Química Nova (Jan 2009)

Biofouling e biodeterioração química de argamassa de cimento portland em reservatório de usina hidroelétrica Biofouling and chemical biodeterioration in hydroeletric power plant portland cement mortar

  • Kleber Franke Portella,
  • Alex Joukoski,
  • Ariel Scheffer da Silva,
  • Nicole Machuca Brassac,
  • Carlos Eduardo Belz

DOI
https://doi.org/10.1590/S0100-40422009000400037
Journal volume & issue
Vol. 32, no. 4
pp. 1047 – 1051

Abstract

Read online

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.

Keywords