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Effect of Ornamental Stone Waste Incorporation on the Rheology, Hydration, Microstructure, and CO2 Emissions of Ordinary Portland Cement.
Scolaro, Taylana Piccinini; Silvestro, Laura; Ruviaro, Artur Spat; de Azevedo, Afonso R G; Monteiro, Sergio Neves; Pelisser, Fernando.
Afiliación
  • Scolaro TP; Department of Civil Engineering, Federal University of Santa Catarina (UFSC), Rua João Pio Duarte Silva 151, Florianópolis 88040-900, Brazil.
  • Silvestro L; Laboratory of Nanotechnology Applications in Civil Construction (LabNANOTEC), Department of Civil Engineering, Federal University of Santa Catarina (UFSC), Rua João Pio Duarte Silva 151, Florianópolis 88040-900, Brazil.
  • Ruviaro AS; Laboratory of Nanotechnology Applications in Civil Construction (LabNANOTEC), Department of Civil Engineering, Federal University of Santa Catarina (UFSC), Rua João Pio Duarte Silva 151, Florianópolis 88040-900, Brazil.
  • de Azevedo ARG; Civil Engineering Laboratory (LECIV), State University of Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego 2000, Rio de Janeiro 28013-602, Brazil.
  • Monteiro SN; Department of Materials Science, Military Institute of Engineering (IME), Square General Tibúrcio 80, Rio de Janeiro 22290-270, Brazil.
  • Pelisser F; Laboratory of Nanotechnology Applications in Civil Construction (LabNANOTEC), Department of Civil Engineering, Federal University of Santa Catarina (UFSC), Rua João Pio Duarte Silva 151, Florianópolis 88040-900, Brazil.
Materials (Basel) ; 15(2)2022 Jan 06.
Article en En | MEDLINE | ID: mdl-35057120
The ornamental stone industry generates large amounts of waste thus creating environmental and human health hazards. Thus, pastes with 0-30 wt.% ornamental stone waste (OSW) incorporated into ordinary Portland cement (OPC) were produced and their rheological properties, hydration kinetics, and mechanical properties were evaluated. The CO2 equivalent emissions related to the pastes production were estimated for each composition. The results showed that the paste with 10 wt.% of OSW exhibited similar yield stress compared to the plain OPC paste, while pastes with 20 and 30 wt.% displayed reduced yield stresses up to 15%. OSW slightly enhanced the hydration kinetics compared to plain OPC, increasing the main heat flow peak and 90-h cumulative heat values. The incorporation of OSW reduced the 1-, 3-, and 28-days compressive strength of the pastes. Water absorption results agreed with the 28 days compressive strength results, indicating that OSW increased the volume of permeable voids. Finally, OSW incorporation progressively reduced the CO2 emission per m3 of OPC paste, reaching a 31% reduction for the highest 30 wt.% OSW content. Overall, incorporating up to 10 wt.% with OSW led to pastes with comparable fresh and hardened properties as comported to plain OPC paste.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Suiza
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Suiza