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Cracking idea

Highways

Between junctions one and two of the M60 heavy cracking of the carriageway has led to user complaints so GPR has been used to work up a repair solution.

'It allowed us to find exactly where the voids were, ' says Chambers.

Cracking of the concrete was severe enough for water to be seeping into the voids. 'We are bidding for funds from the Agency to repair the concrete and replace the surfacing.

Initially the reinforcement bars were getting in the way of the radar. So we did a trial on a 500m section, moving the radar at a slow speed allowing us to get high resolution images and we were then able to fi lter out the effects of the reinforcement, ' he says.

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