Page 43 - Demo

CONCRETE TECHNOLOGYwww.cpi-worldwide.com CPI %u2013 Concrete Plant International %u2013 5 | 2025 413 Fresh concrete consistency in the conventional 3-component systemIn a first step, the required water content for achieving a specific fresh concrete consistency was investigated by varying the constituent materials (sand and cement). For this purpose, concretes were produced using the conventional 3-component system, with variation of the cement type (Z1 to Z4) and fine aggregate (S1 and S4). To achieve different consistencies, the water content was systematically varied between 170 and 234 L/m%u00b3, corresponding to w/c ratios ranging from 0.50 to 0.65. In addition, the cement content %u2013 and thus the paste content %u2013 of the fresh concrete was varied. Table 3 summarizes the concrete mix compositions studied. It is evident Table 3: Concrete compositions.Notation Cement1) Water 0/22) 2/83) 8/164) w/c ratio[kg/dm%u00b3] [kg/dm%u00b3] [kg/dm%u00b3] [kg/dm%u00b3] [kg/dm%u00b3] [%u2013]M1-1 340 170 656 416 783 0.50M1-2 340 187 656 416 738 0.55M1-3 340 204 656 416 694 0.60M1-4 340 221 656 416 649 0.65M2-1 360 180 656 416 738 0.50M2-2 360 198 656 416 694 0.55M2-3 360 216 656 416 649 0.60M2-4 360 234 656 416 602 0.651) Cement Z1-Z4 (see Table 2). 2) Sand S1-S4 (see Table 1). 3) Content and type is consistent across all concrete mixes investigated. 4) Type is consistent across all concretes; volumetric adaptation of the content depending on the water content.THE KNIELE KKMWeb:Catalogue:Movie:THE ART OF MIXINGMade in Germany