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Effect of cement type on bacteria induced acid attack in sewage networks



Title: Effect of cement type on bacteria induced acid attack in sewage networks
Author(s): K. Scrivener
Paper category : conference
Book title: RILEM International Conference on Microbial Impact on Building Materials
Editor(s): M. Ribas Silva
Print-ISBN: 2-912143-43-8
e-ISBN: 2351580184
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 58 - 64
Total Pages: 7
Nb references: 6
Language: English


Abstract: Acid attack in sewage systems may be very severe. It is caused by the growth of bacteria, which feed on H2S. This paper describes the damage process and how it is affected by different cement types. The use of calcium aluminate cements (CAC), is very effective in such situations as it limits the activity of the acid producing bacteria. This combined with the good acid resistance of this material is responsible for the excellent field performance of
CAC concrete in sewage systems. For example, a field trial carried out in South Africa over 12 years found complete destruction of pipe sections of Portland cement concretes, while the sections in CAC concrete had relatively modest damage of the concrete surface.


Online publication: 2003-07-03
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580184.006