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Dharamveer Singh - One of the best experts on this subject based on the ideXlab platform.
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Performance Evaluation of Polymer-Modified Binder Containing Reclaimed Asphalt Pavement Using Multiple Stress Creep Recovery and Linear Amplitude Sweep Tests
Journal of Materials in Civil Engineering, 2018Co-Authors: Dharamveer Singh, Shashibhushan Girimath, Prabin Kumar AshishAbstract:AbstractThe present study evaluates the effects of reclaimed asphalt pavement (RAP) Binders collected from two different sources (RAP-A and RAP-S) on Superpave performance grade (PG), rutting, and ...
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evaluating effectiveness of wma additives for sbs Modified Binder based on viscosity superpave pg rutting and fatigue performance
Construction and Building Materials, 2017Co-Authors: Aniket V Kataware, Dharamveer SinghAbstract:Abstract Addition of Warm Mix Additives (WMA) is expected to cause viscosity reduction and hence could offer lower working temperature. However, it is equally important to study effects of WMA additives on rutting and fatigue behavior of Binder. Therefore, the current study aims to investigate rheological characterization of a control SBS polymer Modified Binder (PMB) with and without WMA additives through different tests such as viscosity, Supepave high performance grade (PG), multiple stress creep recovery (MSCR), linear amplitude sweep (LAS). Three WMA additives namely Sasobit® (wax based) (Wax-S), Rediset® (chemical/surfactant based) (Che-R) and Advera® (water based/ zeolite) (Zeo-A) were used in the present study. The PMB was mixed with three different percentages of Wax-S, Che-R and Zeo-A, thus a total of ten Binders were prepared in the laboratory. The results showed that addition of Wax-S and Che-R decreased viscosity of PMB, while addition of Zeo-A increased viscosity of PMB. Wax-S additive was found to bump high PG and enhance rutting and fatigue performance of PMB. Che-R additive degraded high PG and also deteriorated rutting and fatigue performance. Similarly, Zeo-A additive reduced high PG and showed negligible effects on rutting and fatigue performance. The study showed that viscosity might not be considered as a sole criterion for selection of WMA additive. Some WMA additives may decrease viscosity, however, they may also degrade short-term and long-term performance of Binders. Thus, a proper caution should be taken while selection of a WMA additive for a type of Binder.
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influence of rap sources and proportions on fracture and low temperature cracking performance of polymer Modified Binder
Construction and Building Materials, 2016Co-Authors: Dharamveer Singh, Shashibhushan GirimathAbstract:Abstract The present study evaluates effects of reclaimed asphalt pavement (RAP) obtained from two different sources on fracture and low temperature cracking resistance of a polymer Modified Binder (PMB). Two different RAPs, one from urban highway (RAP-A) and other from rural highway (RAP-S) were collected. The Binder extracted from RAP-A and RAP-S had different viscosity, rheological and chemical characteristics. The Binder extracted from RAP-A was found to have higher viscosity and stiffer nature compared to RAP-S. The PMB Binder was blended with different proportions (i.e., 0, 15, 25 and 40% by weight of Binder) of RAP-A and RAP-S. The double edge notched tension (DENT) test was conducted to evaluate fracture cracking potential of PMB Binder containing different percentages of both the RAPs. Further, low temperature cracking potential of RAPs blended Binders was measured using bending beam rheometer (BBR) test. The results from the DENT test showed the second peak in the load-displacement curve for the control PMB disappeared with addition of RAPs, indicating damage to polymer interlinking. Inclusion of RAP-A (urban highway source) in PMB resulted in a smaller critical crack tip opening displacement (CTOD) value compared to RAP-S (rural highway source). The statistical analyses showed that lower percentage of RAPs (i.e., 15% RAP-A and 15% RAP-S) had similar effect on CTOD value of PMB, however, at higher percentage of RAPs (25% and 40%), both RAPs found to behave differently. The BBR test showed that addition of RAPs resulted in increase in stiffness and decrease in m-value, indicating poor low temperature cracking potential of PMB. The addition of RAP-A resulted in lower m-value compared to RAP-S. Based on the DENT and the BBR tests, it can be concluded that the PMB Binder with RAP-A could be more fracture susceptible compared to Binder with addition of RAP-S. The low temperature performance grade (PG) of PMB did not change significantly with addition of even 40% of both the RAPs, which is contrary to what is being reported in literature. The findings presented in the paper showed that RAP source and its proportions can have different impact on performance of mixes, thus assuming that nature of RAP Binders remains same irrespective of change in a source may lead to premature failure of a pavement.
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evaluation of rutting fatigue and moisture damage performance of nanoclay Modified asphalt Binder
Construction and Building Materials, 2016Co-Authors: Prabin Kumar Ashish, Dharamveer Singh, Siva BohmAbstract:Abstract Recent impetus on utilization of different types of nanomaterials for modification of asphalt Binders has motivated the authors to undertake the present study. The present study evaluated the rutting, fatigue and moisture damage performance of nanoclay (CL-30B) Modified asphalt Binder based on newly adopted test methods. Based on Superpave rutting parameter, it was observed that rutting resistivity of a Binder increases with an increase in CL-30B content. Moisture resistivity of CL-30B Modified asphalt Binder with different types of aggregates system was studied using Surface Free Energy (SFE) approach. The SFE components of nanoclay Modified Binder were measured using Wilhelmy plate method. Four different types of aggregates (Basalt, Limestone, Sandstone and Granite) were chosen for the study. Overall increase in total SFE of the Binder was observed with addition of CL-30B. Increase in work of cohesion and decrease in work of debonding was observed with an increase in CL-30B for all type of considered aggregate. Based on Energy ratio (ER), asphalt Binder with basaltic aggregate was found to have better moisture damage resistivity among different types of aggregate selected in this study. The fatigue performance of CL-30B Modified Binder was evaluated using Linear Amplitude Sweep (LAS) test which is based on Visco Elastic Continuum Damage (VECD) theory. The analyses of the data showed that addition of CL-30B enhances fatigue life of a Binder. The study showed potential of CL-30B to enhance various rheological performance of a Binder for better and long lasting pavements.
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understanding effects of rap on rheological performance and chemical composition of sbs Modified Binder using series of laboratory tests
International journal of pavement research and technology, 2016Co-Authors: Dharamveer Singh, Dheeraj SawantAbstract:Abstract The present study aims to evaluate rutting, fatigue, and rheological performances of a SBS co-polymer Modified Binder (PMB40) blended with different percentages (i.e., 0%, 15%, 25% and 40%) of reclaimed asphalt pavement (RAP) Binder. The change in viscosity, mixing and compaction temperatures, and temperature susceptibility of PMB40 Binder mixed with RAP were measured using Brookfield viscometer. Furthermore, linear viscoelastic range (LVE) and time-temperature sweep tests were conducted to characterize Binders. The rutting and fatigue performance of PMB40 Binder with varying percentages of RAP was evaluated using multi stress creep and recovery (MSCR) and linear amplitude sweep (LAS) tests, respectively. The change in chemical composition of PMB40 Binder with addition of RAP was determined by Fourier transform infrared (FTIR) spectroscopy. The results showed that addition of RAP makes PMB40 Binder stiff and less temperature susceptible, however, it did not change mixing and compaction temperatures significantly. Furthermore, high temperature performance grade (PG) of PMB40 Binder was unaltered with addition of RAP, which is contrary to findings reported in literature. The MSCR test showed significant reduction in recovery and increment in non-recoverable creep compliance of PMB40 Binder with addition of RAP, indicating a poor rutting resistance of the Binder with inclusion of RAP. The LAS test showed that rate of damage increases and number of cycles to fatigue failure of PMB40 Binder decreases with addition of RAP. The FTIR test confirmed increase in sulfoxide and carbonyl content with addition of RAP. A good correlation was found for ICO and ISBS indices obtained from FTIR with rheological properties of PMB40 Binder. It is to be noted that the findings presented in this paper are based on one Modified Binder and one RAP source, thus it is recommended that effects of different RAP sources on performance of SBS Modified Binder be studied in detail. Further, effects of ageing (short term and long term) should be studied to have insight into characterization of RAP blended Binders. It is also recommended that Binder’s rheological performance tests be validated by conducting laboratory tests on asphalt mixes.
Suresha Subbarao Nagabhushanarao - One of the best experts on this subject based on the ideXlab platform.
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Effect of optimized short-term aging temperature on rheological properties of rubberized Binders containing warm mix additives
Construction and Building Materials, 2020Co-Authors: Hemanth Kumar Veeraiah, Suresha Subbarao NagabhushanaraoAbstract:Abstract This study investigates the effect of warm mix asphalt (WMA) additives and base Binder, on the rheological properties of crumb rubber Modified Binder (CRMB-55) at higher temperatures. The rheological properties of the base Binder VG-30, VG-40, and CRMB-55 are subjected to optimized short-term aging and compared with its unaged condition. WMA such as Sasobit and Rediset additives enhance the CRM Binders by optimizing the mixing temperature by reducing it to 18 °C through the rotational viscometer (RV) test. This optimized temperature is implemented on the RTFO aging temperature at 177 °C and compared with both standard mixing temperature of 163 °C for the base Binder and 195 °C for the crumb rubber Modified Binder to simulate the ideal mixing viscosity and to determine its rheological properties. In this study, the dynamic shear rheometer (DSR) is employed to measure the complex shear modulus (G*) and the phase angle (δ) of all the Binders at various short-term aging temperatures. The Fourier transform infrared spectroscopy (FTIR) and the Scanning Electron Microscopy (SEM) are also applied to justify the effects of the WMA additives on the CRM Binders in terms of chemically and morphological properties. It is identified that the two WMA additives can improve the rheological properties of the CRM Binders more effectively by optimizing the short-term aging temperature, and greatly enhance the viscoelastic properties at the high-temperature condition for the CRM Binders. It is found that Sasobit has the most remarkable effect on G* and δ at 177 °C RTFO-aged for CRMB-55 than with the Rediset WMA additives, and always suggest implementing this optimized short-term aging temperature for CRM Binders before evaluating any rheological behaviour.
Baha Vural Kök - One of the best experts on this subject based on the ideXlab platform.
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evaluation of the conventional and rheological properties of sbs sasobit Modified Binder
Construction and Building Materials, 2014Co-Authors: Baha Vural Kök, Mehmet Yilmaz, Mustafa AkpolatAbstract:Abstract The effort of constructing durable roads with higher standards has required to research the usage of various additives in bituminous coating so far. Nowadays polymer modification is effectively applied, and additives, which can provide better compaction and less expense by improving workability features are considered. These additives contribute to performance as well as workability. In this study conventional and rheological properties of Binders, which include styrene–butadiene–styrene (SBS) in various rates and an organic warm mixture additive (Sasobit®), are investigated. The effects of additives, which are used separately and together in the Binder are examined. As a result, it was found out that warm-mix-additive modification has better performance than SBS modification in terms of temperature susceptibility and SBS modification has better than Sasobit modification in terms of rutting parameter especially in high temperatures. Also, Sasobit® modification significantly decreased the viscosity and increased the softening point compared to SBS modification. The results show that the properties of the bitumen Modified with combined additives are significantly different from that of individually Modified bitumen. If additives are used in the same mixture together, warm-mix-additive can be added in certain ratios into SBS modification in order to obtain same properties stated above.
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evaluation of high temperature performance of sbs gilsonite Modified Binder
Fuel, 2011Co-Authors: Baha Vural Kök, Mehmet Yilmaz, Murat GulerAbstract:Abstract SBS is a widely used polymer modifier for asphalt Binders to improve the performance properties of hot mix asphalt. SBS is nearly indispensable when the Binder properties do not satisfy the specification requirements under hot service temperatures. One of the concerns in using such additives, however, is the increased cost especially for large-sized construction projects. If a natural modifier can be used to replace some portion of industrial modifier products, such as SBS, it would significantly help reduce the cost of pavement construction. In this study, Gilsonite, a natural asphalt, is used as a Binder modifier to reduce the SBS content based on a series of rheological testing. While studies on various properties of Binder that is Modified only by Gilsonite are common, we investigate the effect of combining SBS and Gilsonte in the same base Binder. In the first phase, the Binders Modified individually with SBS and Gilsonite are evaluated in terms of based on the outcomes of dynamic shear rheometer and rotational viscosimeter tests. Then, the asphalt Binders including both SBS and Gilsonite at different contents are subjected to the same rheological testing. The results show that around 3–4% times more Gilsonite is needed to replace 1% of SBS when the two modifiers are mixed in the same Binder depending on the Gilsonite/SBS ratio selected. Besides, the viscosity of Modified Binders with a percent of SBS replaced with Gilsonite is always lower than that of SBS-only Modified Binder. It is suggested that Gilsonite can be used as an alternative modifier to reduce the cost of asphalt mixture production and compaction in the field.
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Evaluation of high temperature performance of SBS + Gilsonite Modified Binder
Fuel, 2011Co-Authors: Baha Vural Kök, Mehmet Yilmaz, Murat GulerAbstract:Abstract SBS is a widely used polymer modifier for asphalt Binders to improve the performance properties of hot mix asphalt. SBS is nearly indispensable when the Binder properties do not satisfy the specification requirements under hot service temperatures. One of the concerns in using such additives, however, is the increased cost especially for large-sized construction projects. If a natural modifier can be used to replace some portion of industrial modifier products, such as SBS, it would significantly help reduce the cost of pavement construction. In this study, Gilsonite, a natural asphalt, is used as a Binder modifier to reduce the SBS content based on a series of rheological testing. While studies on various properties of Binder that is Modified only by Gilsonite are common, we investigate the effect of combining SBS and Gilsonte in the same base Binder. In the first phase, the Binders Modified individually with SBS and Gilsonite are evaluated in terms of based on the outcomes of dynamic shear rheometer and rotational viscosimeter tests. Then, the asphalt Binders including both SBS and Gilsonite at different contents are subjected to the same rheological testing. The results show that around 3–4% times more Gilsonite is needed to replace 1% of SBS when the two modifiers are mixed in the same Binder depending on the Gilsonite/SBS ratio selected. Besides, the viscosity of Modified Binders with a percent of SBS replaced with Gilsonite is always lower than that of SBS-only Modified Binder. It is suggested that Gilsonite can be used as an alternative modifier to reduce the cost of asphalt mixture production and compaction in the field.
Murat Guler - One of the best experts on this subject based on the ideXlab platform.
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evaluation of high temperature performance of sbs gilsonite Modified Binder
Fuel, 2011Co-Authors: Baha Vural Kök, Mehmet Yilmaz, Murat GulerAbstract:Abstract SBS is a widely used polymer modifier for asphalt Binders to improve the performance properties of hot mix asphalt. SBS is nearly indispensable when the Binder properties do not satisfy the specification requirements under hot service temperatures. One of the concerns in using such additives, however, is the increased cost especially for large-sized construction projects. If a natural modifier can be used to replace some portion of industrial modifier products, such as SBS, it would significantly help reduce the cost of pavement construction. In this study, Gilsonite, a natural asphalt, is used as a Binder modifier to reduce the SBS content based on a series of rheological testing. While studies on various properties of Binder that is Modified only by Gilsonite are common, we investigate the effect of combining SBS and Gilsonte in the same base Binder. In the first phase, the Binders Modified individually with SBS and Gilsonite are evaluated in terms of based on the outcomes of dynamic shear rheometer and rotational viscosimeter tests. Then, the asphalt Binders including both SBS and Gilsonite at different contents are subjected to the same rheological testing. The results show that around 3–4% times more Gilsonite is needed to replace 1% of SBS when the two modifiers are mixed in the same Binder depending on the Gilsonite/SBS ratio selected. Besides, the viscosity of Modified Binders with a percent of SBS replaced with Gilsonite is always lower than that of SBS-only Modified Binder. It is suggested that Gilsonite can be used as an alternative modifier to reduce the cost of asphalt mixture production and compaction in the field.
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Evaluation of high temperature performance of SBS + Gilsonite Modified Binder
Fuel, 2011Co-Authors: Baha Vural Kök, Mehmet Yilmaz, Murat GulerAbstract:Abstract SBS is a widely used polymer modifier for asphalt Binders to improve the performance properties of hot mix asphalt. SBS is nearly indispensable when the Binder properties do not satisfy the specification requirements under hot service temperatures. One of the concerns in using such additives, however, is the increased cost especially for large-sized construction projects. If a natural modifier can be used to replace some portion of industrial modifier products, such as SBS, it would significantly help reduce the cost of pavement construction. In this study, Gilsonite, a natural asphalt, is used as a Binder modifier to reduce the SBS content based on a series of rheological testing. While studies on various properties of Binder that is Modified only by Gilsonite are common, we investigate the effect of combining SBS and Gilsonte in the same base Binder. In the first phase, the Binders Modified individually with SBS and Gilsonite are evaluated in terms of based on the outcomes of dynamic shear rheometer and rotational viscosimeter tests. Then, the asphalt Binders including both SBS and Gilsonite at different contents are subjected to the same rheological testing. The results show that around 3–4% times more Gilsonite is needed to replace 1% of SBS when the two modifiers are mixed in the same Binder depending on the Gilsonite/SBS ratio selected. Besides, the viscosity of Modified Binders with a percent of SBS replaced with Gilsonite is always lower than that of SBS-only Modified Binder. It is suggested that Gilsonite can be used as an alternative modifier to reduce the cost of asphalt mixture production and compaction in the field.
Daniel Castrofresno - One of the best experts on this subject based on the ideXlab platform.
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assessment of carbon black Modified Binder in a sustainable asphalt concrete mixture
Construction and Building Materials, 2019Co-Authors: Raquel Casadobarrasa, Pedro Lastragonzalez, Irune Indacoecheavega, Daniel CastrofresnoAbstract:Abstract Carbon black has been used as a modifier in conventional Binders together with a relatively low percentage of SBS polymer. In addition, an Evotherm additive has been combined by the wet way with the aim of decreasing the manufacturing temperature of the asphalt mixtures. The impact of these two has been analysed with a DSR rheometer, showing an increase in stiffness. An Asphalt Concrete mixture was then designed using the experimental Binder and the warm mix additive and compared with a reference mix, using a commercial polymer Modified bitumen. The final experimental mixture was manufactured 15 °C cooler than usual, showing good mechanical performance despite the low percentage of natural aggregate, which was mostly composed of reclaimed asphalt and slag. Its stiffness and fatigue resistance were also investigated. Finally, the mixture was laid in an experimental road section under real conditions as proof of concept of the technology.