ACI Certification Actual Field Test with complete Answers |Latest 2024/2025

When sampling from continuous mixers , sample the concrete after discharge of at least and following all mixture proportioning adjustments ️ 5 ft Based upon the sequence of events in ASTM C172 , the composite sample portions should be combined and remixed transporting the sample ( s ) to the place where the fresh tests will be performed . ️ After Sampling from 2 or more portions taken at regularly space intervals is required for all of the following except ️ paving mixers The temperature measuring device shall be submerged in the concrete for a minimum of minute ( s ) but no more than minutes ? ️ B ) 2 ; 5 Reference temperature measuring devices shall be readable and accurate to . at the verification points . ️ B ) 0.5 F According to ASTM C1064 concrete containing aggregate with a nominal maximum size greater than 3 may require up to minutes for the transfer of heat from the aggregate to the mortar . ️ 20