Recycling of Clay Bricks as Aggregate in Asphalt Concrete

Title: Recycling of Clay Bricks as Aggregate in Asphalt Concrete
Author(s): Khalaf
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 56 - 65
Total Pages: 10
Nb references: 24
Language: English

Abstract: The paper presents the results of a testing programme to examine the possibility of using
crushed clay bricks as aggregate in bituminous mixtures. A series of preliminary tests were
carried out on two brick aggregates crushed from unused bricks, one recycled brick aggregate
(RBA) and one version aggregate (granite) to determine and compare properties. The granite
aggregate was chosen to compare results because of past uses proved that this type of version
aggregate produces good quality asphalt concrete (AC). The aggregates selected for this
investigation were then used to make AC specimens, which were tested to determine their
physical and mechanical properties.
The results derived from this investigation showed that AC specimens prepared using
aggregates crushed from unused clay and recycled bricks outperformed specimens made with
granite aggregate. This is because of the high porosity and roughness of the surfaces of
crushed clay brick aggregates, which has the ability to absorb more bitumen and provide
better bonding in AC. On top of that using recycled brick aggregate has many environment
benefits, which make them a suitable alternative aggregate for use in road construction.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.007