| Laboratory Test Sheet |
| LOSS ON IGNITION - BS 1377 Part 34: 1990 |
| Client : Site : |
| Client Ref : Lab. Ref : Job No : Date Received : |
| Supplier : Source : |
| Material Type : Specification : |
| Material Name : Stone Type : |
| Equipment Check ................................................................................... |
| Calibration Check ................................................................................... |
| Sieve Check ............................................................................................ |
| Compaction Spec. ................................................................................... |
| Crucibles in Kiln 440 +/- 25C > 1hr Time in Time out |
| Weight of Crucibles Mc to 0.001g Mc 1 g Mc 2 g |
| Record weights to the nearest 0.1% for preparation of sample. |
| Weight of Wet Sample g Weight when dried at 50 +/- 2.5C M1 g |
| Weight passing 2mm Sieve M2 g TEST 1 TEST 2 |
| Weight of prepared samples in crucibles 1 g 2 g |
| Dry sample at 50 +/- 2.5C at 4 hr intervals Time in Time out |
| Samples deemed to be dry when the 1 g 2 g |
| differences in successive weighings Time in Time out |
| is not > 0.1% of original mass 1 g 2 g |
| Time in Time out |
| Weight of dried sample to 0.001g M3 1 g M3 2 g |
| Place in unheated muffle furnace, and Time in 1 Time out 2 |
| heat to 440 +/- 25C for > 3 hrs |
| Weight of ignited sample to 0.001g M4 1 g M4 2 g |
| Fraction finer then 2mm = M2 W 100 |
| M1 % |
| Loss on Ignition = M3 - M4 W 100 |
| M3 - Mc 1 % 2 % |
| NOTE 1) LOI to two significant figures Mean LOI |
| 2) Percentage finer then 2mm to nearest 1% % |
| Remarks |
| Comments : |
| Tested By : Date : Checked By : Date : |
| Check Level (1/2/3) |
| Notes : * Delete as applicable |