A Variety Of Experiences & Observations

Report on the use of Geo R Bond to improve the Strength of Low-strength Pavement Materials
unsealed road that becomes impassable in the wet
road conditions generally deteriorated due to normal traffic and ten road trains per day
sections treated with Geo R Bond subject to wheel loads showed very little surface damage
compacted treated material tightly bound together
compacted natural material without Geo R Bond would not have withstood wheel loadings without breaking up
treated surface withstood effects of traffic far better than adjoining sections
treated material very hard and dry
addition of Geo R Bond improves strength of material
cost to incorporate Geo R Bond into 200mm of pavement quite low
significantly reduced cost of construction

Geo R Bond has performed very well
Little sign of surface deformation (wheel path rutting) and loss of material from the surface
Surface is very 'tight' and dense
Does not exhibit any significant cracking or signs of breaking up
Indications point to Geo R Bond as the most effective stabiliser
It does have some ‘water proofing’ effect on pavement materials
It is also the cheapest product
Used in both black soil base material as well as gravel used for road construction
Alleviates problems due to pavement saturation and water ingress

Geo R Bond formation stabilisation in black soil
Average CBR of 9 (untreated)
CBR between 32 and 40 (treated) obtained from outer edge of profile
CBR of 50 to 60 on primary treated formation
Track recording vehicle shows a trend for improvement
Cost benefit proving successful
Maintenance crews indicate an improvement on track running performance
Feedback from line rail operator that a noticeable ride difference identified
Cost impact minimal with respect to outcomes and cost of implementation
Cost effective:
- Near no impact on relay production
- Minimal supervision
- Reduced resurfacing costs
- A formation which can maintain track performance without attention for longer periods
- Will continue the stabilisation process in all locations defined as black soil
Recommendation to apply the product in projects where black soil or clay-based formation is present

Regiment aimed to prevent erosion and keep the road open to traffic
Slope was greater than 45% and road deeply rutted and scoured
Prior to work, in-situ CBR was 8 – too low for emergency vehicle traffic
Post-treatment in-situ CBRs were 23
Area examined over a couple of years, found not to be scoured out
Repaired roads carrying ¾-ton light vehicles up to 20-ton heavy vehicles with no rutting after 12 months
Roads damaged by 54-ton tanks have been finished
No signs of erosion or heavy rutting as before
Tanks have traversed the road since repair

This company are the only ones to have taken an interest in our works
Have come to sites a number of times to offer advice and assistance
Where Geo R Bond applied the road is dry, hard and perfect; where it hasn’t, the road was wet, boggy and untrafficable
Considering the outrageous cost of gravel and transporting it to Wet Tropic roads, only to have it washed off in the next downpour, or have the poor local soils being wheel rutted and turning into immediate road drains, this seems to be the way to go
Demonstrated to all our park road managers as a technique to alleviate the problems we as a department are continually facing
Considering the road problems on Cape York parks and lack of gravels, a winner financially and environmentally
This product has been used extensively in the Burketown area and been very successful after the past few wet seasons
A major benefit where we have had problems obtaining gravel, especially sourcing and opening pits