Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures
This study investigated the mechanical and microstructural properties of lightweight aggregate geo-polymer concrete (LWAGC) produced by alkali-activating glass powder (GP) and Fly Ash (FA) at elevated temperatures ranging from 200 to 800�C. It also examined the effects of incorporating crushed foam...
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my.uniten.dspace-363272025-03-03T15:41:57Z Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures Turkey F.A. Beddu S. Al-Hubboubi S.K. Basri H.B. Sidek L.M. Ahmed A.N. 57819385900 55812080500 57202304860 57065823300 35070506500 57214837520 Compressive strength Concrete aggregates Demolition Glass Light weight concrete Recycling Water absorption Aggregate type Concrete masonry Elevated temperature Foam concretes Glass Powder High-temperature exposure Lightweight aggregate geo-polymer concrete Lightweight aggregates Polymer concretes Rock aggregates Fly ash This study investigated the mechanical and microstructural properties of lightweight aggregate geo-polymer concrete (LWAGC) produced by alkali-activating glass powder (GP) and Fly Ash (FA) at elevated temperatures ranging from 200 to 800�C. It also examined the effects of incorporating crushed foam masonry (RFA) and crushed porcelanite rock aggregates (PA) into FA and GP-based geo-polymer concrete, both before and after exposure to ambient and high temperatures. A low-calcium type of FA was used as a binder in the geo-polymer concrete paste, with a 10 % replacement of glass powder. The concrete samples were heated at temperatures of 200�C, 400�C, 550�C, and 800�C for a duration of 60 minutes, with a heating rate of 7�C per minute. It was observed that the inclusion of weaker coarse aggregate resulted in a reduction of the compressive strength of the concrete. The geo-polymer concrete was subjected to tests for water absorption, mass loss, cracking, and microstructure analysis at elevated temperatures. The findings indicate that at heating temperatures of 400�C and above, the geo-polymer concrete underwent degradation and dehydration. The test findings also revealed residual compressive strengths of 104.9 %, 97.2 %, 81.8 %, and 64.2 % for the (RFA) types, and 107.3 %, 94.8 %, 78.3 %, and 58.8 % for the (PA) types. Additionally, the density decreased by 1.02 %, 4.88 %, 8.10 %, and 13.88 % for (RFA) and (PA) types, respectively, and by 0.27 %, 1.91 %, 4.67 %, and 10.79 % overall. The results indicate that the compressive strength of the concretes increased after exposure to elevated temperatures of 35�C and 200�C. However, when exposed to temperatures ranging from 400�C to 800�C, the strength of the LWAGC started to degrade and decline. Based on the obtained findings, the present study recommends performing laboratory tests on construction waste generated during demolition while developing and evaluating numerical models that predict the behavior of the resulting demolition materials when incorporated in the production of geo-polymer concrete. ? 2024 The Authors Final 2025-03-03T07:41:57Z 2025-03-03T07:41:57Z 2024 Article 10.1016/j.aej.2024.06.043 2-s2.0-85197393290 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197393290&doi=10.1016%2fj.aej.2024.06.043&partnerID=40&md5=710e5bb3766b2bc28e93a00d94d35178 https://irepository.uniten.edu.my/handle/123456789/36327 105 171 180 Elsevier B.V. Scopus |
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Compressive strength Concrete aggregates Demolition Glass Light weight concrete Recycling Water absorption Aggregate type Concrete masonry Elevated temperature Foam concretes Glass Powder High-temperature exposure Lightweight aggregate geo-polymer concrete Lightweight aggregates Polymer concretes Rock aggregates Fly ash |
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Compressive strength Concrete aggregates Demolition Glass Light weight concrete Recycling Water absorption Aggregate type Concrete masonry Elevated temperature Foam concretes Glass Powder High-temperature exposure Lightweight aggregate geo-polymer concrete Lightweight aggregates Polymer concretes Rock aggregates Fly ash Turkey F.A. Beddu S. Al-Hubboubi S.K. Basri H.B. Sidek L.M. Ahmed A.N. Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
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This study investigated the mechanical and microstructural properties of lightweight aggregate geo-polymer concrete (LWAGC) produced by alkali-activating glass powder (GP) and Fly Ash (FA) at elevated temperatures ranging from 200 to 800�C. It also examined the effects of incorporating crushed foam masonry (RFA) and crushed porcelanite rock aggregates (PA) into FA and GP-based geo-polymer concrete, both before and after exposure to ambient and high temperatures. A low-calcium type of FA was used as a binder in the geo-polymer concrete paste, with a 10 % replacement of glass powder. The concrete samples were heated at temperatures of 200�C, 400�C, 550�C, and 800�C for a duration of 60 minutes, with a heating rate of 7�C per minute. It was observed that the inclusion of weaker coarse aggregate resulted in a reduction of the compressive strength of the concrete. The geo-polymer concrete was subjected to tests for water absorption, mass loss, cracking, and microstructure analysis at elevated temperatures. The findings indicate that at heating temperatures of 400�C and above, the geo-polymer concrete underwent degradation and dehydration. The test findings also revealed residual compressive strengths of 104.9 %, 97.2 %, 81.8 %, and 64.2 % for the (RFA) types, and 107.3 %, 94.8 %, 78.3 %, and 58.8 % for the (PA) types. Additionally, the density decreased by 1.02 %, 4.88 %, 8.10 %, and 13.88 % for (RFA) and (PA) types, respectively, and by 0.27 %, 1.91 %, 4.67 %, and 10.79 % overall. The results indicate that the compressive strength of the concretes increased after exposure to elevated temperatures of 35�C and 200�C. However, when exposed to temperatures ranging from 400�C to 800�C, the strength of the LWAGC started to degrade and decline. Based on the obtained findings, the present study recommends performing laboratory tests on construction waste generated during demolition while developing and evaluating numerical models that predict the behavior of the resulting demolition materials when incorporated in the production of geo-polymer concrete. ? 2024 The Authors |
| author2 |
57819385900 |
| author_facet |
57819385900 Turkey F.A. Beddu S. Al-Hubboubi S.K. Basri H.B. Sidek L.M. Ahmed A.N. |
| format |
Article |
| author |
Turkey F.A. Beddu S. Al-Hubboubi S.K. Basri H.B. Sidek L.M. Ahmed A.N. |
| author_sort |
Turkey F.A. |
| title |
Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
| title_short |
Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
| title_full |
Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
| title_fullStr |
Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
| title_full_unstemmed |
Recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
| title_sort |
recycled foam concrete masonry and porcelanite rocks-based lightweight geo-polymer concrete at elevated temperatures |
| publisher |
Elsevier B.V. |
| publishDate |
2025 |
| _version_ |
1825816058993311744 |
| score |
13.244109 |