The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform

F Navarro - One of the best experts on this subject based on the ideXlab platform.

Tapas Kumar Roy - One of the best experts on this subject based on the ideXlab platform.

  • Performance evaluation of Bituminous Mix and mastic containing rice husk ash and fly ash as filler
    Construction and Building Materials, 2021
    Co-Authors: Raja Mistry, Tapas Kumar Roy
    Abstract:

    Abstract The current study examined the performance of Bituminous Mix and mastic containing rice husk ash (RHA) and class F fly ash (FA-F) in various quantity as a substitute to conventional hydrated lime filler. For this purpose, Marshall Mix design, indirect tensile strength, modified Lottman test with multiple freeze–thaw cycles and atomic force microscopy test were performed. The test results indicated that RHA and FA-F incorporated Mixes delivered a paramount performance at relatively lower optimum bitumen content (OBC). Moreover, RHA showed a homogeneous dispersion of bee structure in the mastic and exhibited the highest adhesion force which may be credited to its fine and porous nature.

  • Predicting Marshall stability and flow of Bituminous Mix containing waste fillers by the adaptive neuro-fuzzy inference system
    Revista de la construcción, 2020
    Co-Authors: Raja Mistry, Tapas Kumar Roy
    Abstract:

    The practice of using different non-biddable wastes in place of conventional filler is successively extended nowadays, leading it hard to predict the properties of modified Bituminous Mixes. The present work aims to explore the effect of using rice husk ash (RHA) and fly ash (FA) as alternative filler in place of conventional filler like hydrated lime (HL) on Marshall stability and flow of Bituminous Mix by fuzzy logic. This study involves the preparation of samples having seven different bitumen content varying from 3.5% to 6.5% with 0.5% increment. Mixtures containing 2%, 4%, 6% and 8% of HL, RHA and FA separately as filler were fabricated and compared with the control Mix (i.e. Mix containing 2% hydrated lime as filler). Further, the Marshall Mix design procedure was followed to determine the optimum bitumen content (OBC) of each Mix. Experimental results showed that the replacement of conventional filler with RHA and FA improved the Marshall properties and decreases the OBC values of the modified Mix when added with 4% filler ratio. Further, for predicting the Marshall stability and flow, a Mamdani-type fuzzy inference system model was devised in Matlab toolbox using percentage bitumen, air voids, percentage of HL, RHA and FA as input and Marshall stability and flow as output. In comparison, it is realized that predicted values are closely relevant to the actual one and the prediction ability of the fuzzy logic model is suitable for getting the said values by avoiding the expensive, time consuming and repetitive laboratory tests.

  • effect of aggregate type on marshall properties of Bituminous Mix containing fly ash as filler
    PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON SUSTAINABLE MATERIALS AND STRUCTURES FOR CIVIL INFRASTRUCTURES (SMSCI2019), 2019
    Co-Authors: Angushuman Pandit, Raja Mistry, Tapas Kumar Roy
    Abstract:

    Reusing of rapidly growing wastes is an important environmental concern and usage of agricultural and industrial wastes in road construction is a practice of years. Accordingly in this paper study the effect of using FA as alternative filler in place of conventional HL on Marshall Properties of Bituminous Mix having both calcareous LSA and siliceous BSA. For this purpose, samples were prepared using four different bitumen content between 4.5% and 6.0% by total weight of aggregate at 0.5% increments and with 2%, 4% and 6% filler content for both the said aggregates. The control Mix was prepared using BSA with HL filler. The optimum bitumen content (OBC) was then determined for all the Mix by Marshall Mix design. The study result showed that the Mixes having FA as filler with both BSA and LSA give less OBC values compare to control Mix. The Mix having LSA give better MS values than BSA and also the Mix contain FA give better MS value as compare to control Mix except for 2% FA as filler in case of LSA aggregate. MQ results indicated that the FA filler mainly in higher percentage (4% and 6%) provide stiffer Mix than HL for both the aggregates. So this study discusses the feasibility of using FA as alternative filler instead of HL in asphalt concrete Mix in the areas where LSA and FA are generally available.Reusing of rapidly growing wastes is an important environmental concern and usage of agricultural and industrial wastes in road construction is a practice of years. Accordingly in this paper study the effect of using FA as alternative filler in place of conventional HL on Marshall Properties of Bituminous Mix having both calcareous LSA and siliceous BSA. For this purpose, samples were prepared using four different bitumen content between 4.5% and 6.0% by total weight of aggregate at 0.5% increments and with 2%, 4% and 6% filler content for both the said aggregates. The control Mix was prepared using BSA with HL filler. The optimum bitumen content (OBC) was then determined for all the Mix by Marshall Mix design. The study result showed that the Mixes having FA as filler with both BSA and LSA give less OBC values compare to control Mix. The Mix having LSA give better MS values than BSA and also the Mix contain FA give better MS value as compare to control Mix except for 2% FA as filler in case of LSA aggreg...

  • moisture damage analysis of Bituminous Mix by durability index utilizing waste plastic cup
    Journal of Materials in Civil Engineering, 2018
    Co-Authors: Sandip Karmakar, Tapas Kumar Roy, Debanjan Majhi, Deepak Chanda
    Abstract:

    AbstractMoisture damage is a major problem in every tropical country that may occur in pavement structures during their design life due to inappropriate selection of aggregates and bitumen from a m...

Mahabir Panda - One of the best experts on this subject based on the ideXlab platform.

  • Microstructural characteristics of Bituminous Mix using X-ray CT
    International Journal of Pavement Research and Technology, 2019
    Co-Authors: Subhashree Jena, Bignya Ranjan Pathi, Mahabir Panda
    Abstract:

    The study of internal structure of Bituminous paving Mixes is very essential to understand its air void (AV) characteristics, which ultimately influences the structural and functional performances of Bituminous Mixture. The present study is an attempt to investigate the AV properties and their distribution in a profound and precise manner using an effective and quick three dimensional (3-D) high resolution technology such as X-ray micro computed tomography (X-ray CT) combined with the digital image processing tools. Using 3-D images obtained from imaging technique, the internal structure of Bituminous Mix was visualized and then image analysis was done to determine various AV parameters such as AV content, number of AV, AV size and shape of AV of the compacted Bituminous specimen. Two compaction methods, namely Marshall method and Superpave gyratory compaction (SGC) methods were used to prepare dense graded Bituminous concrete (BC) specimens. With the help of continuous spatial data obtained from volumetric X-ray CT images, the variation of AV parameters were assessed along the vertical, horizontal and radial directions of the specimens. The results show that the distribution of various AV parameters is quite uniform in radial direction as compared with vertical and horizontal directions. For both compaction methods, higher percent AVs are present in top and bottom parts of the specimens as compared with the middle part of the specimens. Besides, Marshall specimens exhibit more heterogeneity in the distribution of AV parameters in the horizontal direction as compared with SGC specimens.

  • Performance Evaluation of Bituminous Paving Mixes Containing Sisal Fiber as an Additive
    Transportation Infrastructure Geotechnology, 2019
    Co-Authors: Debashish Kar, Jyoti Prakash Giri, Mahabir Panda
    Abstract:

    Cellulose fibers are generally used as a stabilizer in Bituminous Mixes like stone matrix asphalt (SMA) Mixes, to stop draindown of the binder from a Mix, and are also helpful in reinforcing the cracked roadway. This present study investigates the potential use of naturally occurring fibers known as sisal fiber as a stabilizer in stone matrix asphalt as well as dense-graded Bituminous Mix namely Bituminous concrete (BC). Marshall test is simple, economical, and commonly available to evaluate the optimum bitumen content (OBC) and optimum fiber content (OFC) of Mixes and to predict various Marshall criteria: Marshall stability, flow value, air voids, voids in mineral aggregate, and voids filled with bitumen. In this study, VG 30 bitumen has been used as a binder and fly ash, a waste material which has been used as filler. Further, the paving Mixes were investigated based on various laboratory tests such as draindown test, moisture susceptibility test, and dynamic modulus test where Mixes are prepared at their respective OBC and OFC. The test results indicated that addition of 0.3% of sisal fiber to a Mix with fly ash as filler remarkably improves the engineering properties of both Mixes considered.

  • influence of Mix parameters on design of cold Bituminous Mix
    Construction and Building Materials, 2018
    Co-Authors: Swayam Siddha Dash, Mahabir Panda
    Abstract:

    Abstract In the absence of design uniformity, it is difficult to form reliable correlations between experimental results for Cold Bituminous Mixes (CBM) reported by different researchers/agencies/organizations. This paper presents a study on effects of various Mix parameters such as aggregate gradation, method and level of compaction, variation in filler materials on performance of CBM. Dense (BC) and Gap (SMA) graded CBM were produced by both Marshall and gyratory method with varying level of compaction. Also, variations in filler materials (cement, lime, fly-ash) were done to evaluate the property of CBM. Finally, hot Bituminous Mixes were produced with same gradations (BC and SMA). A comparative study on test results has been made on basis of the Marshall Stability and air voids content of compacted Mixes. It is observed that optimum residual bitumen content (ORBC) of cold Mixes is not much affected by factors such as initial residual bitumen content (IRBC) and optimum total liquid content (OTLC). Rather, it mostly depends on the aggregate gradation. Considering all the selected parameters it is observed that only in case of gyratory compaction 3%–5% range of air voids can be achieved in CBM. Besides, though each and every parameter has contributed to increase the Marshall Stability of CBM, the most significant improvement as comparable with hot Mixes is found to be caused by cement filler in comparison with other parameters. Also, higher load sustaining capacity of dense graded CBM is observed by its superior Marshall properties in comparison to gap graded CBM.

  • A Study on Use of Natural Fiber for Improvement in Engineering Properties of Dense Graded Bituminous Mixes with Coal Ash
    Transportation in Developing Economies, 2016
    Co-Authors: Saswat Biswapriya Dash, Mahabir Panda
    Abstract:

    Coal-based thermal power plants have been a major source of power generation in India. The prime waste products of a coal based thermal power plant are fly ash and bottom ash. Heavy dumping of these waste products causes fatal environment pollution to air, water, and land, besides impairing human health. This research work is done to explore the optimum use of ash, namely bottom ash (as part of fine aggregate) and fly ash (as mineral filler) along with natural fiber (such as sisal fiber) used to improvise the engineering properties of Bituminous paving Mixes. In the present laboratory study, dense graded Bituminous Mix specimens were prepared using natural aggregates as coarse aggregates, bottom ash as fine aggregates, fly ash as filler and sisal fiber as additive. To strengthen the Mix, slow setting emulsion (SS1) coated sisal fiber was added in varying percentages such as 0, 0.25, 0.5, 0.75, and 1 % by weight of the Mix, with variations of sisal fiber length such as 0, 5, 10, 15 and 20 mm. The most suitable composition (such as optimum bitumen content and optimum fiber content including the optimum length of fiber in the Bituminous Mix) was selected based on the results of Marshall tests. Further, for justifying the performances of the Bituminous paving Mix thus developed, tests for indirect tensile strength and moisture susceptibility in the form of tensile strength ratio and retained stability of Bituminous Mixes were conducted.

  • effect of aggregate gradation on cold Bituminous Mix performance
    Advances in Civil Engineering Materials, 2015
    Co-Authors: Swayam Siddha Dash, Mahabir Panda
    Abstract:

    Aggregate gradation is the skeleton of a Bituminous Mixture and is responsible for the load carrying capacity of the pavement. This paper presented a study on variation in aggregate gradation, which is based on and adapted from the concept of the Bailey method, to evaluate the property of cold Mixes. A total of 14 cold Mixes were studied for dense (BC) and gap stone matrix asphalt (SMA) graded Mix. For each dense and gap gradation, one initial aggregate gradation was taken as per available standard specifications. From each type of initial gradation (BC and SMA), six aggregate gradations were developed. The Marshall test and indirect tensile strength (ITS) test of all cold Mixes were conducted. Then the static creep test was conducted for each type of cold Mix prepared with initial gradation, and the developed gradation performed best in the former two tests. The test results were compared with hot Mix asphalt (HMA) performance with initial gradations (BC and SMA). The study indicated that though all of the developed gradations increased the Marshall stability of cold Mixes, the most significant improvement compared with the HMA Mixes was found in the case of the increased coarse aggregate (CA) ratio among the Bailey parameters. It was also observed that the modification of aggregate gradation resulted in substantial improvements in Marshall properties, ITS, and creep resistance.

Egons Tons - One of the best experts on this subject based on the ideXlab platform.

  • aggregate rugosity and size effect on Bituminous Mixes
    Transportation Research Record, 1998
    Co-Authors: Taisir S. Khedaywi, Egons Tons
    Abstract:

    Higher costs and possible restricted availability of asphalt have stimulated research and discussion on how to reduce the amount of asphalt in Bituminous Mixes without sacrificing service. A hypothesis was proposed suggesting that for each coarse aggregate type with different surface characteristics there is a specific fine aggregate size that contributes to developing an interlocking mechanism between the surfaces of coarse aggregates when they are combined in a Bituminous Mix. To test this hypothesis, two types of coarse aggregates having different surface characteristics or rugosity, limestone and rounded gravel, were used. For each aggregate, two one-size fractions were tested—19 mm to 25 mm and 6.4 mm to 4.75 mm. One type of fine aggregate (limestone) with five one-size fractions was used. Four flow binder film thicknesses were chosen. The packing volume and rugosity concepts were the theoretical basis. Asphalt and aggregate Mixes were tested in compression. The results were evaluated by the use of r...

  • Aggregate Rugosity and Size Effect on Bituminous Mixes
    Transportation Research Record: Journal of the Transportation Research Board, 1998
    Co-Authors: Taisir S. Khedaywi, Egons Tons
    Abstract:

    Higher costs and possible restricted availability of asphalt have stimulated research and discussion on how to reduce the amount of asphalt in Bituminous Mixes without sacrificing service. A hypothesis was proposed suggesting that for each coarse aggregate type with different surface characteristics there is a specific fine aggregate size that contributes to developing an interlocking mechanism between the surfaces of coarse aggregates when they are combined in a Bituminous Mix. To test this hypothesis, two types of coarse aggregates having different surface characteristics or rugosity, limestone and rounded gravel, were used. For each aggregate, two one-size fractions were tested—19 mm to 25 mm and 6.4 mm to 4.75 mm. One type of fine aggregate (limestone) with five one-size fractions was used. Four flow binder film thicknesses were chosen. The packing volume and rugosity concepts were the theoretical basis. Asphalt and aggregate Mixes were tested in compression. The results were evaluated by the use of regression equations. Graphical presentations and illustrations were used as necessary. Unconfined compression test results showed that for one-size limestone coarse aggregate, the highest strength values were associated with No. 60 to No. 80 fines in the Mix and for one-size rounded gravel coarse aggregate, the highest strength occurred when No. 200 to No. 270 fines were added to the Mix. The highest strength was associated with 50 μm flow binder film thickness for all Mixes.

Gema Garciatrave - One of the best experts on this subject based on the ideXlab platform.