International Journal of Pavements 

About: International Journal of Pavements is an academic journal. The journal publishes majorly in the area(s): Asphalt & Aggregate (composite). It has an ISSN identifier of 1676-2797. Over the lifetime, 92 publications have been published receiving 378 citations.

An investigation of factors influencing permeability of Superpave mixes

Abstract: The paper reports on a study to evaluate factors affecting permeability by using a laboratory permeability device. The results indicate that: in-place void content is the most significant factor impacting permeability of superpave pavements; coarse-graded mixes are more permeable than fine graded mixes at given air void contents; and air voids determined using Corelok method of measuring the bulk specific gravity of field compacted HMA specimens provides a better estimation of internal air voids than does the more traditional AASHTO T166 method. Other factors identified as having a significant impact on permeability were coarse aggregate ratio, percent passing 12.5 mm sieve, percent passing 1.18 mm sieve. Permeability decreases as lift thickness increases.

Rheology of Fractionated Cornstover Bio-oil as a Pavement Material

Abstract: Most bituminous binders that are used for pavement materials are derived from fossil fuels. Recently, different vegetable oils have been investigated to study their applicability to be used as bio-binders, which can be used in three different ways: a direct alternative binder (100% replacement), a bitumen extender (25% to 75% bitumen replacement), or a bitumen modifier (<10% bitumen replacement). In this paper, the rheological properties of bio-oils derived from cornstover (non-food source) have been investigated to determine the applicability of developing bio-binders as an alternative to asphalt derived from crude petroleum. The rheological properties included the shear and temperature susceptibilities and the aging index. The results show that the temperature is the main contributor to change the viscosity of the unmodified and modified cornstover bio-oil. As an overall conclusion, the rheological properties of cornstover bio-oils are similar and comparable to bitumen binders and represent a renewable alternative to petroleum derived asphalt binders.

Stabilization of Silty Sand Using Polymer Emulsions

Abstract: Laboratory evaluations were performed on several commercially available polymer emulsions to provide comparisons of these materials for stabilization of silty sand. Portland cement stabilized specimens were prepared and tested to provide a conventional stabilizer control. Results indicate that some polymer emulsions achieve compressive and retained wet strengths on the same order as the cement stabilized soils at lower additive levels. Toughness values reveal that some soil polymers exhibit significantly higher values for both the wet and dry testing condition than soil cements, indicating significantly higher strains were attained at yield (defined as the point of maximum applied stress. No significant differences in the retained wet strength and toughness were found between the polymers and cement soil additives. Cure time behavior of several soil polymers indicates that these systems may not have reached ultimate physical properties after 28 day cure times.

Effectiveness of antistrip additives for bituminous mixtures

Abstract: Moisture sensitivity of hot mixed asphalt (HMA) mixtures has been identified as the cause of many distresses of flexible pavements around the world. The research study documented in this paper involved the construction of six test sections at two locations in South Dakota, USA, to evaluate the effectiveness of antistrip additives. The test sections included: a control, hydrated lime, a commercial chemical product (UP5000), and liquid antistrip additives. The mixtures were sampled during construction and their field performance was monitored for two years after construction. The moisture sensitivity of the various mixtures was evaluated in the laboratory using resilient modulus, tensile strength, resistance to permanent deformation, and resistance to thermal cracking. The analysis of the laboratory data indicated that the addition of hydrated lime has the best potential of reducing the moisture sensitivity of South Dakota's HMA mixtures. The two years in-service did not yet show any significant variation in the performance of the various treatments. Based on the data generated from this research, it has been recommended that the process of adding lime to the wet aggregate should be used to minimize moisture damage of HMA mixtures in South Dakota.

Micro-deval test for evaluating properties of roadway aggregate

Abstract: The objective of this study was to test known aggregate sources using the Micro-Deval apparatus and compare the test results to Los Angeles (LA) abrasion loss, freeze-thaw soundness, absorption, aggregate durability index, and bulk specific gravity of aggregate. Another objective was to rank the aggregates based on Miro-Deval loss and in-service performance. The study tested 18 different Oklahoma sources of aggregate for which roadway performance was known. The abrasion test results for the 18 aggregates tested are provided.