Abstract
The presented paper investigates the potential for the utilization of unprocessed, as excavated (i.e. unground), stockpiled coal combustion fluidized bed ash in road base course construction. In addition to functioning as a stabilizer of the fines in the stockpiled material, this ash also permits treating the stockpiled ash agglomerates as an aggregate. Both untreated and cement-treated mix designs were evaluated. The laboratory program included unconfined strength measurements, triaxial, volumetric swell, and moisture susceptibility testing protocols performed on cylindrical specimens compacted at their optimum moisture content. The results have shown that, without breaking down the agglomerates by grinding, the unstabilized stockpiled ash possesses very little residual cementitious activity; whereas, if treated with small amounts of cement (3%), it meets the required strength criteria for cement-treated base courses while minimizing the volumetric swell characteristics.
| Original language | English |
|---|---|
| Pages (from-to) | 2072-2078 |
| Number of pages | 7 |
| Journal | Construction and Building Materials |
| Volume | 24 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2010 |
| Externally published | Yes |
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Keywords
- Base course construction
- Circulating fluidized bed combustion ash
- Stockpiled ash
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
Cite this
Beneficiation of stockpiled fluidized bed coal ash in road base course construction. / Mejeoumov, Gleb G.; Shon, Chang Seon; Saylak, Don; Estakhri, Cindy K.
In: Construction and Building Materials, Vol. 24, No. 11, 11.2010, p. 2072-2078.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Beneficiation of stockpiled fluidized bed coal ash in road base course construction
AU - Mejeoumov, Gleb G.
AU - Shon, Chang Seon
AU - Saylak, Don
AU - Estakhri, Cindy K.
PY - 2010/11
Y1 - 2010/11
N2 - The presented paper investigates the potential for the utilization of unprocessed, as excavated (i.e. unground), stockpiled coal combustion fluidized bed ash in road base course construction. In addition to functioning as a stabilizer of the fines in the stockpiled material, this ash also permits treating the stockpiled ash agglomerates as an aggregate. Both untreated and cement-treated mix designs were evaluated. The laboratory program included unconfined strength measurements, triaxial, volumetric swell, and moisture susceptibility testing protocols performed on cylindrical specimens compacted at their optimum moisture content. The results have shown that, without breaking down the agglomerates by grinding, the unstabilized stockpiled ash possesses very little residual cementitious activity; whereas, if treated with small amounts of cement (3%), it meets the required strength criteria for cement-treated base courses while minimizing the volumetric swell characteristics.
AB - The presented paper investigates the potential for the utilization of unprocessed, as excavated (i.e. unground), stockpiled coal combustion fluidized bed ash in road base course construction. In addition to functioning as a stabilizer of the fines in the stockpiled material, this ash also permits treating the stockpiled ash agglomerates as an aggregate. Both untreated and cement-treated mix designs were evaluated. The laboratory program included unconfined strength measurements, triaxial, volumetric swell, and moisture susceptibility testing protocols performed on cylindrical specimens compacted at their optimum moisture content. The results have shown that, without breaking down the agglomerates by grinding, the unstabilized stockpiled ash possesses very little residual cementitious activity; whereas, if treated with small amounts of cement (3%), it meets the required strength criteria for cement-treated base courses while minimizing the volumetric swell characteristics.
KW - Base course construction
KW - Circulating fluidized bed combustion ash
KW - Stockpiled ash
UR - http://www.scopus.com/inward/record.url?scp=77955270129&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955270129&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2010.04.055
DO - 10.1016/j.conbuildmat.2010.04.055
M3 - Article
VL - 24
SP - 2072
EP - 2078
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
IS - 11
ER -