Restoration of historical buildings should be carried out without giving damage to the existing historical building, and material selections should be determined in accordance with the historical building structure. In addition to the selection of materials compatible with the historical structure, the selection of materials that can improve the interior acoustic quality of the space is one of the important parameters. In this research, increasing the sound absorption coefficient in the plaster layer was investigated to enhance the acoustic quality of historical places. Accordingly, plaster layers prepared with a natural hydraulic lime binder, which are frequently used in restorations, were examined in this research. It was aimed to increase the sound absorption coefficient by making some content changes in the mortar mixture used in the plaster layer. Within the scope of the research, the effects of the lightweight aggregate type used in the plaster layer on the sound absorption coefficient were investigated. The use of flax fiber and polypropylene fiber additive in the plaster layer produced with perlite aggregate was researched, and its effects on the sound absorption coefficient were detailed. Also, the utilization of crumb rubber instead of perlite aggregate was examined, and its effect on the sound absorption coefficient was investigated. In this study, besides sound absorption coefficient tests, compressive strength, flexural strength, open porosity, and capillary water absorption tests were performed. It was determined that the use of lightweight aggregate type can positively affect the sound absorption coefficient. It was identified that polypropylene fiber additives can increase sound absorption at high frequencies and flax fiber additives can increase sound absorption not only at high frequencies but also at low frequencies. It was observed that the use of crumb rubber additives can significantly increase sound absorption at low frequencies and it can enhance sound absorption at high frequencies. As a result, systematic research was performed to increase the sound absorption coefficient in the plaster layer.

应在不损害现有历史建筑的情况下进行历史建筑的修复，并应根据历史建筑的结构确定材料的选择。除了选择与历史结构兼容的材料外，选择能够改善空间内部声学质量的材料也是重要的参数之一。在这项研究中，研究了增加灰泥层中的吸声系数以提高历史场所的声音质量。因此，在这项研究中检查了用天然水硬性石灰粘合剂制备的灰泥层，这些灰泥层常用于修复体中。目的是通过改变灰泥层中使用的灰浆混合物的含量来增加吸声系数。在研究范围内，研究了石膏层中使用的轻质骨料类型对吸声系数的影响。研究了亚麻纤维和聚丙烯纤维添加剂在珍珠岩骨料生产的灰泥层中的使用，并详细介绍了其对吸声系数的影响。此外，还研究了利用碎橡胶代替珍珠岩骨料的方法，并研究了其对吸声系数的影响。在这项研究中，除了进行吸声系数测试外，还进行了抗压强度，弯曲强度，开孔率和毛细管吸水率测试。已确定使用轻质骨料类型可以对吸声系数产生积极影响。可以确定的是，聚丙烯纤维添加剂可以增加高频的吸声，而亚麻纤维添加剂不仅可以增加高频的吸声，而且还可以增加低频的吸声。观察到，使用粒状生胶添加剂可以显着增加低频时的声音吸收，并且可以增强高频时的声音吸收。结果，进行了系统研究以增加灰泥层中的吸声系数。可以确定的是，聚丙烯纤维添加剂可以增加高频的吸声，而亚麻纤维添加剂不仅可以增加高频的吸声，而且还可以增加低频的吸声。观察到，使用粒状生胶添加剂可以显着增加低频下的吸声，并且可以增强高频下的吸声。结果，进行了系统研究以增加灰泥层中的吸声系数。可以确定的是，聚丙烯纤维添加剂可以增加高频下的吸声，而亚麻纤维添加剂不仅可以增加高频下的吸声，而且还可以增加低频下的吸声。观察到，使用粒状生胶添加剂可以显着增加低频下的吸声，并且可以增强高频下的吸声。结果，进行了系统研究以增加灰泥层中的吸声系数。