Abstract
This paper presents a comprehensive laboratory evaluation for developing synthetic aggregate using off-ASTM specification ash produced through a fluidized bed combustion (FBC) process. To determine optimum mix design which produces strong and durable synthetic aggregate, different combinations of water to fly ash ratio, various combination of fly ash (FAf) to stockpiled material (FAsp) ratio, curing temperature, and calcium chloride content were applied. Then, to evaluate the performance of synthetic aggregate for construction application, basic characteristics of synthetic aggregate such as density, specific gravity, absorption, gradation, strength, abrasion resistance, and soundness were carried out. The results indicate that 100% RH and 40 °C was determined to be the optimum curing conditions for both fly ash paste and FAf/FAsp mortar mixtures in terms of strength and minimal potential sulfate attack. The aggregate characterization results indicate that the produced synthetic aggregates met ASTM C 33/330 criteria for a concrete aggregate without inducing any soundness problems despite their relatively high water absorption. Therefore, the FBC ash and stockpiled ash can be used as primary resource materials for manufacturing synthetic light weight aggregate.
| Original language | English |
|---|---|
| Pages (from-to) | 700-707 |
| Number of pages | 8 |
| Journal | Construction and Building Materials |
| Volume | 38 |
| DOIs | |
| Publication status | Published - Jan 2013 |
| Externally published | Yes |
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Keywords
- Fluidized bed combustion process
- Light weight aggregate
- Off-ASTM specification ash
- Synthetic aggregate
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
Cite this
Development of synthetic aggregate using off-ASTM specification ashes. / Shon, Chang Seon; Jung, Youn Su; Saylak, Don; Mishra, Surendra K.
In: Construction and Building Materials, Vol. 38, 01.2013, p. 700-707.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of synthetic aggregate using off-ASTM specification ashes
AU - Shon, Chang Seon
AU - Jung, Youn Su
AU - Saylak, Don
AU - Mishra, Surendra K.
PY - 2013/1
Y1 - 2013/1
N2 - This paper presents a comprehensive laboratory evaluation for developing synthetic aggregate using off-ASTM specification ash produced through a fluidized bed combustion (FBC) process. To determine optimum mix design which produces strong and durable synthetic aggregate, different combinations of water to fly ash ratio, various combination of fly ash (FAf) to stockpiled material (FAsp) ratio, curing temperature, and calcium chloride content were applied. Then, to evaluate the performance of synthetic aggregate for construction application, basic characteristics of synthetic aggregate such as density, specific gravity, absorption, gradation, strength, abrasion resistance, and soundness were carried out. The results indicate that 100% RH and 40 °C was determined to be the optimum curing conditions for both fly ash paste and FAf/FAsp mortar mixtures in terms of strength and minimal potential sulfate attack. The aggregate characterization results indicate that the produced synthetic aggregates met ASTM C 33/330 criteria for a concrete aggregate without inducing any soundness problems despite their relatively high water absorption. Therefore, the FBC ash and stockpiled ash can be used as primary resource materials for manufacturing synthetic light weight aggregate.
AB - This paper presents a comprehensive laboratory evaluation for developing synthetic aggregate using off-ASTM specification ash produced through a fluidized bed combustion (FBC) process. To determine optimum mix design which produces strong and durable synthetic aggregate, different combinations of water to fly ash ratio, various combination of fly ash (FAf) to stockpiled material (FAsp) ratio, curing temperature, and calcium chloride content were applied. Then, to evaluate the performance of synthetic aggregate for construction application, basic characteristics of synthetic aggregate such as density, specific gravity, absorption, gradation, strength, abrasion resistance, and soundness were carried out. The results indicate that 100% RH and 40 °C was determined to be the optimum curing conditions for both fly ash paste and FAf/FAsp mortar mixtures in terms of strength and minimal potential sulfate attack. The aggregate characterization results indicate that the produced synthetic aggregates met ASTM C 33/330 criteria for a concrete aggregate without inducing any soundness problems despite their relatively high water absorption. Therefore, the FBC ash and stockpiled ash can be used as primary resource materials for manufacturing synthetic light weight aggregate.
KW - Fluidized bed combustion process
KW - Light weight aggregate
KW - Off-ASTM specification ash
KW - Synthetic aggregate
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UR - http://www.scopus.com/inward/citedby.url?scp=84867608951&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2012.09.009
DO - 10.1016/j.conbuildmat.2012.09.009
M3 - Article
VL - 38
SP - 700
EP - 707
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
ER -