Optimisation of Compressed Earth Blocks (CEBs) using natural origin materials: A systematic literature review

A Systematic Literature Review (SLR) on the effect of the optimisation of Compressed Earth Blocks (CEBs) using natural origin materials was made in this paper. The purpose of the study is to offer a clearer vision of recent scientific developments on the topic by addressing a number of specifically formulated research questions. To this end, 45 journal articles and conference proceedings were selected following some inclusion criteria, i.e., the raw material (soil), shape (block), methods of compaction (mechanical or hydraulic press), preparation (unfired), the addition of natural origin materials (fibres, powders or ashes). Through a holistic approach, a discussion on the main physical, thermal, mechanical, and durability properties was conducted to find correlations and criticisms. Preliminary considerations are drawn on the sound insulation and fire resistance properties and on the economic performance and environmental impact of optimised CEBs, opening a brief discussion on some sustainability indicators. The research outcomes may encourage researchers to find new solutions to improve the proprieties of earth building materials to promote their broader use and more sustainable buildings.

Automated summary

This paper conducted a systematic literature review on the optimization of Compressed Earth Blocks (CEBs) using natural origin materials and discussed the physical, thermal, mechanical, and durability properties. The research outcomes provide a theoretical basis for promoting the sustainable use of earth building materials by encouraging researchers to find new solutions for improving their properties.