NIST Portland Cement, No.114r is used to verify and calibrate equipment for the ASTM C115 Wagner turbidimeter, C1891 fineness by air-jet sieve, and C204 Blaine apparatus, as well as the C430 fineness by sieve test. (AASHTO T 98, T 153, and T 192 test methods). This standard reference material is supplied with a NIST certificate of analysis in 20 vials of approximately 5g each of cement.



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