Strength and permanent deformation properties of demolition wastes, glass, and plastics stabilized with foamed bitumen for pavement bases

2022 ◽  
Vol 320 ◽  
pp. 126108
Author(s):  
Farshid Maghool ◽  
Arul Arulrajah ◽  
Behnam Ghorbani ◽  
Suksun Horpibulsuk
Keyword(s):  
Permanent Deformation ◽  
Deformation Properties ◽  
Foamed Bitumen

Engineering Properties of Polymer-Modified Asphalt Mixtures

1998 ◽  
Vol 1638 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Mohammad Jamal Khattak ◽  
Gilbert Y. Baladi
Keyword(s):  
Permanent Deformation ◽  
Fatigue Cracking ◽  
Asphalt Mixtures ◽  
Engineering Properties ◽  
Polymer Modification ◽  
Polymer Systems ◽  
Modified Asphalt ◽  
Cracking Potential ◽  
Deformation Properties ◽  
Polymer Modified Asphalt

A large research program sponsored by the Michigan Department of Transportation was designed and completed to evaluate the effect of polymer modification on the various properties of asphalt mixtures. These include the micro- and macrostructural, morphological, chemical, and engineering properties. Some of the engineering properties of the styrene-butadiene-styrene and styrene-etylene-butylene-styrene polymer-modified asphalt mixtures are presented and discussed. The elastic, fatigue, tensile, and permanent deformation properties were investigated at 60, 25, and –5°C. It was found that, for some polymer systems, the fatigue life and the indirect tensile strength increased considerably at 25°C while the elastic properties at -5°C were not affected by the addition of polymer. The implication of this is that the use of some polymer systems in asphalt mixtures enhances their fatigue cracking and rutting resistance without affecting the low temperature cracking potential.

scholarly journals Laboratory performance and modelling behaviour of hot-mix asphalt with recycled crushed glass

2020 ◽  
Vol 62 (3) ◽  
Author(s):  
T B George ◽  
J K Anochie-Boateng ◽  
K J Jenkins
Keyword(s):  
Permanent Deformation ◽  
Constitutive Models ◽  
Hydrated Lime ◽  
Moisture Damage ◽  
Fine Aggregate ◽  
Moisture Susceptibility ◽  
Asphalt Mixes ◽  
Laboratory Performance ◽  
Deformation Properties ◽  
Asphalt Mix

In South Africa research is currently under way to determine the suitability of using locally available recycled crushed glass as a partial fine aggregate substitute in the production of asphalt mixes. This paper characterises the laboratory performance of a dense-graded asphalt wearing course mix consisting of 15% recycled crushed glass. The influence of selected antistripping additives on moisture susceptibility was specifically assessed as a variable in the performance evaluation of the glass-asphalt mix as follows: (a) the effect of 1% hydrated lime, (b) the effect of 0.5% liquid antistripping additive, and (c) the effect without the addition of antistripping additive. The effect of these variables on the moisture susceptibility of the glass-asphalt mix was evaluated using the tensile strength ratio parameter supported with a microscopic imaging analysis. Additionally, the stiffness and permanent deformation properties of the glass-asphalt mix that demonstrated optimum resistance to moisture damage was compared to the same mix without crushed glass. The performance properties were evaluated using the Huet-Sayegh model and a polynomial model respectively, which were used particularly to develop performance characterisation models for the glass-asphalt mix. The findings of this study revealed that an anti-stripping additive is essential to meet moisture susceptibility criteria and alleviate moisture damage in dense-graded glass-asphalt mixes. In particular, moisture susceptibility was improved using hydrated lime rather than the liquid antistripping additive. Furthermore, the selected constitutive models were able to effectively characterise the laboratory performance of both mixes, with the glass-asphalt mix demonstrating improved resistance to permanent deformation when compared with the conventional asphalt mix.

Gradation Effects on Strength and Deformation Properties of High-Quality Crushed Rock Base Materials

2021 ◽  
pp. 036119812110584
Author(s):  
Ali Fouad ◽  
Rayya Hassan ◽  
Abdulrahman Mahmood
Keyword(s):  
Resilient Modulus ◽  
Permanent Deformation ◽  
The State ◽  
Superior Performance ◽  
Crushed Rock ◽  
Heavy Duty ◽  
High Quality ◽  
Rock Types ◽  
Base Materials ◽  
Deformation Properties

The importance of specifying proper aggregate grading for achieving satisfactory performance in pavement applications has long been recognized. To improve the specifications for superior performance, there is a need to understand how differences in aggregate gradations within the acceptable limits may affect unbound aggregate base behavior. The effects of gradation on strength, modulus, and deformation characteristics of high-quality crushed rock base materials are described here. Two crushed rock types commonly used in constructing heavy-duty granular base layers in the State of Victoria, Australia, with three different gradations each were used in this study. The gradations used represent the lower, medium, and upper gradation limits for heavy-duty base materials specified by the State of Victoria’s road agency (VicRoads). Modified compaction tests were conducted first to determine the moisture-density relationship of all mixes. Further, California bearing ratio (CBR), unconfined compressive strength (UCS), and repeated load triaxial (RLT) tests were then performed to study the effects of different gradations on strength, resilient modulus (MR), and deformation resistance. Further, permanent deformation and MR results were modeled using two popular models for each to explain the effect of gradation on the mixtures’ characteristics. The results indicate that the gradation that provides the best characteristics varies depending on the type of material used. For the materials tested here, coarse and medium gradations provide the best mixture characteristics in relation to CBR, MR, and permanent deformation. Fine gradation mixtures of these materials have lower values of these measures but are still considered acceptable considering relevant specification for the intended application.

scholarly journals Resistance to Permanent Deformation of Asphalt Concrete with F-T Wax Modified Foamed Bitumen

2015 ◽  
Vol 108 ◽  
pp. 459-466 ◽  
Author(s):  
Justyna Mrugała ◽  
Mateusz M. Iwański
Keyword(s):  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Foamed Bitumen
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