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首页> 外文期刊>Arabian Journal for Science and Engineering >Development of Thermal Insulating Lightweight Foamed Concrete Reinforced with Polypropylene Fibres
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Development of Thermal Insulating Lightweight Foamed Concrete Reinforced with Polypropylene Fibres

机译：聚丙烯纤维增强轻质隔热发泡混凝土的开发

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摘要

The construction of concentrated infrastructures due to rapid urbanization has given rise to urban heat island (UHI) phenomenonwhich causes temperature of urban areas to significantly increase compared to its adjacent cooler rural areas. Theabsorption of heat in the form of solar radiation by infrastructures is the main contributor to UHI, which results in the rise inthe ambient temperature at night. This has forced the construction industry to focus on thermal insulating building materialssuch as foamed concrete. Air voids in the matrix of foamed concrete allow it to reduce the thermal conductivity and drydensity; however, due to its reduced density, foamed concrete is prone to microcracking which results in loss of strength.To counteract the development and propagation of microcracks, polypropylene (PP) fibres are used to reinforce the foamedconcrete. Therefore, in this study, foamed concrete of density 1600 kg/m~3 was reinforced using PP fibres in three percentages,0.20%, 0.25% and 0.30%. Thermal performance, in terms of thermal conductivity and surface temperature, was conducted aswell as the compressive and tensile strength was determined. It was observed that the PP fibres not only enhanced the strengthbut also significantly lowered the thermal conductivity and absorbed less heat.
机译：由于快速的城市化而导致的集中基础设施的建设引起了城市热岛现象（UHI），与邻近的较凉爽的农村地区相比，城市热岛现象使城市的温度显着上升。基础设施以太阳辐射的形式吸收热量是造成UHI的主要因素，这导致夜间环境温度升高。这迫使建筑业专注于隔热建筑材料，例如泡沫混凝土。泡沫混凝土基体中的空隙会降低导热性和干密度。然而，由于泡沫混凝土的密度降低，因此容易发生微裂纹，从而导致强度损失。为了抵消微裂纹的发展和蔓延，聚丙烯（PP）纤维用于增强泡沫混凝土。因此，在本研究中，使用0.2％，0.25％和0.30％的三个百分比的PP纤维增强了密度为1600 kg / m〜3的泡沫混凝土。根据导热率和表面温度进行热性能，并确定抗压强度和拉伸强度。观察到PP纤维不仅增强了强度，而且显着降低了热导率并吸收了更少的热量。

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