Study on mechanical properties and modification mechanisms of construction waste soil modified by activated clay-calcium carbide slag
Open accessAbstract
The disposal of construction waste soil has become a major challenge for sustainable infrastructure development. Currently, conventional binders such as cement and lime are widely employed for the stabilization of construction waste soil. However, their overuse leads to severe environmental damage and high carbon emissions. Utilizing calcium carbide slag and activated clay for the improvement of construction waste soil not only enhances its mechanical performance but also facilitates the secondary utilization of industrial solid wastes. In this study, the mechanical properties of modified soil were tested by unconfined compressive test and triaxial test. The micro-mechanism and pore structure of modified soil were analyzed by XRD,SEM and MIP test. The test results showed that the maximum increase in unconfined compressive strength (UCS), internal friction angle and cohesion of the modified soil compared to the control group were 78.5%, 13% and 62%, respectively. In addition, the incorporation of activated clay can promote the hydration reaction and generate more flocculent hydration products. These hydration products are filled between the soil particles, making the internal structure of the soil more compact.
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References 43 · Cited by 1
- Authors
- Zhang, F., Cao, Z., Wu, H., Wu, H., & Wang, W.
- Affiliations
- Shaoxing University (CN)
- Corresponding author
- Zhang, Fang
- Cao, Zhimin
- Wu, Hongxiang
- Wu, Hao
- Wang, Wei
- Venue
- Materials Research Express
- Publisher
- IOP Publishing
- Published
- 2025-11-01
- Volume
- 12
- Issue
- 11
- Pages
- 115311
- ISSN
- 2053-1591 (ISSN-L)
- OpenAlex
- W4416715506
- Cited by
- 1
- References
- 43
- Citations by year
- 2026: 1
- FWCI
- 0.37
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Materials Research Express (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Project supported by the Joint Funds of the National Natural Science Foundation of China (U2244228)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Geotechnical Engineering and Soil Stabilization
- Physical Sciences › Engineering › Civil and Structural Engineering › Geotechnical and construction materials studies
- Physical Sciences › Engineering › Mechanical Engineering › Materials Engineering and Processing
- Keywords
- construction waste soil, soil stabilization, carbide slag, activated clay, mechanical properties, unconfined compressive strength, internal friction angle, cohesion, pore structure, flocculation, hydration products, industrial solid waste reuse
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