NDLI: Mould and phototroph growth on masonry façades after repainting

Please wait, while we are loading the content...

Discussion of the paper: ‘Predicting the performance of concrete structures exposed to chemically aggressive environment-field validation’, by J. Marchand, E. Samson, Y. Maltis, R.J. Lee and S. Sahu : Mater. Struct. 35 (December 2002) 623–631

Materials and Structures : Volume 37, Issue 6, July 2004

Materials and Structures : Volume 37, Issue 5, June 2004

Materials and Structures : Volume 37, Issue 4, May 2004

Materials and Structures : Volume 37, Issue 3, April 2004

Materials and Structures : Volume 37, Issue 2, March 2004

Materials and Structures : Volume 37, Issue 1, January 2004

Materials and Structures : Volume 36

Materials and Structures : Volume 35

Materials and Structures : Volume 34

Materials and Structures : Volume 33

Materials and Structures : Volume 32

Materials and Structures : Volume 31

Materials and Structures : Volume 30

Mould and phototroph growth on masonry façades after repainting

Content Provider	Springer Nature Link
Author	Shirakawa, M. A. John, V. M. Gaylarde, C. C. Gaylarde, P. Gambale, W.
Copyright Year	2004
Abstract	The appearance and durability of paint films are affected by microbial growth and fungi and phototrophs are considered to be especially important, degrading the films mechanically, by the production of metabolites, chiefly acids, and by enzymatic activity. In this study, fungi and phototrophs were identified before and throughout one year after painting two building façades in São Paulo. Disinfection with hypochlorite and high-pressure water jet cleaning of the façades caused reduction of at least 85% in the microbial population. Paint was applied with or without a biocide formulation (0.25% w/w)-carbendazin, N-octyl-2H-isothiazolin-3-one and N-(3,4-dichlorophenyl)N,N-dimethyl ure. The biocide reduced fungal colonization up to 10 months after painting on one building. However after 12 months biocide made no statistically significant difference. The major fungal contaminant was the genusCladosporium. After 10 monthsAureobasidium was also associated with black discoloration. On both the re-painted. façades, fungi were detected before phototrophs, contrary to the citations from the literature. SEM showed that fungal contamination was present not only on the surface, but between the old and new paint films and between old paint and rendering mortar. Under these conditions building façade details and micro-environment seem to be more important than biocide in controlling fungal growth.L'aspect et la durabilité des films de peinture sont affectés par l'action microbienne, les mycètes et le cyanobacteria étant considérés comme particulièrement importants, par la dégradation mécanique des films due à la production des métabolites, notamment les acides, et par l'activité enzymatique. Dans cette étude, des mycètes et les phototrophiques ont été identifiés avant et tout au long de l'année qui a suivi la peinture des façades des deux édifices de São Paulo. La désinfection de la façade par l'hypochlorite et le nettoyage à haute pression par jet d'eau ont causé une réduction de 85% de la population microbienne. Ensuite, la peinture a été appliquée avec ou sans formulation de biocide (carbendazin, urée de N-octyl-2H-isothiazolin-3-one et de N-(3,4-dichlorophenyl)N,N-dimethyl 0,25% m/m). Le biocide a réduit la colonisation fongique jusqu'à 10 mois. Cependant, après 12 mois, le biocide n'a pas présenté de différence statistiquement significative. Le contaminant fongique principal était le genreCladosporium. Après 10 mois, l'Aureobasidium a été également associé à la décoloration noire. Sur les deux façades peintes, des mycètes ont été détectés préalablement aux phototrophiques, contrairement aux citations de la littérature. L'observation au MEB a montré que la contamination fongique était présente sur la surface, entre le vieux film et le nouveau film de peinture et entre la vieille peinture et le mortier du revêtement. La conclusion de cette étude est que l'influence du micro-environnement et des caractéristiques de la façade semble être plus importante que l'action du biocide ajusté sur la croissance fongique.
Starting Page	472
Ending Page	479
Page Count	8
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	37
Issue Number	7
e-ISSN	18716873
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical and Applied Mechanics Structural Mechanics Mechanical Engineering Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Strength characteristics of stone masonry

Mechanical behaviour of ancient masonry

Shrinkage and creep of masonry mortar

Studies on brick masonry under compression

Micro VS. Macro Reinforcement of Brickwork Masonry

MS.D.2: Determination of masonry rebound hardness

MS.D.8: Electrical conductivity investigation of masonry

Fracture mechanics in the characterisation of brick masonry structures

On Earth Stabilization with Natural Polymers for Earth Masonry Construction

Mould and phototroph growth on masonry façades after repainting

Similar Documents

Strength characteristics of stone masonry

Mechanical behaviour of ancient masonry

Shrinkage and creep of masonry mortar

Studies on brick masonry under compression

Micro VS. Macro Reinforcement of Brickwork Masonry

MS.D.2: Determination of masonry rebound hardness

MS.D.8: Electrical conductivity investigation of masonry

Fracture mechanics in the characterisation of brick masonry structures

On Earth Stabilization with Natural Polymers for Earth Masonry Construction

Mould and phototroph growth on masonry façades after repainting