Page 133 - RoadCem Manual - PCT BV
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 Figure 5.26 Phenolpthalein reaction in stabilised subbase.
5.4 RoadCem Stabilization - Mix Specification
Using RoadCem/Cement as the stabilizing agent in pavement structure based on in-situ material is a function of many different parameters which are location specific. These parameters are:
• In-site material characteristics.
• Geotechnical conditions along the route of the road to be constructed.
• Cement type.
• Traffic load, intensity and growth.
• Required durability of the road.
• Maintenance specifications.
This requires that each specific case has to be considered separately in order to prepare an optimal design and a custom most economial solution. To do this requires that laboratory test samples are prepared and tested before the final design is specified.
However, in practice one is often asked to consider a situation where only limited data and information is available and yet it is expected to come up with a sufficientley robust design that represent the basis for the techno-economical comparison of different alternatives and this often without adequate resources allocated for field and laboratory tests.
The guidelines given for mix specification in this document have been prepared with the above situation in mind and to provide sufficent elements for the conceptual design. The manual can be used at the earley stage of the project when different design alternatives are considered and when an appropriate selection of the most appropriate design needs to be made.
The starting point is the Unified Soil Clasification System discussed and presented in Chapter 4 and summarised in figure 4.2. For each of the soil groups within the USCS the dose of RoadCem and Cement (based on CEM I 42.5N) is defined and this is a starting point for more detailed analysis at the later stages of the design process.
  In principle, the following rules will apply:
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