Biofouling and chemical biodeterioration in hydroeletric power plant portland cement mortar

Química Nova

Instituto de Tecnologia para o Desenvolvimento, Curitiba, Brasil¹  Joukoski, Alex¹  Belz, Carlos Eduardo¹  Portella, Kleber Franke¹  Silva, Ariel Scheffer da¹  Brassac, Nicole Machuca¹ 

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

DOI  :  10.1590/S0100-40422009000400037

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown