The Effect of Lime & Cement in Foam Bitumen Mixes

Title: The Effect of Lime & Cement in Foam Bitumen Mixes
Author(s): A. Kavussi
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: 76 - 83
Total Pages: 8
Nb references: 9
Language: English

Abstract: The application of foam bitumen to aggregates and preparation of foam bitumen mixes have
significant advantages in terms of environmental conservation. Traffic disruption and time
delays will be limited if foam bitumen is applied in the form of in-place processing. Foam
bitumen mixes that are produced in cold mix operations refer to bituminous mixes containing
aggregates and foam bitumen.The behavior of foam bitumen treated materials depends on the proportion of the mix, the
type of aggregates, bitumen and the active fillers used.
In this work, foam bitumen mixes containing cement and/or lime (as active fillers) have
been prepared using a laboratory foam-bitumen producing unit.
Mixes containing no active fillers were prepared and their optimum binder contents were
determined. The effects of adding lime, cement and lime-cement slurries were then analyzed.
Among all the parameters that affect the mix, the water content was considered to be the most
influential variable.Mechanical properties of the prepared foam-bitumen mixes were evaluated using Marshall
and Indirect Tensile Strength (ITS) tests. The ITS test was performed on samples at both dry
and soaked conditions to control their moisture susceptibility and their durability. Marshall
Quotient (the ratio of stability to flow) was also so that to control the rigidity of mixes.
It was noted that the aggregates had excessive water absorption. Upon adding a few percent
of the above active fillers, the strength values of the samples were increased appreciably. It
was also noted that adding small quantities of cement and/or lime makes the mixes quite rigid
(with cement stiffening the most). The optimum results were achieved when a combination of
lime-cement slurry was added to the mix.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.009