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soil and silt stabilisation
Soilutions have extensive experience in providing equipment and resources to undertake soil and silt stabilization.
Soil or silt stabilization is a remedial process utilized to bind or lock-in contaminates within the soil or silt matrix. The major benefits of this treatment process are that the material can either be retained on site or disposed of to a suitable landfill site having met the pre-treatment criteria.
The process is ex-situ with the contaminated material being excavated, screened and crushed prior to blending with lime, PFA and/or cement to modify the structure of the soil matrix. The additives react with water forming a physical bond which immobilizes the contaminants through a pozzalanic reaction by changing the chemical constituents of the contaminates. The permeability of the treated material is reduced, thus inhibiting water movement and preventing leaching of the contaminates.
The moisture content of cohesive soils is also reduced, leading to a considerable improvement in bearing capacity. This technique is a cost effective alternative to importing aggregates for both temporary and permanent works.
The controlling factors in the process are:
- The volume and grading curve of the material.
- The concentration of the contaminates present.
- The available space for plant and equipment.
Mobilization to site and preparation of the treatment area will generally take five days. Optimum throughput of the blending plant is approximately 100 tonnes per hour, depending on the nature of the material.
