City Research Online

Abstract

The use of recycled 6F5 aggregate is widely seen as a necessary option in civil engineering projects to meet carbon offset targets. This material is used for a range of applications such as load distribution platforms, capping layers, sub-bases and general backfill. It can consist of fresh aggregate or recycled components and its engineering characteristics can, therefore, vary widely. Independent of the application, it is important to characterise accurately the material properties of the aggregate in order to guarantee safe, economical solutions. The angle of friction is often the main parameter required for geotechnical design and usually obtained by direct shear tests. However, when using standard laboratory equipment there is an upper limit to the size of particle that can be tested, rendering such apparatus inappropriate for obtaining the shear parameters of 6F5 aggregate, which has a specified size fraction of 0-125 mm. The paper describes the design of a series of giant shear box tests, with a shear plane area 2.25 m², on recycled 6F5 together with details of the testing procedure and the results of these full-scale tests.

Publication Type:	Conference or Workshop Item (Paper)
Publisher Keywords:	Piling platforms, full-scale testing; carbon reduction
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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