What is it about?
The search for the application of alternative materials, that can partially replace cement and increase the service life of concrete structures, is necessary from the environmental and technological point of view. In this context, the partial substitution of cement in concretes by pozzolanic additions can be performed as ternary mixtures, such as the combined incorporation of glass powder and metakaolin, enabling the reduction of cement consumption and the minimisation of the CO2 emissions and the natural resources consumption. Therefore, this research evaluated the incorporation of glass powder and metakaolin in an isolated and combined way, as partial substitutes for cement in concretes.
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Why is it important?
There is a lack of studies involving the combined incorporation of glass powder and metakaolin regarding durability related properties, such as multi-method analysis of chloride penetration resistance and investigations with respect to alkali–silica reaction.
Perspectives
This research aims to contribute to the durability analysis of concrete, by performing several different methods, to evaluate the chloride ion penetration resistance in ternary mixtures (Portland cement, glass powder and metakaolin), and to estimate the service life (SL) from the chloride diffusion coefficients obtained. It also seeks to promote the reduction of environmental impacts related to the use of cement and the design of high-performance concretes capable of withstanding the saline mist, increasing the SL of these structures.
Guilherme GUIGNONE
Universidade Federal do Espirito Santo
Read the Original
This page is a summary of: Incorporation of glass powder and metakaolin as cement partial replacement to improve concrete mechanical properties and increase service life, Journal of Composite Materials, February 2020, SAGE Publications,
DOI: 10.1177/0021998320906873.
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