Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Biobased Alternative Binders from Agar for Civil Engineering Applications: Thermal, Biodeterioration, and Moisture Sorption Properties
This work evaluated the properties of agar, a biopolymer extracted from red seaweeds, as a direct material alternative to petroleum-based construction binders and materials. The thermal and moisture sorption properties, along with their ability to resist biodeterioration by fungi, were evaluated and compared to petroleum-based materials. Thermogravimetric analysis indicated that the onset of thermal decomposition occurs at a slightly lower temperature for agar-based binders as compared to petroleum-based materials and binders. The addition of limestone filler was shown to significantly improve the thermal stability. When subjected to fungal deterioration testing, only traces of growth were observed on samples 28 days after inoculation, indicating that agar did not serve as a primary carbon source for the growth of heterotrophic microorganisms, which is known to lead to biodeterioration. Isothermal moisture sorption measurements were used to characterize sorption behavior of agar-based binders. In general, agar-based binders absorbed a large percentage of moisture relative to the dehydrated mass of samples. Chemically cross-linking agar with maleic anhydride was shown to reduce moisture absorption.
Biobased Alternative Binders from Agar for Civil Engineering Applications: Thermal, Biodeterioration, and Moisture Sorption Properties
This work evaluated the properties of agar, a biopolymer extracted from red seaweeds, as a direct material alternative to petroleum-based construction binders and materials. The thermal and moisture sorption properties, along with their ability to resist biodeterioration by fungi, were evaluated and compared to petroleum-based materials. Thermogravimetric analysis indicated that the onset of thermal decomposition occurs at a slightly lower temperature for agar-based binders as compared to petroleum-based materials and binders. The addition of limestone filler was shown to significantly improve the thermal stability. When subjected to fungal deterioration testing, only traces of growth were observed on samples 28 days after inoculation, indicating that agar did not serve as a primary carbon source for the growth of heterotrophic microorganisms, which is known to lead to biodeterioration. Isothermal moisture sorption measurements were used to characterize sorption behavior of agar-based binders. In general, agar-based binders absorbed a large percentage of moisture relative to the dehydrated mass of samples. Chemically cross-linking agar with maleic anhydride was shown to reduce moisture absorption.
Biobased Alternative Binders from Agar for Civil Engineering Applications: Thermal, Biodeterioration, and Moisture Sorption Properties
RILEM Bookseries
Amziane, Sofiane (Herausgeber:in) / Merta, Ildiko (Herausgeber:in) / Page, Jonathan (Herausgeber:in) / Frey, Melissa R. (Autor:in) / Williams, Sarah L. (Autor:in) / Torres-Machi, Cristina (Autor:in) / Srubar, Wil V. (Autor:in)
International Conference on Bio-Based Building Materials ; 2023 ; Vienna, Austria
14.06.2023
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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