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首页> 外文会议>World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium >Non-Destructive Assessment of Residual Strength of Thermally Damaged Concrete Made with Different Aggregate Types
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Non-Destructive Assessment of Residual Strength of Thermally Damaged Concrete Made with Different Aggregate Types

机译：用不同骨料类型制造的热损伤混凝土残留强度的无损评估

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摘要

The paper presents the results obtained for four concretes made with four different aggregate types: basalt, granite, dolomite and riverbed gravel. In this study, the cement paste and mortar compositions and their volumes remained the same for all the four concretes that allow clear comparisons and conclusions of aggregate type effect. Moreover, the aggregate particle size distribution is chosen to be quasi identical for all concretes so that this factor does not affect the concrete behaviour. The residual material properties (after heating and cooling down) are determined with the use of destructive and non-destructive testing methods for each concrete type being not thermally damaged and after thermal exposure at temperature of 200 °C. 400 °C, 600 °C, 800 °C and 1000 °C. Residual mechanical properties are compared with diagnostic parameters obtained with NDT methods. The aim of this study is to provide and compare the regression curves between selected non-destructive diagnostic parameters and the residual values of mechanical properties. The NDT methods used in this experiment are: surface hardness and Ultrasonic Pulse Velocity.
机译：本文提出了用四种不同聚集体类型制成的四种混凝土的结果：玄武岩，花岗岩，白云石和河床砾石。在本研究中，所有四种混凝土都留下了水泥糊和砂浆组合物及其体积，允许明确比较和总型效应的结论。此外，选择聚集粒度分布为所有混凝土的准相同，使得该因子不影响具体行为。使用对每个混凝土类型的破坏性和非破坏性测试方法的使用，测定残留物质（加热和冷却后），对于每个混凝土型在200℃温度下热损坏和热暴露后的热曝光后，测定。 400°C，600°C，800°C和1000°C。将残留的机械性能与用NDT方法获得的诊断参数进行比较。本研究的目的是提供并比较所选择的非破坏性诊断参数与机械性能的残余值之间的回归曲线。本实验中使用的NDT方法是：表面硬度和超声波脉冲速度。

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