PROTECTION OF THE CAST BASALT SEWERS FOR ENHANCING RESISTANCE TO BIOCORROSION

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU133435" target="_blank" >RIV/00216305:26110/19:PU133435 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

PROTECTION OF THE CAST BASALT SEWERS FOR ENHANCING RESISTANCE TO BIOCORROSION

Original language description

The concrete and masonry walls of sewers, in addition to the bases, are not only exposed to sulphates from wastewater but also to highly aggressive sulfuric acid, which is a consequence of bacterial biogenic corrosion. The most effective solution for preventing sewer defects involves the use of highly durable building materials (e.g. cast basalt tiles and profiles) and consistent details, or, joints solving. The cast basalt elements show both high abrasion resistance and high resistance to chemical stress. However, a problem with chemical resistance can occur when dealing with details (e.g. solving brick grouting). This paper deals with the rehabilitation of sewers, which can be severely degraded largely due to chemical stress, or, biocorrosion. The problem of significant biocorrosion can be caused by restricting sewerage ventilation to the surface, which results in increased concentrations of moisture, hazardous gases and aerosol-generated gas. Cast basalt tiles are very smooth, meaning the aggressive precipitated liquid transfers into the joints, which then become highly chemically stressed. Cement-based joint grouts exhibit higher water absorption, meaning severe deterioration caused by the biocorrosion occurs in the joints. A strongly acidic environment (up to pH 1) can be measured on the surface of the air chamber sewer facing. For this reason, it is necessary to use highly resistant jointing grout materials. Here, the presented solution is built on epoxy resin-based composites that are resistant to chemical loads and can also be applied to damp surfaces, and which, after curing, will exhibit high cleanability and non-absorbability.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

PROCEEDINGS OF THE SEVENTH INTERNATIONAL COLLOQUIUM ON PERFORMANCE, PROTECTION AND STRENGTHENING OF STRUCTURES UNDER EXTREME LOADING AND EVENTS

ISBN

978-0-88865-341-3

ISSN

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e-ISSN

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Number of pages

12

Pages from-to

1-12

Publisher name

The University of British Columbia

Place of publication

Whistler, Kanada

Event location

Whistler, Kanada

Event date

Sep 15, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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