Page 5 - PowerCem Reinstatement of Agricultural Land

Reinstatement of RoadCem Stabilised Soils
Depending on the subgrade soil type and the amount of cementitious binder used it may be necessary to use a low dose of standard agricultural grade active products, which are commonly used within the industry to manage the pH levels in naturally acidic soils. The need to use this technique will be determined in the pre-contract laboratory testing and illustrated in the form of a pH neutralisation curve established during laboratory testing.
Once the laboratory testing has been completed and all parties are agreed on the viability of the stabilisation process and reinstatement methodology the works can commence on site and the stabilised soil structures used for their temporary applications.
Reinstatement Process
The start of the stabilisation process involves the use of a deep winged-tine subsoiler to break up the stabilised layer, followed by the use of the Stehr or Wirtgen mixing machine to further break up the stabilised layer into a pulverised material; additional passes will ensure the soil is returned to a finely granulised material. On site DCP probing and random trial pitting will be used to verify the removal of the full depth of the stabilised layer.
At this stage site sampling of the granulised subgrade soils will be used to check the residual pH value of the soil; this will further inform what dose of active product will be required to reduce the pH level back to the acceptable range, using the product specific laboratory developed neutralisation curve.
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