- Titel
- Investigations on the stabilisation mechanisms of enzyme additives for improvement of soft clays and resulting engineering behaviour
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:l189-qucosa2-1059389
- Konferenz
- 1. Leipziger Geotechnik-Symposium. Leipzig, 13.11.2025 - 14.11.2025
- Quellenangabe
- Tagungsband 1. Leipziger Geotechnik-Symposium (LeiGS)
Seiten: 1-6 - DOI
- https://doi.org/10.33968/2025.53
- Abstract (EN)
- Clayey subsoils have a high affinity for moisture, making their bearing behaviour sensitive to moisture fluctuations, which are expected to increase due to the effects of climate change, distressing to overlying geotechnical structures, such as roadbeds. For subsoil improvement, conventional cementitious stabilisers are effective but carbon-intensive, motivating interest in more sustainable options, including enzyme additives. Research on the mechanical performance and mechanisms of enzyme-based stabilisation remains limited. A series of experiments was thus conducted in this study to investigate the effectiveness of enzyme-based soil stabilisation on the stiffness and strength behaviour. Moreover, the difference in bound water thickness between treated and untreated soil particles was analysed to understand the stabilisation mechanisms in relation to geotechnical response. The results indicate a significant increase in elastic modulus for enzyme-stabilised soils. Treated soils exhibit a reduced affinity for overall gravimetric water and bound water. A smaller water content and greater density in enzyme-treated soils highlight the improvement in soil consistency and thus stiffness and uniaxial compression strength, whereas the effects on shear strength are yet unclear. The reduced bound water thickness indicates a decrease in the overall thickness of the electric double layer around soil particles. Clayey particles are allowed to come closer to each other, thereby improving densification in the enzyme-treated soils. These findings support the premise that the enzyme stabiliser reduces the clayey soil’s affinity for water, thereby enhancing its stiffness and strength characteristics.
- Freie Schlagwörter (EN)
- Soil improvement, Enzyme additive, Engineering performance, Stabilisation mechanism
- Herausgeber (Institution)
- Hochschule für Technik, Wirtschaft und Kultur Leipzig, Leipzig
- Version / Begutachtungsstatus
- angenommene Version / Postprint / Autorenversion
- URN Qucosa
- urn:nbn:de:bsz:l189-qucosa2-1059389
- Veröffentlichungsdatum Qucosa
- 14.07.2026
- Dokumenttyp
- Konferenzbeitrag
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY 4.0