Evaluation of Alternative Sources of SCMs for Concrete Materials

Subedi, Sujata; Huang, Oscar; Arce, Gabriel; Lies, Nathaniel J.; Radović, Miladin; Hassan, Marwa; Hossain, Zahid

doi:10.1061/9780784483787.019

Cited by 1 publication

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Note : FA = fly ash; GBA = ground bottom ash; LOI = loss on ignition; OPC = ordinary Portland cement; RFA = reclaimed fly ash; NA = not available. Source : Data from ( 22 ). …”

Section: Resultsmentioning

confidence: 99%

“…Table 2 presents the LOI and moisture content data for all coal ashes from a previous study ( 22 ). It is observed that FA exhibited the highest moisture content compared with RFA and GBA (RFA exhibited the lowest moisture content).…”

Section: Resultsmentioning

confidence: 99%

“…X-ray diffraction (XRD) and X-ray fluorescence (XRF) provide insight into the mineral and chemical composition of the ashes, respectively. The XRD and XRF data of the three coal ashes were obtained from a previous study by the authors ( 22 ).…”

Section: Methodsmentioning

confidence: 99%

“…The water requirement and 7- and 28-day strength activity index (SAI) of the ashes were evaluated according to ASTM C311 ( 24 ). Loss on ignition (LOI) and moisture content were obtained from a previous study by the authors ( 22 ). Furthermore, laser diffraction particle size analysis was conducted using the Partica LA-960 (HORIBA, Ltd., CA, U.S.) using dried powder to determine the particle size distribution of the ashes.…”

Section: Methodsmentioning

confidence: 99%

“…As such, a total of 10 concrete mixtures, including the control mixture, were evaluated in this study. It is important to mention that the fresh properties and 28-days hardened properties of the control mixture and mixtures implementing ashes at 10% cement replacement level (i.e., FA-10, RFA-10, and GBA-10) were determined from a previous study by the authors ( 22 ).…”

Section: Methodsmentioning

confidence: 99%

See 4 more Smart Citations

Evaluation of Alternative Sources of Supplementary Cementitious Materials for Concrete Materials

Subedi

Arce

Hassan

et al. 2022

Transportation Research Record

Self Cite

View full text Add to dashboard Cite

This study characterized and evaluated the use of reclaimed fly ash (RFA) and reclaimed ground bottom ash (GBA) as alternative sources of supplementary cementitious materials (SCMs) for the production of concrete mixtures. Conventional Class F fly ash (FA) was also evaluated for comparison. The effects of SCM content on fresh and hardened properties of concrete were investigated by replacing 10%, 20%, and 30% of cement by mass. Characterization results showed that all three ashes met ASTM C618 chemical requirements (i.e., sum of SiO2 + Al2O3 + Fe2O3, CaO, SO3, moisture content, and loss of ignition) and 7- and 28-days strength activity index (SAI) requirements for Class F FA. In addition, RFA exhibited slightly higher SAI at 28 days of curing, followed by GBA and FA. In relation to fresh concrete properties, FA increased the concrete slump compared with the control mixture, whereas RFA and GBA decreased the concrete slump. However, GBA produced more significant slump decrements than RFA, which was attributed to the irregular angular particles of GBA. Generally, all the coal ashes produced decrements in air content compared with the control mixture. Comparatively, among the three ashes, GBA exhibited the highest 28- and 90-days compressive strength and surface resistivity (SR) at all cement replacement levels. Furthermore, at 90 days of curing, RFA and GBA concrete mixtures outperformed the FA concrete mixtures in relation to compressive strength and SR. Consequently, both RFA and GBA are promising SCMs for concrete materials.

show abstract

“… Note : FA = fly ash; GBA = ground bottom ash; LOI = loss on ignition; OPC = ordinary Portland cement; RFA = reclaimed fly ash; NA = not available. Source : Data from ( 22 ). …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations