AS 2758.2:2021 pdf free download – Aggregates and rock forengineering purposes Part 2: Specification for sealing aggregate

AS 2758.2:2021 pdf free download – Aggregates and rock forengineering purposes Part 2: Specification for sealing aggregate.
This document provides a basis for specifying requirements for aggregates Intended for use in sprayed bituminous surfacing. The requirements relate to quality of rock and other properties of coarse aggregate. A coarse aggregate may be produced from rock, gravel, metallurgical slag or suitable synthetic materials.
This document is intended for use by —
(a) federal, state and local government authorities (whether or not they are specifiers);
(b) consultant engineers (whether specifiers or not);
(c) suppliers and purchasers of asphalt aggregates;
(d) testing authorities;
(e) quality system certifiers and accreditation authorities; and
(1) educational organisations.
2 Normative references
The following documents are referred to in the text in such a way that same or all of their content constitutes requirements of this document.
NOTE Documents referenced for informative purposes arc 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, Met hodsforsampling and testing aggregates. Method 14: Particle shape. by pro port lanai calliper AS 1141.15, Methods [or sampling and testing aggregates, Method 15: Flakiness index
AS 1141.18, Methods forsampling 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 10mm and greater)
AS 1141.20.2, Methods for sampling and testing aggregares Method 20,2: Average least dimension—Direct measurement (nominal SIZeS 5 mm and 7mm)
AS 1141.20.3. Methods far 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
Aggregate to be used for sprayed seal may, at the option of the purchaser, be tested to determine the susceptibility to polishing expressed as the polished aggregate friction value (PAFV) or the polished stone value (PSV). The minimum acceptable PAFV or PSV, or the basis on which the PAFV or PSV will be taken into consideration, should be specified or explained.
NOTE 1 The selection or a satisfactory and available polishing resistant aggregate can be made by comparing the PAFV or PSV data for aggregates from the area of Interest.
NOTE 2 Mandatory PAFV or PSV limits for aggregates are not universally specified, as both the rate of polishing and the acceptable service life of an aggregate are dependent upon several interrelated factors. Such factors include road geometry, environmental conditions, economic life, type, volume and speed of traffic.
Suitable test methods for the determination of PAFV are AS 1141.40, AS 1141.41, and AS 1141.42.