Low-Carbon Concrete Based on Binary Biomass Ash–Silica Fume Binder to Produce Eco-Friendly Paving Blocks
| Autor: | Richard Rodrigues Barreto, Augusto Cesar da Silva Bezerra, André Henrique Campos Teixeira, Paulo Roberto Ribeiro Soares Junior, Thiago Henrique da Silva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Absorption of water Silica fume silica fume Abrasion (mechanical) 0211 other engineering and technologies Context (language use) 02 engineering and technology Raw material lcsh:Technology Article law.invention low-carbon concrete law 021105 building & construction General Materials Science lcsh:Microscopy lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T biomass ash alkali-activated material 021001 nanoscience & nanotechnology Pulp and paper industry Environmentally friendly Portland cement Compressive strength lcsh:TA1-2040 waste binary binder lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering eco-friendly paving block lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | Materials Volume 13 Issue 7 Materials, Vol 13, Iss 1534, p 1534 (2020) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13071534 |
| Popis: | The civil construction industry consumes huge amounts of raw materials and energy, especially infrastructure. Thus, the use of eco-friendly materials is indispensable to promote sustainable development. In this context, the present work investigated low-carbon concrete to produce eco-friendly paving blocks. The binder was defined according to two approaches. In the first, a binary binder developed with eucalyptus biomass ash (EBA) and silica fume (SF) was used, in total replacement for Portland cement. In the second, the mixture of residues was used as a precursor in alkali-activation reactions, forming alkali-activated binder. The experimental approach was carried out using five different mixtures, obtained by varying the amount of water or sodium hydroxide solution. The characterization of this new material was carried out using compressive strength, expandability, water absorption, deep abrasion, microstructural investigation, and organic matter degradation potential. The results showed that the EBA-SF system has a performance compatible with Portland cement when used as an alternative binder, in addition to functioning as a precursor to alkali-activated concrete. The blocks produced degraded organic matter, and this degradation is more intense with the incidence of UV. In this way, the EBA-SF binder can be successfully used for the manufacture of ecological paving blocks with low carbon emissions. |
| Databáze: | OpenAIRE |
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