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Study on the Mechanical Properties of Modified Sludge Soil Based on an SM-C Modifier
Jun Nie1, Kai Zhang2,3, Xiangyang Fan2,3
1Nanchang Expressway Co., Ltd., Nanchang 330009, China.
This study enhances dredged silt for roadbed construction, improving its strength and meeting technical requirements. Modified silt offers a sustainable solution for lake area infrastructure development.
Area of Science:
- Geotechnical Engineering
- Environmental Engineering
- Materials Science
Background:
- Dredged silt from lake areas poses disposal challenges.
- Road construction in lake regions requires suitable, stable filling materials.
Purpose of the Study:
- To assess the engineering applicability of modified dredged silt as a roadbed filling material.
- To provide a harmless and resource-efficient treatment for dredged silt.
Main Methods:
- Silt pretreatment and mechanical performance testing (compaction, UCS, CBR, triaxial, consolidation).
- Evaluation of modified silt properties with varying modifier dosages.
Main Results:
- Increased modifier dosage improved compressive and shear strength, and CBR values.
- Modified silt achieved >96% compaction, 0.819 MPa UCS, 17.5 CBR, 78 kPa cohesion, 27° friction angle at 10% modifier after 7 days.
- Low compressibility and met roadbed technical requirements.
Conclusions:
- Modified dredged silt is a viable, high-performance material for lake area roadbeds.
- This research offers eco-friendly solutions for sediment management and infrastructure development.
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