Effect of polyacrylonitrile fiber on the properties of alkali-activated ceramic/slag-based mortar
| Autor: | Tiago F. S. Miranda, Vitor M. C. F. Cunha, Eduardo Pereira, Dinis Leitão, Norma Gaibor, Nuno Cristelo |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Rok vydání: | 2021 |
| Předmět: |
Toughness
Materials science Curing (food preservation) 0211 other engineering and technologies Mechanical properties 02 engineering and technology Slag chemistry.chemical_compound Flexural strength Engenharia e Tecnologia::Engenharia Civil 021105 building & construction Architecture Ultimate tensile strength Fiber Ceramic Composite material Safety Risk Reliability and Quality Civil and Structural Engineering Science & Technology PAN fibers Alkali-activation Polyacrylonitrile Building and Construction Microstructural characterization 021001 nanoscience & nanotechnology Ceramic waste chemistry 13. Climate action Mechanics of Materials visual_art Engenharia Civil [Engenharia e Tecnologia] visual_art.visual_art_medium Mortar 0210 nano-technology |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 2352-7102 |
| DOI: | 10.1016/j.jobe.2021.103367 |
| Popis: | This study aims to optimize the mechanical behavior of alkali-activated mortar reinforced with polyacrylonitrile fibers. In order to accomplish this, ceramic waste from clay bricks and roof tiles was used as the primary pre- cursor, which was then combined with ladle furnace slag and activated with sodium silicate. Thereby, fibers were added to improve its brittle behavior, namely its toughness and the residual flexural strength of the material, thus enabling its use in a myriad of applications within the construction sector. So, an extensive experimental campaign was carried out to assess the influence of polyacrylonitrile fibers content (0%, 0.5%, and 1% in vol- ume) and the curing time (14, 28, and 90 days) on the main physical and mechanical properties, including capillarity, porosity, uniaxial compressive, and flexural strength. Microstructural analysis was accomplished with Scanning Electron Microscopy, X-ray Energy Dispersive Analyzer, X-ray diffraction, and Fourier Transform Infrared Spectroscopy. Experimental results of the developed mortars showed satisfactory mechanical properties, enhanced by the fibers, regardless of the fiber ratio added, attaining compressive and tensile under flexural strengths? values up to 47 MPa and 7 N/mm2, respectively, after 90 days of curing. Compared to non-reinforced mortars, these values represent an improvement of about 20% in both cases, thus justifying the addition of fibers. This work was supported by the research project "NextSea-Next generation monitoring of coastal systems in a scenario of global changes," reference NORTE-01-0145-FEDER-000032, through funds from NORTE 2020 (Programa Operacional Regional do Norte) and FEDER (European Regional Development Fund), as well as from the Secretary of Higher Education, Science, Technology and Innovation, SENESCYT (Spanish acronym) from Ecuador, reference No. CZ03-000052-2017, The authors would also like to acknowledge the contribution of the company SGL Carbon Composites, SA, and "Ceramica Amaro Macedo" Company in Portugal for the supply of the polyacrylonitrile (PAN) fibers and the ceramic waste, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect