B-7 "Construction Joint :
1. Construction joint are to be provided between paving grid sections at their high point perimeters. Construction joint shall be used to provide interface between areas of slab placed at different times.
2. The existing surface of concrete construction joints shall be:
a) mechanicaly roughened to an amplitude of 5mm,
b) cleaned and all laitance removed.
c) wetted and all standing water removed, prior to placement of new concrete.
3. Wet sandblast or light bush hammer to expose clean sound aggregate.
4. Tie Bar DB 12x1000 rebar @ 300 for T =100 slab
5. Tie Bar DB 16x1250 rebar @ 300 for T =150 slab"