TY - JOUR
T1 - Quantitative assessment of parameters that affect strength development in alkali activated fly ash binders
AU - Kazemian, Ali
AU - Gholizadeh Vayghan, Asghar
AU - Rajabipour, Farshad
N1 - Funding Information:
The authors gratefully acknowledge support received from the U.S. National Science Foundation (NSF) under Grant# CMMI 1030708 awarded to the third author. Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. This work was conducted at the Civil Infrastructure Testing and Evaluation Laboratory (CITEL) of the Pennsylvania State University.
PY - 2015/7/29
Y1 - 2015/7/29
N2 - The influence of activator composition (pH, modulus), activator to fly ash ratio, (L/S)vol, and curing on strength development of alkali activated fly ash (AAFA) mortars is investigated. A statistical analysis is performed to evaluate the significance of these parameters and to develop a preliminary regression model for predicting the 1-day strength. The results show that to achieve high strengths, activators with very high pH (≥15.0) or high pH and moderate modulus (pH ≥ 14.75, n ≥ 0.75) are needed. Such activators have high viscosity and lead to low workability. AAFA strength does not monotonically increase with reducing (L/S)vol, but is maximum at intermediate (L/S)vol.
AB - The influence of activator composition (pH, modulus), activator to fly ash ratio, (L/S)vol, and curing on strength development of alkali activated fly ash (AAFA) mortars is investigated. A statistical analysis is performed to evaluate the significance of these parameters and to develop a preliminary regression model for predicting the 1-day strength. The results show that to achieve high strengths, activators with very high pH (≥15.0) or high pH and moderate modulus (pH ≥ 14.75, n ≥ 0.75) are needed. Such activators have high viscosity and lead to low workability. AAFA strength does not monotonically increase with reducing (L/S)vol, but is maximum at intermediate (L/S)vol.
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U2 - 10.1016/j.conbuildmat.2015.05.078
DO - 10.1016/j.conbuildmat.2015.05.078
M3 - Article
AN - SCOPUS:84938202708
SN - 0950-0618
VL - 93
SP - 869
EP - 876
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -