What is a Type 1 Sub Base?
Type 1 Sub Base is generally a 40mm graded to dust material that is laid and compacted to form a level stable construction layer as a platform for asphalt or concrete. It is typically used in the construction of highways, car parks, footways and hard standing areas.
Is sub-base the same as Type 1?
Type 1 material is graded from 40mm down to dust and is used for a regulating course under highways, sometimes referred to as sub-base. Crusher Run is normally used as a sub-base for domestic applications, as when compacted it makes an extremely solid and level base for patios, garden buildings and flooring.
What is a Type 1 stone base?
MOT Type 1 is a crushed material, 0-40mm in size and usually made from granite or limestone. This makes it an extremely strong and hardwearing material once it has been compacted. Due to its strength, MOT Type 1 is usually used as a sub-base creating a stable surface for roads and pathways.
What is the difference between granular B type 1 and 2?
Granular B Type I does not require crushing. Granular B Type II is 100% crushed and hence may only be obtained from quarried rock, blast furnace slag, or nickel slag. Maximum size of Granular B Type II may be 150 106, or 75 mm.
Is Type 1 good for drainage?
MOT Type 1 is permeable so assists with drainage and as it includes the larger stones it won’t easily wash away.
What is Type 1 aggregate used for?
Ballast, gravel and hardcore MOT Type 1 (hardcore) is crushed carboniferous limestone, used to create a hardcore base under patios, paving, driveways and artificial grass. It can also be used as a filling product.
What is granular sub-base?
Granular Sub Base(GSB) is natural or designed construction material, used for road construction as a sub-base layer. Granular Sub Base is a layer in road foundation just above the compacted sub-grade layer. Secondly, it works like a drainage layer where water can pass without damaging other road layers.
How do you compact a sub-base without a compactor?
A traditional garden roller is great for compacting a sub-base. Garden rollers are generally filled with sand or water to give them weight (100kg is suggested) and then rolled backwards and forwards across the sub-base material to compact it. This method should result in a very smooth and even surface.
What is Type 1 stone used for?
What is the difference between granular A and granular B?
A washed product. Granular gravel is a manufactured mixture of sand and crushed rock 1” in diameter and smaller – used for the surface of roadways, parking areas and driveways. Granular B gravel is a blend of sand and stone. The stone size varies from pit to pit.
What is Type 2 granular material?
Granular B Type II is 100% crushed stone and may only be obtained from quarried rock. 100% passes through the 150 mm (6 inch) sieve and may include any range of sizes between 6″ and under. Used as a base material. Typically Granite or Limestone.
What is the best sub-base for drainage?
Use Granite or Limestone Chippings if You Have Pets or Drainage Issues. Due to its inherent drainage capabilities, if you have pets or existing drainage issues in your garden, we would highly recommend that you use granite or limestone chippings as a sub-base material.
