BS EN 196-6:2018:2019 Edition
$102.76
Methods of testing cement – Determination of fineness
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 20 |
This European Standard describes three methods of determining the fineness of cement. The sieving method serves only to demonstrate the presence of coarse cement particles. This method is primarily suited to checking and controlling the production process. The air-jet sieving method measures the retention on sieving and is suitable for particles which substantially pass a 2,0 mm test sieve. It may be used to determine the particle size distribution of agglomerates of very fine particles. This method may be used with test sieves in a range of aperture sizes, e.g. 63 ?m and 90 ?m. The air permeability method (Blaine) measures the specific surface area (mass related surface area) by comparison with a reference material sample. The determination of the specific surface area serves primarily to check the consistency of the grinding process of one and the same plant. This method only enables a limited assessment of the properties of the cement in use. NOTE The air permeability method may not give significant results for cements containing ultrafine materials. The methods are applicable to all the cements defined in EN 197.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | 1 Scope 2 Normative references 3 Sieving method 3.1 Principle 3.2 Apparatus |
| 7 | 3.3 Material for checking the sieve 3.4 Procedure 3.4.1 Determination of the cement residue 3.4.2 Checking the sieve |
| 8 | 3.5 Expression of results 4 Air permeability method (Blaine method) 4.1 Principle 4.2 Apparatus |
| 10 | 4.3 Materials 4.4 Test conditions |
| 11 | 4.5 Compacted cement bed 4.5.1 Basis 4.5.2 Preparation of the sample 4.5.3 Determination of density 4.5.4 Formation of the bed |
| 12 | 4.6 Air permeability test 4.6.1 Basis 4.6.2 Procedure |
| 13 | 4.7 Calibration of apparatus 4.7.1 Determination of the bed volume by measurement 4.7.1.1 Apparatus 4.7.1.2 Procedure 4.7.2 Determination of the apparatus constant |
| 14 | 4.7.3 Recalibration 4.8 Special cements |
| 15 | 4.9 Simplification of the calculations 4.9.1 Basic formula 4.9.2 Effect of specified porosity 4.9.3 Effect of controlled temperature |
| 16 | 4.9.4 Effect of density of cement 4.10 Expression of results |
| 17 | 5 Air-jet sieving method 5.1 Principle 5.2 Apparatus |
| 18 | 5.3 Procedure |
| 19 | 5.4 Checking the sieve 5.5 Expression of results 5.6 Repeatability and reproducibility |
