共查询到19条相似文献,搜索用时 109 毫秒
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随着建筑能耗的不断增加以及能源危机的日益加剧,建筑节能变得尤为迫切。外墙是围护结构节能的重点。泡沫混凝土因良好的保温隔热性能被广泛应用于建筑工程中,但其在建筑外墙的应用还处于探索阶段。本文介绍了新型泡沫混凝土外墙的构造及性能特点,并通过实验对比分析了外保温墙体、实心砖墙体和泡沫混凝土墙体的保温隔热性能。实验结果显示,泡沫混凝土外墙的保温隔热性能远优于其他两种墙体,在空调状态下,其内表面的热流值仅为外保温墙体的30.4%,具有显著的节能效果。不仅如此,泡沫混凝土外墙更为轻质,其质量仅为外保温墙体的49.1%。 相似文献
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建筑围护结构节能技术是世界各国建筑节能研究的重要方向之一,发展高性能建筑围护结构保温材料、制品及其系统是实现建筑节能的矣键。泡沫混凝土正是体现了节能、保温、隔热、轻质、耐火等性能的一种多功能材料.在建筑节能领域将发挥着越来越重要的作用。将泡沫混凝土和常用和EPS板、XPS板、Pu硬泡、加气混凝土及岩棉等产品的性能进行比较,指出了泡沫混凝土在建筑节能中的应用优势。 相似文献
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《建筑节能》2021,(8)
寒区建筑外围护结构附加保温材料能够有效改善室内热环境,降低建筑能耗。EPS、XPS等传统保温板虽然在一定程度上能满足建筑的保温需求,但易开裂脱落且阻燃性差,存在安全隐患。超轻泡沫混凝土具有良好的热工性能和阻燃性能,是理想的无机保温材料,应用前景明朗。建立寒区某简化农宅建筑能耗分析模型,通过EnergyPlus软件研究对比安装超轻泡沫混凝土保温板与EPS、XPS等传统保温材料的建筑全年能耗,并分析外墙保温、屋顶保温形式差异,给出安装不同保温材料建筑全生命周期内总费用。研究结果表明,外墙保温对建筑能耗影响较大;建筑保温材料厚度相同时,超轻泡沫混凝土保温板保温性能优于XPS保温板、EPS保温板;超轻泡沫混凝土保温板厚度采用120 mm时全生命周期总费用最低。 相似文献
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泡沫玻璃保温板既达到A级防火要求,又能达到设计保温效果,通过采取粘结砂浆将泡沫玻璃保温板与屋面基层粘结,同时针对屋面保温层加入一些构造做法,找坡与找平采用轻集料混凝土同时完成,解决了建筑保温隔热工程中保温材料吸水率高、耐久性差的两大难题,又保证了屋面的防火性能和保温效果。 相似文献
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目前装配式建筑大力发展,填充墙在框架、框架-剪力墙和框筒结构中充当分割空间的功能,其必须具有质轻、力学性能优良、保温隔热和隔声降噪的功能。泡沫混凝土具有较多的孔隙,其能够有效吸收噪声,同时复配钢纤维,能够极大提高其力学性能。研究了钢纤维掺量和长度对钢纤维-泡沫混凝土力学性能和降噪保温隔热性能的影响。结果表明:当钢纤维掺量为4%,长度为40 mm时,钢纤维-泡沫混凝土具有优良的力学性能;在夏季代表温度40℃下具有良好的隔热性能,内外墙温差达到5.6℃,同时具有良好的保温性能和隔声性能。 相似文献
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泡沫混凝土是一种高品质的新型轻薄保温材料,它本身的性能和孔结构与加气混凝土类似,不仅具有高效环保、性能优良和价格低廉等特点,还具有保温和隔热的特殊功能,对于建筑的成本节约和高效环保均有着重要作用。文章主要针对泡沫混凝土的高效环保、性能优良和价格低廉等特点进行研究与学习,进而分析泡沫混凝土的优势与不足。 相似文献
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苏联莫斯科古比雪夫建筑制品研究院展出一种泡沫聚苯乙烯混凝土块,可在民用与工业建筑屋面与天花板隔热的情况下,供多层建筑结构绝热装置之用。该材料系轻质混凝土,以能发泡的泡沫聚 相似文献
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Cristina Becchio Stefano Paolo Corgnati Simonetta Pagliolico 《Energy and Buildings》2009,41(11):1127-1134
This research focuses on the possibility of constituting a more sustainable lightweight concrete, Mineralized Wood Concrete (MWC), substituting natural aggregates with wastes from woodworking activities. Exploiting this type of aggregates, a triple purpose has been achieved: preservation of natural raw materials, reuse of wastes and energy saving. Furthermore, the use of wood aggregates is a way to try to develop a sustainable concrete characterized by high thermal inertia, high thermal resistance and low weight.In this paper, effects of the addition of wood aggregates on mechanical and thermal properties of concrete are studied. Mechanical performances have been investigated with compressive strength tests, while a one-dimensional heat flow model has been used to predict the thermal conductivity of MWC.The use of MWC can be associated with the idea of a different typology of relatively heavy building envelope: this union could competitively answer to the demand of well-insulated building envelope and concurrently characterized by high thermal mass. From this union, a series of other values can be derived: low weight, environmentally friendly, easily industrialized and easy on-site casting. Consequently, applications of wood concrete in building constructions may be an interesting solution in order to improve sustainability and building energy efficiency. 相似文献
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混凝土空心砌块墙体热工性能的改善是保证良好的室内热环境、节约建筑能耗的重要措施.本文在分析混凝土空心砌块热工性能的基础上,研究在空心砌块内填昊角材料芯块对复合砌块热工性能的改善情况,并提出适合工程应用的方法,为复合砌块的热工性能评估提供理论参考. 相似文献
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Energy storage concrete – a concrete with integrated latent heat storage material. In times of solar architecture and increased utilisation of renew‐able energy, building components with high thermal heat storage capability are becoming increasingly important. One of the areas future research in building physics and building services will focus on is the development of energy storage units. A particularly interesting research area is latent heat storage. This essay describes the development of a concrete with integrated latent heat storage material (phase change material, PCM) as part of a thesis. This innovative concrete offers significantly improved thermal characteristics. For example, it was possible to more than double the heat capacity within a temperature range of 10 Kelvin around the melting point of the PCM. The PCM has a melting point between approx. 22 °C and 35 °C, depending on application. A highly versatile material such concrete offers a wide range of application options. In principle, it is possible to use latent heat storage concrete to supplement heating systems, to extend the scope of passive solar systems, or to protect against overheating in summer. 相似文献
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根据国家对建筑能耗节能50%和节材的要求,目前在夏热冬冷地区对建筑围护结构普遍采用空心砌块以满足对热阻的要求。应用模拟软件FLUENT对内插保温层混凝土空心砌块的热工性能进行数值模拟,并分别从热传导、热对流和热辐射三个方面对模拟结果进行了详细的分析,找出存在的不足,从而为改善砌块的热工性能提供了较为有效的途径。 相似文献
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The objective of this study is to determine the potential energy savings and thermal comfort benefits of exposing concrete in the ceiling to the indoor air as an alternative to suspended ceiling. The performances were assessed through monitoring of room air and surface temperatures in an office building in operation, and simulation of different scenarios with a calibrated building simulation model. In this study, it is shown that ESP-r is capable of simulating an advanced controlled office building in operation with good agreement with the measurements. The results presented in this paper indicate that exposed concrete in the ceiling both reduces the number of hours with excessive temperatures considerably and create a better and more stable thermal environment during the working day. Also, exposed concrete increases the achievements of utilizing night free cooling significantly. However, by removing the suspended ceiling, only minor annual heating energy savings are achieved. 相似文献