Antifungal effects of cement mortars with two types of organic antifungal agents

Do, Jeongyun; Song, Hongbo; So, Hyoung-Seok; Soh, Yang-Seob

doi:10.1016/j.cemconres.2004.06.021

Cited by 24 publications

(17 citation statements)

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“…There is a necessity to develop standardized methods for the evaluation of nanomaterials regarding their potential ecotoxicity. On that basis, diverse methods dedicated to different materials (e.g., polymer materials) are being developed or adapted [ 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of Al2O3, CuO, Fe3O4, and ZnO Nanoparticles in Scope of Their Further Application in Cement-Based Building Materials

et al. 2018

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Nanoparticles were proposed as antibacterial cement admixtures for the production of cement-based composites. Nevertheless, the standards for evaluation of such admixtures still do not indicate which model organisms to use, particularly in regard to the further application of material. Apart from the known toxicity of nanomaterials, in the case of cement-based composites there are limitations associated with the mixing and dispersion of nanomaterials. Therefore, four nanooxides (Al2O3, CuO, Fe3O4, and ZnO) and seven microorganisms were tested to initially evaluate the applicability of nanooxides in relation to their further use in cement-based composites. Studies of nanoparticles included chemical analysis, microbial growth kinetics, 4- and 24 h toxicity, and biofilm formation assay. Nanooxides showed toxicity against microorganisms in the used concentration, although the populations were able to re-grow. Furthermore, the effect of action was variable even between strains from the same genus. The effect of nanoparticles on biofilms depended on the used strain. Gathered results show several problems that can occur while studying nanoparticles for specific further application. Proper protocols for nanomaterial dispersion prior the preparation of cement-based composites, as well as a standardized approach for their testing, are the fundamental issues that have to be resolved to produce efficient composites.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of Al2O3, CuO, Fe3O4, and ZnO Nanoparticles in Scope of Their Further Application in Cement-Based Building Materials

et al. 2018

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“…As the surface pH of the 28-day-old mortar specimens was too high (pH 12-13) to allow bacterial growth, specimens used for the viability assay (see further) were subjected to a commonly used aging method, i.e. accelerated carbonation, prior to the assay (Do et al 2005;Escadeillas et al 2007). Carbonation results in the conversion of calcium hydroxide to calcium carbonate and concomitantly in a decrease in the pH level.…”

Section: Mortar Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…These authors noticed an inhibition of the growth of Aspergillus niger, Staphylococcus aureus and Escherichia coli when a piece of antimicrobial concrete was placed on inoculated agar plates. Do et al (2005) investigated the antifungal effects of cement mortars containing organic antifungal agents. While a good antifungal effect was observed for the mortars containing isothiazoline and carbamate, no inhibitory effect was observed for the nitrofuran-containing mortars.…”

Section: Introductionmentioning

confidence: 99%

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Antimicrobial mortar surfaces for the improvement of hygienic conditions

Muynck

Belie

Verstraete

2010

Journal of Applied Microbiology

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Aims: To evaluate the effectiveness of various antimicrobial mortar formulations in inhibiting the growth of a selection of pathogens of environmental and hygienic concern. Methods and Results: Mortar prisms containing triclosan‐incorporated fibres or different concentrations of silver copper zeolites were incubated with Escherichia coli, Listeria monocytogenes, Salmonella enterica or Staphylococcus aureus at 4 or 20°C for 24 h. From plate counting, a substantial bactericidal effect (>4 log units) could only be observed for the mortar specimens containing more than 3% zeolites on cement weight base, the effect being more pronounced at 20°C compared to 4°C. No inhibitory effect could be observed for mortar specimens containing antimicrobial fibres. Adenosinetriphosphate (ATP) measurements allowed for a rapid indication of the occurrence of antimicrobial activity. Conclusions: In order to obtain a bactericidal effect on mortar surfaces, concentrations of silver copper zeolites of more then 3% are required. Significance and Impact of the Study: To our knowledge, this is the first study in which the effectiveness of various antimicrobial mortar mixtures towards the inhibition of pathogens has been evaluated in a quantitative way. Antimicrobial concrete mixtures can be used for the improvement of the hygienic conditions in a variety of environments.

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“…이와 별개로 미생물의 대사 및 생장에 의한 건축물 생물열화를 막기 위해 azole, carbamate, zeolite, zeolite carbon, silver 및 copper 등 유․무기 항 미생물 재제를 시멘트 양생 시 혼입하는 등에 관한 연구가 수행되어 왔다 [4,7,26].…”

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Assessment of Bio-corrosive Effect and Determination of Controlling Targets among Microflora for Application of Multi-functional CFB on Cement Structure

박종명¹,

박성진

김사열³

2015

Journal of Life Science

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The use of calcite-forming bacteria (CFB) in crack remediation and durability improvements in construction materials creates a permanent and environmentally-friendly material. Therefore, research into this type of application is stimulating interdisciplinary studies between microbiology and architectural engineering. However, the mechanisms giving rise to these materials are dependent on calcite precipitation by the metabolism of the CFB, which raises concerns about possible hazards to cement-based construction due to microbial metabolic acid production. The aim of this study was to determine target microorganisms that possibly can have bio-corrosive effects on cement mortar and to assess multi-functional CFBs for their safe application to cement structures. The chalky test was first used to evaluate the CaCO3 solubilization feature of construction sites by fungi, yeast, bacterial strains. Not all bacterial strains are able to solubilize CaCO3, but C. sphaerospermum KNUC253 or P. prolifica KNUC263 showed CaCO3 solubilization activity. Therefore, these two strains were identified as target microorganisms that require control in cement structures. The registered patented strains Bacillus aryabhatti KNUC205, Arthrobacter nicotianae KNUC2100, B. thuringiensis KNUC2103 and Stenotrophomonas maltophilia KNUC2106, reported as multifunctional CFB (fungal growth inhibition, crack remediation, and water permeability reduction of cement surfaces) and isolated from Dokdo or construction site were unable to solubilize CaCO3. Notably, B. aryabhatti KNUC205 and A. nicotianae KNUC2100 could not hydrolyze cellulose or protein, which can be the major constituent macromolecules of internal materials for buildings. These results show that several reported multi-functional CFB can be applied to cement structures or diverse building environments without corrosive or bio-deteriorative risks. 3, 5, 8, 9, 11, 12, 15, 18-21, 27-28, 30, 33, 34] Key words

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Antifungal effects of cement mortars with two types of organic antifungal agents

Cited by 24 publications

References 1 publication

Antimicrobial Activity of Al2O3, CuO, Fe3O4, and ZnO Nanoparticles in Scope of Their Further Application in Cement-Based Building Materials

Antimicrobial Activity of Al2O3, CuO, Fe3O4, and ZnO Nanoparticles in Scope of Their Further Application in Cement-Based Building Materials

Antimicrobial mortar surfaces for the improvement of hygienic conditions

Assessment of Bio-corrosive Effect and Determination of Controlling Targets among Microflora for Application of Multi-functional CFB on Cement Structure

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