AS 2758.2 pdf download – Aggregates and rock for engineering purposes Part 2: Specification for sealing aggregate
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document.
NOTE Documents referenced for informative purposes are listed in the Bibliography.
AS 1141.3.1, Methods for sampling and testing aggregates, Method 3.1: Sampling—Aggregates
AS 1141.11.1, Methods for sampling and testing aggregates, Method 11.1: Particle size distribution — Sieving method
AS 1141.11.2, Methods for sampling and testing aggregates, Method 11.2: Particle size distribution for vision sizing systems
AS 1141.14, Methods for sampling and testing aggregates, Method 14: Particle shape, by proportional calliper
AS 1141.15, Methods for sampling and testing aggregates, Method 15: Flakiness index
AS 1141.18, Methods for sampling and testing aggregates, Method 18: Crushed particles in coarse aggregate derived from gravel
AS 1141.20.1, Methods for sampling and testing aggregates, Method 20.1: Average least dimension—Direct measurement (nominal size 10 mm and greater)
AS 1141.20.2, Methods for sampling and testing aggregates, Method 20.2: Average least dimension—Direct measurement (nominal sizes 5 mm and 7 mm)
AS 1141.20.3, Methods for sampling and testing aggregates, Method 20.3: Average least dimension—Calculation (nomograph)
AS 1141.22, Methods for sampling and testing aggregates, Method 22: Wet/dry strength variation
AS 1141.23, Methods for sampling and testing aggregates, Method 23: Los Angeles value
AS 2758.0, Aggregates and rock for engineering purposes, Part 0: Definitions and classification
AS ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories 3 Terms and definitions
For the purpose of this document, the terms and definitions in AS 2758.0 apply.
4 Aggregate classification
Aggregate requirements are specified for the following three aggregate classes:
(a) Class A — Premium quality aggregates suitable for freeways, heavily trafficked highways or
pavements carrying a high volume of heavy vehicles.
(b) Class B — Aggregates suitable for highways or main roads carrying medium traffic volumes,medium to lightly trafficked pavements, general parking areas and similar.
(c) Class C — Aggregates suitable for lightly trafficked roads.
NOTE For the purposes of the above classifications—
(a) heavy traffic describes a road with greater than 2 000 vehicles/lane/day;
(b) medium traffic describes a road with greater than 600 but less than 2 000 vehicles/lane/day; and
(c) light traffic describes a road with less than 600 vehicles/lane/day.
Unless it is practical to supply different classes of aggregate to the same project, specifiers should determine the required aggregate class based on the most severe requirements for any road to be sealed under works specification. The works specification should also consider the type of vehicles when nominating any aggregate classification.
5 Sampling Where lot testing is referenced in Tables 1, 2, 3 and 4, a lot shall consist of not less than 5 samples. Sampling of an aggregate shall be carried out in accordance with one of the methods described in AS 1141.3.1.
NOTE 1 The frequency of sampling should be nominated in the works specification or the supply agreement or as agreed with the supplier. In the absence of any of these documents, refer to AS 2758.0:2020 Appendix A for a sampling scheme.
NOTE 2 Reference samples may be taken during the course of supply and retained for later testing.
6 Testing Testing of aggregates shall be carried out in accordance with the relevant requirements of the applicable methods. Laboratories that perform the tests outlined in this document shall meet the requirements of AS ISO/IEC 17025. The testing requirements and specified limits for all sealing aggregates are prescribed in Clauses 5 to 11. NOTE A number of requirements in this document are fundamental and this specification provides a single test method and limits for these properties. Alternative test procedures and limits are presented for the determination of both shape and durability. For these properties, it is recommended that the test procedure and limits that are particular to the geographic area in which the aggregate source is located should be used in specifying supply.
7 Dimensional requirements
7.1 Grading requirements for aggregates When determined in accordance with AS 1141.11.1 or AS 1141.11.2, each lot shall conform to the grading envelopes given in Table 1.