The remelting shall be done at the site in a mechanical mixer; the mastic temperature shall not exceed 200 degrees C during remelting. 2. The bitumen mastic blocks shall be broken into pieces and then stocked in layers first round the sides and then inwards towards the center of the mixer. 3. The mastic shall be gradually heated to about 200degrees C. 4. When the mastic attain a molten condition, it must be agitated continuously to ensure a uniform consistency. 5. The duration of heating shall be decided such that the properties of bitumen are not impaired.