The qualified engineer with experience in stabilisation will look at a host of factors in determining the best approach to creating a durable long lasting sub-base. Elements that warrant particular attention are:

• Plasticity
• Moisture content
• Sulfur compounds
• Organic matter
• Strength Characteristics

In addition, the design of the mixture will take into account factors relating to the use of the stabilised site. The stabilisers used affect the properties of the final mixture. For example:

• Quicklime reduces plasticity and makes the base more workable with moisture.
• Quicklime in combination with other stabilisers can lead to chemical changes in the stabilised mixture.
• Pfa reacts with quicklime and this reaction is altered by ambient local temperature.
• Ggbs is activated by Quicklime. It can provide greater strength than Quicklime alone, but attention has to be paid to ambient temperature and the time allowed for the mixture to cure.
• Cement with or without Lime can be used to achieve quicker strength targets.
• Moisture Content throughout the stabilisation process can result in differing effects.

In all cases the prepared mix must be carefully analysed and monitored during preparation and storage. Laboratory analysis on demand is essential for quality results. During the construction period more testing and monitoring is required to make sure a uniform mix is achieved throughout the process.

There is nothing intrinsically complex about stabilisation. It therefore offers good commercial benefits during construction and thereafter. All that is required is to use top quality professional expertise in design, construction, and testing throughout the process to ensure the long-term durability of the stabilised area.