SECTION B - Derry City Council

Additional Clauses, Tables and Figures (Cont.)
Clause
(etc)
770AR
No
Title and written text
SURFACE CONDITION
1. The contractor shall thoroughly clean the existing or prepared surface of all
loose materials or foreign matter prior to laying macadam or asphalt, to the
satisfaction of the Project Manager.
2. If the Project Manager considers the surface too damp for laying the Contractor
shall dry the surface by the application of limestone dust or hydrated lime to
absorb any surface water and sweeping the whole surface to remove all traces
of the material. No laying of bituminous material shall take place until the
surface is dry to the satisfaction of the Project Manager.
771AR
SURFACING REINSTATEMENTS
1. All areas of excavated bitumen and asphalt surfacing, removed to allow
inspection and testing works to be undertaken, shall be reinstated
permanently using the original construction materials. Associated cutting
back and joint sealing will also be required. All materials shall be laid by
hand.
2. Sides of all excavations in bitumen or asphalt surfacing shall be broken out
so as to provide a cut-out with straight vertical sides.
3. Joint edges shall be formed by diamond saw cutting or cold milling in
accordance with Clause 709 and materials removed to the required depth.
The vertical faces of wearing course joints shall be painted with grade 160 /
220 pen bitumen or a cold applied thixotrophic bitumen.
4. All loose material shall be removed from the Works to an approved licensed
tip/ recycling area.
5. Replacement material shall match the existing removed materials.
6. A bitumen emulsion tack coat shall be sprayed at the rate specified in
Appendix 7/4 to any underlying exposed bituminous layer.
All construction layers shall be laid and compacted such that on completion each
layer shall be at the same level as the adjacent course within the tolerances indicated
in Table 7/1.
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