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Bio-Based Stabilization of Natural Soil for Rammed Earth Construction: A Review on Mechanical and Water Durability
Taiwo Sesay1, Yuekai Xie1, Yue Chen1
1School of Engineering and Technology, UNSW, Canberra, ACT 2612, Australia.
Polymers
|May 14, 2025
Summary
Bio-based rammed earth (RE) shows promise for sustainable housing, enhancing structural effectiveness and environmental friendliness. Further research is needed to address data gaps and improve durability assessments for wider adoption.
Area of Science:
- Civil Engineering
- Materials Science
- Sustainable Construction
Background:
- Rammed earth (RE) is an ancient construction technique increasingly relevant for sustainable housing.
- Traditional RE often requires stabilizers like cement or lime, impacting its environmental footprint.
- Bio-inspired stabilization methods offer a sustainable alternative to conventional stabilizers.
Purpose of the Study:
- To review recent advancements in biologically stabilized rammed earth (BRE).
- To assess the impact of bio-based materials on the mechanical strength and durability of RE.
- To identify challenges hindering the industrial adoption of BRE and suggest future research directions.
Main Methods:
- Literature review of studies published in the past decade on bio-stabilized rammed earth.
- Analysis of various bio-based materials used for soil stabilization in RE construction.
- Evaluation of the effects of these materials on mechanical properties and water resistance of RE.
Main Results:
- Bio-based rammed earth (BRE) demonstrates encouraging mechanical performance and durability.
- Various bio-based materials have been explored as stabilizers for natural soil in RE.
- The review highlights positive outcomes in mechanical strength and water durability.
Conclusions:
- BRE technology offers significant potential for enhancing sustainability in the construction sector.
- Gaps in data, soil-biomaterial interactions, and durability evaluation methods create barriers to widespread adoption.
- Further research is crucial to build confidence and facilitate the industrial implementation of BRE.
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