Source: ASTM International, West Conshohocken, Pa.
ASTM Committee C09 on Concrete and Concrete Aggregates is set to publish C1849/C1849M, Test Method for Density and Air Content (Pressure Method) of Freshly Mixed Roller-Compacted Concrete. The document will especially suit labs designing and proportioning RCC mixtures, plus quality control/assurance inspectors verifying pavement specification compliance.
“There is currently no ASTM standard for determining air content of RCC. The air-content value is needed to proportion mixtures by the absolute volume method and, if applicable, to adjust air content to within the specified range,” says C09 member Dennis Clute of the U. S. Department of Agriculture’s National Resources Conservation Service. ASTM C1849/C1849M includes measurement of mixture density, he adds, which is helpful with troubleshooting RCC mixture or compaction method problems.