AGRN1258 Secondary and Local Roads Emergency Reinstatement - Pavement Rehabilitation and Protection - Kurundi Floodway - CH51.55 to CH52.35

Full rehabilitation and protection of pavement condition to ensure safe and roadworthy access
undertaking pavement repair, reclamation, surface protection, and resealing to maintain durability under future weather impacts.
These activities form part of the Immediate Reinstatement Works (IRW) program to restore trafficability and ensure road-user safety following extensive flood damage under Event 1258 - Barkly Region Secondary and Local Roads Emergency Reinstatement.

SCOPE OF WORKS:
The scope includes, but is not limited to:
Pavement Repairs;
Nominal 50mm loose top-up Type 2 Natural Gravel or Fine Crushed Rock shall be incorporated for pavement shape correction. A 7-day Unconfined Compressive Strength (UCS) test result may be utilised to determine the required cement stabilisation dosage. All process control and conformance testing shall be appropriately programmed and coordinated to ensure construction activities are not delayed or impeded.

Pavement Reclaim:
1, Undertake full-width pavement rehabilitation works across the 10m floodway section between existing margins.
2. Pulverise, mix and moisture condition the existing pavement incorporating 50mm loose top-up Type 2 Natural Gravel or Fine Crushed Rock with cement modification at a nominated application rate of 6kg/m2 to a compacted depth of 200mm.
3. Compact the reconstructed base course layer to a minimum of 98% MMDD, within ±1% OMC.
4. Finished pavement crossfalls shall conform to the requirements of Standard Drawings CS3003 and CS3610.

Protection Works:
1. Saw cut, remove and dispose of all damaged, displaced, and deteriorated concrete margins.
2. Reconstruct shoulders, outer batters, and trench new margins, including installation of reinforced concrete margins or an approved equivalent alternative treatment.
3. Allow for approximately 200 linear metres of displaced concrete margin requiring replacement and reinstatement.

Spray Sealing Works:
1. Spray sealing works shall achieve the specified overall sealed pavement width,
2. Following completion of the cement modified pavement reconstruction works, the treated
pavement shall be allowed to cure for a minimum period of 24 hours prior to sealing.
3. Apply an AMC5-AMC6 primer seal incorporating 14,7mm pre-coated aggregate at a nominal
S10E binder application rate of 1.6L/m2.

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