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Cited by 15Hygrothermal properties of building materialsBuilding materials and conservationConcrete and Cement Materials Research

Microbiological Stability of Bio-Based Building Materials

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Obuka, Vaira, Sinka, Maris, Nikolajeva, Vizma, Kostjukova, Solvita, Ozola-Davidane, Ruta, Klavins, Maris·2021·Journal of Ecological Engineering
DOI 10.12911/22998993/134033
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Abstract

The aim of this paper was to study the microbiological stability of bio-based composite building materials, which are made using organic-rich lake sediments (further -sapropel) with lime and magnesium cement as binders and hemp shives as filler.The microbial stability properties of the obtained composite materials were investigated and compared to similar composites.Because of their high organic content, these materials are prone to biodegradation; therefore, they were coated with ALINA LIFE TM organoclay coating, which helps to extend the product life, reducing the rate of biodegradation compared to the biocides used in industry.The effect of the coating on the resistance to decay by the Aspergillus versicolor, Penicillium chrysogenum, Alternaria alternata, Cladosporium herbarum, Chaetomium sp. and Trichoderma asperellum fungi was investigated under different conditions: relative humidity modes of 75% and 99% at 20°C for 45 days and four months.The results indicated that the composites made of sapropel and lime have similar microbial stability properties as lime and magnesium cement binder composite materials.ALINA LIFE TM organoclay coating showed advanced resistance to biodegradation; sapropel-lime composites have shown several good properties that make them suitable to be considered for use in the construction material industry.

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  • The dried powdered plant material and prepared extracts showed no fungal growth and were free from microbial contamination.

    “The results indicated the absence of fungal growth, confirming that the plant material and extracts were free from microbial contamination and suitable for further experimental studies (Obuka et al., 2021).”

    From PHYTOCHEMICAL CHARACTERIZATION AND EVALUATION OF ANTIOXIDANT, ANTIMICROBIAL, ANTI-INFLAMMATORY, AND CYTOTOXIC ACTIVITIES OF SEQUENTIAL EXTRACTS FROM RIPE BANANA (MUSA PARADISIACA L.) PEEL (2026) · cites this paper as Obuka et al., 2021

    The Sample preparation and Microbiological stability tests sections (pages unavailable) describe bio-based building-material samples deliberately inoculated with fungi, not dried plant powder or prepared plant extracts. A search for powdered plant material, extracts, and microbial contamination found no passage testing whether those preparations were contamination-free. Fungal growth reported for the building materials does not establish the condition of the different preparations in the claim. (LLM, conf=0.76)

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Cited by

Sorted by citations

Authors
Obuka, V., Sinka, M., Nikolajeva, V., Kostjukova, S., Ozola-Davidane, R., & Klavins, M.
Affiliations
University of Latvia (LV)
Corresponding author
Obuka, Vaira
ORCID
Venue
Journal of Ecological Engineering
Publisher
WNGB Scientific Publishing House Sp. z o.o.
Published
2021-04-01
Volume
22
Issue
4
Pages
296-313
ISSN
  • 2081-139X (ISSN-L)
  • 2299-8993
DOI
10.12911/22998993/134033
OpenAlex
W3142548386
Cited by
15
References
0
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 1
FWCI
1.03
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Ecological Engineering (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • European Regional Development Fund
  • State Education Development Agency Republic of Latvia
Topics
  • Physical Sciences › Engineering › Building and Construction › Hygrothermal properties of building materials
  • Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Building materials and conservation
  • Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
Keywords
microbiological stability, bio-based building materials, sapropel, lime binder, magnesium cement, hemp shives, biodegradation resistance, fungal degradation, Aspergillus versicolor, Penicillium chrysogenum, Alternaria alternata, Cladosporium herbarum, Chaetomium, Trichoderma asperellum, relative humidity

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