Page 34 - Microsoft Word - 20120528 Unesco study

3.4.2 PowerCem based constructions
The constructions using the PowerCem technology are based on a RoadCem-cement bound
base course with a surface layer on top. Figure 3.13 shows a schematic cross section of the
construction.

Figure 3.13: Schematic cross section of a RoadCem construction

Base-course
The base course will be formed with a mixture of RoadCem and cement. The amount of
RoadCem and cement depends on the soil type which has to be bound. In table 3.3 the
indicative amounts of RoadCem and cement are given for the different soil types. These
amounts are used for further calculations in this study.

Soil type Amount of RoadCem Amount of cement
3
3
Soil type 1 2,2 kg/m 220 kg/m
3 3
Soil type 2 2,0 kg/m 200 kg/m
3
3
Soil type 3 1,8 kg/m 180 kg/m
3
3
Soil type 4 1,6 kg/m 160 kg/m
3
3
Crushed old construction 1,5 kg/m 150 kg/m
Table 3.9: Indicative amounts of RoadCem and cement

The thickness of the RoadCem-cement layer depends on:
- Bearing capacity of the soil.
- Physical properties of the RoadCem cement layer.
- Expected amount of traffic.

The different constructions for the different soil types and traffic amounts are summarized in
table 3.10. The pavement calculations are given attached in appendix 3.

33