Optimizing coal ash as a sustainable substitute of cement and aggregate in structural concrete
The manufacture of concrete for constructing the structures like highways, bridges, and buildings requires large amounts of cement and aggregates. This high concrete production depletes natural resources like sand and gravel for the construction industry. It also negatively impacts the environme...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2024
|
| Online Access: | http://journalarticle.ukm.my/25138/ http://journalarticle.ukm.my/25138/1/18.pdf |
| _version_ | 1848816279333371904 |
|---|---|
| author | Fahad-ul-Rehman Abro, Abdul Salam Buller, Tariq Ali, Imran Ali Channa, Zain-ul-Abdin, Safeer Ahmad Zaheer, |
| author_facet | Fahad-ul-Rehman Abro, Abdul Salam Buller, Tariq Ali, Imran Ali Channa, Zain-ul-Abdin, Safeer Ahmad Zaheer, |
| author_sort | Fahad-ul-Rehman Abro, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | The manufacture of concrete for constructing the structures like highways, bridges, and buildings requires large
amounts of cement and aggregates. This high concrete production depletes natural resources like sand and
gravel for the construction industry. It also negatively impacts the environment due to cement usage. This study
looked at using waste materials like coal bottom ash (CBA) and fly ash (FA) in concrete as substitutes for some of the
typical aggregates and cement. The goal was to reduce the environmental impact and preserve natural resources. The
study made concrete with regular Portland cement, sand, 10mm coarse aggregate, locally available CBA, and FA.
15% fly ash was selected as an optimal level from initial testing. The CBA was used to replace 0-35% of the fine
aggregate sand. Test cubes and cylinders were made with different mixes. Compressive strength, tensile strength,
carbonation, and sulfate attack tests were done after curing. Results showed 25% CBA improved the concrete’s
mechanical performance. The compressive and tensile strengths increased but not above conventional concrete. This is because CBA needs more moisture for full hydration over longer curing times. Also, the concrete’s durability
improved in terms of resistance to carbonation and sulfate attack. |
| first_indexed | 2025-11-15T01:03:21Z |
| format | Article |
| id | oai:generic.eprints.org:25138 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:03:21Z |
| publishDate | 2024 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:251382025-05-26T08:27:19Z http://journalarticle.ukm.my/25138/ Optimizing coal ash as a sustainable substitute of cement and aggregate in structural concrete Fahad-ul-Rehman Abro, Abdul Salam Buller, Tariq Ali, Imran Ali Channa, Zain-ul-Abdin, Safeer Ahmad Zaheer, The manufacture of concrete for constructing the structures like highways, bridges, and buildings requires large amounts of cement and aggregates. This high concrete production depletes natural resources like sand and gravel for the construction industry. It also negatively impacts the environment due to cement usage. This study looked at using waste materials like coal bottom ash (CBA) and fly ash (FA) in concrete as substitutes for some of the typical aggregates and cement. The goal was to reduce the environmental impact and preserve natural resources. The study made concrete with regular Portland cement, sand, 10mm coarse aggregate, locally available CBA, and FA. 15% fly ash was selected as an optimal level from initial testing. The CBA was used to replace 0-35% of the fine aggregate sand. Test cubes and cylinders were made with different mixes. Compressive strength, tensile strength, carbonation, and sulfate attack tests were done after curing. Results showed 25% CBA improved the concrete’s mechanical performance. The compressive and tensile strengths increased but not above conventional concrete. This is because CBA needs more moisture for full hydration over longer curing times. Also, the concrete’s durability improved in terms of resistance to carbonation and sulfate attack. Penerbit Universiti Kebangsaan Malaysia 2024 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/25138/1/18.pdf Fahad-ul-Rehman Abro, and Abdul Salam Buller, and Tariq Ali, and Imran Ali Channa, and Zain-ul-Abdin, and Safeer Ahmad Zaheer, (2024) Optimizing coal ash as a sustainable substitute of cement and aggregate in structural concrete. Jurnal Kejuruteraan, 36 (1). pp. 191-198. ISSN 0128-0198 https://www.ukm.my/jkukm/volume-3601-2024 |
| spellingShingle | Fahad-ul-Rehman Abro, Abdul Salam Buller, Tariq Ali, Imran Ali Channa, Zain-ul-Abdin, Safeer Ahmad Zaheer, Optimizing coal ash as a sustainable substitute of cement and aggregate in structural concrete |
| title | Optimizing coal ash as a sustainable substitute of
cement and aggregate in structural concrete |
| title_full | Optimizing coal ash as a sustainable substitute of
cement and aggregate in structural concrete |
| title_fullStr | Optimizing coal ash as a sustainable substitute of
cement and aggregate in structural concrete |
| title_full_unstemmed | Optimizing coal ash as a sustainable substitute of
cement and aggregate in structural concrete |
| title_short | Optimizing coal ash as a sustainable substitute of
cement and aggregate in structural concrete |
| title_sort | optimizing coal ash as a sustainable substitute of
cement and aggregate in structural concrete |
| url | http://journalarticle.ukm.my/25138/ http://journalarticle.ukm.my/25138/ http://journalarticle.ukm.my/25138/1/18.pdf |