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Curing and Load Performance of Adhesives Anchor for Building Applications

机译:粘合剂锚固锚的固化和负载性能

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In the last years it became more and more common to install adhesive anchors in concrete also in cold weather conditions. It is well known that curing behavior and final properties of adhesives used for anchoring are strongly influenced by the curing temperature. So, the curing rate becomes low and the glass transition temperature of the cured adhesive is reduced when the anchors are installed at low temperatures. This may result in insufficient load and creep resistance compared to anchors installed at ambient temperatures. Therefore, this paper is related to a better understanding of curing and creep behaviour of adhesive anchors with special focus on curing and load performance after installation at low temperatures. For this purpose, simulations and sustained load tests are combined. The conversion - time curves, the relation between glass transition temperature (T_G) and chemical conversion (p) were simulated for different (non-isothermal) temperature programs. For the simulation we used generally accepted models for the description of thermoset curing (see [1-5] and references therein). The input data for simulation are-estimated using dynamic scanning calorimetry (DSC) (see for example refs. [4,5]) and dynamic-mechanical analysis (DMTA).
机译:在过去几年中,在寒冷的天气条件下也可以在混凝土中安装粘合剂锚点越来越普遍。众所周知,用于锚定的固化行为和最终性质受固化温度的强烈影响。因此,固化率变低,当锚固件安装在低温下时,固化粘合剂的玻璃化转变温度降低。与安装在环境温度下的锚固件相比,这可能导致负载和蠕变电阻不足。因此,本文与粘合剂锚固件的固化和蠕变行为更好地理解,在低温下安装后具有特别关注固化和负载性能的粘合锚固件。为此目的,组合模拟和持续负载测试。对不同(非等温)温度节目的模拟玻璃化转变温度(T_G)和化学转化(P)之间的关系的转换时间曲线。对于模拟,我们通常使用的型号用于热固性固化的描述(参见[1-5]和其中引用)。使用动态扫描量热法(DSC)估计模拟的输入数据(参见例如refs。[4,5])和动态机械分析(DMTA)。

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