Fracturing concrete then rolling it removes existing pavement distresses and eliminates future slab action delivering a structurally sound base that prevents reflective cracking in the overlay.
“Modified rubblisation” describes the process of producing larger broken particle sizes that compensate for a weak subgrade/base.
Cracking concrete slabs to reduce their effective length, then seating the cracked slabs to re-establish support between the sub-base and the slabs.
This minimises the occurrence and severity of reflection cracks in the overlay caused by slab action.
Some specifications require the road be opened to traffic soon after the crack process to accomplish the seating prior to paving the overlay. Other specifications require a proof roller be used to seat the cracked concrete.
This method employs more energy than crack & seat in order to sever any reinforcing steel thus causing more spalling of the concrete surface.
Specifications typically require several passes with a proof roller to seat the broken concrete.
Rubblise 350mm thick pavement up to 4.0 m wide per pass for an average of 1 lane over 1.5kms per MHB 10-hour shift.
The low vibration level of lightweight hammers means you can break close to structures and over underground utilities.
Production rates of 3.0 to 5.0 lane kms per MHB per shift when breaking to 600mm minus removal specification.
Selectively break pavement sections without damaging remaining adjoining sections.
Crack and seat, break for removal or rubblise concrete pavement over cement treated base (CTB) without damaging it.