多孔烧结陶片吸水特性实验方法

发布时间：2018-05-10 05:48

本文选题：多孔材料 + 毛细吸水　；参考：《土木建筑与环境工程》2017年01期

【摘要】：建筑被动蒸发降温效益以多孔材料吸水特性为基础。以广泛应用的多孔烧结陶片为例,相关参数测试方法标准并不一致。笔者参考国际标准采用"单面浸泡法"测试了3种多孔陶片的毛细吸水系数及毛细饱和含水率,实验结果表明,在第1吸水阶段,材料孔隙率与毛细吸水系数及毛细饱和含水率呈现显著正相关关系。参考中国标准,采用"整体浸泡法"和"真空饱和法"测试了上述3种材料在水中浸泡24h后的含水率,并与"单面浸泡法"测试结果进行了对比研究,结果显示,后者实验结果分别比前两者低3.25%和21.58%。研究表明,第1阶段吸水速率高的材料具有更高毛细饱和含水率,此种陶片更适宜蒸发降温应用。测试方法上单面浸泡法优于整体浸泡法。采用重复性误差衡量实验精确度,分析结果表明上述实验的重复性误差均低于2.40%。
[Abstract]:The efficiency of passive evaporation cooling in buildings is based on the water absorption characteristics of porous materials. With the widely used porous sintered pottery as an example, the standard of the related parameter testing method is not consistent. The author uses the international standard to test the capillary water absorption coefficient and capillary saturated water content of the 3 kinds of porous pottery with "single surface soaking method". The experimental results show that first In the water absorption stage, the material porosity has a significant positive correlation with the capillary water absorption coefficient and the capillary saturated water content. With reference to the Chinese standard, the water content of the above 3 materials after 24h immersion in water is tested by the "holistic immersion method" and "vacuum saturation method", and the results are compared with the "single surface soaking method" test results. The results show that the latter is the latter. The experimental results are 3.25% lower than those of the previous two and 21.58%. studies show that the material with high water absorption rate in the first stage has higher capillary saturation moisture content, and this kind of pottery is more suitable for the application of evaporation cooling. The method of single surface immersion is superior to the whole immersion method. The repeatability error is lower than 2.40%.

【作者单位】：华南理工大学建筑学院;
【基金】：国家自然科学基金(51590912、51308223、51678243、51308222) 广东省自然科学基金(2016A030313506) 亚热带建筑科学国家重点实验室自主课题(2015ZC14)~~
【分类号】：TQ174.1

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