Low-carbon and sustainability considerations of soil waste stabilisation

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a new index (Icse) for evaluating soil stabilisation sustainability, integrating strength and carbon emissions.

🏢実務担当者:Useful for selecting low-carbon soil stabilisation methods in construction projects, aiding in carbon footprint reduction.

🏛政策担当者:Could inform regulations promoting low-carbon construction materials and methods.

The aim of this study is to propose a sustainable framework for soil stabilisation by integrating strength, durability, and stabiliser type (i.e. cement and soil stabiliser). A new index, Icse (i.e. (UCS100/UCS28)/(CO2×D)) was developed to reflect the relationship between unconfined compressive strength (UCS), carbon dioxide emission in the production stage, and dosage to represent the efficiency of strength development in soil stabilisation. Experiments were conducted on two soil wastes (i.e. Wenzhou and Guangzhou soils) and Kaolin. The results showed that UCS alone was insufficient for sustainable consideration, as stabilised soils may exhibit good early strength but poor durability under wet–dry or freeze–thaw cycles, highlighting the need to use Icse to indicate long-term performance. For cement-treated soils, Icse ranged from 6 to 11 at 10% to about 5 at 20% for all three soils. In contrast, stabiliser-treated soils showed several times higher Icse values compared with cement-treated soils. A 1-year field experiment was also conducted to evaluate the long-term performance under natural exposure, demonstrating the stabiliser’s continued strength development. However, Icse in this study was based on a simplified carbon assessment model that considered only production-stage carbon dioxide emissions and future work can be extended to analyse the full life cycle and cost assessment.

• openalex https://doi.org/10.1680/jenge.25.00192first seen 2026-08-09 05:10:11