Beach Sand: Alternative Filler in Metakaolin-Based Geopolymers

0542025 - ÚSMH 2022 RIV US eng J - Journal Article
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
Institutional support: RVO:67985891
Keywords : Geopolymer * Beach sand * Sustainability * Solidification * Infrared analysis * Mechanical properties
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 3.651, year: 2021
Method of publishing: Limited access
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.
Permanent Link: http://hdl.handle.net/11104/0319523