Properties of sustainable concrete containing fly ash, slag and recycled concrete aggregate

Portland slag and composites cement concretes: engineering and durability properties

“…From onwards, Portland-slag cement concretes indicated higher strength results comparing to PC concretes at all ages. This is coherent with existing studies that the hydration of GGBS is slower comparing to PC, therefore the reactivity of pozzolanic reaction between mineral admixtures and cement paste requires longer curing periods to compensate the early strength loss of concrete [2][3][4][5][6][7][9][10][11][12]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65…”

“…Extensive research carried out on the use of GGBS in combination with PC and other cementitious constituents in concretes indicated that lower early compressive strength due to slower hydration rate of GGBS [2][3][4][5][6][7][8][9][10][11][12]. The lower early strength reported in the existing studies have become more obvious as the replacement levels, on mass basis, increases [2,8].…”

“…Moreover, slightly improved and comparable results were obtained by Güneyisi [8] for 40% and 60% replacement level of GGBS. Studies carried out by Khatri [6] and Berndt [12] with 70% slag replacement in binary blend cement and 65% GGBS with silica fume (SF) in ternary blend cement concretes respectively indicated improved compressive strength at longer ages. Gesoğlu [14] stated that use of GGBS in ternary blend cement concrete with another mineral admixture fly ash (FA) with replacement levels of 10% for both admixtures provided the best performance strength at 28 days.…”

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

“…On the other hand, concretes with SCM addition are reporting a proper acceptance for this purpose (Ann et al, 2008;González and Martínex, 2008;Kou and Poon, 2008;Berndt, 2009;Corinaldesi and Moriconi, 2009), highlighting the positive impact of SCM on resistance and durability behaviors, as well as the environmental benefits they provide. (SCM or RCA) have different micro-structure.…”

Propiedades del hormigón de árido reciclado fabricado con adiciones, activa e inerte

“…La utilización de adiciones mejora las propiedades del hormigón. De acuerdo a las propiedades mecánicas de los hormigones reciclados fabricados con adiciones, diversos investigadores concluyeron que la utilización de adiciones activas mejora dichas propiedades (Ann, Moon, Kim & Ryou, 2008;Berndt, 2009;Corinaldesi & Moriconi, 2009). …”