What is Mot type 1 crushed stone? Why is crushed stone used in landscaping, driveway and patio construction?
Crushed stone when compacted gives a solid foundation for you to lay your paving upon.
Crushed stone is sold loose as hardcore aggregate is classed as MOT type 1. Which means that it is approved for use by the Ministry of Transport for the construction of public highway roads and pavements.
If MOT type 1 stone aggregate is good enough for public road construction, you can be sure it’s good enough for constructing a patio or driveway around your home.
This type of base stone is the most widely used crushed stone in construction and civil engineering industries across the UK.
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What does Mot type 1 crushed stone contain?
MOT type 1 crushed stone will contain varying sizes of stone aggregates. They range from 20-40mm sized stones down to small 6mm-dust sized particles and any size in between. This allows for the stone to be compacted with a heavy-duty vibrating roller or plate compactor. Once compacted the surface becomes very hard, dense and tightly packed surface of stone.
Once laid at the correct depth & compacted sufficiently the base-stone should not sink or move. It can support any type of surface that is laid on top. This could include tarmac or asphalt, block paving, paving slabs or concrete. The laying of a ground stabilization sheet under any stone base is highly recommended. This gives added strength to the stone base and stops weeds.
How much stone will you need?
1 tonne or 1000kg of MOT type 1 stone aggregate will cover approximately 10 square meters to a depth of 2 inch (50mm) after stone has been compacted using a vibrating roller or compactor plate.
Nearly all builders yards and large DIY centre’s will sell crushed stone in bulk bags. These are for constructing driveways and patios. But in almost all instances, builders yards and DIY centres such as Jewson, Travis Perkins, Wickes and B and Q sell jumbo bags that only contain 850kg crushed stone (I’m still not sure why). So a bulk bag containing only 850kg you get 8.5 square meters per bulk bag of stone when compacted at a depth of 2 inch, 50mm.
Alternatives to stone aggregates available to buy that are similar to MOT type 1
Many different kinds of stone can be used to make MOT type 1. Limestone and granite bieng the most popular types of naturally occurring stone. You can buy recycled aggregates for making a sub-base. They use crushed concrete, stone, bricks and other hard materials to make hardcore base for use in sub-base construction projects. Once these materials have been crushed up and graded, they can now be classified as being mot aggregates.
Other kinds of crushed stone that are ideal for the construction of stone driveways and patios around the home include sandstone, Flint, shingles, ballast and gravels.
We have a full range of clean sized aggregates for sale including ballast stone. These include single sized stone for permeable driveways and patios that is designed to allow the water to pass through the stone for drainage.