Concrete Pavement Rehabilitation using HES Steel Fibre Reinforced Concrete
Peter Carson1, Chris Sinclair2, Jaun Meyer3, Kriti Dhital4, Bryce Neely5, Mark James6
1 Engineering Manager, B Eng (Civil), B Surv, MPTech, MPM, Carson Group 2 B Eng (Civil), Georgiou Group
3 Senior Assoc Engineer, BSc Hons (Civil Eng), SMEC Australia
4 Experienced Engineer, B Eng Hons (Civil), SMEC Australia
5 Project Manager, B Eng (Civil) Hons 1, Daracon Group
6 B Eng (Civil) Hons 1, Asset Engineer Pavement Planning North, TfNSW
A large number of concrete pavements are approaching the end of their 40 year design life. This phenomena is regularly accompanied by a need to amplify the capacity by adding lanes of traffic due to increased volumes and is complicated by an increased need for stronger thicker pavements. Rigid pavement design has evolved in Australia with base pavement thickness in the 1970’s to 1980’s typically 200-220mm and modern pavements typically 250-280mm. Saturated road networks often in heavily constrained corridors do not have sufficient capacity to allow lane closures without causing major disruption to daily traffic. The challenge is to carry out rehabilitation and slab replacement during night shifts and then open the newly constructed slab to traffic by daybreak. This requires use of high early strength concrete.
This paper provides a case study of the Hexham Straight (Maitland Road) which is one of the heaviest trafficked arterial roads near Newcastle, NSW, Australia. Rehabilitation and widening of Hexham Straight is to be undertaken by Hexham Straight Widening Alliance in 2023-2025.
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