Aggregates for Concrete - CEDD

1 The Government of the Hong Kong Special Administrative RegionAggregates for ConcreteCS3:2013 Construction Standard Construction Standard CS3:2013 (This Version is continuously updated to include Amendments issued) This Electronic File has incorporated the following Amendments:- Rev Issue Date Amendment Incorporated First Issue May 2013 - 1 21 October 2013 Amendment No. 1/2013 2 25 January 2016 Amendment No. 1/2016 This electronic file is for reference only. When the content of this electronic file is inconsistent with the hard copy of the CS3:2013 and the Amendments issued, the hard copy of the CS3:2013 and the Amendments shall prevail. Construction Standard CS3:2013 Aggregates for Concrete The Government of the Hong Kong Special Administrative Region CS3:2013 2 The Government of the Hong Kong Special Administrative Region CS3:2013 was published under the authority of the Standing Committee on Concrete Technology (SCCT) in May 2013.

2 Prepared by: The Working Group on Drafting of CS3 under SCCT. The members of the Working Group are as follows: Department Post Civil Engineering and Development Department Senior Engineer Concrete /Lab (Chairman) Engineer 2/Lab 2 Chemist Principal Technical Officer/Lab 2 Architectural Services Department Senior Structural Engineer/301 Buildings Department Technical Secretary/Structural Drainage Services Department Senior Engineer/Quality Assurance Highways Department Senior Engineer/General (Urban) Engineer/General (NTW) Housing Department Senior Structural Engineer/18 Structural Engineer/Lab 7 Innovation and Technology Commission Senior Accreditation Officer (3)/HK Accreditation Services Water Supplies Department Senior Engineer/Design (2)

3 Any comments on the contents of this Construction Standard could be addressed to: The Secretary of the Standing Committee on Concrete Technology Civil Engineering and Development Department, 101 Princess Margaret Road, Homantin, Kowloon. This publication is available or can be ordered from: The sales counter at the Publications Sales Unit of the Information Services Department (ISD) at Room 626, 6/F, North Point Government Offices, 333 Java Road, North Point, Hong Kong; The online Government Bookstore at ; By fax at 2523 7195 or online after downloading the order form from the ISD website at ; or By e-mail to ISD at CS3:2013 3 FOREWORD Introduction This Construction Standard has been prepared by the Working Group on Drafting of Construction Standard CS3 under the Standing Committee on Concrete Technology, Development Bureau, the Government of the Hong Kong Special Administrative Region.

4 It provides a standard for Aggregates obtained from natural sources for Concrete production in Hong Kong. It also contains requirements for recycled Aggregates which are suitable for production of some prescribed mix Concrete and designed mix Concrete . The drafting of this Construction Standard has made reference to the following British Standards (BS), European Standards adopted as British Standards (BS EN), publication of BRE, National Standard of the People s Republic of China (GB), publication from International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM, from its French name, R union Internationale des Laboratoires et Experts des Materiaux, syst mes de construction et ouvrages) and ASTM International Standards, with modifications to suit local conditions and practices.

5 BS 812: Part 2:1995 BS 812: Part 100:1990 BS 812: Part 102:1989 BS 812: Section :1985 BS 812: Section :1989 BS 812: Section :1990 BS 812: Part 109:1990 BS 812: Part 111:1990 BS 812: Part 112:1990 BS 812: Part 117:1988 BS 812: Part 118:1988 BS 812: Part 120:1989 BS 812: Part 121:1989 BS 882:1992, incorporating Amendment no. 1 BS 1881: Part 124:1988 BS 7943:1999 BS EN 196-1:2005 BS EN 932-5:2000 BS EN 933-9:2009 BS EN 1015-4:1999 BS EN 1015-11:1999, incorporating amendment no. 1 BS EN 12620:2002+A1:2008, incorporating Corrigendum May 2004 BS EN 1744-1:2009 BRE Digest 433 GB/T 14684-2011 RILEM AAR-1 ASTM C131-06 ASTM C294-12 ASTM C295-08 CS3:2013 4 The permission of the following institutions to reproduce its publications is gratefully acknowledged: Permission from British Standards Institution Permission to reproduce extracts from British Standards is granted by BSI Standards Limited (BSI).

6 No other use of this material is permitted. British Standards can be obtained in PDF or hard copy formats from the BSI online shop: or by contacting BSI Customer Services for hard copies only: Tel: +44 (0)20 8996 9001, Email: Permission from ASTM International Adapted, with permission, from C131-06 Standard Test Method for Resistance to Degradation of Small-Size Coarse aggregate by Abrasion and Impact in the Los Angeles Machine, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the complete ASTM standard may be obtained from ASTM, The contribution from the following organisations on the drafting of the Construction Standard is gratefully acknowledged: The Concrete Producers Association of Hong Kong Ltd.

7 The Hong Kong Contract Quarry Association The Institute of Quarrying (Hong Kong Branch) The Import Aggregates Suppliers Association Ltd. The Association of Construction Materials Laboratories Ltd. The University of Hong Kong The electronic files of this Construction Standard including amendments, if any, can be found on the website of the Civil Engineering and Development Department. May 2013 CS3:2013 5 CONTENTS Page FOREWORD .. 3 CONTENTS .. 5 LIST OF TABLES .. 10 LIST OF FIGURES .. 11 SECTION 1 SCOPE .. 13 SECTION 2 TERMS AND DEFINITIONS .. 14 aggregate .. 14 Natural aggregate .. 14 Recycled aggregate .. 14 Coarse aggregate .. 14 Fine aggregate .. 14 Fines .. 14 Grading.

8 14 Test sieve .. 14 Constant dry mass .. 14 SPECIFICATION SECTION 3 GEOMETRICAL REQUIREMENTS .. 16 General .. 16 Grading .. 16 Shape of coarse aggregate .. 17 Shell content .. 17 Fines content .. 17 Foreign materials content in coarse recycled aggregate .. 18 SECTION 4 PHYSICAL 19 General .. 19 Resistance to fragmentation .. 19 Particle density and water absorption .. 19 Durability .. 19 SECTION 5 CHEMICAL REQUIREMENTS .. 21 General .. 21 Chlorides .. 21 Sulphur containing compounds .. 22 Other constituents .. 22 SECTION 6 QUALITY CONTROL .. 23 General .. 23 Routine control .. 23 Control under a third party product certification system .. 25 CS3:2013 6 GENERAL TESTING REQUIREMENTS SECTION 7 GENERAL REQUIREMENTS FOR COMMON EQUIPMENT AND CALIBRATION.

9 27 Scope .. 27 Abbreviation for units .. 27 Tolerances .. 27 Test apparatus .. 28 Laboratory reference standards for calibration .. 30 Calibration and checking of test equipment .. 31 Reagents .. 36 SECTION 8 METHODS FOR SAMPLING .. 37 Scope .. 37 Definitions .. 37 Principle .. 38 Apparatus .. 38 Procedure for sampling .. 39 Procedure for sample reduction .. 40 Dispatch of sample .. 41 Certificate of sampling .. 42 PETROGRAPHIC EXAMINATION SECTION 9 METHOD FOR PETROGRAPHIC EXAMINATION OF Aggregates .. 43 Scope .. 43 Principle .. 43 43 Apparatus .. 44 Method .. 44 Preparation of test 45 Procedure .. 45 Test report .. 49 TESTS FOR GEOMETRICAL PROPERTIES SECTION 10 METHODS FOR DETERMINATION OF PARTICLE SIZE DISTRIBUTION - SIEVE TESTS.

10 51 Scope .. 51 Principle .. 51 51 Apparatus .. 51 Preparation of test portion .. 52 Procedure .. 53 Calculation and expression of results .. 56 Test report .. 56 SECTION 11 METHOD FOR DETERMINATION OF FLAKINESS INDEX .. 57 Scope .. 57 Principle .. 57 57 Apparatus .. 57 Preparation of test portion .. 58 Procedure .. 58 Calculation and expression of results .. 60 CS3:2013 7 Test report .. 60 SECTION 12 METHOD FOR DETERMINATION OF ELONGATION INDEX .. 61 Scope .. 61 Principle .. 61 61 Apparatus .. 61 Preparation of test 62 Procedure .. 62 Calculation and expression of results .. 63 Test report .. 64 SECTION 13 METHOD FOR DETERMINATION OF METHYLENE BLUE VALUE.