BS EN 1097-2:2020
$189.07
Tests for mechanical and physical properties of aggregates – Methods for the determination of resistance to fragmentation
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 46 |
This document describes the reference method, the Los Angeles test, used for type testing and in case of dispute (and an alternative method, the impact test) for determining the resistance to fragmentation of coarse aggregates (main text) and aggregates for railway ballast (Annex A). For other purposes, in particular factory production control, other methods are possible provided that an appropriate working relationship with the reference method has been established.
This document applies to natural, manufactured or recycled aggregates used in building and civil engineering.
Annex A describes a method for the determination of resistance to fragmentation of aggregates for railway ballast.
Annex B gives alternative narrow range classifications for the Los Angeles test and the impact test.
Annex C contains construction, operation and safety requirements for the impact tester.
Annex D describes a method for checking of the impact tester.
Annex E gives precision data.
Annex F contains a worked example of calculation of impact value SZ.
Annex G gives an alternative narrow range classification for the Los Angeles test of 16/32 mm recycled aggregates.
Annex H proposes an additional sieve for the evaluation of the Los Angeles test for railway ballast.
Annex A is normative and Annexes B to H are informative.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 10 | 4.2 Additional apparatus required for determination of resistance to fragmentation by the Los Angeles test method |
| 12 | 4.3 Additional apparatus required for determination of resistance to fragmentation by the impact test method 5.1 Principle 5.2 Preparation of test portion |
| 13 | 5.3 Test procedure 5.4 Calculation and expression of results |
| 14 | 5.5 Test report 5.5.1 Required data 5.5.2 Optional data 6.1 Principle 6.2 Preparation of test specimens |
| 15 | 6.3 Test procedure 6.4 Calculation and expression of results |
| 16 | 6.5 Test report 6.5.1 Required data 6.5.2 Optional data |
| 17 | Annex A (normative)Determination of resistance to fragmentationof aggregates for railway ballast A.1 Apparatus A.1.2 Additional apparatus required for the determination of resistance to fragmentation by the Los Angeles test method |
| 19 | A.1.3 Additional apparatus required for the determination of resistance to fragmentation by the impact test method A.2 Determination of resistance to fragmentation by the Los Angeles test method A.2.1 Principle A.2.2 Preparation of test portion |
| 20 | A.2.3 Test procedure A.2.4 Calculation and expression of results A.2.5 Test report A.2.5.1 Required data |
| 21 | A.2.5.2 Optional data A.3 Determination of resistance to fragmentation by the impact test method A.3.1 Principle A.3.2 Preparation of test specimens A.3.3 Test procedure |
| 22 | A.3.4 Calculation and expression of results A.3.5 Test report A.3.5.1 Required data |
| 23 | A.3.5.2 Optional data |
| 24 | Annex B (informative)Alternative narrow range classifications B.1 Los Angeles test B.2 Impact test |
| 26 | Annex C (informative)The impact tester: Construction, operation and safety requirements C.1 General C.2 Construction |
| 27 | C.3 Lifting device C.3.1 Drop hammer C.3.2 Guides C.3.3 Lifting and drive motor, counters C.4 Sample holder C.4.1 General |
| 28 | C.4.2 Mortar C.4.3 Pestle C.4.4 Contact pressure and adjustment device C.5 Anvil |
| 29 | C.6 Base plate and dampers C.7 Safety requirements and testing C.8 Checking of impact tester |
| 38 | Annex D (informative)Checking of the impact tester D.1 Scope and field of application D.2 Checklist D.3 Apparatus and test agents D.4 Procedure D.4.1 Verification of vertical set-up and guide play between pestle and mortar |
| 39 | D.4.2 Determination of hardness of hammer head, pestle, mortar and anvil D.4.3 Testing the surface D.4.4 Testing of bolts with waisted shanks D.4.5 Testing of contact pressure device D.4.6 Testing of drop height constancy |
| 40 | Annex E (informative)Precision E.1 General E.2 Los Angeles test E.3 Impact test |
| 42 | Annex F (informative)Worked example of calculation of impact value SZ |
| 43 | Annex G (informative)Alternative narrow range classification for the Los Angeles test of 16/32 mm recycled aggregates |
| 44 | Annex H (informative)Additional sieve for evaluation of the Los Angeles test for railway ballast |
