Repair & Rehabilitation of Provincial Road P/9, R103 Alberton- Pietermaritzberg via Heidelberg & Harrismith, South Africa.Client :
Department Of Transportation (DOT)Main Contractor:
M/s Shisalanga Construction Pty LtdSub Contractor:
Kaytech Engineered Fabrics (Responsible of TechGlass AIC Laying)Site Location:
South africaCompletion Date:
The National Highway N3 heads through south-western tip of Mpumalanga in the direction of Heidelberg. Wherever N3 has been realigned, the old route has been designated R103. The R103, also known as regional roads connects Alberton with Pietermaritzberg via Heidelberg and Harrismith. The road faces considerable traffic with reckless driving by passenger cars as it is considered as shorter bypass. The rehabilitation of the flexible pavement was carried out near Colensowhich is located on the southern bank of the Tugela River.
The road significantly undertakes moderate to heavy moving traffic loads with reckless driving and is considered as one of the worst roads having single carriageways with short passing zones. The weather remains very changeable with moderate to heavy rainfall and the condition of the road deteriorates very fast. The road was not designed to take such varying EASL’s and usually deteriorates very fast with pot holes /patch works are evident in stretches.
To strengthen the flexible pavement it was proposed to use a Geo-composite which could provide infiltration drainage coupled with tensile strength.
Under existing circumstances, TechGlass AIC (Geo-composite) was proposed as an Asphalt Interlayer below the resurfacing of 50 mm of Bituminous Concrete. TechGlass AIC range is a geo-composite is made from high performance glass fiber roving to form a reticular structural material with a unique combination of fiber glass and polyester Non – woven ,Needle-punched Geotextile with glass fiber tensile ability and the polyester fibre flexibility.
TechGlass AIC (50 KN/m) was found suitable and selected for the operation.
M/s Shislanga Construction under took the job of minor repairs. Pot Holes were cleaned and repaired by using hot mix asphalt concrete while cracks that existed on the road > 3 mm were sealed by using bitumen.
Tack of 80/100 Grade sprayed uniformed @ 1.1 kg / Sqm using dispenser. TechGlass AIC was saturated with bitumen by placing with and manual unwinding machine.
Asphalt was laid over TechGlass AIC 50 and comapcted with PTR Roller and Vibro Rollers as per the specifications.
TechGlass AIC reduces the development of cracks in the surface layer caused by the movement, bending and shearing of the concrete slab or cement bound substrate. The Stress Absorbing Member Interlayer caused by Non-woven Geotextile effect reduces strain in the overlay by promoting Tension Membrane Effect. This property of the TechGlass AIC also reduces the traffic induced tensile strain in the bottom of the asphalt layer that leads to cracking.
TechFab India Industries Ltd.
711/712, Embassy Centre,
Nariman Point, Mumbai – 400021
022- 2287 6218