Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures
Wasted oyster shells generate environmental pollution and odor, thereby causing inconvenience to people. In addition, low-quality aggregates are generated owing to the lack of sand. To address these problems, cementitious composites that replaced sand with oyster shell powder were fabricated in this...
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/11/2787 |
| _version_ | 1797459894393110528 |
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| author | Inyeong Cha Jinwoong Kim Heeyoung Lee |
| author_facet | Inyeong Cha Jinwoong Kim Heeyoung Lee |
| author_sort | Inyeong Cha |
| collection | DOAJ |
| description | Wasted oyster shells generate environmental pollution and odor, thereby causing inconvenience to people. In addition, low-quality aggregates are generated owing to the lack of sand. To address these problems, cementitious composites that replaced sand with oyster shell powder were fabricated in this study, and a total 120 specimens were fabricated (specimen size: <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>50</mn><mo>×</mo><mn>50</mn><mo>×</mo><mn>50</mn><mo> </mo><msup><mrow><mi mathvariant="normal">m</mi><mi mathvariant="normal">m</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></semantics></math></inline-formula>). The oyster shell substitution rate for sand, admixture type, and presence or absence of admixture were set as the experimental parameters. Herein, 0, 30, 70, and 100% of sand was replaced with oyster shell powder to examine the compressive strength of the cementitious composites according to the oyster shell powder content. The experiment results confirmed the decrease in the compressive strength of the cementitious composite with an increase in the oyster shell powder content. In the case of the cementitious composites mixed with oyster shell powder, silica fume, blast furnace slag, and an air-entraining water-reducing agent, the compressive strength increased by up to 30% with an increase in the oyster shell powder content. The results of cementitious composites containing oyster shell powder and admixture fabricated in this study indicate the potential of oyster shells as a new construction material that can replace sand. |
| first_indexed | 2024-03-09T16:57:26Z |
| format | Article |
| id | doaj.art-2f3c4817016149499f94f5006f8f9320 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T16:57:26Z |
| publishDate | 2023-11-01 |
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| series | Buildings |
| spelling | doaj.art-2f3c4817016149499f94f5006f8f93202023-11-24T14:33:22ZengMDPI AGBuildings2075-53092023-11-011311278710.3390/buildings13112787Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and AdmixturesInyeong Cha0Jinwoong Kim1Heeyoung Lee2Department of Civil Engineering, Chosun University, 309 Pilmun-Daero, Dong-Gu, Gwangju 501-759, Republic of KoreaDepartment of Civil Engineering, Chosun University, 309 Pilmun-Daero, Dong-Gu, Gwangju 501-759, Republic of KoreaDepartment of Civil Engineering, Chosun University, 309 Pilmun-Daero, Dong-Gu, Gwangju 501-759, Republic of KoreaWasted oyster shells generate environmental pollution and odor, thereby causing inconvenience to people. In addition, low-quality aggregates are generated owing to the lack of sand. To address these problems, cementitious composites that replaced sand with oyster shell powder were fabricated in this study, and a total 120 specimens were fabricated (specimen size: <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>50</mn><mo>×</mo><mn>50</mn><mo>×</mo><mn>50</mn><mo> </mo><msup><mrow><mi mathvariant="normal">m</mi><mi mathvariant="normal">m</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></semantics></math></inline-formula>). The oyster shell substitution rate for sand, admixture type, and presence or absence of admixture were set as the experimental parameters. Herein, 0, 30, 70, and 100% of sand was replaced with oyster shell powder to examine the compressive strength of the cementitious composites according to the oyster shell powder content. The experiment results confirmed the decrease in the compressive strength of the cementitious composite with an increase in the oyster shell powder content. In the case of the cementitious composites mixed with oyster shell powder, silica fume, blast furnace slag, and an air-entraining water-reducing agent, the compressive strength increased by up to 30% with an increase in the oyster shell powder content. The results of cementitious composites containing oyster shell powder and admixture fabricated in this study indicate the potential of oyster shells as a new construction material that can replace sand.https://www.mdpi.com/2075-5309/13/11/2787oyster shellsrecyclingsand substitutecompressive strengthinternal structure analysis |
| spellingShingle | Inyeong Cha Jinwoong Kim Heeyoung Lee Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures Buildings oyster shells recycling sand substitute compressive strength internal structure analysis |
| title | Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures |
| title_full | Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures |
| title_fullStr | Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures |
| title_full_unstemmed | Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures |
| title_short | Enhancing Compressive Strength in Cementitious Composites through Effective Use of Wasted Oyster Shells and Admixtures |
| title_sort | enhancing compressive strength in cementitious composites through effective use of wasted oyster shells and admixtures |
| topic | oyster shells recycling sand substitute compressive strength internal structure analysis |
| url | https://www.mdpi.com/2075-5309/13/11/2787 |
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