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RESUMO :  A crescente necessidade de gerar economia e aumentar a produtividade na construcao civil tem incentivado a busca por meios e metodos alternativos, o que aumentou a atencao direcionada a materiais mais eficientes, inclusive quanto ao aspecto da sustentabilidade ambiental. O objetivo deste trabalho e quantificar as emissoes de CO 2 dos sistemas de vedacao horizontal interna utilizados em edificacoes habitacionais, ou mais precisamente, sistemas de forros de gesso acartonado e de PVC, comparativamente ao forro de madeira. Para o alcance deste objetivo utilizou-se a metodologia ACVCO 2 , com analise hibrida, dados secundarios e dimensionamentos comerciais. O sistema de forro de madeira apresentou emissoes 26% maiores que a do PVC e 67% maiores que a do gesso. Este trabalho chama a atencao para os sistemas de vedacoes horizontais internas e a preocupacao com outros materiais da construcao civil cujo impacto e tao preocupante quando o do cimento. ABSTRACT : The growing need to provide savings and increase productivity in the construction industry has encouraged the search for alternative means and methods, increasing the pursuit for more efficient materials, especially under the aspect of environmental sustainability. The objective of this work is to quantify the CO 2 emissions of the internal horizontal sealing systems used in residential buildings, or more accurately, ceiling linings of gypsum plasterboard and PVC, compared to the timber lining. To reach this objective, the ACVCO 2 methodology was applied, with hybrid analysis, secondary data and following commercial standards. The timber lining system presented emissions 26% higher than that of PVC and 67% higher than that of gypsum. This paper draws attention to the internal horizontal sealing systems and the concern with other building materials whose impact is as concerning as that of cement.

reec - revista eletrônica de engenharia civil

Forros de gesso e PVC comparativamente ao forro de madeira: avaliação do ciclo de vida de emissões de CO2 [Gypsum and PVC ceiling linings comparatively to timber ceiling linings: life cycle carbon emissions assessment]