Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate
Coal bottom ash (CBA) is one of the by-products that can be employed as fine aggregate to replace natural sand in concrete. Owing to the very low water demand, roller-compacted concrete (RCC) has the potential to use CBA as fine aggregate at a high proportion. However, little research about RCC usin...
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| Format: | Article |
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MDPI AG
2021-05-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/11/5/191 |
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| author | Yu Li Li Li Vivek Bindiganavile |
| author_facet | Yu Li Li Li Vivek Bindiganavile |
| author_sort | Yu Li |
| collection | DOAJ |
| description | Coal bottom ash (CBA) is one of the by-products that can be employed as fine aggregate to replace natural sand in concrete. Owing to the very low water demand, roller-compacted concrete (RCC) has the potential to use CBA as fine aggregate at a high proportion. However, little research about RCC using CBA entirely as fine aggregate has been conducted. In this study, the uniaxial compressive strength, deformation, stress–strain curves, and splitting tensile strength of CBA-containing RCC (CBA RCC) were studied to bridge this gap. The compressive strength, elasticity modulus, and splitting tensile strength of all mixtures decreased with increasing CBA content. The relationship between compressive strength and splitting tensile strength of CBA RCC was proposed, which is very close to that recommended by the CEB-FIP code. The uniaxial compressive constitutive model based on the continuum damage theory can well illustrate the stress–strain relationship of CBA RCC. The growth process of damage variable demonstrates the hybrid effect of coarse aggregate, cement, and compacting load on delaying damage under uniaxial compression. The theoretical formula can also accurately illustrate the stress–strain curves of RCC presented in the literature studies. |
| first_indexed | 2024-03-10T11:44:50Z |
| format | Article |
| id | doaj.art-f2847e0236fc43ad847b3ecceb8c9419 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T11:44:50Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj.art-f2847e0236fc43ad847b3ecceb8c94192023-11-21T18:11:20ZengMDPI AGBuildings2075-53092021-05-0111519110.3390/buildings11050191Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine AggregateYu Li0Li Li1Vivek Bindiganavile2Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaDepartment of Civil & Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2, CanadaCoal bottom ash (CBA) is one of the by-products that can be employed as fine aggregate to replace natural sand in concrete. Owing to the very low water demand, roller-compacted concrete (RCC) has the potential to use CBA as fine aggregate at a high proportion. However, little research about RCC using CBA entirely as fine aggregate has been conducted. In this study, the uniaxial compressive strength, deformation, stress–strain curves, and splitting tensile strength of CBA-containing RCC (CBA RCC) were studied to bridge this gap. The compressive strength, elasticity modulus, and splitting tensile strength of all mixtures decreased with increasing CBA content. The relationship between compressive strength and splitting tensile strength of CBA RCC was proposed, which is very close to that recommended by the CEB-FIP code. The uniaxial compressive constitutive model based on the continuum damage theory can well illustrate the stress–strain relationship of CBA RCC. The growth process of damage variable demonstrates the hybrid effect of coarse aggregate, cement, and compacting load on delaying damage under uniaxial compression. The theoretical formula can also accurately illustrate the stress–strain curves of RCC presented in the literature studies.https://www.mdpi.com/2075-5309/11/5/191constitutive modeluniaxial compressionsplitting tensile strengthroller-compacted concretecoal bottom ash |
| spellingShingle | Yu Li Li Li Vivek Bindiganavile Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate Buildings constitutive model uniaxial compression splitting tensile strength roller-compacted concrete coal bottom ash |
| title | Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate |
| title_full | Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate |
| title_fullStr | Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate |
| title_full_unstemmed | Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate |
| title_short | Constitutive Model of Uniaxial Compressive Behavior for Roller-Compacted Concrete Using Coal Bottom Ash Entirely as Fine Aggregate |
| title_sort | constitutive model of uniaxial compressive behavior for roller compacted concrete using coal bottom ash entirely as fine aggregate |
| topic | constitutive model uniaxial compression splitting tensile strength roller-compacted concrete coal bottom ash |
| url | https://www.mdpi.com/2075-5309/11/5/191 |
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