Domestic / Residential

HydroMulching - Erosion Control, Seeding & Rehabilitation

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History

Sunhawk has consolidated the hydromulching power of 4 different companies in Western Australia. By rationalizing the fleet of on-road and off-road vehicles, as well as modernizing equipment, techniques and specifications, Sunhawk has the ability to quickly and efficiently stabilize the smallest, domestic blocks to the largest mine sites.

Description

Hydromulching is the application of slurried mulch, whether that is paper fibres, mushroom compost or even synthetic polymers, to the surface of stockpiles, broadacre subdivisions or mine reclamation areas. This application can be done through the use of hand-held hose, water cannon, boom spray or even aeroplane. The client has the option of having Sunhawk add any combination of tackifiers, seeds, fertilizers or dyes.

Hydromulching or Hydro seeding is a full service process requiring specialized equipment and experienced personnel. For those clients who wish to control their blowing sand and dust problems themselves, they need to contact Sunhawk and inquire about purchasing Gluon 240.

Uses of Hydromulch

Principally applied to large, sandy tracks of land such as those opened up by property and land developers, government departments, civil contractors and mining companies, Hydromulch is applied to suppress windblown dust, prevent wind erosion, improve appearances, and accelerate re-vegetation and/or environmental rehabilitation.

What is Hydromulch?

Typically, a mix of water ‘hydro’ with newsprint paper ‘mulch’, and other additives suited for the particular purpose.

Additives might include selected seeds and fertilizers for re-vegetation, dyes for colouring the surface, and/or a variety of chemicals/emulsions such as Sunhawk’s Gluon240 (see separate documentation) for broadacre and stockpile stabilization.

How is Hydromulch applied?

Using Sunhawk’s specialized fleet of hydromulching vehicles, application is an economical ‘one-step’ process.

With so many vehicles Sunhawk can quickly and efficiently hydromulch large areas at short notice.

Sunhawk’s hydromulching vehicles (mobile units) are all 4WD or 6WD to handle almost any terrain. (e.g. for particularly soft soil areas such as tailings dams we have a 4WD Mercedes ‘dinosaur’)

Each vehicle has a high capacity agitator tank in which all additives are thoroughly mixed with water.

Special binders and other additives may be incorporated to ensure success in otherwise difficult terrain.

The resulting slurry is usually sprayed on using specialized, high capacity water cannon; sometimes using fan or boom sprays; or by hand-held hose where necessary.

Using Sunhawk’s specialized equipment and trained workforce you can be assured of a job well done first time.

Sunhawk vehicles can hydromulch many hectares per day, so when the notorious "Easterlies" blow in and your job site has turned into a sandstorm, Sunhawk can move quickly to solve the problem.

When to use Hydromulch?

Sunhawk has applied hydromulch to a wide variety of situations.

Often we are engaged by civil contractors who have opened up large, sandy areas to construct subdivisions. Sunhawk usually contains the raw sand with either paper mulch or Gluon to enable development work to commence and to keep the surrounding neighbourhood 'dust free'.

As development nears completion and the blocks are about to go on the market, we are called in to re-apply mulch with green dye, seed and fertilizer added. This provides an attractive outlook for prospective land buyers.

Other regular clients of Sunhawk's hydromulching division are mine sites. Dust can be a mission critical factor, even shutting down a mine site if levels are too high. It’s also a continual sore point with the surrounding community. This is why an increasing number of mine managers are choosing to have Sunhawk treat all open soil areas before windblown dust arises.

Of course, when the time comes to rehabilitate a mine site with native seeds, hydromulching is the quickest, most economical and effective method of re-vegetating large areas.

How long will it last?

This depends on many factors such as the characteristics of the soil surface to be treated, climate patterns, chosen mix, and intention of the application.

Contact your nearest Sunhawk representative (see below) to arrange an obligation free site inspection and consultation.

Gluon 240 - Broadacre & Stockpile Stabilizer

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  • Sand & Soil Dust Suppressant & Stabilizer
  • 100% Australian Made
  • Environmentally Benign
  • Extremely Easy to Apply

History

Various imported polymer emulsions have been around the soil stabilization industry for a number of years. Some have performed quite well, but their cost has made them totally unaffordable. Whereas the cheaper products (often watered-down versions of the expensive imports) just weren't up to the job. This is why Sunhawk has developed a "made-in-Australia" polymer emulsion that combines all the best features of the existing expensive imported polymers with affordability.

Description

Gluon 240 is a white, concentrated, liquid polymer emulsion, which is infinitely soluble when delivered but is totally insoluble when cured. A water-based emulsion, Gluon 240 mixes very readily with water that is used as a carrying agent and is then sprayed onto, or mixed into, the surface to be treated.

Available in 20 litre & 1,000 litre containers it is easily transported to distant jobsites and can often be applied with existing equipment onsite.

Application & Product Life

Gluon 240 is very easy to apply. Water is used as a carrying agent which conveys the product into the soil matrix. The water then evaporates and the polymer emulsion "sets" usually within a few hours leaving a wind and water resistant surface. Application can be done by hand spraying any small areas or embankments while power spraying, water trucks and specialized spraying vehicles such as dinosaurs are recommended for larger areas. For pathways and roadways the product should be incorporated into pre-moistened gravel using a rotary hoe or similar equipment.

The longevity of Gluon 240 can be varied with the choice of application rate. It can also be influenced by such external factors as soil type, weather and traffic patterns. Gluon 240 is usually used on non-trafficked areas although at the heaviest application rates it can withstand foot or even vehicular traffic. The lifespan can be roughly be divided into 3 categories:

Short Term (30-50 mils/sq.m.) - this is can be affected by local conditions such as wind and rainfall. A light spray is effective only where stabilization needs are short term, there are only light winds or the area is seeded with a cover crop and it is the growing season. The resulting thin crust is often used to "lock-down" a job-site over a long weekend or other break in the job schedule,

Medium Term (60-100 mils/sq.m.) - this is the more usual and lasting. In this method the surface crust is thicker and the Gluon 240 penetrates and binds itself to the soil. Instead of a thin crust sitting on top of the soil, the top 10 mms are firmly bound together. This results in a tough, integrated surface which is resistant to wearing by wind and sand scouring, undermining by water streamlets or wind-induced lifting of edges (sheeting). This can last for months,

Long to Very Long Term (150+ mils/sq.m) - this method utilizes Gluon 240 at the heaviest application rates but it can be either applied as a top down spray or incorporated directly into the soil matrix. The treated thickness of the soil becomes locked into a rock hard surface. The benefits can last for months or even years.

How It Works

As an acrylic polymer, Gluon 240 consists of extremely long molecular chains that “tangle" together with each other and with the soil matrix creating a homogenous bound surface. Gluon 240 is produced as a water-based emulsion in order to facilitate easy handling but after application the emulsion "breaks" and the water evaporates. This leaves behind the polymer chains, which are now insoluble. The resultant surface is now unaffected by water but is still, in all but the heaviest application rates, open enough to allow water to percolate through to the ground underneath. This allows for germination of any naturally or artificially sowed seeds from below the crust. While Gluon 240 itself is not usually used as a hydro-seeding medium in its' own right, it can be used as a tackifier. It is perfectly suited for over-spraying previously seeded areas as long as the light to medium application rates are used. The heavy to very heavy application rates can create a crust so strong and waterproof that they can be used for preventing vegetative growth if so desired.

Gluon 240's physical properties also enable the treated surface to crumble rather than tear when irresistible mechanical forces (vehicles, etc.) are applied. This stops the top crust from acting as a woven sail and coming off in sheets as with other surface stabilizers. Gluon 240 also lends itself very well to the addition of various dyes if required.

Pricing - Contacts

It can be charged by litre or by the square metre and either as a delivered product or as a complete service. Contact the nearest Sunhawk office and inform them of your job’s location and size and they will quickly be able to give you a price. Discounts for large volume purchases can be discussed.