This experimental investigation aims at evaluating the thermal properties of rice husk ash (RHA)—filled gypsum plaster composite for potential applications, as insulating materials. The thermal conductivities of comp...This experimental investigation aims at evaluating the thermal properties of rice husk ash (RHA)—filled gypsum plaster composite for potential applications, as insulating materials. The thermal conductivities of composites of gypsum plaster reinforced with RHA at 0%, 10%, 20%, 30%, and 40% volume fractions were determined experimentally using Lee’s disc method. The experimental results show that integrating RHA reduces the thermal conductivity of gypsum plaster and improves its insulation capacity. The results obtained from the experiments were compared with the Rule of Mixture Model, Maxwell Model, and Russell Model. It was observed that the thermal conductivities obtained from experiments and the theoretical models decreased with an increase in the volume fraction of RHA. The errors associated with the models with respect to experimental results are on the average of 28.7% for Mixture Rule, 31.6% for Russel Model, and 18.8% for the Maxwell Model. An agricultural waste like RHA can be beneficially used for the preparation of composites and, due to improved insulation capability, these composites can be used for applications such as insulation boards and sheathing, hardboard, ceilings of roofs, decorations, etc.展开更多
通过研究建筑石膏种类、轻骨料种类、纤维素醚种类的选择,纤维素醚的黏度和用量,普硅水泥用量及缓凝剂用量等对轻质抹灰石膏的涂布率、抗压强度、拉伸粘结强度等性能的影响,确定了高涂布率轻质高强抹灰石膏的配比组成为:石膏粉88%~90%,...通过研究建筑石膏种类、轻骨料种类、纤维素醚种类的选择,纤维素醚的黏度和用量,普硅水泥用量及缓凝剂用量等对轻质抹灰石膏的涂布率、抗压强度、拉伸粘结强度等性能的影响,确定了高涂布率轻质高强抹灰石膏的配比组成为:石膏粉88%~90%,普硅水泥2.0%~4.0%,轻骨料8.0%,掺黏度为50 000 m Pa·s的EH纤维素醚0.25%~0.35%,蛋白质类缓凝剂用量为0.015%~0.020%。制备的高涂布率轻质抹灰石膏施工顺滑,物理性能符合GB/T 28627—2023的技术要求。展开更多
文摘This experimental investigation aims at evaluating the thermal properties of rice husk ash (RHA)—filled gypsum plaster composite for potential applications, as insulating materials. The thermal conductivities of composites of gypsum plaster reinforced with RHA at 0%, 10%, 20%, 30%, and 40% volume fractions were determined experimentally using Lee’s disc method. The experimental results show that integrating RHA reduces the thermal conductivity of gypsum plaster and improves its insulation capacity. The results obtained from the experiments were compared with the Rule of Mixture Model, Maxwell Model, and Russell Model. It was observed that the thermal conductivities obtained from experiments and the theoretical models decreased with an increase in the volume fraction of RHA. The errors associated with the models with respect to experimental results are on the average of 28.7% for Mixture Rule, 31.6% for Russel Model, and 18.8% for the Maxwell Model. An agricultural waste like RHA can be beneficially used for the preparation of composites and, due to improved insulation capability, these composites can be used for applications such as insulation boards and sheathing, hardboard, ceilings of roofs, decorations, etc.
文摘通过研究建筑石膏种类、轻骨料种类、纤维素醚种类的选择,纤维素醚的黏度和用量,普硅水泥用量及缓凝剂用量等对轻质抹灰石膏的涂布率、抗压强度、拉伸粘结强度等性能的影响,确定了高涂布率轻质高强抹灰石膏的配比组成为:石膏粉88%~90%,普硅水泥2.0%~4.0%,轻骨料8.0%,掺黏度为50 000 m Pa·s的EH纤维素醚0.25%~0.35%,蛋白质类缓凝剂用量为0.015%~0.020%。制备的高涂布率轻质抹灰石膏施工顺滑,物理性能符合GB/T 28627—2023的技术要求。
