rocks. 4.5 rock strength measured breaking stress of a small rock specimen subjected to compressive or tensile forces Note 1 to entry: The measured strength may be affected by small scale rock defects (such as cleavage and jointing) in which case tests may be used to identify the strength of the defect and provide guidance on the strength of the rock mass, including defects. Tests may include, but are not restricted to, compressive strength, Brazil or tensile strength tests, and Triaxial tests. 4.6 should indicates a recommendation 4.7 supply agreement agreement between the aggregate supplier and a second party, that details, among other matters, the test procedures and limits for aggregate supply Note 1 to entry: The agreement may detail sampling requirements and testing frequency. The agreement may be for a specific project or for regular, routine supply. 4.8 works specification body of documents detailing the construction requirements for a works project, which, among many other items, will include specification and supply arrangements for materials, including armourstone, delivered to or produced on site Note 1 to entry: This body of documents may include this document (AS 2758.6), reference to this document, extracts from this document, or this document with included variations.