Normally the clinker litreweight is being tested in any cement industry for measuring the clinker quality. My question here is what ideal fraction should be used for measuring the litre weight of clinker and Why. Presently we are taking the fraction between -12.5 mm and +6.3 mm. Is it right?. IF not tell me what fraction should i take. I also request to tell me the logic behind adopting the particular fraction for measuring the litre weight. ■