What is a Type 1 sub-base?

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.

What is mot type 1x?

Other Name(s): DOT Type 3, MOT Type 1 X. Consists of: Pure crushed granite, basalt or limestone. This product has been produced to create a reduced fines aggregate but NOT zero fines.

What is the difference between Type 1 and Type 3 mot?

Type 3 is a sub-base similar to MOT Type 1 but with reduced fines to allow water to free drain as a permeable sub base. For material to be called Type 3, it must conform to the Ministry of Transport Specification Clause SHW 805. It was previously known as DOT Type 3 (Department of Transport Type 3).

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.

Should you wet type 1 before compacting?

Yes it will be fine, compact it in 50mm layers wetting it before compacting, it will goes as hard as concrete.

Is MOT Type 1 the same as 803?

What is Type 1 SHW clause 803 (Formerly known as Primary MOT Type 1)? Type 1 SHW clause 803 (formerly MOT Type 1) is crushed carboniferous limestone or granite, used to create a sub base under patios, paving, driveways and artificial grass. It can be used for highways agency and section 278 works.

What does MOT Type 1 mean?

MOT Type 1 is a crushed aggregate material used to provide a stable sub-base for road surfaces and pathways. Both primary and recycled material can be used to produce a Type 1 sub-base.

How deep should type 1 be?

It is usual to lay MOT Type 1 at a compacted depth of 100mm for most patio projects and at a compacted depth of 150mm for most domestic driveways. Compaction should be achieved using a wacka plate. MOT Type 1 is used to stabilise the ground prior to laying paving and also allows for drainage.

What is Type 1 stone used for?

Mot Type 1 limestone is sized from 40mm down to dust and is mainly used as a bulk fill, a levelling material and as a sub-base for paths, ponds, drives, sheds, patios and construction jobs.

Can you mix cement with Type 1?

Type 1 is a grading not a specific material. It may be limestone, granite, crushed concrete etc dependent on where you are. As Kiab says its a bit rough for concrete but you’re not going to expose it and you could always mix a bit of sand cement to top up your bed so you can level your blocks easily. Go for it.

What is a type 1 sub-base?

A sub-base works by distributing a point load over a larger area. The interlock between adjacent particles of the sub-base material greatly improves the ability of the ground to carry heavier loads. A Type 1 sub-base material would normally be unsuitable due to the high fines content leading to minimal porosity and permeability.

What is an MOT type 1 sub base?

Application: MOT Type 1 is a must for any highly trafficked area and is most commonly used as a sub-base for highways, car parks, footpaths, driveways, hard standings and building bases. Any application where a firm sub-base is required needs type 1. It’s also used to get a firm flat surface before laying concrete over the top.

What are the different types of sub-base?

Typical Sub-base Designs. 1 Sub-base Light Duty. (light, foot traffic only – paths and patios) 75mm compacted thickness of DTp1 or of 50mm crusher run, compacted with a vibrating 2 Sub-base Light-Medium Duty. 3 Sub-base Medium Duty. 4 Sub-base Medium-Heavy Duty.

What is SHW Type 3 sub base?

Type 3 Open Graded SHW Clause 805 Sub Base is a pure crushed stone, ranging in size from 40mm down to dust, but with a reduced (not zero) fines content. Available both as a granite or limestone, Type 3 Sub Base is widely used as a sub-base material for projects where a lower fine content is required for improved drainage.