Open-graded Friction Course Mixes Research Articles

Interface contact properties in asphalt pavement using 3D laser scanning technology

Existing research on pavement interlayer bonding has mainly focused on bonding materials and external factors, neglecting the upper and lower interlayer surface characteristics. This study aims to analyze the contact conditions between these surfaces, developing a numerical model to reveal their properties. Five double-layered asphalt systems, including dense-graded asphalt concrete (AC), open-graded friction course (OGFC), and stone mastic asphalt (SMA) mixes, were examined using a nondestructive interlayer separation method and 3D laser scanning. Three indices were proposed to assess interlayer surface characteristics in both 2D and 3D domains. Shear strength tests at room temperature were also conducted, revealing that AC-only systems had lower surface mismatch at the layer interface compared to SMA or OGFC mixes. The study concludes that surface mismatch decreases with greater differences in aggregate coarseness, and systems with significant mismatch gaps have lower shear strength. These findings provide valuable insights for designing durable pavement structures.

Laboratory Investigation of Open Graded Friction Courses with Different Binder Grades and Aggregate Gradations

This study investigates the effectiveness of the volumetric mix design procedure used by the New Mexico Department of Transportation based only on the tensile strength ratio (TSR) test for designing open graded friction course (OGFC) materials. It also evaluates the effects of different binders (or binder grades) and aggregate gradations on the performance of OGFC materials. Nine OGFC mixes were produced using three different binders (PG 64-28+, PG 70-28+, and PG 76-22+) and three different aggregate gradations (two of 9.5 mm nominal maximum aggregate size [NMAS] and one of 12.5 mm NMAS). Next, a thorough laboratory investigation was conducted to evaluate their various performances. This study found that the traditional volumetric mix design based solely on the TSR test cannot ensure adequate durability performance. The PG 64-28+ OGFCs, for example, met all the volumetric and TSR requirements during mix design but performed poorly in all performance tests. This suggests that additional performance testing for OGFCs is required to ensure adequate longevity. Cantabro abrasion and semi-circular bending tests are found to be useful in characterizing the durability and moisture conditioning, and the fracture performances of an OGFC, respectively. Furthermore, a new test is proposed for evaluating the durability performance of an OGFC in wet conditions using the Micro-Deval device. According to this study, OGFC's durability and fracture performance improves as the grade of binder used increases. The OGFCs prepared with aggregates of smaller NMAS outperformed the OGFCs prepared with larger NMAS aggregate in both durability and fracture tests despite having similar asphalt contents.

Sustainable Open-Graded Friction Course asphalt mixes with steel slag aggregates

A permeable mixture called Open-Graded Friction Course (OGFC) is used to lessen the effects of climate change, especially during periods of heavy rain. It is made up of open gradation, mostly coarse aggregates, and fewer fines. The advantages of an OGFC mixture include the removal of surface water from the pavement, noise absorption, increased frictional resistance and more. Steel slag is a waste product left over from the Iron and Steel industry that can be utilized as aggregates in OGFC mixes. The primary goal of this work is to assess the usage of steel slag aggregates in place of conventional aggregates to produce the OGFC mix for getting improved mixture properties. Five percentage substitutions were employed to examine the design and quality of the OGFC mix, namely, 0% (control mix), 25, 50, 75, and 100% of steel slag aggregates in place of conventional aggregates. Tests for air voids, binder draindown, unaged and aged Cantabro abrasion loss, and Indirect Tensile Strength (ITS) test were conducted to evaluate the performance of OGFC mixes containing different percentages of steel slag. The test results show that the performance of the mix was improved by the addition of various percentages of steel slag. The results of the physical properties tests on steel aggregates were better than that of conventional aggregates. The mix with steel slag aggregates exhibits a slight improvement in the drainage property when compared to the conventional aggregate mix, according to the test results of the draindown test. When compared to the conventional mix, the mix with 100% replacement at 5.75% bitumen content produced better raveling resistance, and the mix with 50% steel slag replacement indicated improved resistance to moisture susceptibility with good Tensile Strength Ratio. The test results showed 100% replacement mix performed better in terms of abrasion loss, binder draindown, and air voids content, while a 50% replacement mix performed better in terms of moisture susceptibility along with other parameters. Overall, it can be concluded that using steel slag aggregates in the OGFC mix can be advantageous and increase sustainability with utilization of steel slag as an industrial marginal material in construction of pavements.

Effects of Asphalt Binder Additives and Industrial Fillers on the Mechanical and Functional Properties of Open Graded Friction Course

Open graded friction course (OGFC) is widely recognized for its environmental and safety benefits (e.g., water drainage and noise reduction). However, based on durability concerns, many states have limited the use of OGFC. The objective of this study was to evaluate the effectiveness of warm mix asphalt (WMA) additives, by-products (i.e., crumb rubber [CR]), and industrial fillers (i.e., Portland cement and fly ash) in enhancing the laboratory performance of OGFC mixes. To achieve this objective, a comprehensive experimental program was conducted to evaluate the performance of eight mixes at three distinct stages (i.e., production, construction, and service). A suite of laboratory tests was conducted including draindown, prediction of compaction energy, Cantabro abrasion loss, Hamburg wheel tracking, Texas overlay, modified Lottman, and boiling tests to evaluate production, compaction, and OGFC resistance to raveling, permanent deformation, cracking, and stripping damage. Results indicated that CR, Portland cement, and fly ash significantly enhanced OGFC durability while maintaining adequate functional performance. In addition, results also showed that the use of an organic WMA additive considerably reduced the production temperature and compaction effort required to place the mix at the desired density while showing a significant improvement in OGFC durability.

Laboratory Evaluation of Warm-Mix Asphalt Open-Graded Friction Courses

This study aimed at evaluating the laboratory performance and physical characteristics of warm-mix asphalt (WMA) open-graded friction course (OGFC) mixes prepared with three warm-mix additives (two chemical additives and an organic additive). To achieve this objective, four mixes were prepared including a control mix (CM) prepared with a PG 76-22 binder and two sources of aggregate (i.e., # 78 limestone and # 67 sandstone). Air voids and coefficient of permeability ( k) were used to evaluate the functionality of the OGFC mixes. In relation to constructability, the compaction energy index was used to compare the required compaction effort during construction. Furthermore, the Cantabro test, Hamburg wheel-tracking test, Texas overlay test, Modified Lottman, and boil tests were conducted to evaluate durability, permanent deformation, cracking, and moisture-damage resistances of the evaluated mixes. Results indicated that the use of WMA technologies enhanced OGFC durability and performance. Among the evaluated mixes, the organic additive-OGFC met all Louisiana Department of Transportation and Development and NCHRP 01-55 requirements, as it notably enhanced OGFC durability, cracking, and moisture-damage resistance. Furthermore, the use of WMA notably reduced the required compaction effort and mixing temperature needed during production and construction as compared with the CM.

Predicting the abrasion loss of open-graded friction course mixes with EAF steel slag aggregates using machine learning algorithms

This study presents a comparative assessment of machine learning techniques for modeling the abrasion loss (AL) of open-graded friction course (OGFC) mixes. The proposed approach is Orthogonal Matching Pursuit (OMP), Huber Regressor (HR), Lasso Lars CV (LLCV), Lars CV (LCV), and Ridge Regressor (RR). To construct and validate the proposed models, a sum of 228 experiments of OGFC mixes with different proportions of natural aggregates and electric arc furnace (EAF) steel slag were performed. Based on the analyses with 4 different combinations of input parameters, the proposed OMP model exhibits the most accurate prediction of AL of OGFC mix in both training and validation phases. Comparison of results of the developed models indicated that the OMP model has the potential to be a new alternative to assist engineers/practitioners in estimating the AL of OGFC mixes. In addition, the effect of % replacement of natural aggregates with electric arc furnace steel slag can also be studied.

Laboratory Investigation of an Alternative Permeability Indicator to Determine Optimal Maintenance Timing for Open-Graded Friction Course

Open-graded friction course (OGFC) is a low impact development practice that provides a better pavement drainage solution and safer driving conditions. However, there exists a gap in understanding how internal pores in OGFC mix affect hydraulic conductivity, particularly when OGFC suffers the most rutting damage under the effects of high temperature and heavy traffic loading. There is also a lack of research on determining the optimal maintenance timing for an OGFC pavement. This study aims at characterizing the relationship of volumetric and permeability properties for OGFC slab specimens and quantifying permeability deterioration over time using a developed precipitation simulator and permeability measuring device and rutting test. Seven test temperatures (40, 45, 50, 55, 60, 65, and 70°C) were considered in the rutting test. The effect of clogging material size on permeability was also evaluated. The test results suggested that interconnected air void was lower than total air void, and higher rutting temperature resulted in reduced interconnected air void. The clogging experiment suggested that 0.3–0.6 mm material caused the most clogging while 0.075–0.15 mm material caused the least clogging. Based on this study, it is recommended to use a field measured rut depth as an alternative permeability indicator for determining optimal maintenance timing for an OGFC pavement using the correlation established between permeability and rut depth. A case study of OGFC pavement demonstrated that when the field measured rut depth reached 4.5 mm or higher, timely maintenance is needed.

Effect of hyper-modified asphalt binder and steel slags on cracking and rutting behaviour of wearing course mixtures

This paper presents a laboratory investigation aimed at evaluating the effect of employing hyper-modified asphalt binders in surface asphalt courses. Two different Hot Mix Asphalt (HMA) surface layers were investigated: an Open Graded Friction Course (OGFC) and a dense-graded blend. Two different asphalt binders were employed: a highly modified binder and an experimental hyper-modified binder. Both natural aggregates and steel slags were used for asphalt mixture design. The cracking behaviour of the mixtures were evaluated using a visco-elastic fracture mechanics-based cracking model. The cracking behaviour of the mastics was investigated using a Modified Direct Tension Test (MDTT), together with a Digital Image Correlation (DIC) system. The results showed that the hyper-modified binder provides better performance than the traditional hard modified one when used in the OGFC mix. Conversely, it does not bring great improvements in terms of fracture resistance for the dense-graded blend, but helps to resist more to rutting.

Mechanical properties of open graded friction course mixtures with different contents of electric arc furnace steel slag as an alternative aggregate from steel industries

With a production of 101.4 million tonnes (MT) in 2017, India is the third largest steel producer in the world. Electric arc furnace (EAF) steel slag is the waste/by-product generated from steel-making industries that utilise electric arc furnace process of steel production. About 12 MT of steel slag is generated annually in India, but merely 20% is put to applications and the rest is indiscriminately dumped in nearby landfills. The primary objective of this study is to evaluate performance characteristics of open-graded friction course (OGFC) asphalt mixtures with varying proportions of EAF steel slag as the coarse aggregate (>2.36 mm). OGFCs are gaining popularity in the Indian highway sector owing to their superior hydraulic (high permeability), acoustic (noise-reduction) and frictional properties that contribute towards improved road safety. The level of research on the use of EAF steel slag in OGFC is still very limited, especially in developing countries like India. Ten OGFC mix designs were investigated containing five percentage substitutions of coarse natural aggregates (0%, 25%, 50%, 75% and 100%) with the EAF steel slag and two modified asphalt binders (polymer and crumb rubber modified). Static creep test, dynamic creep test, Hamburg wheel tracking test, indirect tensile stiffness modulus test, and indirect tensile fatigue test were performed to evaluate rutting and fatigue performance of steel slag-OGFC mixtures. Results of the study reveal that the EAF steel slag-OGFC mixtures showed superior performance compared to control mixtures. The steel slag-OGFC mixtures up to 75% substitution presented the best results with both binder types.

Moisture Susceptibility of Open-Graded Friction Course Mixes with EAF Steel Slag and Modified Binders

Abstract Open-graded friction course (OGFC) mixtures are sensitive to the moisture damage because of their high air void content and longer exposure to water. In the present study, moisture susceptibility characteristics of OGFC mixes in terms of tensile strength characteristics, aggregate-binder bond strength, and the raveling potential of OGFC mixtures were studied. The experimental design for this study included OGFC mixes with two different types of aggregates (natural aggregates as a main source and electric arc furnace (EAF) steel slag as a secondary source), two different types of modified binders (polymer-modified bituminous binder and crumb rubber–modified bituminous binder), and one cellulose fiber as an additive. OGFC mixes were designed with five different percentages (0, 25, 50, 75, and 100 %) of secondary aggregates as a partial replacement of main aggregates. OGFC mixes were then evaluated for moisture susceptibility through four different test methods, viz. the indirect tensile strength (ITS) or tensile strength ratio (TSR) method, wet abrasion loss (WAL) method, static immersion test method, and modified boiling test method. OGFC mixes with EAF steel slag showed higher ITS values under both dry and wet conditions compared with the control mixes with natural aggregates alone. Steel slag content, binder type, and freeze-thaw cycles had statistically significant effects on the ITS, TSR, and WAL values. Modified boiling test results showed a good correlation with the modified Lottman and WAL test results.

Five-Year Performance of Improved Open-Graded Friction Course on the NCAT Pavement Test Track

Open Graded Friction Course (OGFC) mixtures are used as the final riding surface on roadways as they offer many benefits, such as reducing hydroplaning, reducing splash and spray behind vehicles for improved driver visibility, improving wet-pavement friction, and reducing surface reflectivity during wet-weather conditions. Despite these benefits, the use of OGFC has diminished over the years due to durability and service-life issues. The typical OGFC pavements in Alabama have exhibited premature distresses (e.g., raveling) after approximately six or seven years in service. Therefore, there is a need to change the current OGFC mix design procedure to improve the mix durability. In this study, three modified OGFC mixtures were designed based on a 12.5-mm OGFC mix design previously approved by the Alabama Department of Transportation (ALDOT) and paved in three test sections (E9A, E9B, and E10) on the National Center for Asphalt Technology pavement test track to evaluate possible changes to ALDOT’s OGFC mix design procedure. The ALDOT-approved mix design lasted less than 20 million equivalent single-axle loads (ESALs) on I-85, a few miles from the test track, whereas the three modified OGFC mixtures lasted more than 20 million ESALs and remained in place for another research cycle (10 millions ESALs) on the test track. The three modified OGFC mixtures also showed improved laboratory performance characteristics compared with those of the ALDOT-approved OGFC mixture. Based on the field and laboratory test results, adjustments made in the three modified OGFC mixtures can potentially improve the long-term field performance of OGFC mixtures in Alabama.

Laboratory Evaluation of Mix Design Parameters of Open-Graded Friction Course Mixes with Electric Arc Furnace Steel Slag

Abstract The presented work investigated the feasibility of utilizing electric arc furnace (EAF) steel slag in open-graded friction course (OGFC) mixes. The existing level of investigation on the use of industrial wastes, especially steel slag, in the production of OGFC mixes, is very limited, particularly in developing countries. To fill this gap, this study evaluated the OGFC mixes with EAF steel slag as a replacement of conventional natural aggregates. Mixes with five ratios of natural aggregate to EAF slag were evaluated. The ratios were 100:0 (control), 75:25, 50:50, 25:75, and 0:100. These five mix combinations were evaluated with two types of modified binder (polymer-modified binder and crumb rubber–modified binder). Performance and volumetric parameters, such as stone-on-stone contact criteria, air void content, unaged abrasion loss, aged abrasion loss, and binder draindown, were evaluated for OGFC mixes with and without EAF slag. Results indicated that EAF steel slag as a coarse aggregate improves the performance of OGFC mixes. Abrasion loss results showed that the durability of OGFC mixes with EAF slag is better than those with the conventional natural aggregates. Statistical analysis was performed through analysis of variance to examine the significance of binder content and slag replacement percentage.

Evaluation of the benefits of open graded friction course: Case study

This study evaluated the benefits of Open Graded Friction Course (OGFC) via two field projects constructed by the Nevada Department of Transportation: one project was in Elko, and the other was in Las Vegas. Each project included both the OGFC and Dense-Graded Hot Mix Asphalt (DGHMA) sections. The Elko project was located in the town area of Elko while the Las Vegas project was constructed in a rural area on I-15 interstate highway. Laboratory tests were performed to evaluate the durability, rutting, and moisture-susceptibility of OGFC mixtures. The selected test methods included the Cantabro test, Tensile Strength Ratio test, and Hamburg Wheel-Track test (HWTT). The laboratory test results showed that the Las Vegas OGFC mixture passed all the performance criteria, but the Elko Mixture failed to satisfy the HWTT criterion.The field performance tests were conducted to assess the permeability, friction, and noise functionality over time. The selected test methods included the NCAT falling head permeameter test, locked-wheel skid trailer test, and On-Board Sound Intensity test. The field performance results demonstrated that the Las Vegas OGFC pavement exhibited benefits in permeability, friction, and noise reduction compared to the DGHMA pavement, while the Elko OGFC pavement showed comparable performance with the DGHMA pavement after 2-years of service. Finally, a cost-benefit analysis was conducted to monetize the advantages and disadvantages of OGFC pavements. As demonstrated in the economic analysis, the OGFC pavement in Las Vegas reduced the net present value of OGFC costs by 36%, while the OGFC pavement in Elko increased the net present value of costs by 86%. This indicates that the implementation of OGFC is cost-effective in rural highways but impractical in urban or town areas. High speed traffic is generally needed to help keep the interconnected voids of an OGFC pavement from becoming clogged over time. As a result of the reduced speed on the Elko project, the permeability functionality was lost after one year and the noise reduction benefit was lost after thirty two months.

Clogging evaluation of open graded friction course mixes with EAF steel slag and modified binders

The open graded friction course (OGFC) mix performance and its effectiveness mostly depend on its permeability characteristics. Clogging of OGFC (due to deposition of sand and debris), resulting in the reduction of permeability characteristics, plays an important role in its consequential performance. In this study, the investigation was carried out to analyze the influence of electric arc furnace (EAF) steel slag, which is considered as a partial replacement of coarse (size above 2.36 mm) natural aggregates, on the clogging of OGFC mixes. OGFC mixes were designed using two types of aggregates viz. natural and EAF steel slag, and two modified bituminous binders viz. polymer modified and crumb rubber modified bitumen. The physical properties of the EAF steel slag were assessed to determine its suitability for OGFC mixes. Steel slag in five different percentages, viz. 0, 25, 50, 75 and 100% were used as the replacement of natural aggregates in the design of OGFC mixes. The falling head concept was used to measure the permeability on cylindrical OGFC specimens. Graded sand was used to determine the effect of clogging and de-clogging on the permeability of OGFC mixes. The percentage of EAF steel slag replacement was found to be strongly correlated to the porosity, which directly relates to its permeability of the OGFC mixes both before and after clogging. The secondary clogging rate is approximately fifty percent of the initial clogging rate for both polymer modified and crumb rubber modified OGFC mixes. The de-clogging process could be able to restore approximately an average of 86% and 93% of the initial permeability respectively for PMB-OGFC and CRMB-OGFC mixes.

Investigation of Los Angeles value and alternate aggregate gradations in OGFC mixtures

Open Graded Friction Course (OGFC) mixes with high air voids are mainly used to provide better service on the highway pavement during the rainy weather through draining water from the surface of the pavement. The objective of this study was to investigate performance characteristics of one low L.A. Abrasion aggregate compared to three high L.A. Abrasion aggregates as measured by various laboratory mix testing procedures to determine if overall OGFC mix performance was affected by an aggregate durability standpoint. In addition, three alternate aggregate gradations on the performance of OGFC mixtures were investigated. The main tests include permeability, Cantabro loss, and breakdown in the lab and asphalt plant of OGFC materials. The test results indicated that the high L.A. materials performed as well as the low L.A. material (Control) in most cases. In addition, various blends of similarly sized aggregates perform equally as well as the current South Carolina Department of Transportation (SCDOT) OGFC blend based on the limited laboratory testing conducted in this study. In the field testing, both the low L.A. Abrasion aggregate and high L.A. aggregates exhibited significant breakdown as measured from laboratory results of samples taken at various points in the production process as well as from visual observation during sampling. Constructing test sections using alternate gradations while maintaining desired OGFC mix properties is generally recommended.

Performance evaluation of open-graded epoxy asphalt concrete with two nominal maximum aggregate sizes

Open-graded friction course (OGFC) is applied to pavement surfaces to increase driving safety under wet conditions, and recently, to reduce tire/pavement noise. The durability of OGFC, however, has been a concern since conventional OGFC mixes last typically less than ten years before major maintenance or rehabilitation is needed. This work investigates a new open-graded asphalt mixture that uses epoxy asphalt as binder to improve mix durability. One type of epoxy asphalt that has been successfully applied to dense-graded asphalt concrete for bridge deck paving was selected. A procedure of compacting the mix into slab specimens was developed and a series of laboratory tests were conducted to evaluate the performance of the new mix, including Cantabro loss, permeability, friction, shear strength, and wheel rutting tests. Results show superior overall performance of the open-graded epoxy asphalt mix compared to conventional open-graded asphalt mix. There are also preliminary indications that the OGFC mix with 4.75-mm NMAS gradation can improve the resistance performance to raveling, while the OGFC mix with 9.5-mm NMAS gradation can improve the performance of surface friction at a high slip speed.

Louisiana's Experience with Open-Graded Friction Course Mixtures

The Louisiana Department of Transportation and Development (DOTD) began developing open-graded friction course (OGFC) mixtures in the late 1960s and early 1970s. Then, in the late 1980s, a moratorium was imposed on their use because of some early failure issues. However, OGFC mixture performance and service life have improved significantly since a new generation of OGFC mixture was promoted in the United States in the late 1990s. Inspired by the success of other state agencies, the Louisiana DOTD modified the earlier mix design and constructed four new OGFC sections during the past decade to evaluate pavement performance and safety benefits. This paper includes a comprehensive evaluation of Louisiana OGFC mixtures based on their laboratory and field performance. Laboratory work entailed material and mixture design in addition to numerous laboratory tests, namely permeability, draindown, tensile strength ratio, and loaded wheel test. Field evaluation involved visual inspection, pavement condition survey, skid resistance, and traffic safety. With few exceptions in the laboratory, the selected OGFC mixtures showed the potential to meet current Louisiana DOTD specifications, as well as various performance standards established by previous studies. The field analysis indicated that the OGFC test sections showed improved rutting, cracking, and skid performance when compared with typical Superpave® roadway sections. This performance evaluation will likely support the ongoing use of OGFC mixtures in the state of Louisiana. Additionally, the evaluation provides an opportunity to continually improve the current OGFC specification and mix design procedures adopted by the Louisiana DOTD.

Investigation of rutting potential of Open Graded Friction Course (OGFC) mixes using asphalt pavement analyzer

This study presents a laboratory evaluation on rutting resistance of Open Graded Friction Course (OGFC) mixes made with different polymer modifiers and coarse aggregate sizes. For this research work, six mix designs for three polymer modifiers (3% SBS modified, 6% LDPE modified, and 12% rubber modified) and two aggregate sizes (13 mm and 10 mm) were carried out to determine the optimum asphalt contents. The OGFC specimens were fabricated using the Superpave gyratory compactor at a compaction level of 50 gyrations. The air void contents and final rut depths of the mixtures were measured by the Corelok system and the Asphalt Pavement Analyzer (APA), respectively. In general, the results indicated that the polymer modifier plays an important role in the rutting resistance of the OGFC mixes used in this study. With respect to the coarse aggregate size, it was found to have little effect on the rutting potential.

Evaluation of Open-Graded Friction Course Mixtures Containing Cellulose Fibers and Styrene Butadiene Rubber Polymer

Open-graded friction course (OGFC) or porous mixtures consist of an open gradation, mostly of coarse size aggregate with little fines. The benefits of an OGFC mixture are typically increased surface permeability, noise reduction, and enhanced surface friction, especially in wet weather. This paper presents the results of a study investigating four different OGFC mixes containing no additives, cellulose fibers, styrene butadiene rubber (SBR) polymer, and a combination of both fibers and SBR polymer. Mix designs were performed according to the design procedure proposed by the National Center of Asphalt Technology for a range of 4.5–6.5% asphalt content. The mixture containing fibers and SBR polymer was selected as an acceptable mix design with an optimum asphalt content of 6.5%. The moisture susceptibility of the selected mix at optimum asphalt content was evaluated. Results were compared with that for a dense mix.

Effect of organic fibers on open-graded friction course mixture properties

Open-graded friction course (OGFC) or porous asphalt mixtures are special mixes used for improving the surface friction, increasing surface permeability, and reducing pavement noise. The mix consists mostly of coarse size aggregate with little fines. This study was conducted to evaluate the effect of two types of organic fibers: date-palm fibers and textile fibers, in combination with styrene butadiene rubber (SBR) polymer on the properties of OGFC mixes. A total of six different mixes were evaluated. Mix designs were performed according to the design procedure proposed by the National Center of Asphalt Technology (NCAT) for a range of 4.5–6.5% asphalt content. One-way ANOVA using the Tukey method of multiple comparisons was used to test the effect of the modifier and/or stabilizer on abrasion as an indication of raveling potential as well as draindown. The results indicated that the asphalt mix containing date-palm fibers and SBR polymer at 5.0% and the asphalt mix containing textile fibers and SBR polymer at 6.5% asphalt content satisfied the mix design criteria. The asphalt mixes at optimum asphalt content were evaluated for moisture susceptibility using the indirect tensile strength.