With its low unit weight, expanded perlite (EP) offers significant advantages in heat and sound insulation in the construction sector. However, due to its high-water absorption capacity, EP affects the physical and mechanical properties of concrete negatively. Therefore, it is aimed to reduce water absorption by coating the EP with polymer and thus to improve its mechanical and physical properties. In this study, mortar production was carried out by replacing coated and uncoated EP with CEN reference sand at 0%, 20%, 40%, 60%, and 80% respectively. The effective water/cement ratio of all produced mortar samples was determined to be 0.6. For coated and uncoated EP aggregate mortar series, unit weight, compressive strength, bending tensile strength, water absorption, ultrasonic pulse velocity (UPV), and thermal conductivity coefficient were determined. The results showed that the unit weight of the mortar samples decreased as the amount of EP increased, but their physical and mechanical properties also changed. Mortar samples with better thermal insulation properties were obtained with decreasing thermal conductivity values. The polymer coating of EP improved physical and mechanical properties. Especially in the 80% substituted EP series, the thermal conductivity decreased from 1.20 to a coefficient of 0.91 W/mK.

膨胀珍珠岩（EP）的单位重量很轻，在建筑行业的隔热和隔音方面具有明显优势。但是，由于其高吸水能力，EP对混凝土的物理和机械性能产生负面影响。因此，旨在通过用聚合物涂覆EP来减少水的吸收，从而改善其机械和物理性能。在这项研究中，通过分别用0％，20％，40％，60％和80％的CEN基准砂代替涂覆的和未涂覆的EP进行砂浆生产。所有生产的砂浆样品的有效水/水泥比确定为0.6。对于有涂层和无涂层的EP骨料砂浆系列​​，单位重量，抗压强度，弯曲抗拉强度，吸水率，超声脉冲速度（UPV），测定导热系数。结果表明，随着EP含量的增加，砂浆样品的单位重量减小，但其物理和机械性能也发生了变化。在降低导热系数的情况下获得了具有更好隔热性能的砂浆样品。EP的聚合物涂层改善了物理和机械性能。特别是在80％取代的EP系列中，热导率从1.20降低到0.91 W / mK的系数。EP的聚合物涂层改善了物理和机械性能。特别是在80％取代的EP系列中，热导率从1.20降低到0.91 W / mK的系数。EP的聚合物涂层改善了物理和机械性能。特别是在80％取代的EP系列中，热导率从1.20降低到0.91 W / mK的系数。