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  • The immediate and short-term degradation of the wood surface in a cement environment measured by AFM
    Li, Juan ; Kasal, Bohumil
    This study aims to measure the pit torus and border to monitor the immediate and short-term degradation of wood surfaces after the concrete is cast and the cement hydration releases heat. The surface ... morphology and adhesion force curves were measured by atomic force microscopy during the treatments in saturated calcium hydroxide solutions ranging from 1 h to 27 days. The results showed that the pit torus and pit border showed different degradation processes. The adhesion force was sensitive to the type of the surface chemical components exposed during the degradation, while the surface modulus, deformation and jump-off force ratio were sensitive to the surface structural strength. The surface modulus of the pit torus degraded to 0.61–0.66 of the untreated original (95% CI) after 7-h treatments, and degraded almost completely after 48-h treatments. The surface modulus of the pit border degraded to 0.83–0.95 of the untreated original (CI) after 10 days and to 0.20–0.23 of the untreated original (95% CI) after 27 days of treatments. The treatment temperature 50 °C caused a 10-times faster degradation in the torus modulus compared to the temperature 20 °C.
    Source: Materials and structures = Matériaux et constructions. - ISSN 1359-5997 (Vol. 55, iss. 7, art. 179, 2022, str. 1-12)
    Type of material - article, component part ; adult, serious
    Publish date - 2022
    Language - english
    COBISS.SI-ID - 150364675

    Link(s):

    https://link.springer.com/article/10.1617/s11527-022-01988-8
    https://doi.org/10.1617/s11527-022-01988-8
    DOI

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