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Reuse of residual diatomaceous earth for the production of geopolymers - a review
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Advisor(s)
Abstract(s)
The high pollution levels produced by the manufacturing of conventional Portland cement have motivated several studies in an attempt to modernize this process with alternative binders such as cements based on use of alkaline activation of aluminosilicates. The reaction between aluminosilicates (such as metakaolin, fly ash and blast furnace slag) and an alkaline solution (sodium hydroxide or potassium hydroxide) triggers a geopolymerization process, developing a material with good mechanical and thermal properties, with a vast spectrum of applications in construction, helping in the reduction of the environmental impact and due to it, lower carbon footprint. Most geopolymer concrete was focused on fly ashes, metakaolin and blast furnace slag, this paper focuses on use of residual diatomaceous earth in the manufacture of geopolymer concrete, which are very rich in aluminosilicates.
This review paper presents an extensive bibliographic review of studies related to the manufacture of geopolymer cements based on diatomaceous earth. The chemical composition of diatomaceous earth, density, surface area, absorption capacity, different drying methods and different calcination processes are investigated factors. Mortar blends based on diatomaceous earth, temperatures and curing times, physical and mechanical properties of the obtained samples are also subject to analysis.
Description
Keywords
Geopolymerization Residue valorisation Residual diatomaceous earth
Citation
Magalhães, Leandro; Ferreira, Débora; Luso, Eduarda; Lima, Óscar (2022). Reuse of residual diatomaceous earth for the production of geopolymers - a review. In 9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management Rehabend 2022. University of Granada (Spain)2
Publisher
UNIVERSITY OF CANTABRIA