SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN SOUTH AFRICAN NATIONAL STANDARD Civil engineering test methods Part AS1: Making of asphalt briquettes for Marshall tests and other specialized tests WARNING This document references other documents normatively. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Table of changes Change No. Date Scope Amdt Amended to modify the procedure and calculations. Acknowledgement The SABS Standards Division wishes to acknowledge the valuable assistance of the Committee of Transport Officials (COTO), the Southern African Bitumen Association (SABITA), and the South African National Roads Agency (SANRAL). Foreword This South African standard was approved by National Committee SABS/TC 081/SC 04, Construction materials, products and test methods Road and pavement materials testing, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was approved for publication in February This document supersedes SANS 3001-AS1 (edition 1). A vertical line in the margin shows where the text has been technically modified by amendment No. 1. SANS 3001 consists of various parts under the general title Civil engineering test methods. Parts AS of the SANS 3001 series contain methods for testing asphalt. Introduction This part of SANS 3001 is aimed at the production of briquettes used in a number of tests for the purpose of mixture design and evaluation of field compaction. The procedure is only suitable for mixes having a maximum aggregate size of 20 mm due to the diameter of the Marshall mould. The briquettes may include up to 30 % of reclaimed asphalt. Although the mass and height of the drop for each apparatus and the apparatus set-ups (composition of post, concrete block, bolt tension) are the same within the allowed tolerances, the density achieved in compacted specimens with the same number of blows using different sets of apparatus may differ. It is up to the user to establish a system of calibration between sets of apparatus or laboratories to achieve the same results. Apparatus dimensions that are critical to the outcome of the method or procedure are given with a tolerance. All other dimensions are nominal and should be considered fit for purpose. Existing apparatus that complies with the requirements of TMH 1, with the exception of the compaction pedestal (wooden post and concrete block) and the rate of compaction, may be used until it is no longer fit for purpose. This test method is classified as Group: B, Rating: 4, Activity: AP, in accordance with the requirements of the South African Construction Education and Training Authority (CETA).

3 Contents Page Acknowledgement Foreword Introduction 1 Scope Normative references Definitions Apparatus Preparation of test specimen samples Laboratory mix samples Plant mix samples Mould and hammer preparation Procedure Compaction Removal of the briquette from the mould Calculations Test report Bibliography

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5 Civil engineering test methods Part AS1: Making of asphalt briquettes for Marshall tests and other specialized tests 1 Scope This part of SANS 3001 describes a method for preparing and compacting asphalt briquettes of diameter 101,5 mm and of height 63,5 mm, with a maximum aggregate size of 20 mm. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Information on currently valid national and international standards can be obtained from the SABS Standards Division. 2.1 Standards SANS 1649, Non-automatic self-indicating, semi-self-indicating and non-self-indicating weighing instruments with denominated verification scale intervals. SANS 3001-AG1, Civil engineering test methods Part AG1: Particle size analysis of aggregates by sieving. TG 1, The use of modified bituminous binders in road construction. TMH 5, Sampling methods for road construction materials. TRH 21, Hot-mix recycling. 2.2 Other publications Manual Guidelines for safe and responsible handling of bituminous products. SABITA: Cape Town. 3