TRINIDAD AND TOBAGO STANDARD

Transcription

1 TRINIDAD AND TOBAGO STANDARD SPECIFICATION FOR CEMENT PCTTS/CRS 54:20XX (Replaces TTS 584-1:2002, TTS 584-2:2002 and respective amendments) This Trinidad and Tobago Standard is an adoption of CRS 54:2014, Specification for cement, which is copyright protected by the Caribbean Regional Organization for Standards and Quality Copyright This National Standard is issued by the Trinidad and Tobago Bureau of Standards is copyright protected by the Standards Act No. 18 of 1997 and neither this document nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permission being secured from the Trinidad and Tobago Bureau of Standards. Request for permission to reproduce should be addressed as follows: Executive Director Trinidad and Tobago Bureau of Standards Century Drive, Trincity Industrial Estate, Macoya, Tunapuna, P.O. Box 467, Port of Spain Trinidad and Tobago Phone: 662-TTBS ttbs@ttbs.org.tt Reproduction may be subject to royalty payments or a licensing agreement.

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3 General statement The Trinidad and Tobago Bureau of Standards (the Bureau) is a body corporate established under the authority of the Standards Act No. 18 of 1997 (herein after referred to as the Standards Act). In accordance with the Standards Act, the Bureau shall promote and encourage the development and maintenance of standards and further shall establish standards for the following: to improve goods produced or used in Trinidad and Tobago; to ensure industrial efficiency and development; to promote public and industrial welfare, health and safety; and to protect the environment. The Bureau develops standards through consultation with relevant interest groups, and public comment is invited on all draft standards before they are declared as Trinidad and Tobago Standards in accordance with the provisions of the Standards Act. All standards are declared with voluntary status and are enacted via a Legal Notice in the Trinidad and Tobago Gazette. A specification (including a code of practice) becomes a standard when declared as such by the Bureau, under Section 16 of the Standards Act. Trinidad and Tobago Standards are formulated by one of the following methods: - full adoption - of an international standard or an appropriate standard from another country; - modified adoption - of an international standard or an appropriate standard from another country; or - development of a new document - based on technical and market research. Where adoptions or modified adoptions are required, permission is obtained from the copyright holders of the original standard to effect such adoptions, normally with an appropriate acknowledgement given on the cover page. In such cases, the national standard is given a number prefixed by acronyms representing a Trinidad and Tobago Standard (TTS) and that of the parent organization (such as International Organization for Standardization (ISO)), e.g. TTS/ISO. Once the relevant levels of permission are granted, full adoption or modified adoption may be effected through either: - the cover page method in which preliminary pages containing national information and deviations are attached to the parent standard (in its original printed form); or - the reproduction method in which preliminary pages containing national information are attached to the content of parent standard modified (electronically) for national application. NOTE In order to keep abreast of progress in the industries concerned, Trinidad and Tobago Standards are subject to periodic review. Suggestions for improvements are welcome. iii

4 Committee The Committee responsible for the formulation of this Trinidad and Tobago Standard is as follows: SPECIFICATION COMMITTEE FOR CEMENT* Members Representing Dr Lebert Grierson (Chairperson) Department of Chemistry, Faculty of Science and Agriculture, University of the West Indies, St Augustine Campus Mr Suresh Ramdhanie Mr Sanish Maharaj Mr Stephen Bachan Mr Wayne Benjamin Mr Harriram Jairam Mr Nari Boris Mr Victor Sooknarine Mr Kester Siewlal Caribbean Industrial Research Institute Readymix (WI) Ltd Trinidad Cement Ltd Etercnoc Ltd Consumer Affairs Division, Ministry of Trade, Industry, Investment and Communications of the Republic of Trinidad and Tobago, Harricrete Ltd Laboratory Services Division, Trinidad and Tobago Bureau of Standard Mr Darryl Thomson (Technical Secretary) Standardization Division, Trinidad and Tobago Bureau of Standards *This Specification Committee also served as the CROSQ Regional Technical Sub-Committee which was responsible for the development of the CARICOM standard CRS 54:2014, Specification for cement. iv

5 Contents Foreword Scope Normative references Terms and definitions Cement designation Requirements Compliance... 8 Annex A (informative) Sampling frequencies for third-party certification Tables Table 1 Cement designation... 4 Table 2 Technical requirements for cement... 6 Table A.1 Sampling frequencies for third-party certification v

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7 Foreword This specification was declared a Trinidad and Tobago standard on, after the draft, finalized by the Specification Committee for Cement, had been approved by the Bureau. The Committee has recommended that this standard be declared compulsory in order to protect public health, welfare and safety from structural failure in buildings which may be caused by defective cement used in construction. This standard will be effective as a compulsory standard on a date to be notified by the Minister responsible for trade and industry in a Notice to be published in the Trinidad and Tobago Gazette, as required by the Standards Act. This standard replaces the following standards along with thier respective amendments which will all be withdrawn when this standard is declared : TTS 584: Part 1: 2002, Portland cement Ordinary and rapid hardening Specification, TTS 584: Part 1: 2002/Amendment(2010), Portland cement Ordinary and rapid hardening Specification, TTS 584: Part 2: 2002, Portland cement Ordinary and rapid hardening Chemical test methods, and TTS 584: Part 2: 2002/Amendment (2007), Portland cement Ordinary and rapid hardening Chemical test methods. This standard is a full adoption of the Caribbean Regional Organization for Standards and Quality (CROSQ) standard CRS 54:2014, Specification for cement. Acknowledgement is hereby given to the CROSQ for granting permission to adopt the technical content of CRS 54:2014. CRS 54:2014 was developed by the CROSQ Regional Technical Sub-Committee for Construction Products held by Trinidad and Tobago and which comprised the same members as the national Specification Committee for Cement., This standard is intended for use by manufacturers, importers and distributors of cement. It is also intended to provide engineers and other users with the expected performance requirements of cements covered by this standard. The standard is based mainly on ASTM C150M Standard Specification for Portland Cement, ASTM C595M Standard Specification for blended hydraulic cements, ASTM C1157M Standard Performance Specification for Hydraulic Cement and EN Cement Part 1: Composition, specifications and conformity criteria for common cements. Due to differing cement standards in use within the region, this standard adopts an approach that would address cements conforming to ASTM C150M, ASTM C595M, ASTM C1157M and EN requirements. This standard specifies requirements for fifteen types of cement derived from standards from United States and European Union; these cement types, which are not exhaustive, are considered to be the most widely used hydraulic cement types used by the construction industry within the Caribbean region. 1

8 PC/TTS/CRS 54:20XX In formulating this Standard considerable assistance was derived from the following standards: ASTM C150/150M, Standard Specification for Portland Cement; ASTM C595/C595M, Standard Specification for Blended Hydraulic Cement, ASTM C1157/C1157M, Standard Performance Specification for Hydraulic Cement, and EN 197-1, Cement Part 1: Composition, specifications and conformity criteria for common cements. 2

9 1 Scope This standard specifies requirements for hydraulic cements used primarily in the construction industry. It includes requirements for compressive strength, physical properties, chemical properties, packaging, labelling and the means of determining compliance to these requirements. This standard applies to Portland and blended cement. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For all undated references, the latest edition of the normative documents apply. ASTM C219, Terminology Relating to Hydraulic Cement ASTM C150/150M, Standard Specification for Portland Cement ASTM C595/595M, Standard Specification for Blended Hydraulic Cements ASTM C1157/C1157M, Standard Performance Specification for Hydraulic Cement CRS 55, Labelling of goods General principles EN 197-1, Cement Part 1: Composition, specifications and conformity criteria for common cements ISO , Sampling procedures for inspection by attributes -- Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 3 Terms and definitions Terms and definitions in EN and ASTM C219 shall apply in addition to the following: 3.1 National Competent Authority state agency or institution with responsibility for market surveillance of construction products 4 Cement designation Cements shall be designated in accordance with Table 1. 3

10 PC/TTS/CRS 54:20XX Designation Table 1 Cement designation Classified in accordance with Type I Type II Type III ASTM C150M, clause 6 Type IV Type V Type IS Type IP Type IL ASTM C595M, clause 4 Type IT Type GU Type HE Type MS Type HS ASTM C1157, clause 6 Type MH Type LH CEM I CEM II CEM III EN 197-1, Table 1 CEM IV CEM V NOTE 1 Blended cements have been shown to be more effective than ASTM C150 type IV cement and as such the Type IV has not found widespread application. This standard therefore does not include the ASTM C150 Type IV; where cement with a low heat of hydration is required, the standard makes provision for the use of the ASTM C1157 LH type NOTE 2 V. The CEM types include all the sub-classes of CEM II, CEM III, CEM IV and CEM 4

11 5 Requirements 5.1 General Cements shall comply with the applicable technical requirements of Table All cements shall satisfy the packaging and labelling requirements of

12 PC/TTS/CRS 54:20XX Table 2 Technical requirements for cement Cement designation Reference standard for technical requirements Type I Type II Type III ASTM C150M, Standard Specification for Portland Cement Type IV Type V Type IP Type IS Type IT ASTM C595M, Standard Specification for Blended Hydraulic Cements Type IL Type GU Type HE Type MS Type HS Type MH ASTM C1157, Standard Performance Specification for Hydraulic Cement Type LH CEM I CEM II CEM III CEM IV EN 197-1, Cement Part 1: Composition, specifications and conformity criteria for common cements CEM V NOTE 1 Blended cements have been shown to be more effective than ASTM C150 type IV cement and as such the Type IV has not found widespread application. This standard therefore does not include the ASTM C150 Type IV; where cement with a low heat of hydration is required, the standard makes provision for the use of the ASTM C1157 LH type NOTE 2 The CEM types include all the sub-classes of CEM II, CEM III, CEM IV and CEM V. 6

13 5.2 Packaging and labelling Packaged cement Requirements for packages When packaged, cement shall be packed in bags, made of gunny, multi-ply paper, polypropylene or cloth Labelling requirements Each bag of cement shall meet the general labelling requirements in CRS 55, Labelling of goods General principles and shall include the following information: a) cement type; b) brand or trade name or trademark; c) net quantity, stated in kilograms; d) name and address of the manufacturer, seller or distributor; e) country of origin; and f) packing date or code. NOTE It is recommended that labels also provide guidance on safety precautions including suitable warnings about the release of alkali when cement is mixed with water, preventing skin contact with wet cement and preventing dry cement from entering the eyes, nose or mouth Requirements for mass tolerances Individual bags of cement shall contain no less than 98% of the mass stated on the packaging The average mass of a sample of bags taken in accordance with ISO , inspection level I shall be no less than the mass stated on the package Bulk cement shipments The following specific information shall be included in shipping documentation: a) cement type; b) brand or trade name or trademark; c) net quantity, stated in tons; d) name and address of the manufacturer, seller or distributor; 7

14 PC/TTS/CRS 54:20XX e) country of origin; and f) packing date or code. 6 Compliance 6.1 Compliance Cement which conforms to the technical requirements of ASTM C150M, ASTM C595M, ASTM C1157M or EN197-1, as well as the labelling and packaging requirements of 5.2 conforms to this standard Packaged cement, submitted for consideration, shall be assessed in accordance with 6.2, 6.3 and 6.4. If such cement satisfies the National Competent Authority that it complies with all the relevant requirements contained in 6.2, 6.3 and 6.4, the cement shall be deemed to fully comply with this standard Bulk cement, is not subject to the provision of 6.3, but shall be assessed in accordance with 6.2 and 6.4. If bulk cement satisfies the National Competent Authority that it complies with the relevant requirements contained in 6.2 and 6.4, the cement shall be deemed to fully comply with this standard Sampling plans and sampling frequencies shall be at the discretion of the National Competent Authority. NOTE Annex A is an informative annex which provides guidance on sampling plans for continuous production which can be used with this standard. 6.2 Assessment of labelling and shipping information requirements Labelling information Bags of cement shall satisfy the labelling requirements of clause when assessed Bulk shipments of cement shall be accompanied by manufacturer s or supplier s documentation satisfying the requirements Verification of mass Bags of cement shall satisfy the requirements of mass tolerance specified in NOTE If bags of cement do not comply with the requirements of clauses , and and the National Competent Authority determines that the cement can be suitably repackaged or relabelled; the vendor may be provided with the opportunity to do so and to resubmit the repackaged or relabelled cement for a second assessment and determination. 8

15 6.4 Assessment of compressive strength, physical and chemical requirements Cement labelled with a product certification mark Cement accompanied by a product certification mark issued by a Certification body shall be deemed to fully comply with this standard provided that the National Competent Authority is satisfied of the following: a) The product certification body has been accredited in accordance with ISO or is acceptable to the National Competent Authority, b) The product certification mark appears on all bags of cement, and c) The product certification scheme has been verified to cover the type of cement under consideration and covers the production period for the cement under consideration Cement accompanied by a test certificate Test certificates which claim to demonstrate compliance of the cement to the technical requirements of this standard may be accepted as evidence of compliance to these requirements, provided that the National Competent Authority is satisfied with the following: a) The testing laboratory is accredited to ISO in relation to the tests to be performed, or is acceptable to the National Competent Authority; b) The sample of cement tested can be clearly traced to the batch of cement under consideration; and c) A separate test certificate is available for each discrete batch or lot under consideration Cement without a certification mark or test certificate Where discrete lots, batches or shipments of cement are presented for consideration, the cement type shall be taken as stated on the label or shipping documentation The cement shall be sampled by the National Competent Authority and tested in accordance with the requirements for that cement designation as specified in Table 2. 9

16 PC/TTS/CRS 54:20XX Annex A (informative) Sampling frequencies for third-party certification The sampling frequencies outlined in Table A.1 are to be used by third-party verification bodies which are responsible for assessing or certifying compliance of cement to either the ASTM or EN requirements. The frequency of testing is based on one of two scenarios which apply to continuous production in a manufacturing plant. The sampling plans outlined in Table A.1 are based on EN 197-2, Cement Conformity evaluation. Case 1 - Sampling from a continuous production process with a factory production quality control system; and Case 2 - Sampling from a continuous production process with Quality Management System in place. NOTE In general, the more rigorous the quality management system employed in the manufacturing plant, the greater the confidence that the product quality will remain consistent over time; this allows for reduced frequency of sampling and testing where the product is initially shown to meet the requirements of the standard. Table A.1 Sampling frequencies for third-party certification Case Case 1 Continuous production process with adequate factory production control records Sampling frequency 9 samples/year for normal sampling; and 6 samples/year for reduced sampling Remarks The sampling plan is based on the Type 4 Scheme of ISO/IEC The method of conformity assessment will normally include an assessment of product quality and related quality control process Case 2 Continuous production process with and adequate Quality Management System in place 6 samples/year for normal sampling; and 4 samples/year for reduced sampling The sampling plan is based on the Type 5 Scheme of ISO/IEC The method of conformity assessment will normally include an assessment of product quality and the elements of the quality management system. Normal sampling frequency shall typically apply. In the event that no sample fails (allowing for retesting, if necessary) within a continuous 12-month period, a reduced sampling frequency (as outlined in Table A.1) may be applied. In the event that a non-conforming sample has been identified under reduced sampling frequency, the sampling frequency shall immediately and automatically revert to normal sampling. 10