Our Aggretages for London
Ballast refers to a mixture of sand and gravel that is used to make concrete. Generally, the size of the grains/stones vary from 0.1mm upwards to 20mm. It is nomally produced using a mixture of sharp sand and 4-20mm pea shingle.
Concrete is a mixture of sand, ballast and cement that sets hard within a few hours of being mixed with water. The proportions of ballast, cement and water are varied to give concretes of different strengths and workability. If less water is used in the initial mix, the stronger the end-product of concrete will be when set.
Ballast is suitable for various projects and this includes: mixing concrete for foundations and footings, making a concrete slab for your conservatory/shed/garden or extension. This aggregate can also be used for foundations for garden walls, concreting in fence posts and making paths. As a general guide for concrete mix use 1 part cement to 6 parts ballast. Where everything is dry, a water to cement ratio of 0.55 should be used. When your concrete is mixed and ready to use it should be able to support itself, almost fully, in a heap on a shovel.
Crushed concrete is an aggregate composed of clean crushed concrete and brick. The size of this aggregate varies from 75mm down to 40mm.
Sharp sand is typically made from ground rocks and is sometimes referred to as builders sand as its ideal for laying blocks, paving and patios.
Ballast refers to a mixture of sand and gravel that is used to make concrete. Generally, the size of the grains/stones vary from 0.1mm upwards to 20mm.
There are two different types of gravel which are 10mm and 20mm. 10mm gravel, also known as ‘pea gravel’ is primarily used for decorative purposes and drainage.
Topsoil is defined by the top 2-7 inches of soil that has the greatest organic content. Organic matter is what is left after plant roots and leaves.
Building Sand is a finer grade than sharp sand with smaller particles. It’s often mixed with water and cement to make mortar for laying bricks, patio slabs and blocks.
MOT Type 1 is a sub base that is formed using recycled crushed concrete and consists of rubble of varying size. It compacts well to form a solid base which makes it an ideal sub-base.
This sand is used to fill the joints of block paving and paving slabs. By filling the joints with paving sand you keep the structure of the paving rigid and strong.