THERMO-PHYSICAL PERFORMANCE ENHANCEMENT OF WALL MATERIALS USING ADVANCED ADDITIVES AND COMPOSITE SYSTEMS

Abstract

This paper presents a concise analysis of modern approaches for improving the thermal conductivity and thermal resistance of wall-building materials, including concrete, bricks, blocks, and composite systems. While low thermal conductivity is generally preferred for insulation purposes, certain engineering applications such as radiant heating systems, thermal energy storage, and PCM-based structures require enhanced heat transfer properties. At the same time, thermal resistance remains a critical parameter for ensuring fire safety and structural stability at elevated temperatures. The study examines the influence of advanced additives such as silicon carbide (SiC), carbon nanotubes (CNT), expanded graphite (EG), magnetite (Fe₃O₄), vermiculite, and basalt fibers. The results indicate that conductive additives significantly increase thermal conductivity, while mineral fillers and fiber reinforcements improve thermal resistance up to 300–1000°C depending on the composition.