Comparison of Wilhelmy plate and Sessile drop methods to rank moisture damage susceptibility of asphalt – Aggregates combinations

Habal, Ayyanna; Singh, Dharamveer

doi:10.1016/j.conbuildmat.2016.03.060

Cited by 46 publications

(7 citation statements)

References 11 publications

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“…The contact angle of the probe liquid with the surface of the asphalt binder can be determined from simple force equilibrium conditions which is the difference between weight of a plate measured in air and partially submerged in a probe liquid was expressed in terms of liquid surface energy, buoyancy of the liquid, geometry of the plate and contact angle. The surface energy was calculated using the mathematical models presented by Little and Bhasin, [9] and Habal and Singh, [4]. Table 4 exhibit the influence of aging process and implementation of recycling agents on rheological properties of asphalt cement.…”

Section: Determination Of Surface Free Energy Of Recycled Asphalt Cemmentioning

confidence: 99%

“…The impact of aging time on physical and rheological properties of asphalt cement such as penetration, softening point, ductility, stiffness modulus, surface free energy, penetration index and bending beam rheometer BBR before and after thin film oven test with various aging periods have been modeled. Two techniques namely Wilhelmy plate (WP) and Sessile drop (SD) methods to rank moisture damage susceptibility of twelve different asphalt-aggregate combinations have been compared by Habal and Singh, [4]. Three asphalt binders: unmodified, polymer modified, and crumb rubber modified binders, and four aggregates (basalt, limestone, granite, and sandstone) were selected in their study.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Recycling Agent on Surface Free Energy of Asphalt Cement

Sarsam¹

2019

AJTTE

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Reliable surface free energy characterization is required in order to implement the suitable recycling agent into aged asphalt. One proven method to estimate asphalt surface free energy is to calculate it using contact angles measured with various liquids. The efficiency of recycling agent in terms of its impact on rheology and surface free energy of asphalt cement is vital in the decision of recycling aged asphalt concrete. In this investigation, asphalt cement of penetration grade 40-50 was subjected to aging using the thin film oven test. The aged and the control asphalt cement samples have been digested with various percentages of two type of polymer recycling agents (Polyethylene and crumb rubber). Recycled and control asphalt cement specimens were subjected to physical and rheological properties determination, while the surface free energy was determined using Wilhelmy plate and Sessile drop methods. It was observed that the surface free energy decreases after aging, while it increases after digestion with polymers. Digestion of aged asphalt cement with polyethylene was able to retain the original surface free energy of asphalt cement before aging, while a higher percentage of 1.5 polyethylene has improved the surface free energy beyond the requirements. Digestion of aged asphalt cement with crumb rubber was able to increase the surface free energy of asphalt cement by one-fold of that before aging when Wilhelmy plate method was implemented, while a higher percentage of 1.0 of crumb rubber has improved the surface free energy beyond the requirements.

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Section: Determination Of Surface Free Energy Of Recycled Asphalt Cemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Recycling Agent on Surface Free Energy of Asphalt Cement

Sarsam¹

2019

AJTTE

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“…The separation area of asphalt and aggregate is defined as adhesion failure area S a , and asphalt's own separation area is defined as the cohesion failure area S c . The relationship between tensile failure load F and the overall tensile strength R t could be expressed by formula (7). While relationship among tensile failure load F, strength of adhesion R a , failure area of adhesion S a , strength of cohesion R c and failure area of cohesion S c could be expressed by formula (8)…”

Section: The Principle Of the Testmentioning

confidence: 99%

“…Over the years, many elaborate studies have been performed to study this topic. [2][3][4][5][6][7][8] Specifically, academician Sha 9 systematically studied the reasons of the early stage moisture damages in asphalt pavement and proposed the corresponding solution. Some research had calculated and analysed moisture damage problems of asphalt pavement by creating numerical simulation model.…”

Section: Introductionmentioning

confidence: 99%

Analysis of effective pore pressure in asphalt pavement based on computational fluid dynamics calculation

Guo

Sun

Dai

2017

Advances in Mechanical Engineering

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A micromechanical model was established based on the fluid dynamics theory. This model could be used to calculate several kinds of data when the asphalt pavement under the influence of traffic loading is in water-saturated condition. The results showed that the maximum pressure inside the effective pore was located at the junction between exit slits and the pore wall. There was a positive correlation between the pressure and the vehicle speed. Therefore, the repeated traffic loading could cause emulsification, shift and even peeling of the asphalt membrane. Moreover, the bigger size of the exit slit is, the higher velocity of the fluid has. The high velocity flow keeps scouring both the exit slit and the lower boundary of pore wall. It will cause a bigger slit. Pressure distribution inside the effective pore is related to the number of the exit slit which connect with the pore. More exit slits means bigger pressure inside the effective pore. In addition, if asphalt membranes at exit slits have micro-cracking, the cumulative damage could appear easily and asphalt membranes could be peeled easily. Finally, a test was conducted so as to obtain the bonding strength and adhesion strength between asphalt and aggregate. Then, we can get accurate damage form and position during the scour process by comparing the numerical simulation results with experiment results.

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“…The contact angles of water and diiodomethane on the epoxy matrix were measured using the sessile drop method [33]. W ad can be estimated by applying Fowke's theory [34] and the Young-Dupré equation [35] according to the geometric mean method, as given in the following eq (4): (4) where g s is the surface energetic of the CFs listed in Table 1, g L is the surface energetic of the epoxy matrix used and = 37.5 mN/m and = 5.8 mN/m [36].…”

Section: Surface Properties Of Cfsmentioning

confidence: 99%

Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method

Kim¹,

An²,

Bang³

et al. 2016

Carbon letters

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In this work, we studied the effects of electrochemical oxidation treatments of carbon fibers (CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The mechanical interfacial shear strength of the CFs/ epoxy matrix composites was investigated by using a micro-bond method. From the results, electrochemical oxidation treatment introduced oxygen functional groups and increased roughness on the fiber surface. The mechanical interfacial adhesion strength also showed higher values than that of an untreated CF-reinforced composite.

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Comparison of Wilhelmy plate and Sessile drop methods to rank moisture damage susceptibility of asphalt – Aggregates combinations

Cited by 46 publications

References 11 publications

Influence of Recycling Agent on Surface Free Energy of Asphalt Cement

Influence of Recycling Agent on Surface Free Energy of Asphalt Cement

Analysis of effective pore pressure in asphalt pavement based on computational fluid dynamics calculation

Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method

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