多孔烧结陶片在盐溶液中的吸水特性

发布时间：2018-06-24 04:29

  本文选题：多孔陶片 + 吸水系数　； 参考：《土木建筑与环境工程》2017年06期

【摘要】：外墙多孔饰面层在含盐环境下的吸水特性变化,将影响利用被动蒸发技术之低能耗建筑的效能。为探寻盐浓度对陶片吸水特性影响的规律,以一种常用陶片分别在纯水、3.5%及26.3%质量分数NaCl溶液中,采用部分浸泡法进行吸水实验。结果显示:毛细吸水系数在3.5%溶液中比纯水高17.57%,在26.3%溶液中比纯水低12.17%。陶片吸收纯水质量随溶液浓度提高呈线性下降趋势。达到毛细饱和时,陶片含水量在3.5%溶液中比纯水低2.50%,在26.3%溶液中比纯水低16.18%;继续连续吸水24h后,陶片含水量在3.5%溶液中比纯水低3.18%,在26.3%溶液中比纯水低20.51%。综合而言,盐分将削弱陶片吸收纯水的能力,削弱水平随盐分浓度提高而增强,陶片在滨海含盐环境中吸水情况将明显区别于内陆地区。
[Abstract]:The variation of water absorption characteristics of external wall porous facing layer in salt environment will affect the efficiency of low energy consumption buildings using passive evaporation technology. In order to find out the effect of salt concentration on the water absorption characteristics of ceramic pieces, the water absorption experiments were carried out in 3.5% and 26.3% NaCl solution of pure water respectively with a common ceramic piece. The results showed that the capillary absorption coefficient in 3.5% solution was 17.57 higher than that in pure water, and in 26.3% solution it was 12.1717 lower than that in pure water. The quality of pure water absorbed by ceramic chips decreased linearly with the increase of solution concentration. When capillary saturation is reached, the water content of ceramic pieces is 2.50 lower in 3.5% solution than in pure water, 16.18 lower in 26.3% solution than pure water, 3.18% lower in 3.5% solution and 20.51% lower than pure water in 26.3% solution after 24 hours of continuous water absorption. On the whole, the salt content will weaken the ability of absorbing pure water, and the weakening level will increase with the increase of salt concentration, and the absorption of water in the salt-bearing environment of the coastal area will be obviously different from that in the inland area.
【作者单位】： 华南理工大学建筑学院亚热带建筑科学国家重点实验室;
【基金】：国家自然科学基金(51590912)~~
【分类号】：TU111.4
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本文编号：2060019