共查询到20条相似文献,搜索用时 31 毫秒
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粉刷石膏砂浆具有质量轻、微膨胀、导热系数小、与建筑基层连接较紧密等优势。因而以石膏作为胶凝材料、膨胀珍珠岩作为骨料制备轻质粉刷石膏砂浆,采用了正交试验法,研究了不同掺量的建筑石膏、膨胀珍珠岩、纤维素醚及重钙对粉刷石膏砂浆的抗压强度、粘结强度、密度等性能的影响规律,最终确定了粉刷石膏砂浆的配合比。 相似文献
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以石蜡为相变材料,膨胀珍珠岩做支撑基体,制备了膨胀珍珠岩-石蜡复合相变材料,采用苯丙乳液对复合相变材料封装,利用封装后的复合相变材料替代部分细骨料制备了相变储能砂浆,并对其力学性能进行了试验研究。结果表明:苯丙乳液对复合相变材料有很好的封装作用;随着复合相变材料替代率的增大,相变储能砂浆的力学性能下降;当复合相变材料替代率为70%时,相变储能砂浆的抗压强度为12.7 MPa,满足规范中对建筑围护结构砂浆的要求。研究成果可为相变材料在建筑中的应用提供参考。 相似文献
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郑允宅 《混凝土与水泥制品》2022,(3):76-79,84
以轻钢龙骨和钢板网为骨架,石膏基聚苯颗粒砂浆为填充材料制备两种构造形式的新型复合墙板,并对其抗弯承栽性能、隔声性能和耐火性能进行了研究.结果 表明:石膏基聚苯颗粒砂浆的干密度、导热系数和抗压强度均随着聚苯颗粒掺量的增加而降低,且聚苯颗粒的最佳掺量为0.8%;两种构造形式复合墙板的破坏荷栽与自重荷载的比值达到7.0以上;... 相似文献
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利用脱硫石膏开展了地面自流平材料试验研究,结果表明,以α半水石膏为基料,掺加石英砂以及减水剂、缓凝剂、消泡剂等外加剂可制备石膏基自流平砂浆,且该自流平砂浆流动度、抗折强度、抗压强度和拉伸黏结强度等主要技术性能指标均达到JC/T 1023—2007《石膏基自流平砂浆》标准要求. 相似文献
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Different methods have been investigated for achieving heat insulation in the buildings. Manufacturing of high heat conductivity resistant construction materials is an important part of these research efforts. Perlite is an extremely useful material for heat insulation and 70% of the world reserves are located in Turkey. Nearly 65% of the perlite produced today is consumed by the construction industry. Its thermal, lightness, and acoustic insulation properties make perlite an excellent material to be used as lightweight aggregate in brick manufacturing. High heat resistant brick can be produced by adding perlite into the clay in conventional brick manufacturing. In this investigation perlite of Eski?ehir region and clay were collated and fired to form high heat conductivity resistant material. Binding materials such as cement, gypsum, lime, bitumen and clay were used for manufacturing perlite brick. Bricks in standard sizes manufactured at different perlite–clay ratios and unit weight, compressive strength, volume reduction and heat conductivity values were obtained. Then the mixture with the best combination of the properties was determined and cost optimization was described. Results were examined according to combination properties, and specialties of perlite bricks were determined at various weights. As a result, the best mixture was determined as the one containing 30% perlite. 相似文献
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Ozkan Sengul Senem Azizi Filiz Karaosmanoglu Mehmet Ali Tasdemir 《Energy and Buildings》2011,43(2-3):671-676
The main objective of this study is to provide more data on the effects of expanded perlite on the mechanical properties and thermal conductivity of lightweight concrete. In the experimental program, mixtures were prepared by partially replacing natural aggregate by expanded perlite and as a result, unit weights of lightweight concretes in fresh state varied between 700 and 2000 kg/m3. Water to cement ratio was kept constant in all mixtures. Compressive strength, modulus of elasticity, water absorption and capillarity coefficient of the mixtures were determined. Thermal conductivity of the specimens was also obtained. Test results show that the compressive strength and modulus of elasticity decreases with increasing in perlite content. Water absorption and sorptivity coefficient, however, increase with the higher perlite contents. The test results indicate that the thermal conductivity is substantially improved with the use of perlite and a strong relationship between thermal conductivity and unit weight is obtained. 相似文献
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《Energy and Buildings》2005,37(10):1084-1091
Shape-stabilized phase change material (PCM) is a kind of novel PCM. It has the following salient features: large apparent specific heat for phase change temperature region, suitable thermal conductivity, no container. In the present paper, a kind of shape-stabilized PCM floor is put forward which can absorb the solar radiation energy in the daytime and release the heat at night in winter. Therefore, in winter the indoor climate can be improved and the energy consumption for space heating may be greatly reduced. A model of analyzing the thermal performance of this shape-stabilized PCM floor is developed. By using the modeling, the influence of various factors (thickness of PCM layer, melting temperature, heat of fusion, thermal conductivity of PCM, etc.) on the room thermal performance was analyzed. The model was verified by the experimental results. The model and the analysis are helpful for the application of shape-stabilized PCM floor in solar buildings. 相似文献
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《Energy and Buildings》2005,37(3):215-220
This paper put forward a new kind of under-floor electric heating system with shape-stabilized phase change material (PCM) plates. Different from conventional PCM, shape-stabilized PCM can keep the shape unchanged during phase change process. Therefore, the PCM leakage danger can be avoided. This system can charge heat by using cheap nighttime electricity and discharge the heat stored at daytime. In the present work, the thermal physical properties of shape-stabilized PCM developed by us were measured. A prototype room with this system was set up in Beijing to testify its thermal performance and feasibility of this heating mode. The results show that temperature of the PCM plates upper surface can be kept near the phase transition temperature in whole day and a lot of off-peak period electricity can be used for space heating in stead of using peak period electricity, which obviously lowers the electricity tariff. 相似文献
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通过正交试验,研究了膨胀珍珠岩与玻化微珠复合骨料、粉煤灰、聚丙烯纤维和引气剂对保温砂浆的物理、力学性能以及保温性能的影响。用膨胀珍珠岩与玻化微珠按适宜比例配合组成复合骨料来制备保温砂浆,可有效改善骨料颗粒级配,降低砂浆的干密度,提高强度。掺加粉煤灰,不仅可降低砂浆的干密度,而且可有效降低成本。在砂浆中掺入聚丙烯纤维可有效提高砂浆的抗折强度。引气剂的掺入可以进一步降低砂浆的干密度,改善其保温性能,同时也可提高砂浆的流动性。 相似文献
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《Energy and Buildings》2006,38(4):377-380
A novel composite phase change material (PCM) was prepared by blending an organic PCM with an organic-modified montmorillonite. The thermal characteristics of the composite PCM were close to those of the pure PCM, and 1500 times heating–cooling cycles test showed that the composite PCM had good performance stability. Compared with the pure PCM, the composite PCM exhibited higher heat transfer rate owing to the combination with montmorillonite. The composite PCM had a good compatibility with gypsum powders, and the composite gypsum boards prepared had a function of cutting down energy consumption by decreasing the frequency of internal air temperature swings. 相似文献