TY - JOUR
T1 - Review, sampling, and evaluation of landfilled fly ash
AU - Kaladharan, Gopakumar
AU - Gholizadeh-Vayghan, Asghar
AU - Rajabipour, Farshad
N1 - Funding Information:
The authors wish to express their gratitude to the Pennsylvania Coal Ash Research Group for the financial support of this research. The authors are also thankful to S. Feldman (NIST), D. Fura, T. Szeles, and the wonderful staff scientists at Penn State’s Materials Characterization Laboratory.
Publisher Copyright:
©2019, American Concrete Institute.
PY - 2019/7
Y1 - 2019/7
N2 - The growing scarcity of high-quality fly ash has urged concrete researchers and practitioners to investigate unconventional sources such as landfilled fly ash. This paper presents a summary of the potential issues with using landfilled fly ash as a concrete pozzolan. To that end, successful characterization of fly ash landfills is crucial to determine the viability of a given landfill as a pozzolan resource. Accordingly, a statistical sampling approach was developed and applied to a Class F fly ash landfill in Pennsylvania. Samples taken from the landfill were tested based on ASTM C618 requirements and statistical analyses were performed to determine the necessary beneficiation strategy. Blended mortar and concrete mixtures incorporating the beneficiated fly ash were tested for slump, plastic and hardened air content, compressive strength, and mitigation of alkali-silica reaction (ASR).
AB - The growing scarcity of high-quality fly ash has urged concrete researchers and practitioners to investigate unconventional sources such as landfilled fly ash. This paper presents a summary of the potential issues with using landfilled fly ash as a concrete pozzolan. To that end, successful characterization of fly ash landfills is crucial to determine the viability of a given landfill as a pozzolan resource. Accordingly, a statistical sampling approach was developed and applied to a Class F fly ash landfill in Pennsylvania. Samples taken from the landfill were tested based on ASTM C618 requirements and statistical analyses were performed to determine the necessary beneficiation strategy. Blended mortar and concrete mixtures incorporating the beneficiated fly ash were tested for slump, plastic and hardened air content, compressive strength, and mitigation of alkali-silica reaction (ASR).
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U2 - 10.14359/51716750
DO - 10.14359/51716750
M3 - Article
AN - SCOPUS:85072240538
SN - 0889-325X
VL - 116
SP - 113
EP - 122
JO - ACI Materials Journal
JF - ACI Materials Journal
IS - 4
ER -