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Statistical Analysis of Strength Development as a Function of Various Parameters on Activated Metakaolin/Slag Cements
Author(s) -
BurciagaDíaz Oswaldo,
EscalanteGarcía Jose Ivan,
ArellanoAguilar Raúl,
Gorokhovsky Alexander
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03414.x
Subject(s) - metakaolin , ground granulated blast furnace slag , materials science , sodium silicate , compressive strength , curing (chemistry) , factorial experiment , modulus , composite material , young's modulus , fly ash , mathematics , statistics
This investigation statistically examines the strength development on alkaline activation of metakaolin (Mk)/blast furnace slag (BFS) pastes. The main parameters studied are: BFS/Mk weight ratio (100/0, 80/20, 50/50, 20/80, and 0/100), modulus of the alkaline solutions of sodium silicate (M=SiO 2 /NaO 2 at 0, 1, 1.5, 2), %Na 2 O (5%, 10%, and 15%), and curing time. Cubes were cured at 20°C for up to 360 days; the compressive strength and other characteristics were investigated. A fully factorial experimental design was used to determine the influence of each variable. The curing time and the interaction of the factors BFS/Mk ratio‐%Na 2 O were the most important, followed by the modulus and then the %Na 2 O; others such as the interaction BFS/Mk ratio modulus were less important. The results indicated that the addition of Mk to BFS reduced the strength, more notably at contents above 50%. For strength development, the most effective modulus was Ms=1 and higher %Na 2 O were required with higher Mk loads.