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首页> 美国卫生研究院文献>Materials >Effect of Iron (III) Oxide Powder on Thermal Conductivity and Diffusivity of Lime Mortar
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Effect of Iron (III) Oxide Powder on Thermal Conductivity and Diffusivity of Lime Mortar

机译：铁（III）氧化物粉对石灰砂浆导热率和扩散性的影响

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摘要

One of the challenges in construction is the improvement of energy efficiency of buildings. Development of construction materials of low thermal conductivity is a straightforward way to improve heat isolating capability of an enclosure. Lime mortar has a number of advantageous and peculiar properties and was widely used until the “irruption” of Portland cement. Currently, lime mortar is still used in restoration of traditional buildings or, according to the urban regulations, in catalogued constructions. The goal of the present study is the improvement of the heat isolating capability of lime mortars. The strategy of this work is the addition of iron (III) oxide powder, which is one of the possible components forming the cements, to a base lime mortar. The reason to choose Fe2O3 was two-fold. The first reason is low thermal conductivity of Fe2O3 compared to lime mortar. The second reason is that the low solubility and small size of iron (III) oxide particles have an effect on the thermal conductivity across the lime particles. The effect of iron (III) oxide powder on the thermal conductivity has been experimentally determined by the hot-box method. It has been found that the insulating capacity and thermal inertia of lime mortar is improved significantly by the addition of Fe2O3 powder, increasing the energy saving of the enclosure.
机译：建设中的一个挑战是提高建筑能源效率。低导热系数的建筑材料的开发是提高外壳的隔热能力的直接途径。雷姆砂浆具有许多有利且特殊的特性，并且广泛使用，直到波特兰水泥的“灌输”。目前，石灰砂浆仍然用于传统建筑物的恢复，或根据城市法规，在编目的建筑中。本研究的目的是提高石灰砂浆的热隔离能力。这项工作的策略是添加铁（III）氧化物粉末，其是形成水泥的可能部件之一，到基础石灰砂浆。选择Fe2O3的原因是两倍。第一个原因是与石灰砂浆相比Fe2O3的低导热率。第二种原因是低溶解度和小尺寸的铁（III）氧化物颗粒对石灰颗粒的导热率具有效果。铁（III）氧化物粉末对导热率的影响已经通过热箱方法实验确定。已经发现，通过加入Fe2O3粉末，石灰砂浆的绝缘容量和热惯性显着提高，增加了外壳的节能。

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