| Autor: |
Campos Teixeira AH; Department of Transports Engineering, Federal Centre for Technological Education of Minas Gerais, Belo Horizonte 30421-169, Brasil., Soares Junior PRR; Department of Materials Engineering, Federal Centre for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil., Silva TH; Department of Materials Engineering, Federal Centre for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil., Barreto RR; Department of Materials Engineering, Federal Centre for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil., Silva Bezerra ACD; Department of Transports Engineering, Federal Centre for Technological Education of Minas Gerais, Belo Horizonte 30421-169, Brasil. |
| Jazyk: |
angličtina |
| Zdroj: |
Materials (Basel, Switzerland) [Materials (Basel)] 2020 Mar 27; Vol. 13 (7). Date of Electronic Publication: 2020 Mar 27. |
| DOI: |
10.3390/ma13071534 |
| Abstrakt: |
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: |
MEDLINE |
| Externí odkaz: |
|
|
Nepřihlášeným uživatelům se plný text nezobrazuje |
K zobrazení výsledku je třeba se přihlásit.
|
