In the past, re-sheeting was the norm when maintaining unsealed roads. But as gravel pits close for environmental and other concerns, the challenge of sourcing good materials continues to grow. Resulting price rises are becoming more and more inhibitive.
There are also other factors to consider when evaluating the cost of re-sheeting.
1. Repeated heavy truck loading to the section being re-sheeted often leads to deterioration of the council roads leading to the road being maintained. 'Chasing your own tail' in this manner is financially unsustainable.
2. As gravel pits continue to close for various reasons, the purchase of material and cost of transport to site becomes more expensive. Heavy trucking routes are also extended, resulting in further cost to road authorities.
One of the many reasons new material is imported is to overlay clayey materials which soften when wet. These sections then require ongoing maintenance to meet service intervention levels and prevent dangerous driving conditions.
Many councils have adopted a new method to recycle their existing road materials without bringing in new gravel - at almost half the cost of re-sheeting. The innovative solution decreases the need for maintenance grading by up to six times.
The outcome is an unsealed pavement that requires less maintenance and costs less than the traditional alternative of re-sheeting. The road performs better in wet weather and produces less dust in the dry by utilising existing clayey or higher PI materials. The road maintains shape, and saves the damage caused by heavy truck movements to both sealed and unsealed council roads.
Studies reveal this is easily achievable when using PolyCom Stabilising Aid.
To find out more, contact Earthco Projects on 1800 790 907 or visit www.earthcoprojects.com.au. An experienced team member will work on site with your crew to ensure you achieve a sustainable unsealed road outcome.
© Earthco Projects 2015