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Title: Tobacco waste ash : A promising supplementary cementitious material
Authors: Moreno Yáñez, Paalo-Andrea
Fragozo, Rafael
Vesga, Sergio
Gonzalez, Mauricio
Hernández, Liliana
Gamboa, Ivan D.
Delgado Monroy, José-Antonio
Keywords: Concrete
Tobacco waste ash
Supplementary cementitious material
Sustainable construction material
Compressive strength
Design of experiments
Issue Date: 12-May-2018
Abstract: According to the European Cement Association, CEMBUREAU, in 2015, the global cement production was 4.6 billion tons. Traditional cement production emits approximately 1 ton of CO2 per ton of cement, which represents almost 80% of the total CO2 emissions of concrete and approximately 6% of the world’s emissions. Among supplementary cementitious materials, the use of agro-waste ash emerges due to its reduced CO2 emissions, chloride diffusion, and materials cost, in addition to its greater compressive strength. In Colombia, the disposal of agro-wastes, such as tobacco waste, is an environmental and economic concern. In this study, ash obtained from tobacco waste (TWA) was studied as a sustainable partial replacement for cement in hydraulic concrete. The TWA was reduced to a particle size of less than 75 μm and was characterized by X-ray florescence. A central composite design was used to study the influence of the ash replacement percentage of cement and the water/binder (w/b) ratio on the compressive strength at 28 days. The results show that it is possible to replace 10% of the cement with TWA using a 0.5 w/b ratio and obtain a 51% higher compressive strength than the control mixture at 28 days. Moreover, the experimental results demonstrated an improvement of 86% in the 7-day compressive strength when TWA was used.
Description: 6 p.
ISSN: 2251-6832
Appears in Collections:DEAAA. Artículos de Investigación

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