Life cycle analysis in concrete blocks: comparison of the impact produced between traditional blocks and blocks made with by-products

Abstract

Reusing by-products for the development of concrete blocks that are more sustainable and with better thermal properties, for the building sector is a necessity and a good alternative to develop in the construction sector. A life cycle analysis (LCA) was performed on the blocks with and without by-products, in order to quantify the environmental benefits that the incorporation of these by-products in the blocks would entail. The LCA was carried out in accordance with the provisions of EN-ISO 15804, which establishes the calculation rules for the analysis of construction products. This analysis was performed using the “Eco-it” software tool, with a scope from cradle to gate. Based on the results, it can be concluded that the partial replacement of fine aggregate by shavings and cement by lime sludge in the mix is an alternative way to obtain blocks that are more respectful with the environment and in turn with better thermal properties.