SOUTH AFRICAN NATIONAL STANDARD

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1 ISBN SOUTH AFRICAN NATIONAL STANDARD Civil engineering test methods Part-GR50: Preparation, compaction and curing of specimens of laboratory mixed cementitiously stabilized materials 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 update referenced standards. Acknowledgement The SABS Standards Division wishes to acknowledge the valuable assistance of the Committee of Transport Officials (COTO), and the South African National Roads Agency Limited (SANRAL). Foreword This South African standard was approved by National Committee SABS SC 59E, Construction standards 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 published in April This document supersedes SANS 3001-GR50:2010 (edition 1). A vertical line in the margin shows where the text has been technically modified by amendment No. 1. SANS 3001 consists of different parts under the general title Civil engineering test methods. Parts GR of the SANS 3001 series contain methods for testing gravels, sands and soils. Annex A forms an integral part of this document. Annexes B and C are for information only.

3 Introduction This part of SANS 3001 is used to prepare, compact and cure cylindrical specimens of cementitiously stabilized materials in the laboratory. The method is based on the South African TMH1 series used over the last 50 years. These specimens are commonly used in determining the unconfined compressive strength and indirect tensile strength of stabilized materials, and can be used in other test methods, such as for wet/dry durability testing. 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 conforms to the requirements of TMH1 may be used in this method until it is no longer fit for purpose. This part of SANS 3001 forms part of a set of tests for stabilized materials which include the following: a) laboratory mixed maximum dry density (see SANS 3001-GR 31); b) preparation, compaction and curing of test specimens, laboratory mixed (see SANS 3001-GR50); c) preparation, compaction and curing of test specimens, field mixed (including maximum dry density) (see SANS 3001-GR51); d) preparation of field cores (see SANS 3001-GR52); e) unconfined compressive strength (see SANS 3001-GR53); and f) indirect tensile strength (see SANS 3001-GR54). This part of SANS 3001 is classified as Group: B, Rating: 4, Activity: GR, in accordance with the requirements of the South African Construction Education and training Authority (CETA). 1

4 Contents Page Acknowledgement Foreword Introduction 1 Scope Normative references Definitions Apparatus Test sample preparation Procedure Calculations Test report Annex A (normative) Calculation of the compaction mould factor by determining the volume Annex B (informative) Test flow chart Annex C (informative) Example of the calculation method Bibliography

5 Civil engineering test methods Part-GR50: Preparation, compaction and curing of specimens of laboratory mixed cementitiously stabilized materials 1 Scope This part of SANS 3001 applies to cementitiously stabilized material (crushed stone, gravel, sand and soil) and describes a method to prepare, compact and cure cylindrical specimens in the laboratory suitable for strength and durability tests. 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. SANS 241-1, Drinking water Part 1: Microbiological, physical, aesthetic and chemical determinands. Amdt 1 SANS 241-2, Drinking water Part 2: Application of SANS Amdt 1 SANS 1649, Non-automatic self-indicating, semi-self-indicating and non-self-indicating weighing instruments with denominated verification scale intervals. SANS 3001-GR20, Civil engineering test methods Part GR20: Determination of moisture content by oven-drying. SANS 3001-GR30, Civil engineering test methods Part GR30: Determination of the maximum dry density and optimum moisture content. SANS 3001-GR31, Civil engineering test methods Part GR31: Determination of the maximum dry density and optimum moisture content of cementitiously stabilized materials. SANS /ISO , Test sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth. SANS /ISO , Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plate. TMH5, Sampling methods for road construction materials. 3