Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods

Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods

Life-cycle assessments (LCAs) were conducted to evaluate the replacement of sand with coal bottom ash (CBA) in concrete. CBA is a byproduct of coal-fueled electricity production. Sand was replaced with CBA at proportions of 0, 25, 50, 75, and 100 wt.%, and the resultant concretes were denoted as CBA...

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Main Author: Svetlana Pushkar
Format: Article
Language:English
Published: MDPI AG 2019-09-01
Series:Applied Sciences
Subjects:
coal bottom ash
sand replacement
concrete design method
LCA
ANOVA
Online Access:https://www.mdpi.com/2076-3417/9/17/3620
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spelling doaj-e64bb2f27fb0410fa04a5786e267779f2020-11-25T01:11:35ZengMDPI AGApplied Sciences2076-34172019-09-01917362010.3390/app9173620app9173620Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design MethodsSvetlana Pushkar0Department of Civil Engineering, Ariel University, Ariel 40700, Israel, <email>svetlanap@ariel.ac.il</email>Life-cycle assessments (LCAs) were conducted to evaluate the replacement of sand with coal bottom ash (CBA) in concrete. CBA is a byproduct of coal-fueled electricity production. Sand was replaced with CBA at proportions of 0, 25, 50, 75, and 100 wt.%, and the resultant concretes were denoted as CBA0, CBA25, CBA50, CBA75, and CBA100, respectively. Two concrete mixture design methods (that resulted in different component qualities of concrete mixtures) were used: (i) Mixture with a fixed slump (MIX-fixed-SLUMP) and (ii) mixture with a fixed water/cement ratio (MIX-fixed-W/C). The ReCiPe2016 midpoint and single score (six methodological options) methods were followed to compare the environmental damage caused by the CBA-based concretes. The ReCiPe2016 results showed that replacing sand with CBA was environmentally (i) beneficial with the MIX-fixed-SLUMP design and (ii) harmful with the MIX-fixed-W/C design. Therefore, using CBA as a partial sand replacement in concrete production is a controversial issue as it highly depends on the concrete mixture design method.https://www.mdpi.com/2076-3417/9/17/3620coal bottom ashsand replacementconcrete design methodLCAANOVA
collection DOAJ
language English
format Article
sources DOAJ
author Svetlana Pushkar
spellingShingle Svetlana Pushkar
Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods
Applied Sciences
coal bottom ash
sand replacement
concrete design method
LCA
ANOVA
author_facet Svetlana Pushkar
author_sort Svetlana Pushkar
title Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods
title_short Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods
title_full Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods
title_fullStr Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods
title_full_unstemmed Life-Cycle Assessment of the Substitution of Sand with Coal Bottom Ash in Concrete: Two Concrete Design Methods
title_sort life-cycle assessment of the substitution of sand with coal bottom ash in concrete: two concrete design methods
publisher MDPI AG
series Applied Sciences
issn 2076-3417
publishDate 2019-09-01
description Life-cycle assessments (LCAs) were conducted to evaluate the replacement of sand with coal bottom ash (CBA) in concrete. CBA is a byproduct of coal-fueled electricity production. Sand was replaced with CBA at proportions of 0, 25, 50, 75, and 100 wt.%, and the resultant concretes were denoted as CBA0, CBA25, CBA50, CBA75, and CBA100, respectively. Two concrete mixture design methods (that resulted in different component qualities of concrete mixtures) were used: (i) Mixture with a fixed slump (MIX-fixed-SLUMP) and (ii) mixture with a fixed water/cement ratio (MIX-fixed-W/C). The ReCiPe2016 midpoint and single score (six methodological options) methods were followed to compare the environmental damage caused by the CBA-based concretes. The ReCiPe2016 results showed that replacing sand with CBA was environmentally (i) beneficial with the MIX-fixed-SLUMP design and (ii) harmful with the MIX-fixed-W/C design. Therefore, using CBA as a partial sand replacement in concrete production is a controversial issue as it highly depends on the concrete mixture design method.
topic coal bottom ash
sand replacement
concrete design method
LCA
ANOVA
url https://www.mdpi.com/2076-3417/9/17/3620
work_keys_str_mv AT svetlanapushkar lifecycleassessmentofthesubstitutionofsandwithcoalbottomashinconcretetwoconcretedesignmethods
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