Effect of Fiber Addition on Mechanical and Thermal Properties of Compressed Earth Blocks
Keywords:
Compressed Earth Blocks, Natural Fibers, Natural Fiber Reinforcement, Thermal Properties, Soil CharacterizationAbstract
Compressed earth blocks (CEBs) represent a sustainable and low-carbon alternative to conventional construction materials. The performance of CEBs is strongly governed by the physical and chemical properties of the raw earth, including the chemical and mineralogical composition of the clay fraction, particle size distribution (PSD), and plasticity characteristics. This review examines how these fundamental soil properties influence the mechanical, thermal, and hydric behavior of CEBs. Particular attention is given to the incorporation of natural fibers as an eco-friendly reinforcement strategy. The addition of fibers such as wheat straw, sawdust, or other plant-based materials significantly modifies both mechanical and thermal properties by increasing porosity, reducing bulk density, and providing crack-bridging mechanisms. While optimal fiber contents improve compressive strength, flexural strength, and ductility, they also enhance thermal insulation by lowering thermal conductivity and diffusivity. This review presents the effect of adding fibers on the mechanical and thermal properties of compressed brick blocks.
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