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Proceedings pro034 : International RILEM Conference on Microbial Impact on Building Materials


Title: International RILEM Conference on Microbial Impact on Building Materials
Edited by M. Ribas Silva
ISBN: 2-912143-43-8
e-ISBN: 2351580184
Pages: 108
Publication date: 2003

The impact of microorganisms on building materials was recognised many years ago for stones, metals and soil minerals. However, it is only in the last 15 years that biodeterioration of other important construction materials has been studied.

The big challenge for researchers in this field is to collaborate with experts in different areas, since biodeterioration research requires a knowledge of not only the microbiological mechanisms affecting the structure but also the material itself.

The first aim of the RILEM Technical Committee 183-MIB was to encourage the collaboration of a group of experts working in different fields such as Microbiology, Civil Engineering, Science of Materials, Chemistry and Geology. The majority of people working on biodeterioration of building materials were seen to be microbiologists. They are very organised and form many associations. However, it is necessary that more Material and Civil Engineers join these groups in order to help biologists to consider the properties of the building materials when studying the biological processes involved in biodeterioration.

The first meeting organised by RILEM TC 183-MIB was the International RILEM Workshop Microbial Impact on Building Materials, held in São Paulo, Brazil, in 2000. This second meeting deals with four themes, which cover the TC 183-MIB aim: techniques employed, biodeterioration of concrete and mortars, biodeterioration of different building materials, and prevention and treatment of biodeterioration of building materials.

The papers presented cover the following materials and areas:

1) Concrete: microbiological cleaning techniques, restoration and conservation of surfaces, chemical and physical deterioration by Limnoperna fortunei, proposal of methods for characterisation of algal growth, and damage processes caused by bacteria in sewage;
2) Mortar: colonisation by isolated Cladosporium sphaerospermum fungus;
3) Historical monuments: microbial and atmospheric effects, comparison of the relative role of atmospheric and biological impacts;
4) Timber: origin of fungal degradation and basic procedures to minimise these problems;
5) Several materials: preferences of lichen species.


Contents


Preface
Author(s): M. Ribas Silva
Pages: XI - XII

Theme I: Techniques used in the study of biodeterioration of building materials


Caractérisation en laboratoire de la croissance d'algues sur les parements en béton
Author(s): G. Escadeillas, A. Dubosc, P. Blanc
Pages: 3 - 12

The use of methods for material characterisation, surface analysis techniques and atmospheric aggressiveness assessment in the study of the biodeterioration of two sites of the cultural heritage of the city of Medellin, Colombia
Author(s): L . K. Herrera, C. E. Arroyave
Pages: 13 - 23

Theme II: Prevention and remedy against biodeterioration of building materials


Bacterial cleaning of concrete surfaces
Author(s): B. De Graef, W. De Windt, N. De Belie, W. Verstraete
Pages: 27 - 35

Theme III: Microbial impacts on concrete and mortars


Concrete deterioration by golden mussels
Author(s): M. Pérez, M. García, L. Traversa, M. Stupak
Pages: 39 - 47

Alteration of the concrete microstructure promoted by biodeterioration mechanisms
Author(s): S. M. M. Pinheiro, M. Ribas Silva
Pages: 48 - 57

Effect of cement type on bacteria induced acid attack in sewage networks
Author(s): K. Scrivener
Pages: 58 - 64

Theme IV: Microbial impact on different building materials


Biodeterioration and weathering of three different sites of the Latin American cultural heritage
Author(s): L. K. Herrera, H. A. Videla
Pages: 67 - 76

Lichens found on the bridge "La Postrera" across the Salado river, Cháscomús (Buenos Aires Province, Argentina)
Author(s): V. G. Rosato
Pages: 77 - 83

Fungal degradation of wood in buildings
Author(s): L; Nunes, H. Cruz
Pages: 84 - 93