| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | Contents Page <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions 4 Apparatus 4.1 General apparatus Table 1 \u2014 Test sieves <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4.2 Additional apparatus required for the determination of resistance to fragmentation by the Los Angeles test method Figure 1 \u2014 Typical Los Angeles testing machine <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4.3 Additional apparatus required for the determination of resistance to fragmentation by the impact test method 5 Determination of resistance to fragmentation by the Los Angeles test method 5.1 Principle 5.2 Preparation of test portion <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.3 Test procedure 5.4 Calculation and expression of results <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.5 Test report 5.5.1 Required data 5.5.2 Optional data 6 Determination of resistance to fragmentation by the impact test method 6.1 Principle <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 6.2 Preparation of test specimens 6.3 Test procedure <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 6.4 Calculation and expression of results 6.5 Test report 6.5.1 Required data 6.5.2 Optional data <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Annex A (normative) Determination of the resistance to fragmentation of aggregates for railway ballast A.1 Apparatus A.1.1 General apparatus Table A.1 \u2014 Test sieves A.1.2 Additional apparatus required for the determination of resistance to fragmentation by the Los Angeles test method <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | A.1.3 Additional apparatus required for the determination of resistance to fragmentation by the impact test method A.2 Determination of the resistance to fragmentation by the Los Angeles test method A.2.1 Principle A.2.2 Preparation of test portion <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | A.2.3 Test procedure A.2.4 Calculation and expression of results A.2.5 Test report A.2.5.1 Required data A.2.5.2 Optional data <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | A.3 Determination of the resistance to fragmentation by the impact test method A.3.1 Principle A.3.2 Preparation of test specimens A.3.3 Test procedure <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | A.3.4 Calculation and expression of results A.3.5 Test report A.3.5.1 Required data A.3.5.2 Optional data <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Annex B (informative) Alternative narrow range classifications for the Los Angeles test and for the impact test B.1 Los Angeles test Table B.1 \u2014 Alternative narrow range classifications for the Los Angeles test method B.2 Impact test Table B.2 \u2014 Alternative narrow range classifications for the impact test method <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Annex C (informative) The impact tester: Construction, operation and safety requirements C.1 General C.2 Construction <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | C.4.2 Mortar C.4.3 Pestle C.4.4 Contact pressure and adjustable device C.5 Anvil <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | C.6 Base plate and dampers C.7 Safety requirements and testing C.8 Checking of impact tester <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Figure C.1 \u2014 Diagrammatic representation of impact tester <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Figure C.2 \u2014 Set-up of the moving parts <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure C.3 \u2014 Hammer <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure C.4 \u2014 Guide rails <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Figure C.5 \u2014 Mortar <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Figure C.6 \u2014 Pestle with turnbuckle <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure C.7 \u2014 Anvil with base plate and dampers <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure C.8 \u2014 Construction of the dampers <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex D (informative) Checking of the impact tester D.1 Scope and field of application D.2 Checklist D.3 Apparatus and test agents <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure D.1 \u2014 Sensor fitted between pestle and anvil for determining the force\/time relationship during impact Figure D.2 \u2014 Example of test set-up for determining the impact effect <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | D.4 Procedure D.4.1 Verification of vertical set-up and guide play between pestle and mortar 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 <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | D.4.5 Testing of contact pressure device D.4.6 Testing of drop height constancy D.4.7 Determination of impact effect <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Annex E (informative) Precision E.1 General E.2 Los Angeles test E.3 Impact test <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Annex F (informative) Worked example of calculation of impact value SZ Table F.1 \u2014 Example data <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Annex G (informative) Alternative narrow range classification for the Los Angeles test of 16\/32 mm recycled aggregates Table G.1 \u2014 Alternative narrow range classification <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex H (informative) Additional sieve for evaluation of the Los Angeles test for railway ballast Table H.1 \u2014 Extra evaluation sieve for Annex A <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" BS EN 1097-2. Tests for mechanical and physical properties of aggregates. Part 2. Methods for the determination of resistance to fragmentation<\/b><\/p>\n |