Effect of rice husk ash-derived activator on the structural build-up of alkali activated materials

Autor:	Ailar Hajimohammadi, Taehwan Kim, Mohammed Fouad Alnahhal, Abdelrahman Hamdan
Rok vydání:	2021
Předmět:	Residue (complex analysis) Sodium chemistry.chemical_element Slag Building and Construction Husk Silicate chemistry.chemical_compound Compressive strength Monomer chemistry visual_art Fly ash visual_art.visual_art_medium General Materials Science Nuclear chemistry
Zdroj:	Cement and Concrete Research. 150:106590
ISSN:	0008-8846
Popis:	Waste-derived sodium silicates (SSs) were synthesised from rice husk ash (RHA) to produce alkali activated materials (AAMs) using fly ash and slag as precursors. The effects of these SSs on the structural build-up were investigated by monitoring the evolution of the viscoelasticity, ultrasonic pulse waves, setting time, and infrared spectra. Two types of RHA derived SSs (filtered SS and unfiltered SS) were prepared to investigate the effect of the undissolved residue on the hardening process. The derived SS contained a large portion of monomer silicate species. The results showed that the structural build-up mechanism was comparable between the AAMs activated by the filtered SS and a commercial SS. The unfiltered SS increased the yield stress of the paste by up to 10 times. However, the residues in the unfiltered SS had insignificant impacts on the gel formation and compressive strength when using identical SiO2/Na2O and Na2O/binder ratios in the mix design.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a4f284f80e4406b08d7337a33f1ad36c https://doi.org/10.1016/j.cemconres.2021.106590 Zobrazit plný text záznamu Full Text from ScienceDirect