Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste
Self-compacting concrete (SCC) is a relevant technology and an alternative to conventional concrete in complex structures due to its exceptional workability. The rheological parameters demonstrated by SCC provide high fluidity and cohesion, resulting in high mould-filling capability and segregation...
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MDPI AG
2025-01-01
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| author | Jemima Tabita F. de Sousa Marcos Alyssandro S. dos Anjos José Anselmo da S. Neto Evilane C. de Farias Fernando G. Branco Cinthia Maia Pederneiras |
| author_facet | Jemima Tabita F. de Sousa Marcos Alyssandro S. dos Anjos José Anselmo da S. Neto Evilane C. de Farias Fernando G. Branco Cinthia Maia Pederneiras |
| author_sort | Jemima Tabita F. de Sousa |
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| description | Self-compacting concrete (SCC) is a relevant technology and an alternative to conventional concrete in complex structures due to its exceptional workability. The rheological parameters demonstrated by SCC provide high fluidity and cohesion, resulting in high mould-filling capability and segregation resistance, as well as optimising concreting processes and reducing costs. In view of this, self-compacting lightweight concrete (SCLC) has emerged as a possible alternative as it combines the benefits of SCC and lightweight aggregate concrete (LWAC). In the production of LWC, the most widely used lightweight aggregate in the world, and also in Brazil, is still expanded clay; however, Brazilian production is restricted to the southeast region. In this context, previous studies have verified the feasibility of producing lightweight aggregates from the sintering of industrial waste and regional raw materials (Rio Grande do Norte/Brazil), such as sugarcane bagasse ash (SBA), scheelite mining residue (SMR), and local clay. Therefore, this study evaluates the influence of three lightweight aggregates, analysing their performance in comparison with SCLC produced with commercial lightweight aggregate (expanded clay). The concretes studied were subjected to characterisation tests in a fresh state; fluidity, apparent viscosity, visual stability, and passing ability were assessed through slump flow tests, flow time (T500), visual stability index, and J-ring, respectively, as well as measurement of the fresh specific mass. In the hardened state, tests were carried out to determine the compressive strength at 7 and 28 days, the dry specific mass, the chloride ion diffusion coefficient, and the thermal conductivity. The new concretes had density values ranging from 1.94 to 2.03 g/cm<sup>3</sup> and compressive strength values at 28 days between 26.11 and 36.72 MPa. The results obtained show that it is feasible to produce SCLC with unconventional lightweight aggregates based on sugarcane bagasse waste and scheelite mining waste. |
| format | Article |
| id | doaj-art-32c680f3a0b549b5884323e8d25a881b |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-32c680f3a0b549b5884323e8d25a881b2025-01-10T13:15:37ZengMDPI AGApplied Sciences2076-34172025-01-0115145210.3390/app15010452Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining WasteJemima Tabita F. de Sousa0Marcos Alyssandro S. dos Anjos1José Anselmo da S. Neto2Evilane C. de Farias3Fernando G. Branco4Cinthia Maia Pederneiras5Department of Civil Engineering, Federal University of Rio Grande do Norte (UFRN), Natal 59078-970, BrazilDepartment of Civil Engineering, Federal Institute of Education, Science and Technology of Paraíba (IFPB), João Pessoa 58015-435, BrazilDepartment of Materials Engineering, Federal University of Paraíba (UFPB), João Pessoa 58051-900, BrazilDepartment of Civil Engineering, Federal Institute of Education Science and Technology of Rio Grande do Norte (IFRN), Natal 59078-970, BrazilISISE ARISE Department of Civil Engineering, University of Coimbra, 3000-370 Coimbra, Portugalc5Lab Sustainable Construction Materials Association, 2795-242 Amadora, PortugalSelf-compacting concrete (SCC) is a relevant technology and an alternative to conventional concrete in complex structures due to its exceptional workability. The rheological parameters demonstrated by SCC provide high fluidity and cohesion, resulting in high mould-filling capability and segregation resistance, as well as optimising concreting processes and reducing costs. In view of this, self-compacting lightweight concrete (SCLC) has emerged as a possible alternative as it combines the benefits of SCC and lightweight aggregate concrete (LWAC). In the production of LWC, the most widely used lightweight aggregate in the world, and also in Brazil, is still expanded clay; however, Brazilian production is restricted to the southeast region. In this context, previous studies have verified the feasibility of producing lightweight aggregates from the sintering of industrial waste and regional raw materials (Rio Grande do Norte/Brazil), such as sugarcane bagasse ash (SBA), scheelite mining residue (SMR), and local clay. Therefore, this study evaluates the influence of three lightweight aggregates, analysing their performance in comparison with SCLC produced with commercial lightweight aggregate (expanded clay). The concretes studied were subjected to characterisation tests in a fresh state; fluidity, apparent viscosity, visual stability, and passing ability were assessed through slump flow tests, flow time (T500), visual stability index, and J-ring, respectively, as well as measurement of the fresh specific mass. In the hardened state, tests were carried out to determine the compressive strength at 7 and 28 days, the dry specific mass, the chloride ion diffusion coefficient, and the thermal conductivity. The new concretes had density values ranging from 1.94 to 2.03 g/cm<sup>3</sup> and compressive strength values at 28 days between 26.11 and 36.72 MPa. The results obtained show that it is feasible to produce SCLC with unconventional lightweight aggregates based on sugarcane bagasse waste and scheelite mining waste.https://www.mdpi.com/2076-3417/15/1/452self-compacting lightweight concreteartificial lightweight aggregatessugarcane bagasse ashscheelite residueexpanded clay |
| spellingShingle | Jemima Tabita F. de Sousa Marcos Alyssandro S. dos Anjos José Anselmo da S. Neto Evilane C. de Farias Fernando G. Branco Cinthia Maia Pederneiras Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste Applied Sciences self-compacting lightweight concrete artificial lightweight aggregates sugarcane bagasse ash scheelite residue expanded clay |
| title | Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste |
| title_full | Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste |
| title_fullStr | Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste |
| title_full_unstemmed | Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste |
| title_short | Self-Compacting Concrete with Artificial Lightweight Aggregates from Sugarcane Ash and Calcined Scheelite Mining Waste |
| title_sort | self compacting concrete with artificial lightweight aggregates from sugarcane ash and calcined scheelite mining waste |
| topic | self-compacting lightweight concrete artificial lightweight aggregates sugarcane bagasse ash scheelite residue expanded clay |
| url | https://www.mdpi.com/2076-3417/15/1/452 |
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