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Diatomaceous earth as a partial replacement for portland cement in mortars - a review
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Orientador(es)
Resumo(s)
Over the last years, the increase in CO2 emissions into the atmosphere, its impact in climate change, and issues related to the sustainability and environmental impacts generated by the participation of construction industry in the global warming, which is responsible for about 8% of world CO2 emissions, have led to countless research, several of them looking for modernize cement production with alternative binders. In the present paper, it is researched the possibility of the use of diatomaceous earth as an alternative binder.
The most known alternative binders used nowadays in construction industry are slag, metakaolin and fly ashes. These materials are known for its pozzolanic properties, and when used in cement mixtures, they can improve the concrete and mortars mechanical characteristics. Focus of this paper, and very similar to metakaolin and fly ash, there is the residual diatomaceous earth, a material with high porosity and low thermal conductivity, with pozzolanic properties and another waste product that can be used in the construction sector.
Following the concept of sustainable construction, this work shows an extensive review of studies about introduction of residual diatomaceous earth in cement mortars, and the feasibility of using this material as a binder in cement mortars. Also, this paper brings details of some physical and mechanical properties of mortars made with diatomaceous earth, such as compression and flexural strength, and water absorption; and some features of residual diatomaceous earth like mineralogical analysis, chemical analysis, bulk density and particles size.
Descrição
Palavras-chave
Sustainability Waste valorisation Diatomaceous earth Cement mortars
Contexto Educativo
Citação
Magalhães, Leandro; Merelles, Samira; Ramos Gavilán, Ana; Ferreira, Débora (2024). Diatomaceous earth as a partial replacement for portland cement in mortars - a review. In 10TH Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management Rehabend 2024. Gijon.