Development of Expanded Perlite Board for Thermal Insulation

IF 0.6 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Chiang Mai Journal of Science Pub Date : 2022-11-30 DOI:10.12982/cmjs.2022.098

N. Keawprak, P. Arkom, Pracha Lao-auyporn, Nikorn Kaewpreak, P. Wannasut, A. Watcharapasorn

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Abstract

In this study, the perlite-based insulating material is developed to meet ASTM C610 standards in a form of the board. Expanded perlite powders with a tapped density of 53 and 150 kg/m³ were used in this study. Sodium silicate used as a proper binder at various concentrations was mixed with perlite powders. The homogeneous moist mixture was formed by uniaxial pressing at different compaction ratios. Specimens were dried at low temperatures (250-400°C). Measurements of physical properties e.g., fl exural strength, bulk density and thermal conductivity, were conducted. Perlite foam was set after drying, leading to an increase in its moisture resistance and strength. Compression molding also affected the density and strength of the products. Heat treatment after forming was carried out in order to dehydrate water molecules and bond particles together. The specimens were tested in accordance with ASTM C610 as a result of optimum conditions from perlite powder with a tapped density of 53 kg/m3. Perlite foam board had been successfully fabricated with a bulk density of 205 kg/m3, fl exural strength of 434 kPa, compressive strength of 764 kPa and room temperature thermal conductivity of 0.056 W/m.K.

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保温用膨胀珍珠岩板的研制

在本研究中，开发了珍珠岩基绝缘材料，以满足ASTM C610标准的板的形式。本研究使用了密度为53和150 kg/m³的膨胀珍珠岩粉末。以不同浓度的硅酸钠作为粘结剂与珍珠岩粉末混合。通过不同压实比的单轴压实，形成均匀的湿混合料。低温(250-400°C)干燥。测量了材料的物理性能，如抗折强度、体积密度和导热系数。珍珠岩泡沫在干燥后凝固，导致其抗湿性和强度增加。压缩成型也影响了产品的密度和强度。成型后进行热处理，使水分子脱水，使颗粒粘结在一起。根据ASTM C610的最佳条件，从珍珠岩粉末中提取密度为53 kg/m3的样品进行了测试。成功制备的珍珠岩泡沫板体积密度为205 kg/m3，抗折强度为434 kPa，抗压强度为764 kPa，室温导热系数为0.056 W/m.K。

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来源期刊

Chiang Mai Journal of Science MULTIDISCIPLINARY SCIENCES-

CiteScore

1.00

自引率

25.00%

发文量

103

审稿时长

3 months

期刊介绍： The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.