ZEOLITE ADDITION ON CONCRETE SUSTAINABILITY-A REVIEW

Civil engineering

One of the main reason of global warming is the emission of greenhouse gases. Out of these, Portland cement industry is responsible for 7% of global CO2 emission. So in order to reduce CO2 from cement industry, introduction of pozzalanic material as a replacement of cement is the main solution. Recently many studies were carried out on pozzalanic material as a partial replacement of cement. Some of them are flyash, GGBS, silica fume, Metakaolin etc. Recent research studies have given more focus on zeolite as a partial replacement for cement. Zeolite can be available naturally or can be synthesized artificially. Zeolite is an aluminosilicate minerals having infinite, open and three dimensional porous structure. Its structure has high influence on the strength development on concrete and a small proportion of zeolite on concrete provide higher strength. The use of zeolite in concrete decreased the global warming index compared to conventional concrete, which indicates the effectiveness of the consumption of zeolite in concrete to make concrete more environmentally friendly. The main aim of this paper, therefore, is to review the structure & properties of zeolite and the impact of zeolite addition on concrete for its mechanical properties, thermal properties, microscopic characteristics and its effect on sustainability.

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