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活性粉末混凝土的高温爆裂及其内部温度场的试验研究
doi: 10.13204/j.gyjz2001411025
EXPERIMENT ON THE SPALLING AND TEMPERATURE FIELD DISTRIBUTION OF REACTIVE POWDER CONCRETE UNDER HIGH TEMPERATURE
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摘要: 利用自行设计的加温装置测试了高温条件下活性粉末混凝土(RPC)试件的爆裂行为和温度场分布特征。结果表明:采用加热速率为4.8℃/min,炉温为330℃时,RPC会发生爆裂。在RPC发生爆裂前,从试件角部到棱部、再到试件中心的位置,存在较明显的温度差异。通过分析RPC内部不同部位发生爆裂的临界温度与临界时间关系,建立了爆裂临界温度和时间、空间的计算模型。为进一步定量计算RPC内部温度应力,解释RPC高温爆裂机理提供了参考。
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关键词:
- 活性粉末混凝土( ＲPC) /
- 爆裂 /
- 温度场 /
- 高温
Abstract: The spalling behaviour and the temperature field distribution of RPC under high temperature were tested． The result showed that the spalling of RPC would occur when furnace temperate reached to 330 ℃ with the heating rate being 4. 8 ℃ /min． Before the explosion，the temperature differences were significant between the center and corner of specimens． The spalling critical temperature and time of RPC was analysed，and the calculation model of the spalling critical temperature and time as well as space was established． The results provided the scientific basis for the further quantificational calculation of the internal thermal stress in RPC，and the interpretation of spalling mechanism．-
Key words:
- reactive powder concrete( RPC) /
- spalling /
- temperature field /
- high temperature
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