Constituent Parts of Recycled Aggregate

Constituent parts are correctly known as the classification for the constituents of coarse recycled aggregate. This test is a coarse recycled exclusive test and determines the relevant proportions of constituent materials as outlined below:

• clay
• masonry
• concrete
• unbound aggregate
• bituminous material
• glass
• other (not classified)

This test is an important test for determining whether the recycled material is fit for use in many different applications including concrete and highways.

Constituent parts testing is carried out in conformance with BS EN 933-11:2009. The results are set by several different standards depending on the material application it is going to be used for.

Aggregate samples are reduced in accordance with British Standards. The sample is then oven dried at low temperatures due to the possibility of bituminous material being present. Once dried the sample is submerged to remove any potential floating debris. The sample is finally dried once again and then reduced and classified into the relevant sections described above. Upon finalisation, the results are checked and verified to confirm whether the sample is suitable for use.

Recycled Aggregates

Recycled aggregates are designated by the classification for the constituents of coarse recycled aggregate. The constituent parts test separates the test sample into several classifications and these classifications are known throughout the construction industry the following:

• Ra, Rb, Rc, Rg and Ru
• concrete and concrete products
• unbound and hydraulically bound aggregate
• bricks and tiles
• bituminous materials
• glass and x
• other - clays, soils, metals and woods

For recycled materials to be acceptable for use in the construction sector they must have certain proportions of the mentioned materials in the list above.

Reasons to carry out Constituent Parts?

This test is useful for any company that has a large amount of recycled material they wish to use in their applications or projects and often used as a substitute material. Amongst additional tests, this test will help you in classifying the material fit for use.