Is EN 12620 2002 aggregates for concrete?
It covers aggregates for all concrete, including concrete in conformity with prEN 206-1 and concrete used in roads and other pavements and for use in precast concrete products.
Is EN12620?
As I.S. EN 12620:2002+A1:2008 is a harmonised standard, material produced and placed on the Irish market in accordance with this standard must be CE marked appropriately and the manufacturer must prepare and make available a Declaration of Performance for each product.
Is EN 12620 2002 A1 2008?
This standard BS EN 12620:2002+A1:2008 Aggregates for concrete is classified in these ICS categories: 91.100. 30 Concrete and concrete products.
What are aggregates concrete?
Concrete aggregates are composed of geological materials such as gravel, sand and crushed rock. The size of the particles determines whether it is a coarse aggregate (e.g. gravel) or a fine aggregate (e.g. sand). The resulting concrete can be used in its natural state or crushed, according to its use and application.
What type of stone is used under concrete?
crushed stone
The base in concrete construction is usually a form of crushed stone. Most concrete contractors want a mix of coarse and fine aggregate to create a compactable base that is going to be safe for settlement and drainage.
What is the best gravel to put under concrete?
Most people build a driveway or a patio so in that case, a good choice would be a mix of coarse and fine aggregate which will create a compactable base. Overall, a mix of crushed stone and stone dust is the best base material for any concrete flatwork. It all comes down to the ground and soil you will be working with.
What happens if you don’t put gravel under concrete?
Because concrete is a very porous material, it will absorb any moisture that it contacts. This can cause pooling. Without crushed stone, pooling water will settle under it and erode your slab.
Is sand a coarse aggregate?
Coarse aggregates are the particles that retain on 4.75 mm sieve. Sand, surki, stone screenings, burnt clays, cinders, fly ash, etc are used as fine aggregate in concrete. Dolomite aggregates, crushed gravel or stone, natural disintegration of rock are the major sources of coarse aggregate.
Can I pour concrete directly on dirt?
Long story short, yes you can pour concrete over dirt.