Evaluation of interfacial bond strength between Portland cement concrete and asphalt concrete layers using bi-material SCB test specimen

Abstract

Portland cement concrete (PCC) / asphalt concrete (AC) bonded components are seen in both conventional pavement structures as well as overlays. Due to the environmental and traffic loads, cracks occur at the interface of the PCC and AC layers and finally, may propagate through the interface or one of the layers. Therefore, the evaluation of bond strength between these layers is important. This paper investigates bond strength between asphalt concrete and Portland cement concrete using a new sandwich test specimen. The developed specimen, called Bi-material semi-circular bend (BSCB) is made of asphalt concrete and the Portland cement concrete, cracked at the interface of the materials. First, the suggested specimen is introduced and characterized using finite element simulation. Then, the specimen is employed to obtain bond strength between asphalt concrete and Portland cement concrete under mixed mode loading, and at two temperatures: -20C and 20C. The fracture toughness at different mixed mode conditions is obtained, and finally, fracture criterion for the tested bonded joints is presented.

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

“…The SCB specimen has a simple geometry, loading arrangement, the capability of applying various mode mixity by changing the pre-crack inclination angle relative to the applied load Chong & Kuruppu, 1984;Kuruppu & Chong, 2012;Rashidi Moghaddam et al, 2017). It provides a simple and effective technique for conducting mixed mode fracture tests in brittle materials (Aliha et al, 2010Elghazel et al, 2016;Ameri et al, 2012Ameri et al, , 2016Fathipour Azar et al, 2015;Kataoka et al, 2017;Wei et al, 2016Aliha & Ayatollahi, 2013Aliha & Saghafi, 2013;Aliha & Fattahi Amirdehi, 2017;Fakhri et al, 2018;Roy et al, 2017a,b;Abd-Elhady 2013;Mirsayar et al, 2017;Funatsu et al, 2014;Artamendi & Khalid, 2006). Nevertheless, the crack properties such as location, size, inclination and loading configuration have a pronounced effect on the crack extension.…”

Aging effect on combined mode fracture resistance of bitumen

“…The single edge notched bend (SENB) beam loaded by conventional three-point bend setup is a good and simple Nomenclature: a, Crack length; a/W, Crack length ratio; E, Modulus of elasticity; INBB, Inclined notched bend beam; K I , Mode I stress intensity factor; K II , Mode II stress intensity factor; K Ic , Mode I fracture toughness; K IIc , Mode II fracture toughness; K m , Effective fracture toughness; L, Length of INBB specimen; M e , Mixity parameter; P, Load; S/W, Span-to-width ratio; r,θ, Polar coordinate; r c , Critical distance; T, T-stress; T*, Normalized T-stress; W, Width of INBB; Y I , Mode I shape factor; Y II , Mode II shape factor Greek letters: ν, Poisson's ratio; β, Crack inclination angle; θ 0 , Fracture initiation direction test configuration that has been utilized and employed by some researchers such as Hesp and coworkers, [1][2][3] Bueno et al, 4 Jellema et al, 5 and Chailleux et al 6 Other test specimens like the edge or centre cracked bitumen strip subjected to tension [7][8][9][10] have also been utilized in some papers for performing and determining the fracture toughness of different bituminous materials. These results in addition to the extensive test data reported for fracture resistance of hot or warm mix asphalt mixtures [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] can provide useful information for developing a suitable framework in dealing with the cracking responses of asphalt concretes and real pavements.…”

Factors influencing stresses and movements in continuously reinforced concrete pavements – A review

“…Both cases could happen depending on the degree of bond between subbase and concrete slab. Recent studies indicate that the possibility of crack propagation through the interface increases at lower temperatures for a given concrete Mirsayar et al (2017c). Also, the fracture criteria for evaluation of the interfacial crack propagation are different for weak and strong interfaces.…”

“…However, for a bi-material system, we can rarely find a specimen in the literature satisfying all three conditions mentioned above for a proper fracture test specimen. To fill this gap, an effort has been performed recently by Mirsayar et al (2017c). They proposed a new bi-material SCB specimen covering all mixed mode conditions on the interface bond from pure shear to pure tensile conditions as shown in Fig.…”