Background to M11 Asphalt Reinforcement Trials
The results show the 20-year predicted traffic loading in lane 1 and lane 2 to be 83msa and 19msa respectively.
Contractor and design life
The successful contractor was La Farge. The design life requirements for the trial section are 20 years.
Programme of works for trial area
GridSeal® trials of 210linear metres (936sq.m.) were installed between chainages 2990 and 3110 on the M11 Southbound Junctions 10 to 9 in the early morning of Thursday 8th November 2007. The installation commenced at 12.00am and finished at 12.31am.
Present during laying by Asphalt Reinforcement Services were Howard Cooke and Ian Walker of ARS and Chris Sullivan of Material Edge Ltd. Also in attendance were TRL representatives.
Treatment in the Hard shoulder was not part of the trial. The surface was planed down 60mm and 25mm of regulating was put back followed by 40mm surface course.
Treatment in Lanes 1 and 2 GridSeal® trials
The weather throughout laying was dry and cool (about 5°C), the surface was swept clean using wet and dry vacuum road sweepers.
Plane off 110-115mm of existing asphalt leaving about 30mm over the CBM and sweep clean. Replaced with:
During laying the chipping lorry damaged a small 1m x 2m section of the GridSeal® resulting in an area of pad coat and GridSeal being removed and replaced by hand. This was located in the centre of lane 2 at Chainage 2990. The repair was installed to the satisfaction of those supervising.
Otherwise there were no observed difficulties in installation over subsequent overlaying of the GridSeal® system.
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Tags: asphalt, trial, highways
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