Assessment of the consequences of the concrete production in Brazil for the climate change. / Avaliação das conseqüências da produção de concreto no Brasil para as mudanças climáticas.

AUTOR(ES)

José Antonio Ribeiro de Lima

DATA DE PUBLICAÇÃO

2010

RESUMO

The Brazilian concrete sector contributes to the climate change due to its CO2 emissions, that can be reduced through efforts of the cement sector, that have been receiving great attention. But the use of the cement in concrete can increase its consumption if made in the wrong way, and this can increase the CO2 emissions, making important the study of the emissions in concrete and the study of the possibilities of mitigation. These were the main aims of this thesis, that demonstrated that the CO2 reduction potential in the concrete have the same magnitude of the potential in the cement. The emission in the concrete, in Brazil, is 224 kgCO2/t. In cement, is 659 kgCO2/t, that is lower than the global emission and can be reduced by changes in the fuels used in the cement production. The Brazilian cement sector can reduce its emission in 20% and, using only biomass as fuel, this reduction can reach 30%, but this is not possible, yet. Emission reduction in the concrete production and use may reach 30%, through better preparation of concretes and reducing waste of material in constructions. This value is similar to the emission mitigation in the cement sector.

ASSUNTO(S)

mudanças climáticas emissão de co2 climate changes co2 emission concrete cimento cement concreto

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