AS 2758.5 pdf download
AS 2758.5 pdf download.Aggregates and rock for engineering purposes
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 1141.6.1, Methods for sampling and testing aggregates, Method 6.1: Particle density and water absorption of coarse aggregate— Weighing-in-water method AS 1141.6.2, Methods for sampling and testing aggregates, Method 6.2: Particle density and water absorption of coarse aggregate— Pycnometer method 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 1141.12, Methods for sampling and testing aggregates, Method 12: Materials finer than 75 µm in aggregates (by washing) 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 1141.22, 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 1141.24, Methods for sampling and testing aggregates, Method 24: Aggregate soundness—Evaluation by exposure to sodium sulfate solution AS 1141.30.1, Methods for sampling and testing aggregates, Method 30.1: Coarse aggregate quality by visual comparison AS 1141.32, Methods for sampling and testing aggregates, Method 32: Weak particles (including clay lumps, soft and friable particles) in coarse aggregates 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 AASHTO T 304, Standard method of test for uncompacted void content of fine aggregate
5 Testing
Testing of aggregates shall be carried out in accordance with the relevant requirements of the applicable method. 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 asphalt aggregates are prescribed in Clauses 4 to 10. 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.
6 Dimensional requirements
6.1 Particle size distribution requirements for aggregate Particle size distribution test results in accordance with AS 1141.11.1, AS 1141.11.2 or AS 1141.12 (as appropriate) shall be provided to indicate the average grading of the aggregate proposed for supply. This shall be known as the nominated grading. When required, a representative sample, the grading of which shall be the basis for acceptance of the quotation, tender or source of supply shall be provided. The grading of this sample shall be known as the nominated grading. For each aggregate, the allowable tolerances for the supply of the nominated grading shall conform to the tolerances shown in Table 1.6.2 Particle shape of coarse aggregate The shape of aggregate particles shall be determined by one of the following methods: (a) Particle shape — When determined in accordance with AS 1141.14, the proportion of misshapen particles in the fraction of coarse aggregate retained on the 9.5 mm test sieve, using a 3:1 ratio, shall not exceed 10 % and using a 2:1 ratio shall not exceed 35 %. (b) Flakiness index — When determined in accordance with AS 1141.15, the flakiness index of coarse aggregate shall not exceed 35 %. 6.3 Crushed particles of coarse aggregate When determined in accordance with AS 1141.18, coarse aggregate that is derived from gravels or conglomerates shall consist of at least 75 % by mass of particles with at least two crushed faces. NOTE With the exclusion of quarries in hard conglomerates, coarse aggregates derived from a hard rock quarrying process where all particles are crushed do not require testing. 6.4 Shape of fine aggregate used in stone mastic asphalt When determined in accordance with AASHTO T 304 Method A, the angularity of fine aggregate used in stone mastic asphalt shall be equal to or greater than 43 %. Stone mastic asphalt is defined as a gap graded wearing course mix with a high proportion of coarse aggregate that interlocks to form a skeletal structure which is bound with a mastic mortar.
