Rheology-based mixing process management Production of high-performance concretes to specification

摘要

High-performance concretes (HPCs) are becoming increasingly attractive in construction practice due to their very dense matrix that results in outstanding durability and strength parameters. HPCs contain a very high amount of fines; they are produced with only a small water ratio. For this reason, the production of the fresh concrete requires a high amount of mixing energy associated with significantly longer mixing times. Higher mixing tool speeds enable an increase in the amount of mixing energy introduced but result in greater tool wear. HPC mixes are also very sensitive to minor variations in the quality and batching of the input materials.