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Temperature variation rates in concrete at low installation temperatures of bonded fasteners
Author(s) -
Wall Friedrich,
Neuerburg Ralf,
Bourgund Ulrich
Publication year - 2019
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.978
Subject(s) - fastener , context (archaeology) , adhesive , service life , materials science , environmental science , structural engineering , composite material , engineering , geology , paleontology , layer (electronics)
Post‐installed bonded fasteners, also known as adhesive anchors, are used for the fastening of structural as well as nonstructural elements in a large variety of applications in concrete structures. The performance of these anchors is affected by the temperature conditions during the installation as well as over the design service life of the fastener. In this contribution, the temperature rates in the concrete, as relevant in the context of the installation of bonded fasteners at low installation temperatures, during winter months are investigated. Temperature sensors were installed in the concrete element at different depths. The concrete elements were stored in outdoor conditions for the period of this investigation. In addition, the temperature of the surrounding air as well as the solar radiation was measured. To investigate the influence of the color of the concrete, concrete elements with dark color as well as light color were used. The investigation shows that the temperature in the concrete at depths related to bonded fasteners may increase during the winter months at a rate of several degree Kelvin per hour. These results provide important information for the assessment of bonded fasteners installed at low installation temperatures.