Quantitative assessment of parameters that affect strength development in alkali activated fly ash binders

Ali Kazemian; Asghar Gholizadeh Vayghan; Farshad Rajabipour

doi:10.1016/j.conbuildmat.2015.05.078

Quantitative assessment of parameters that affect strength development in alkali activated fly ash binders

Ali Kazemian, Asghar Gholizadeh Vayghan, Farshad Rajabipour

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	869-876
Number of pages	8
Journal	Construction and Building Materials
Volume	93
DOIs	https://doi.org/10.1016/j.conbuildmat.2015.05.078
State	Published - Jul 29 2015

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2015.05.078

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title = "Quantitative assessment of parameters that affect strength development in alkali activated fly ash binders",

abstract = "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.",

author = "Ali Kazemian and {Gholizadeh Vayghan}, Asghar and Farshad Rajabipour",

year = "2015",

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day = "29",

doi = "10.1016/j.conbuildmat.2015.05.078",

language = "English (US)",

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journal = "Construction and Building Materials",

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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

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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DO - 10.1016/j.conbuildmat.2015.05.078

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SN - 0950-0618

VL - 93

SP - 869

EP - 876

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Quantitative assessment of parameters that affect strength development in alkali activated fly ash binders

Abstract

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