What is a capping layer?

What is a capping layer?

A capping layer helps to create a construction platform where the subgrade is not viable. It is granular product from a crushed rock quarry, and often incorporates recycled materials. Capping layer materials help to reduce costs and to protect the subgrade from rainfall and weathering.

What materials do capping layers use?

crushed rock
The materials most commonly used in a capping layer are crushed rock, hardcore or a hydraulically bound mixture. Because the grading of the material in a capping layer doesn’t need to be particularly tightly controlled, the material can usually be sourced locally.

What is 6F1 aggregate?

6F1/6F4 (formerly 6F1 Recycled) is a finer capping layer that is used in the same way as 6F5 but with a finer grading. 6F2/6F5 Recycled is a coarse-graded material ranging from 125mm to dust. 6F2/6F5 is typically used for piling mats, haul roads and temporary hard-standings, such as car parks.

What is 6F2 capping?

Consists of: An aggregate composed of crushed concrete, brick and mortar produced as a by-product of demolition projects known in the trade as 6F2 Recycled Capping. The coarse nature of 6F2 Capping makes it a very good all in one product which when compacted forms a hard wearing surface. …

What is 6F5 used for?

6F5 Recycled Crushed Concrete (75mm to dust) Uses: Capping layer for larger road and highway construction, civil engineering, driveways, landscaping, pathways and as a general fill material.

What is the CBR value for subgrade?

CBR value is taken at 2.5mm & 5 mm penitration. in subgrade material CBR value should be nearly 15-19% .

What is improved subgrade?

Normally, subgrade material is improved by installing geotextiles. They are used to prevent mixing of soft or inadequate soil that might affect the structural capacity of the subgrade.

Is 6F2 a waste?

We are regularly asked by our customers to remove or relocate 6F2 from their sites which has been used for temporary works. The material is then technically deemed a waste product.

What is the difference between 6F5 and 6F2?

Recycled Aggregates 6F5 is an unbound, coarse recycled aggregate made from crushed hardcore and concrete and graded from 75mm down to dust. 6F2 can be used as bulk fill to build up levels, as a temporary hard standing, for firming up soft or wet ground or for use as a layer below Type 1 crushed/primary.

What is 6F5 material?

6F5 is an unbound, coarse recycled aggregate made from crushed hardcore and concrete and graded from 75mm down to dust. 6F2 can be used as bulk fill to build up levels, as a temporary hard standing, for firming up soft or wet ground or for use as a layer below Type 1 crushed/primary.

Why is it called 6F5?

The term 6F5 Capping is generally used to describe a product that is similar in size and grading to recycled 6F2 Crusher Run but made from quarried stone instead.

What is the difference between 6f1/6f4 and 6F5 capping?

These materials typically contain crushed concrete, recycled asphalt and possibly crushed brick. 6F1/6F4 (formerly 6F1 Recycled) is a finer capping layer that is used in the same way as 6F5 but with a finer grading. 6F4 is generally 31.5mm to dust.

What is coarse capping layer 6F2?

Coarse Capping Layer. Material size ranges from 100mm down to dust. 6F2 is classified as materials sourced, produced and used on site. Where material is imported onto site, it should be classified as 6F5.

What is 6f3 capping made of?

6F3 capping ranges from 100mm down to dust, and contains no less than 50% by mass of recycled bituminous planings and gragnulated asphalt, but excluding materials contaminated with tar and tar-bitumen binders. Typically used as a drainage material and for the bedding of pipes. We are able to supply dry-screened or washed versions of this material.

What is 6f1 material?

6F1 is classified as materials sourced, produced and used on site. Where material is imported onto site, it should be classified as 6F4. If you require 6F1, please enquire about our mobile crushing/screening services.

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