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Flexural fatigue strength of demolition aggregates stabilized with alkali-activated calcium carbide residue

journal contribution
posted on 05.09.2019, 00:00 by Alireza Mohammadinia, A Arulrajah, I Phummiphan, S Horpibulsuk, Mehdi Mirzababaei
Replacing the base and subbase layers in flexible pavements and sub-ballast layer in railway tracks with recycled materials has attracted significant attention from industry and researchers alike. The semi-rigid stabilized layers in the flexible pavement structure and railway tracks sustain high flexural and tension stresses which reduces the serviceability life of the superstructure. The flexural and compressional modulus of the stabilized materials under repeated loads and at at-rest k 0 condition is highly dependent on the specifications of the binder. Industrial by-products including calcium carbide residue (CCR), Fly Ash (FA) and Slag (S) were utilized to improve the compressional resilient modulus, flexural strength, durability and fatigue life of recycled aggregates. The variation of ductility in the blend with different precursors indicated that the service life of the stabilized layers not only depended on the strength but was also controlled by the deterioration rate of the flexural modulus and stiffness of the sample. The ductility of binder with aluminosilicate gels fabric can potentially absorb the stresses of the cyclic loading and postpones development of tension cracks.

History

Volume

199

Start Page

115

End Page

123

Number of Pages

9

ISSN

0950-0618

Publisher

Elsevier, Netherlands

Peer Reviewed

Yes

Open Access

No

Acceptance Date

05/12/2018

External Author Affiliations

Swinburne University of Technology; Suranaree University of Technology, Thailand

Era Eligible

Yes

Journal

Construction and Building Materials

Exports

CQUniversity

Exports