摘要
为研究不同形式相变墙体的工作性能,按0、5%、10%、20%将相变微胶囊等体积替代普通混凝土中的细骨料,使用微胶囊法和夹层法制备尺寸为500 mm×300 mm×100 mm的五种相变混凝土墙体,通过电加热板模拟太阳辐射强度分析其热工性能,采用压力试验机测试其抗压强度。试验结果表明:同一相变材料掺量下,O-Ⅰ型墙温升速率和温度峰值均较大,Ⅲ型墙体导热系数大于O-Ⅱ型墙,O-Ⅱ-O型墙升温速率明显大于O-Ⅱ型墙,O-Ⅱ型墙热工性能表现最为优异,且28 d龄期时能满足设计强度等级的要求。同一龄期下,混凝土抗压强度从大到小依次为O型、O-Ⅱ型、Ⅲ型、O-Ⅱ-O型、O-Ⅰ型。
In order to analyze the working performance of different forms of phase change wall,phase change microcapsules were used to replace the fine aggregate in ordinary concrete by 0,5%,10%and 20%.Five kinds of phase change concrete walls with section size of 500 mm×300 mm×100 mm were prepared by microcapsule method and sandwich method.The thermal performance was analyzed by simulating solar radiation intensity with electric heating plate,and the compressive strength was tested by pressure testing machine.The test results show that under the same PCM content,the temperature rise rate and temperature peak of O-Ⅰwall are larger,the thermal conductivity of typeⅢwall is larger than that of O-Ⅱ,and the temperature rise rate of O-Ⅱ-O wall is significantly larger than that of O-Ⅱ.The thermal performance of O-Ⅱwall is the best,and it can meet the requirements of design strength grade at 28 days.At the same age,the compressive strength of concrete from large to small is O,O-Ⅱ,Ⅲ,O-Ⅱ-O,O-Ⅰ.
作者
胡孝彭
常允艳
郭建军
HU Xiaopeng;CHANG Yunyan;GUO Jianjun(Chongqing Water Resources and Electric Engineering College,Chongqing 402160,China;Hehai College,Chongqing Jiaotong University,Chongqing 44074,China)
出处
《水利与建筑工程学报》
2023年第6期51-55,共5页
Journal of Water Resources and Architectural Engineering
基金
重庆水电职院科研项目(K202216)
重庆市教育科学“十四五”规划课题(K22YC317058)
中国水利教育协会研究课题(2023SLZJ36)。
关键词
相变混凝土
相变材料(PCM)
墙体
phase change concrete
phase change material
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