Mechanistic Comparison of Cement- and Bituminous-Stabilized Granular Base Systems

Berthelot, C; Marjerison, B; Houston, Gary; McCaig, Jody D; Warrener, Stu; Gorlick, Rock

doi:10.3141/2026-09

Cited by 20 publications

(21 citation statements)

References 2 publications

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“…It was found that the FASB modulus was temperature sensitive and was also governed more by the confining pressure than the deviatoric stress. Berthelot et al (2001) used triaxial dynamic modulus tests to evaluate different alternative stabilisation methods for a marginal recycled granular base with a high percentage of plastic clay fines. The stabilisation methods included asphalt emulsions and foamed asphalt with and without Portland cement.…”

Section: Stiffnessmentioning

confidence: 99%

Mechanistic structural properties of foamed asphalt stabilised base materials

Khosravifar

Schwartz

Goulias

2014

International Journal of Pavement Engineering

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Foamed asphalt stabilised base (FASB) material is a partially bound material consisting of four phases of aggregate skeleton, air voids, foamed binder and water. Its mechanical properties and behaviour are greatly influenced by field placement and curing conditions. Given appropriate design and application, the structural capacity of FASB lies somewhere between granular aggregate base (GAB) and hot mix asphalt. Therefore, when FASB is used in the place of GAB, the required thickness of the pavement section can be reduced, resulting in cost savings in addition to recycling benefits. The objective of this study was to investigate and explain the distinct mechanical behaviour of this material and address the most important performance-related parameters of FASB -stiffness and permanent deformation resistance. Triaxial dynamic modulus (jE*j) and repeated load permanent deformation (RLPD) tests were performed on field-cured FASB cores. The influence of confining stress on dynamic modulus was found minor as compared with that of loading rate and temperature. At a 258C temperature and a 10 Hz loading rate typical for base layer conditions in high-volume highway pavements, the mean value of dynamic modulus of a new FASB was found to be 4310 MPa, much greater than what would be expected from conventional GAB. RLPD test results demonstrated satisfactory resistance to rutting. The in situ long-term stiffness of FASB measured using a Dynatest falling weight deflectometer was of an order of magnitude greater than the stiffness of GAB. A structural layer coefficient of 0.142 cm 21 (0.36 in. 21 ) was recommended for this material for use in the empirical 1993 American Association of State Highway and Transportation Officials design procedure.

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Section: Stiffnessmentioning

confidence: 99%

Mechanistic structural properties of foamed asphalt stabilised base materials

Khosravifar

Schwartz

Goulias

2014

International Journal of Pavement Engineering

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“…falls short of design expectations (3). Modern field conditions are becoming increasingly challenging for designing road structures and maintaining road networks.…”

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confidence: 99%

Modeling in Situ Performance of Cement-Stabilized Granular Base Layers of Urban Roads

Soares¹,

Haichert²,

Podborochynski³

et al. 2013

Transportation Research Record

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This study used a three-dimensional nonlinear orthotropic computational road model to measure the performance of reclaimed and recycled portland cement concrete (PCC) aggregates and reclaimed asphalt pavement (RAP) aggregates stabilized with cement as a base layer in a typical local road structure in the city of Saskatoon, Saskatchewan, Canada. The pavement structure was composed of 45-mm hot-mix asphalt concrete on a 225-mm granular base built directly over an in situ subgrade. The cross section was analyzed with a conventional granular base layer as a baseline and PCC and RAP base layers with 2% cement stabilization. The cement-stabilized PCC and RAP base layers showed improved shear strain and horizontal strain behavior when compared with the conventional granular base layer (which was not cement stabilized). This improvement con-firmed that cement stabilization of reclaimed PCC and RAP materials provided an enhanced primary response. This study demonstrated that typical thin Saskatoon pavement structures were highly dependent on the constitutive properties of base layer material. Stabilizing the PCC and RAP base layers with 2% cement reduced the maximum shear strains at the edge of the pavement structure by 12% and 25%, respectively, compared with the unstabilized conventional granular base layer. It was believed that the increased fracture and cohesion of the residual cementitious materials inherent to recycled granular base, as well as the cementitious binder added, improved structural performance.

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“…Marjerison studied the mechanistic comparison of cement-and bituminous-stabilized granular base systems [17]. Schwartz and Khosravifar studied the design and evaluation of foamed asphalt base materials [18].…”

Section: Introductionmentioning

confidence: 99%

Design and Performance of Anticracking Asphalt-Treated Base

Tian

Han²,

Zhang

et al. 2017

Advances in Materials Science and Engineering

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To enhance the crack resistance of asphalt-treated base (ATB), a type of gapped and semiopened gradation ATB mixture, GSOG, was designed. Its design method was proposed based on the volume design method and performance tests. Firstly, several gradations were designed preliminarily in which middle particle sizes of coarse aggregates were partially or completely gapped according to the gradation specification. Secondly, their voids in coarse aggregates (VCA) were determined through dry rod compaction test on coarse aggregates, and then their theoretical voids were calculated. Gradations whose theoretical voids met the requirements were selected to fabricate specimens with Superpave Gyratory Compactor, and their voids were determined using vacuum sealing method and submerged weight in water method. Finally, gradations whose voids meet requirements were selected to fabricate different types of specimens for various performance tests, and the optimal gradation can be selected comprehensively considering their performances, especially focusing on their crack resistance. According to this gradation design method, the gradation of GSOG-25 was designed, and its performances, including high-temperature stability, water stability, fatigue, and antireflection crack resistance, were measured and compared to ordinary ATB-25. The results demonstrate that the performance of GSOG-25 is much better than that of ordinary ATB-25, especially in anticracking capacity.

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Mechanistic Comparison of Cement- and Bituminous-Stabilized Granular Base Systems

Cited by 20 publications

References 2 publications

Mechanistic structural properties of foamed asphalt stabilised base materials

Mechanistic structural properties of foamed asphalt stabilised base materials

Modeling in Situ Performance of Cement-Stabilized Granular Base Layers of Urban Roads

Design and Performance of Anticracking Asphalt-Treated Base

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