Biofouling e biodeterioração química de argamassa de cimento portland em reservatório de usina hidroelétrica

Química Nova

Kleber Franke Portella²  Alex Joukoski²  Ariel Scheffer Da Silva¹  Nicole Machuca Brassac¹  Carlos Eduardo Belz¹ 

[1] ,Instituto de Tecnologia para o Desenvolvimento Departamento de Tecnologia em Materiais Curitiba PR ,Brasil

关键词: Portland cement mortar;    biofouling;    Limnoperna fortunei;   

DOI  :  10.1590/S0100-40422009000400037

来源: SciELO

【 摘 要 】

Last decade Brazilian rivers experimented progressive biofouling of Limnoperna fortunei communities and Cordylophora caspia hydroids. The microhabitat is so favorable that in around 1.5 years L. fortunei increased from 0.39 to nearby 149,000 units/m². Ten Portland cement mortar samples were produced with 1: 3.5: 0.4 dosages and installed for 1 year at Salto Caxias Brazilian Power Plant reservoir in 0.5 m and 1.0 m deep to investigate the biofouling influence on hydraulic civil structures. SEM, EDS, visual investigation and XRF results indicate none direct chemical interrelationships between L. fortunei and the mortar samples. However C. caspia diminished the mortar surface resistance and caused cement paste leaching.

【 授权许可】

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