After receiving the confirmed profile level from the Engineer:
- The positions of points from survey data are marked on the pavement and the thickness required is also noted for each point. The areas need to be regulated with ACBC/DBM or as per in Bill of Quantities are also identified. Concurrently, pegs are positioned on the marked points. The level is determined (with the use of string) and checked with designer profile and approved by the Engineer’s site agent.
- Tack coat is sprayed on the areas to be regulated. Then, regulating work shall start on the undulation area first. The regulating works shall be done accordingly (with reference to the laid thickness per lift) to achieve the identified level. Referring to Note 1 (of Table 7/4, Series 700): the minimum thickness shall be 2 times the nominal size.
- On completion of regulating work, the laid premix is let to cure as per specification.
- Transverse key-joint is milled out.
- Prior to laying of final layer (ACWC), surface is ensured to be cleaned and tack coat is sprayed throughout the areas.
- 50 mm thick of ACWC is then laid and compacted.
- Compaction shall follow the rolling pattern established during the trial lay.
