| 用相变材料降低大体积混凝土内部温升的研究 |
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| 引用本文： | 高桂波,钱春香,庄园,朱晨峰.用相变材料降低大体积混凝土内部温升的研究[J].水力发电学报,2010,29(1). |
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| 作者姓名： | 高桂波 钱春香 庄园 朱晨峰 |
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| 作者单位： | 东南大学材料科学与工程学院,南京,211189 |
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| 基金项目： | 国家自然科学基金雅砻江水电开发联合基金重点资助项目(50539040); 东南大学优秀博士学位论文基金资助(YBJJ0725) |
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| 摘 要： | 为了探讨预填埋相变材料(PCM)对降低混凝土内部温升的效果和影响趋势,采用半绝热测温装置研究了在不同PCM填埋量下,水泥净浆、砂浆、混凝土内部温度的变化;根据PCM在不同温度阶段的吸热特点,推导了混凝土最高绝热温升、温升降低幅度与PCM填埋量和相变性能的关系表达式.研究结果表明:PCM的填埋量越大,混凝土内部温峰降低幅度越大,温峰出现时间越迟.单位混凝土中水泥用量越高,相应填埋比例的PCM对内部温升的降低幅度越大;混凝土中水泥用量为100～400kg/m~3,PCM预填埋量为水泥重量的10%时.混凝土绝热温升降低0.87～6.17℃,降低幅度为5.0%～8.9%.
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| 关 键 词： | 水工材料 温度控制 实验研究 相变材料 大体积混凝土 预填埋 |
Research on use of phase change materials for reduction of internal temperature rise of mass concrete |
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| GAO Guibo
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QIAN Chunxiang
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ZHUANG Yuan
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ZHU Chenfeng.Research on use of phase change materials for reduction of internal temperature rise of mass concrete[J].Journal of Hydroelectric Engineering,2010,29(1). |
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| Authors: | GAO Guibo QIAN Chunxiang ZHUANG Yuan ZHU Chenfeng |
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| Affiliation: | GAO Guibo,QIAN Chunxiang,ZHUANG Yuan,ZHU Chenfeng (School of Material Science , Engineering,Southeast University,Nanjing 211189) |
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| Abstract: | In order to evaluate the influence of pre-embedded phase change materials(PCM)on internal temperature rise of mass concrete,a semi-adiabatic device is adopted to measure the temperature of cement paste,mortar and concrete in different content of PCM at different hydration age.According to the relationship between cement hydration heat,latent heat and specific heat of PCM in different phase,a calculation formula of internal maximum adiabatic temperature rise of concrete with pre-embedded PCM bas been derived... |
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| Keywords: | hydraulic material temperature control experimental research phase change materials mass concrete pre-embedment |
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