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Track Rock is used principally for the formation of tracks and roads. Its major use is currently in dairy tracks. Other uses include all weather airstrips, silage pits, boggy water troughs, gateways and stand off pads.
Track Rock has cementing properties under compaction, forming a solid, smooth and stable race surface. It is softer than blue metals, rotten rock and river gravels. Track Rock is soft and gentle on hooves, with no sharp edges. It contains calcium, essential for healthy hooves.
Track Rock is used principally for the formation of tracks and races. Its major use is currently in dairy tracks. Other uses include all weather airstrips, silage pits, boggy water troughs, gateways and stand-off pads.
For track establishment, the track rock is generally laid at three times the largest particle size (e.g. 65mm rock size lay at 200mm thickness) then compacted. Care should be taken at this stage not to over compact.
The long term life of any track or race is determined by the base it is laid on and the ability to drain water away from the track. Ensure your contractor lays your track on a good firm base free of wet or soft spots. Track rock should not be laid over top soil. Ensure a crowned finished surface to shed water and clear free flowing drains to take the water away from the track.
Ravensdown stands by its products and has literally thousands of meters of excellent performing farm tracks, up and down the country. However, because Ravensdown has no control over; the base the track is laid on, the application of the Track rock and the finishing of the track, Ravensdown cannot be held accountable for any issues regarding the track’s performance.
It is strongly advised that you get a reputable and if possible a recommended contractor to lay your track. Contact your local quarry for suitable contractors near you.
Does not need covering in the stock pile.
Ravensdown has no “specified standard” track rock at our quarries and as such you will find different track rock products offered as you go from site to site. Sizing can vary as can the grading but in general the following descriptions are appropriate for the site in question. If in doubt please make an appointment to visit your local quarry to inspect the Track Rock yourself, or, phone either your local Quarry manager or the Customer Centre.
Greenleaf, Dargaville, uses its pre-crushed process rock as track rock. The Greenleaf rock is a softer grey limestone and generally does not need a lot of rolling to create a smooth track. Greenleaf’s track rock comes in a 65mm all in with a good grading of smaller rock and fines to bed in the track.
Waikaretu also uses its pre-crushed process rock as track rock, but the Waikaretu rock is a lot harder, more dense and wear resistant. Waikaretu Track rock has been used extensively in the region to metal the unsealed rural roads. Waikaretu track rock is a 65mm all in product with a higher proportion in the larger rock sizing and less in the smaller size rock and fines. As this product is also the feedstock for the Waikaretu Ag Lime, it may be unavailable in the high Ag Lime demand seasons of February to April and October to November.
Supreme Lime, Te Kuiti, uses a blend of Primary Scalpings and 6mm Lime Fines to produce Track rock. The Scalpings are a by-product of the Primary crushing circuit and can contain some clay particles. The 6mm all in Fines are added to increase the smaller particle to give the product a good grading. The scalpings can give stones from 65mm and down. Scalpings can be taken on their own but can be either heavy in clay or very bony depending on where in quarry they were produced. 6mm Lime Fines will be discussed in the Dressing grade section.
Ngarua GAP products are 90mm all in down to 20mm all in and are made from the primary crushed process rock. The resource at Ngarua is some of the hardest marble limestone in New Zealand; therefore, the GAP products are unsuitable for dairy farm and cattle races due to the sharp edges. The Ngarua GAP’s are mainly used for road bases.
Whiterock is not producing track rock at present.
Geraldine uses a separate grade of Limestone more suited to track rock from its resource. The track rock is crushed in a portable crusher to a 65mm all in product which his used extensively in the Canterbury region for dairy conversion tracks and races.
Dipton uses its primary crushed process rock as track rock and is made to order. The Dipton product is a harder limestone and comes with the moisture from the pit as it is not dried like the Ag Lime. This moisture is dependent on weather conditions at the time. Dipton’s track rock comes in a 65mm all in with a good grading of smaller rock and fines to bed in the track.