Utilization of aquatic macrophytes in the adobe’s production: a case study in the Salto Grande reservoir (Americana – SP) / Utilização de macrófitas aquáticas na produção de adobe: um estudo de caso no reservatório de Salto Grande (Americana - SP)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

This work intends to optimise the utilization of aquatic macrophyte biomass in the adobe (a sun-dried mud brick) production, based on the study of the physical and mechanical characteristics of these bricks and the macrophytes biomass estimate as well as their chemical characteristics. The research was developed in the Salto Grande Reservoir region, in Americana (a town in São Paulo State, Brazil). This lake is located in an area of high urbanization and industrialization level, with common dwelling deficit, which is in advanced artificial eutrophication process by human activity action. The aquatic macrophytes found in that place (Brachiaria arrecta, Eichhornia crassipes and Pistia stratiotes) present a high level of heavy metals and nutrients that make impracticable their utilization as forage or fertilizer. The biomass utilization in the construction of materials appears here as an alternative of integrated management of the lake in the stabilization/solidification (or “encapsulation”) of these chemical substances, in addition to the fact that it makes possible the self-building of low cost dwellings. The other biomass function is to stabilize the soil that has a high clay concentration (59%, with 21% silt and 20% sandy) and would suffer a large drawing back during the drying process, with the introduction of excessive fissures. This biomass addition was made to reduce these fissures and the specific mass of the bricks. Besides, the research results show that, even though the adobe bricks are perhaps the oldest manufactured building material, their application persists practicable mainly in the sustainability hopes for being a completely ecological building material and adequate for the tropical regions.

ASSUNTO(S)

earth construction eutrofização de lagos materiais de construção integrated management of reservoirs building materials nutrientes construção em terra manejo integrado de reservatórios adobe lake eutrophication nutrients aquatic macrophytes macrófitas aquáticas

ACESSO AO ARTIGO

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