This part of EN 196 describes the method for the determination of the compressive and, optionally, the flexural strength of cement mortar. The method applies to common cements and to other cements and materials, the standards for which call up this method. It may not apply to other cement types that have, for example, a very short initial setting time. The method is used for assessing whether the compressive strength of cement is in conformity with its specification and for validation testing of a CEN Standard sand, EN 196 1, or alternative compaction equipment. This part of EN 196 describes the reference equipment and procedure and allows alternative compaction equipment and procedures to be used provided that they have been validated in accordance with the appropriate provisions in this document. In the event of a dispute, only the reference equipment and procedure are used.<\/p>\n
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| 48<\/td>\n | Contents Page <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 1 Scope 2 Normative references 3 Principle <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | 4 Laboratory and equipment 4.1 Laboratory 4.2 General requirements for the equipment <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | 4.3 Test sieves Table 1 \u2014 Aperture of test sieves 4.4 Mixer Table 2 \u2014 Speeds of mixer blade <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | Figure 1 \u2014 Typical bowl and blade 4.5 Moulds <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | Figure 2 \u2014 Typical mould <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Figure 3 \u2014 Typical spreaders and metal straightedge 4.6 Jolting apparatus <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | Figure 4 \u2014 Typical jolting apparatus 4.7 Flexural strength testing apparatus <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Figure 5 \u2014 Arrangement of loading for determination of flexural strength 4.8 Compressive strength testing machine <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | 4.9 Jig for compressive strength testing machine 4.10 Balance 4.11 Timer <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | Figure 6 \u2014 Typical jig for compressive strength testing 5 Mortar constituents 5.1 Sand 5.1.1 General <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 5.1.2 CEN Reference sand Table 3 \u2014 Particle size distribution of the CEN Reference sand 5.1.3 CEN Standard sand 5.2 Cement 5.3 Water <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | 6 Preparation of mortar 6.1 Composition of mortar 6.2 Mixing of mortar 7 Preparation of test specimens 7.1 Size of specimens 7.2 Moulding of test specimens <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | 8 Conditioning of test specimens 8.1 Handling and storage before demoulding 8.2 Demoulding of specimens 8.3 Curing of specimens in water <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | 8.4 Age of specimens for strength tests 9 Testing procedures 9.1 Flexural strength 9.2 Compressive strength <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | 10 Results 10.1 Flexural strength 10.1.1 Calculation and expression of test results 10.1.2 Reporting of results 10.2 Compressive strength 10.2.1 Calculation and expression of test results 10.2.2 Reporting of results <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | 10.2.3 Estimates of the precision of the method for compressive strength 10.2.3.1 Short-term repeatability 10.2.3.2 Long-term repeatability 10.2.3.3 Reproducibility <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | 11 Validation testing of CEN Standard sand and of alternative compaction equipment 11.1 General 11.2 Validation testing of CEN Standard sand 11.2.1 Principle 11.2.2 Certification testing of CEN Standard sand 11.2.2.1 Initial certification testing <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | 11.2.2.2 Annual confirmation testing 11.2.3 Method of certification testing 11.2.3.1 Procedure 11.2.3.2 Calculation and expression of results <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | 11.2.3.3 Requirements 11.2.4 Verification testing of CEN Standard sand <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | 11.2.5 Method of verification testing of CEN Standard sand 11.2.5.1 Procedure 11.2.5.2 Calculation and expression of results 11.2.5.3 Requirements 11.3 Validation testing of alternative compaction equipment 11.3.1 General requirements <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | 11.3.2 Method of testing of alternative compaction equipment 11.3.2.1 Procedure 11.3.2.2 Calculation and expression of results <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | 11.3.2.3 Requirements <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | Annex A (normative) Alternative vibration compaction equipment and procedures validated as equivalent to the reference jolting compaction equipment and procedure A.1 General A.2 Vibrating table, A A.2.1 Technical description <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | A.2.2 Compaction procedure using vibrating table, A Figure A.1 \u2014 Schematic of typical vibrating table, type A <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | A.3 Vibrating table, B A.3.1 Technical description <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | A.3.2 Compaction procedure using vibrating table, B Figure A.2 \u2014 Schematic of typical vibrating table, type B <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Methods of testing cement – Determination of strength<\/b><\/p>\n |