Page 39 - Microsoft Word - 20120528 Unesco study

A damaged road can be rehabilitated in two different ways:
1. Rehabilitation in the traditional way.
2. Rehabilitation using the PowerCem technology.

Traditional: RoadCem- cement

Figure 3.16: Remediation in traditional Figure 3.17: Remediation using the
way. PowerCem technology

Traditional reconstruction
For the traditional reconstruction of a damaged road, the road will be rebuilt with the same
materials as before.

After a flood the site has to be cleared of debris from the old damaged road construction,
vegetation and other washed up waste. Following the soil has to be compacted and leveled.
Before construction works can be started, the water table must sufficiently be decreased. A
saturated soil will not have enough bearing capacity what will lead to an early failure of the
new construction.

After the preparation of the site the new construction as described in paragraph 3.4 will be
reconstructed.

Reconstruction using the PowerCem Technology
The damaged road will be rebuilt using the PowerCem Technology. For the calculations it is
assumed that the old road construction is completely washed away. If the old construction
partly remains on the site, the debris can be crushed and reused in the new construction.

First the embankments have to be filled to the required levels. This can be done with all soils
or other granular material which are available on the site. Following this, the top soil has to be
stabilized with RoadCem and cement at the required thickness. The amounts of RoadCem,
cement and the required thickness are given in paragraph 3.4.

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