Biofouling and chemical biodeterioration in hydroeletric power plant portland cement mortar

Quimica nova

Joukoski, Alex¹  Portella, Kleber Franke¹  Silva, Ariel Scheffer da¹  Belz, Carlos Eduardo¹  Brassac, Nicole Machuca¹ 

[1] Instituto de Tecnologia para o Desenvolvimento, Curitiba, Brasil

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 Brazilianrivers experimented progressive biofouling of Limnoperna fortunei communitiesand Cordylophora caspia hydroids. The microhabitat is so favorable thatin around 1.5 years L. fortunei increased from 0.39 to nearby 149,000units/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 Plantreservoir in 0.5 m and 1.0 m deep to investigate the biofouling influence onhydraulic civil structures. SEM, EDS, visual investigation and XRF results indicatenone direct chemical interrelationships between L. fortunei and the mortarsamples. However C. caspia diminished the mortar surface resistance andcaused cement paste leaching.

【 授权许可】

CC BY