Beach Sand: Alternative Filler in Metakaolin-Based Geopolymers

0542025 - ÚSMH 2022 RIV US eng J - Článek v odborném periodiku
Perná, Ivana - Novotná, Martina - Šupová, Monika - Hanzlíček, Tomáš
Beach Sand: Alternative Filler in Metakaolin-Based Geopolymers.
Journal of Materials in Civil Engineering. Roč. 33, č. 4 (2021), č. článku 04021017. ISSN 0899-1561. E-ISSN 1943-5533
Institucionální podpora: RVO:67985891
Klíčová slova: Geopolymer * Beach sand * Sustainability * Solidification * Infrared analysis * Mechanical properties
Obor OECD: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impakt faktor: 3.651, rok: 2021
Způsob publikování: Omezený přístup
https://ascelibrary.org/doi/pdf/10.1061/%28ASCE%29MT.1943-5533.0003641

The efforts toward sustainability of natural resources promote the use unexploited natural resources and raw materials. Beach sand, unsuitable as filler in concrete due to its salinity and generally uniform grain size, was tested as an alternative filler in geopolymer composites. The processability of the mixture determined the minimum and maximum amounts of beach sand (70 and 75 wt%, respectively). Geopolymer solids with the limit of sand content were studied in terms of stability and mechanical properties. Laboratory results corroborated the tendency of flexural and compressive strength to increase over time, with the maxima being 9.95 MPa for flexural and 64.1 MPa for compressive. Infrared analysis showed formation of geopolymer bonds even after the addition of beach sand. These findings offer a new potential for the use of beach sand in coastal areas as a local source of material for less demanding construction, such as seawalls.
Trvalý link: http://hdl.handle.net/11104/0319523