Optimization of cement and fly ash particle sizes to produce sustainable concretes

摘要: Abstract In the drive to produce more sustainable concretes, considerable emphasis has been placed on replacing cement in concrete mixtures with materials, both from a raw materials cost and CO2 footprint perspective. High volume fly ash concretes have proposed as one potential approach for achieving substantial reductions usage, but their usage is sometimes hampered by reduced early age strengths dramatically increased setting times. One limitation of current industry practice that portland cements are generally only optimized performance pure cement, opposed blended system. this paper, new optimizing particle sizes desired product will be presented. By appropriately selecting size distributions ash, equivalent 1 d 28 d may achieved about 35% volumetric replacement while maintaining same fraction water mixture, thus providing an actual reduction content.