The aim of this paper is to study and optimize the thermal performance of new lightweight and insulating composite blocks (CBlocks). These CBlocks are made up of a central expanded polystyrene (EPS) layer and two lightweight concrete layers with cavities. The aggregate of the lightweight concrete is pumice. A complete corner wall composed of six composite blocks and a specific corner block is numerically analyzed for different thermal conditions. Numerical methods were used in order to obtain the thermal behavior of these CBlocks. On the one hand, material thermal conductivity, convection and radiation inside the cavities were considered in this problem. On the other hand, the variation of the cavities was also taking into account. Finite Element Method (FEM) and Design of Experiments (DOE) have been used to study and analyze this problem. This numerical study reaches the thermal behavior of these new insulating CBlocks and provides new useful information for researchers and builders.

本文的目的是研究和优化新型轻质和隔热复合材料砌块（CBlocks）的热性能。这些CBlock由中央膨胀聚苯乙烯（EPS）层和两个带孔的轻质混凝土层组成。轻质混凝土的骨料是浮石。针对不同的热工条件，对由六个复合砌块和一个特定的砌块组成的完整墙角进行了数值分析。为了获得这些CBlock的热行为，使用了数值方法。一方面，在该问题中考虑了腔内的材料导热性，对流和辐射。另一方面，还考虑了空腔的变化。有限元方法（FEM）和实验设计（DOE）已用于研究和分析此问题。