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Sand forms the basis of most equestrian surfaces, however, not all sands are alike... there are many options to choose from and with various names for the same products which makes it confusing.
River, Shell, Limestone, Mortar, Quarry, Iron, Fines, Quartz, Sea, Silica, Shellrock, Pit sand, Crusher Dust, Black Sand, Manufactured Sand, Masonry, Concrete and there are many more including Arena Sand, EQ sand. they are all just names and will vary in makeup depending on where it was sourced from. Example: sand taken from a quarry in 2002 will be a very different sand in 2020 from the same quarry.
Sand is a natural product, basically crushed mineral. Different sands have varying particle sizes, shapes, colours, properties, and qualities. For a riding surface, you want to have a combination of grades to avoid instability or compaction, which happens when the surface is subjected to the elements with no maintenance (grooming). Sand surfaces can become compacted. Landing on this following a fall from your horse would be like landing on concrete.
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The optimum surface depth is 7.5cm for straight sand with 5cm compacted, protecting your base, and the top 2.5cm for fluffing by grooming. Absolute minimal coverage of 6cm and a maximum of 12.5cm for a fibre surface to allow for compaction.
Sand should make up at least 70% of your surface; the other 30% could be any of our range of PRODUCTS.(https://www.arenasurfaces.co.nz/products)
PARTICLE SIZE & SHAPE
Sand is classified by particle size, rather than by the type of mineral it is. Some are better for drainage than others.
Sizes range from .07mm to 4.7mm. Sand is an aggregate that is smaller than gravel but larger than silt.
Particle shape is very important:
• Angular to Sub-Angular particles can be jagged and pointy, so choose a sub-angular option; these particles interlock well to provide stability.
• Rounded grain shape alone can shift underfoot, like riding on marbles; otherwise, it is good for avoiding compaction and maintaining good drainage.
• Fine particles are important for stabilizing by filling in the gaps around the other sand sizes.
Ask friends and locals about the products they have used for their arenas, and what they would do again or differently.
Find out what quarries are near you, discover what sands are available, and determine if they can provide a mixed blend. Ask if they can share any clients they have supplied to, and consider contacting them.
By choosing a quarry located closest to your site, you will save on transportation; we recommend supporting your local suppliers. Get samples of the sand, e.g. a sandwich-sized snap-lock bag, and send them to us for testing. SAND ANALYSIS (https://www.arenasurfaces.co.nz/product-page/sand-analysis)
GRADING
A. When particles are all the same size, it remains loose, shifty and feels deep.
B. Sand with little variation in grading will separate, becoming packed on the bottom and loose on top.
C. A combination range of larger, smaller, and fine particles will help keep your footing firm but not compacted.
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We recommended a sand blend like this for NZ
coarse sand (under 4.5mm) 30%
medium sand (under 2.0mm) 35%
fine sand (under .075mm) 35%
With constant use and friction (riding/grooming/elements), sand will break down into dust. To avoid this happening, consider the following suggestions.
1. Request washed sand - as this eliminates clay & silt content, which can become slippery.
2. Add a natural or synthetic additive and blend it in with your sand for longevity; it will reduce abrasion and prevent compacting and shifting underfoot.
3. Always remove manure deposited on the arena surface straight after riding, before it gets mixed in. Manure will break down into fine particles, called organic oatter, which can create a dust problem and block drainage.
4. Irrigation is a must-have for any riding surface. This is the key element people miss, but it makes all the difference. To get it right, get the advice. We offer Irrigation Consultation to provide the right advice based on your property's water supply, pump, psi, and more.
5. Add a dust suppressant such as our Hydro-Ride or Dustex products to maintain moisture retention.
TESTING
Request a Particle Distribution Sheet, which displays the curve and the results of sieving through mesh screens, as well as the grouping of sand by particle size.
Or collect samples from quarries local to you and arrange a Sand Analysis (/product-page/sand-analysis)at our in-house lab to get a picture of the sand.
Send a sample of the sand you are considering (sandwich-sized snap-lock bag) to Arena Surfaces for a report on the sand you are considering. A sieve analysis includes an examination of the grain size, shape, composition, type, and drainage qualities relative to one another, assessing standalone stability before adding any additives.
Our Equilab consultation can recommend which of the sand or footing samples provided blends best. We provide a recommendation on blends and ratios.
Get a bucket of the sample sand, create a hole with your hands and fill it with water. The water must not pool and stay; it must drain through. The speed of this process will also help you understand how this option drains as a surface.
MAINTENANCE
Maintenance is essential for maintaining a well-functioning arena, ensuring the surface remains consistent and moist. You want to recreate a surface like a beach, but since the tide doesn't come in and out in your arena, the two most essential factors in achieving this are irrigation and grooming.
GROOMING
Firstly, leaves and other organic materials will degrade your surface and shorten its longevity - so pick them up, or better still, use a leaf vac. If left in the arena, they will degrade and alter the surface composition. Remove manure deposited on the arena surface before it gets mixed in. Manure will break down into fine particles, contributing to the dust problem. Tip: Use a cable tie and an old duvet cover as a collection bag, then use a leaf vacuum to complete the job in one go. Ensure the leaves are not wet! Check that your drainage points are clear of organic material as well, so the water can flow freely.
Uneven surfaces can lead horses to modify their gaits in response to small changes, so it is always best to keep the surface uniform across the whole arena to achieve optimal riding performance. Spend time on the tracks around the outside, where the coach stands and shift your jumps/course/setup regularly.
Ideally, you should groom every other day, but if you are working with more than a couple of horses, then grooming daily or even several times a day is recommended for a public or professional arena. There are many ways to achieve the best results, with a proper arena groomer and a roller on the back, which is particularly important for fibre mix surfaces. Remember - whatever you do in one direction, always do the same in reverse. Ask us about our Redback Premium Arena Groomer(/product-page/redback-premium-arena-groomer)
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If you find an overwhelming amount of organic matter and stones, we can bring in our ARENA CLEANER (/product-page/arena-cleaner-stone-remover-sand-cleaner)once a year for a good spring clean.
IRRIGATION
Watering is essential for stability of the sand, making it firmer and helping the components to stay together. Depending on the climate, season and where you live, you can factor in how much watering you need. For outdoor arenas, rain will take care of much of the watering. Monitor your rainfall and forecast, schedule irrigation system to run for approximately 10-15 minutes just before your ride is good for dust inhibiting, however deep watering overnight the best routine.
A built-in irrigation system is ideal and much easier to manage; however, if you're on a budget, consider investing in a couple of decent hoses and lawn sprinklers (ones with even, wide, and long streams) along with a timer. Take a systematic approach and move the sprinkler every 15 minutes until you've covered the entire arena.
Irrigation timer and app
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