Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting
With concrete usage being common in the construction industry, there are more issues encountered on-site such as slump loss due to delayed casting. This research investigates the impact of medium-range superplasticizer dosage on the workability and strength properties of concrete. The study aims to...
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| Format: | Final Year Project / Dissertation / Thesis |
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2024
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| Online Access: | http://eprints.utar.edu.my/7070/ http://eprints.utar.edu.my/7070/1/2005720_FYP_Report_%2D_KAI_JIAN_TEONG.pdf |
| _version_ | 1848886841010290688 |
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| author | Teong, Kai Jian |
| author_facet | Teong, Kai Jian |
| author_sort | Teong, Kai Jian |
| building | UTAR Institutional Repository |
| collection | Online Access |
| description | With concrete usage being common in the construction industry, there are more issues encountered on-site such as slump loss due to delayed casting. This research investigates the impact of medium-range superplasticizer dosage on the workability and strength properties of concrete. The study aims to identify the optimal dosage of medium-range superplasticizer that enhances concrete performance without compromising its strength quality. A series of tests, including slump, Vebe time, compacting factor, density, and compressive strength measurements, were conducted on Grade 30 concrete mixes with varying dosages of medium-range superplasticizer. The trial mix stage of this study was performed by testing the performance of various mixes to produce a control mix proportion that satisfies the workability and strength requirements of Grade 30 concrete. Desired slump value and the cube compressive strength at 28-day were set at 100 mm and 30 MPa respectively. In the actual mix stage, the results indicate that an increase in medium-range superplasticizer dosage generally improves workability. However, beyond a certain threshold (0.40% medium-range superplasticizer), excessive fluidity leads to segregation, negatively affecting the concrete's overall quality. The study identifies 0.20% as the optimal dosage, offering a balanced combination of workability, strength, and stability. This dosage provides a 28-day compressive strength of 31.76 MPa (35.03% higher than mix C2) and slump of 160 mm, making it ideal for practical applications in the construction industry. The findings contribute to a better understanding of how medium-range superplasticizers improve concrete performance, particularly in scenarios where re-dosing is necessary due to on-site delays.
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| first_indexed | 2025-11-15T19:44:54Z |
| format | Final Year Project / Dissertation / Thesis |
| id | utar-7070 |
| institution | Universiti Tunku Abdul Rahman |
| institution_category | Local University |
| last_indexed | 2025-11-15T19:44:54Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utar-70702025-01-19T02:11:11Z Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting Teong, Kai Jian T Technology (General) TA Engineering (General). Civil engineering (General) TS Manufactures With concrete usage being common in the construction industry, there are more issues encountered on-site such as slump loss due to delayed casting. This research investigates the impact of medium-range superplasticizer dosage on the workability and strength properties of concrete. The study aims to identify the optimal dosage of medium-range superplasticizer that enhances concrete performance without compromising its strength quality. A series of tests, including slump, Vebe time, compacting factor, density, and compressive strength measurements, were conducted on Grade 30 concrete mixes with varying dosages of medium-range superplasticizer. The trial mix stage of this study was performed by testing the performance of various mixes to produce a control mix proportion that satisfies the workability and strength requirements of Grade 30 concrete. Desired slump value and the cube compressive strength at 28-day were set at 100 mm and 30 MPa respectively. In the actual mix stage, the results indicate that an increase in medium-range superplasticizer dosage generally improves workability. However, beyond a certain threshold (0.40% medium-range superplasticizer), excessive fluidity leads to segregation, negatively affecting the concrete's overall quality. The study identifies 0.20% as the optimal dosage, offering a balanced combination of workability, strength, and stability. This dosage provides a 28-day compressive strength of 31.76 MPa (35.03% higher than mix C2) and slump of 160 mm, making it ideal for practical applications in the construction industry. The findings contribute to a better understanding of how medium-range superplasticizers improve concrete performance, particularly in scenarios where re-dosing is necessary due to on-site delays. 2024 Final Year Project / Dissertation / Thesis NonPeerReviewed application/pdf http://eprints.utar.edu.my/7070/1/2005720_FYP_Report_%2D_KAI_JIAN_TEONG.pdf Teong, Kai Jian (2024) Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting. Final Year Project, UTAR. http://eprints.utar.edu.my/7070/ |
| spellingShingle | T Technology (General) TA Engineering (General). Civil engineering (General) TS Manufactures Teong, Kai Jian Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| title | Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| title_full | Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| title_fullStr | Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| title_full_unstemmed | Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| title_short | Experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| title_sort | experimental study on grade 30 concrete slump behaviour and compressive strength after re-dosing with medium-range superplasticizer subjected to delayed casting |
| topic | T Technology (General) TA Engineering (General). Civil engineering (General) TS Manufactures |
| url | http://eprints.utar.edu.my/7070/ http://eprints.utar.edu.my/7070/1/2005720_FYP_Report_%2D_KAI_JIAN_TEONG.pdf |