Proportions Of Binder Research Articles

Characterization of sustainable emulsions made from resin-based biobinder for road pavement applications

In this study, we analyzed the potential of employing an innovative eco-friendly resin-based binder, rather than bitumen, for the production of emulsions intended for road pavement applications. Therefore, the goal of this research was to better understand both the novel biobinder and new bioemulsion design and manufacturing processes. Initially, the resin-based biobinder underwent comprehensive characterization. Three physical properties—needle penetration, ring and ball softening points, and density—were determined. Fourier-transform infrared spectroscopy (FTIR) was employed to analyze the chemical functionality. Furthermore, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were conducted to investigate the thermal properties of the biobinders. Lastly, rheological analysis of the resin-based biobinder was carried out utilizing viscosity graphs generated by a dynamic shear rheometer (DSR). The results were compared with those obtained for two commercial penetration-grade bitumen samples (B35/50 and B50/70). Secondly, some bitumen emulsions (bioemulsions) were manufactured using 100% of resin-based biobinders in place of bitumen. These bioemulsions were characterized using standard tests for bitumen emulsions. Resin-based biobinders exhibit considerable potential. Specifically, their penetration grade closely resembles that of commercially available penetration-grade bitumen. Moreover, their light coloration facilitates the production of environmentally harmonious pavements. Furthermore, a notable enhancement in workability was attained. Additionally, all bioemulsions met standard specifications. Owing to their viscosity and other characteristics, these bioemulsions could be obtained at lower temperatures with ease, enabling the preparation of emulsions with higher proportions of binder. This, in turn, implies reduced energy consumption and consequently, diminished CO2 emissions.

Multiscale evaluation of asphalt binder rejuvenation dosing and efficacy

The final composition of asphalt binder in an asphalt mix can vary depending if it is a neat, virgin binder, or a blend of neat binder with reclaimed asphalt pavement (RAP), modifiers, and/or rejuvenators. As recycling of asphalt concrete becomes more commonplace worldwide, so too must be the use of chemical rejuvenators which can restore the original properties of the associated asphalt binder, contributing to the performance and therefore sustainability aspect of this material. In this context, this work aimed to evaluate the influence of rejuvenation in different proportions of aged and unaged binder, as well as the best way to dose rejuvenators, taking into consideration aspects that go beyond the Superpave Performance Grading characterization of binders. In the first phase of this study, when rejuvenator contents based on low PG recovery were proportionally added to different aged/unaged binder blends, it was observed that restoration of ductility and strength of the rejuvenated aged binder was limited. However, when an additional cycle of aging was applied to simulate the new service life of recycled material, the rejuvenated recycled material generally performed better than unrejuvenated recycled material. This long term effect can better differentiate the performance of different rejuvenators. Afterwards, the dosing procedure was investigated using an extensive range of dosages. An optimal dosage determination approach was developed and verified by means of the rejuvenation of aged asphalt mixtures from the rheological, mechanical, and chemical perspectives. Finally, the differences between laboratory-aged binder and laboratory-aged mixtures when rejuvenators are used was investigated, and it was determined that the mechanisms of rejuvenation at the two scales are not completely alike. Key findings also include the importance of re-aging asphalt binder blends before testing when a rejuvenator is used and the dominance of unaged binder within binder blends with limited replacement with recycled asphalt. Overall, this work opens the door to future studies of rejuvenation of asphalt using different approaches than those which have been conventionally used, including consideration of amount of replaced binder, using nonlinear viscoelastic characterization, fundamental chemical studies, and the method of addition based on mixture versus binder scale studies.

Properties of mortar containing Phragmites Australis Ash

Purpose The purpose of this paper is to examine the use of phragmites australis ash (PAA) in cementitious systems to achieve sustainable construction. Design/methodology/approach In this paper, the properties of mortar containing PAA as partial cement replacement are determined. The PAA is produced through slow burning in a closed system to minimize the CO2 emission. A total of four mortar mixes are prepared with PAA replacement levels ranging from 0% to 30% by weight. The water to binder and the proportions of binder to sand are 0.55 and 1:3 by weight, respectively. The properties tested are density, compressive strength, flexural strength, ultrasonic pulse velocity, water absorption by total immersion and capillary rise. Testing is conducted at 1, 7, 28 and 90 days. Findings While there is a decrease in strength as the amount of PAA increases, there is strong indication of pozzolanic reaction in the presence of PAA. This is in agreement with the results reported by Salvo et al. (2015), where they found noticeable pozzolanic activities in the presence of straw ash, which is rich in SiO2 and relatively high K2O content. At 90 days of curing, there is a decrease of 5% in compressive strength at 10% PAA replacement. However, at 20% and 30% replacement, the reduction in compressive strength is 23% and 32%, respectively. The trend in flexural strength and ultrasonic pulse velocity is similar to that in compressive strength. The water absorption by total immersion and capillary rise tends to increase with increasing amounts of PAA in the mix. There seems to be a linear relationship between water absorption and compressive strength at each curing age. Research limitations/implications The Phragmites australis plant used in this investigation is obtained from one location and this present a limitation as the type of soil may change the properties. Also one method of slow burning is used. Different burning methods may alter the composition of the PAA. Practical implications This outcome of this research will contribute towards sustainable development as it will make use of the waste generated, reduce the amount of energy-intensive cement used in construction and help generate local employment in the area where the Phragmites australis plant grows. Originality/value To the best knowledge of the authors, the ash from the Phragmites australis plant has not been used in cementitious system and this research can be considered original as it examines the properties of mortar containing PAA. Also, the process of burning in a closed system using this material.

Preparation of dopamine-modified sea squirt cellulose hydrogel dust-fixing agent to prevent raising of dust

Sea squirts, a tunicate, are found in all oceans and can foul marine ports and aquaculture, mainly affecting shipping and biodiversity. In this study, cellulose was extracted from sea squirts, and its hydrophilic properties were improved by substituting the hydrogen ions of the cellulose –OH with dopamine. The modified cellulose was used to prepare a hydrogel for use as a dust-fixing agent (CDP) to reduce air pollution caused by dust. After response surface method optimization, the proportions of binder, water-retaining agent, wetting agent, and antifreeze in CDP were 0.97, 1.44, 0.23, and 6.32%, respectively. This composition improved the wetting ability and permeability of CDP on particle surfaces. CDP exhibited good water retention at -11–50 °C. CDP reduced the wind erosion rate of dust at a wind speed of 12 m/s to 1.18%. The molecular dynamics method was used to analyze the wetting process and mechanism of CDP, revealing that hydrogen bonds were the dominant force at the solid-liquid interface. The adsorption of CDP onto the surface of coal increased the number of hydrophilic points. Water molecules were adsorbed on these hydrophilic points through hydrogen bonding, improving the binding energy between the solid and liquid interfaces. The application of ascidian cellulose in dust control makes full use of the biological value of ascidians, promoting sustainable development of the global biological economy.

Effect of pore structure on durability and mechanical performance of 3D printed concrete

The application of 3D printed concrete (3DPC) technology in the construction industry has become widespread in recent years. This paper provided a method for the 3DPC mix design and investigated the mechanical performance and durability of 3DPC. In this study, two optimized mixes were obtained based on the particle dense packing theory and the least squares method for calculating the proportions of binder for 3DPC. The microstructure of 3DPC was investigated by X-CT scanning to characterize its porosity for discussion of the anisotropic mechanical performance in the 3DPC. In addition, the frost resistance and chloride ion penetration resistance of 3DPC had been investigated. The results showed that the pore connectivity of 3DPC was better than that of casting concrete and the pores accumulated near the interface. In addition, the porosity calculation results showed that the porosity of the interface between layers was lower than that of the interface between filaments in 3DPC. All specimens of 3DPC showed excellent frost resistance with a maximum mass loss of only 0.18% and the average flexural strength and compressive strength of 3DPC were only reduced by 31.2% and 21.0% respectively after 300 freeze–thaw cycles. The maximum chloride migration coefficients for the 3D printed concrete specimen was 79 × 10-14 m2/s and the glass fiber enhanced the chloride ion penetration resistance of the specimens.

The binder-aggregate interface in NHL mortar with non-calcitic aggregate: Physical properties

In the absence of resources of calcitic aggregates this work aimed to confirm the suitability of Scottish aggregates in NHL mortar. Strength, sorptivity, porosity and carbonation of mortars made with one siliceous and one felsic (granitic) aggregate have been studied. The results suggest that there are no technical barriers to their use and that environmental and philosophical considerations reveal positive benefits. The measured properties all depend on the relative volume proportions of binder and aggregate, even at constant water/binder ratio and the trends can be explained by considering the behaviour at the binder-aggregate interface.

Optimization of proportions of a composite binder that has multi-component additives

Introduction. The problem of increasing the strength and durability of Portland cement stone is not new, but it is still highly relevant. To improve the properties of the cement binder at the stage of manufacturing cement composites, finely dispersed additives of inorganic origin can be used. They affect processes of hydration and curing of concrete. Finely dispersed additives, being fillers of mineral and inorganic origin, compact the structure of the cement stone, and, consequently, concrete itself due to substantial porosity reduction. They also increase its strength, impermeability and frost resistance and reduce shrinkage. Besides, these additives allow saving clinker and improve the water-retaining capacity of concrete mixes, preventing their segregation, if used together with superplasticizers.
 
 Materials and methods. The effect of binder compositions on mechanical properties of a composite binder was studied using the Box-Wilson experimental design method. The compressive strength of cement stone was determined at the age of 7 and 28 days using the method of result processing according to GOST 30744–2001. The study was conducted at the laboratory of Department of Building Materials Engineering of Moscow State University of Civil Engineering.
 
 Results. The results are presented as the surface of the second level regression equation, describing the dependence of compressive strength of the cement stone on the composition of multi-component expanding and pozzolanic additives. The optimal composition of the mix, having multi-component additives, was obtained as a result of the experiments.
 
 Conclusions. In the future the authors will contribute the results of this study to their research into the properties of binders, containing multi-component expanding and pozzolanic additives.

Optimal design of ferronickel slag alkali-activated mortar for repair exposed to high thermal load

In this work, the optimal design of a mortar based on alkali-activated material technology is presented. Ferronickel slag, a byproduct of the ferronickel alloy industry, was used both as a binder component (in a finely ground form) and as fine aggregate in alignment with a circular economy approach. The proportions of binder, fine aggregate, and water were optimized using Design of Experiment Design of Mixtures. The performance indicators evaluated were flow, flexural and compressive strength both before and after high-temperature exposure, mass loss, and thermal shrinkage. Life cycle assessment was used to calculate the relative environmental cost of the studied mixes in comparison to a counterpart traditional Ordinary Portland Cement mortar. The optimal mix design exhibited high flexural strength (8.5 and 10.5 MPa, before and after high-temperature exposure, respectively), an unheated compressive strength equal to 69.5 MPa, and a post-heating residual one of 33.9 MPa, 7.7% mass loss and 3.4% thermal shrinkage. Mercury Intrusion Porosimetry along with Scanning Electron Microscopy with Energy Dispersive X-Ray Analysis were also performed on optimal mortar samples in order to link micro-structural heat-induced changes to residual (post-heating) macro-mechanical performances. Finally, when compared to OPC-based products, the optimized mortar mix resulted in 70% lower CO2 emissions indicating great potential for the construction sector where concern about environmental impact keeps growing.

Recycling waste vehicle tyres into crumb rubber and the transition to renewable energy sources: A comprehensive life cycle assessment

This study conducts a comprehensive life cycle assessment (LCA) on converting waste vehicle tyres into recycled crumb rubber (CR) granules as an alternative polymer for enhancing asphalt properties. The LCA study has been performed on acquired industrial primary data by incorporating CR at different proportions of binder in one ton (1-ton) of asphalt mix following the wet method. The uncertainty analysis of design variables identified a relatively strong positive relation of emissions with the equipment energy consumption (r = 0.98). Monte Carlo simulations evaluate the potential renewable sources (solar, hydro, and wind) in sequence over fossil fuels for the possible transition in the Australian grid by 2030 and 2050, as per the Paris Agreement. 71.91% reduction of CO2 emissions is achievable by recycling vehicle tyres into crumb rubber compared to landfill and incineration. Recycling by-products of CR production, such as steel and textile, significantly mitigates negative impacts. A decrease of 2.23% emissions was associated to the use of crumb rubber as a binder modifier in the asphalt mixture via the midpoint assessment. In endpoint LCA, a higher association of resource (US$) saving costs was observed than for other protective zones, i.e., human health and ecosystem damage. Recycling 466,000 tonnes of disposable waste tyres contributes to 16.1 million US$ worth of resource savings. An equitable industry-based LCA and uncertainty analysis of design parameters can assist in prioritizing suitable options to improve efficiency and future emission strategies on a global scale.

Reflectance of Oil Paintings: Influence of Paint Layer Thickness and Binder Amount

Roughness, pigment impurities, and neoformed minerals are important factors affecting the reflectance of painted surfaces. However, other factors that have not yet been studied in detail, such as the total thickness of the paint layer and the amount of binder, should also be considered. In this research, oil painting mock-ups, each made with a different number of layers of paint containing a single pigment (lead white, orpiment, cinnabar, azurite or malachite) mixed with different proportions of oil binder, were examined using a hyperspectral imaging system. The results indicate that these characteristics do not directly influence the reflectance of the painted surface. Interestingly, we found that the distribution of the pigments and the oil binder in the paint system (and pigment-binder interaction) are also key to understanding the reflectance values. Thus, accumulation of oil on top of the uppermost paint layer in the multilayer painting mock-ups caused a reduction in reflectance. The increased translucency of the oil paint containing lead white pigment also modified the reflectance, possibly due to the formation of metal soap. Other factors found to affect the reflectance of the painting mock-ups are discussed.

Multiscale simulation approach to investigate the binder distribution in catalyst layers of high-temperature polymer electrolyte membrane fuel cells

A multiscale approach involving both density functional theory (DFT) and molecular dynamics (MD) simulations was used to deduce an appropriate binder for Pt/C in the catalyst layers of high-temperature polymer electrolyte membrane fuel cells. The DFT calculations showed that the sulfonic acid (SO3−) group has higher adsorption energy than the other functional groups of the binders, as indicated by its normalized adsorption area on Pt (− 0.1078 eV/Å2) and carbon (− 0.0608 eV/Å2) surfaces. Consequently, MD simulations were performed with Nafion binders as well as polytetrafluoroethylene (PTFE) binders at binder contents ranging from 14.2 to 25.0 wt% on a Pt/C model with H3PO4 at room temperature (298.15 K) and operating temperature (433.15 K). The pair correlation function analysis showed that the intensity of phosphorus atoms in phosphoric acid around Pt ({rho }_{mathrm{P}}{g}_{mathrm{Pt}-mathrm{P}}left(rright)) increased with increasing temperature because of the greater mobility and miscibility of H3PO4 at 433.15 K than at 298.15 K. The coordination numbers (CNs) of Pt–P(H3PO4) gradually decreased with increasing ratio of the Nafion binders until the Nafion binder ratio reached 50%, indicating that the adsorption of H3PO4 onto the Pt surface decreased because of the high adsorption energy of SO3− groups with Pt. However, the CNs of Pt–P(H3PO4) gradually increased when the Nafion binder ratio was greater than 50% because excess Nafion binder agglomerated with itself via its SO3− groups. Surface coverage analysis showed that the carbon surface coverage by H3PO4 decreased as the overall binder content was increased to 20.0 wt% at both 298.15 and 433.15 K. The Pt surface coverage by H3PO4 at 433.15 K reached its lowest value when the PTFE and Nafion binders were present in equal ratios and at an overall binder content of 25.0 wt%. At the Pt (lower part) surface covered by H3PO4 at 433.15 K, an overall binder content of at least 20.0 wt% and equal proportions of PTFE and Nafion binder are needed to minimize H3PO4 contact with the Pt.

Progress and Characterization of Pramipexole Extended-Release Tablets

Pramipexole dihydrochloride monohydrate is an antiparkinson’s agent which is known as dopamine D2 receptor agonist. It is structurally different from the ergot-derived drugs, e.g. bromocriptine or pergolide. Pramipexole is designated chemically as (S)-2-Amino-4, 5, 6, and 7- tetrahydro-6-(propylamino) benzothiazole and has the molecularformula C10H17N3S. It comes under class I of Biopharmaceutical Classification System. The purpose of this study was to develop and evaluate pramipexole dihydrochloride monohydrate extended release tablets by wet granulation method using different proportions of polymers and binder. Pre-formulation studies were done initially and the results were found to be within the limits. All the mentioned batches were prepared and granules were evaluated for pre-compression parameters such as loss on drying, bulk density, tapped density and compressibility index. Tablets were evaluated for weight variation,thickness, hardness, friability; disintegration time and assay were found to be within the limits. In vitro dissolutions were performed with 0.05M 6.8 PH phosphate buffer and effectof various polymerswere explored. Final selection of formulation was based on dissolution profile,from dissolution studies formulation 9 showed 80% drug release within 20 hours, so it will be compared with innovator. Similarity and difference factors which revealed that formulation (F 9) containing HPMC K 200, Eudragit L100 and binderare most successful as it exhibited in vitro drug release that matched with innovator product.In vitro drug release profilereveals that with increased concentration of Eudragit L 100. Accelerated stability studies were performed for the optimized batch which indicatedthat there were no changesin drug contentand in vitro dissolution.

Local calibration of the Hirsch model to determine the degree of blending between aged and virgin asphalt binders

Aged asphalt binder in reclaimed asphalt pavement (RAP) or recycled asphalt shingles (RAS) blends only partially with the virgin binder. To better understand this state of blending, the asphalt mixtures in this study were designed, mixed, and compacted using different RAP and RAS contents. The asphalt binders were extracted and recovered from RAP and RAS and then blended with different proportions of a virgin binder. The master curves for the asphalt mixtures and asphalt binder blends were then constructed from the measured data. A locally calibrated Hirsch model was developed to estimate master curves for the asphalt mixtures from the corresponding binder-blend data. Pairwise comparison of the master curves for RAP and RAS and virgin binder showed that degree of blending occurred at 50% to 60% for RAP and at 15% to 30% for RAS.

Fluidized Hot Melt Granulation Technique: An Approach to Improve Micromeritics Properties and Dissolution Rate of Efavirenz

The Fluidized hot melt granulation technique is a process by which pharmaceutical powders are efficiently agglomerated using a low melting binder. The effect of the binder properties and concentrations on agglomerate growth mechanisms were studied in this research paper using this technique with the primary objective of improvement in the solubility and dissolution rate of efavirenz by melt-dispersion granulation employing meltable hydrophilic carrier and then to convert the melt dispersion into flowable and compressible dispersion granules to yield a rapidly dissolving tablet formulation. The Optimized concentrations of co-polymers like PEG 6000, PEG 4000, Gelucire 50/13, Gelucire 44/14, Poloxamer 188 and Poloxamer 407 in different ratios (i.e., 1:1, 1:2, 1:3 and 1:4) as meltable binder along with the drug were sprayed dropwise over lactose as diluent loaded into fluid bed chamber for the preparation of the granules of efavirenz and characterized for its micromeritical properties, DSC, XRD etc. The tablets prepared from the granules were evaluated for drug dissolution rate. The prepared granules were found to have excellent flow properties indicated by mean diameter D50:138µm, Carr’s index 13.92% and the drug content uniformity of 98.10%. XRD data exhibited partial loss of crystallinity as indicated by significantly less intensity of efavirenz peak in sample than pure efavirenz. Drug release from tablet was fast found 99.12% w/v within 30 minutes. Absence of Efavirenz endothermic peak at higher proportions of meltable binder reported by DSC data exhibited amorphous form of efavirenz led to complete solubilization and thus faster dissolution rate of efavirenz.

Comparative and optimization studies of PE and PVP binder with different graphene electrodes for the reduction of hardness

An investigation was carried out in this work to assess the potential of graphene as an Electrode in the removal of hardness. The synthesis of graphene was obtained from pencil graphite by using the modified hummers method. Three sets of experimental studies were carried out to achieve the aim of this work. The first set of studies was carried out to assess the potential of Graphene Oxide (GO), Reduced Graphene Oxide (rGO), and graphene as an electrode material to reduce the concentration of hardness. The second set of studies was carried out to investigate the efficiency of different proportions of Poly Ethylene (PE) and Polyvinyl Pyrrolidone (PVP) binders to reduce the concentration of hardness. The last set of experimental studies was carried out to identify the parameters like Contact time, pH and initial concentration of hardness affecting the performance of the selected electrode material with the selected proportions of binder. The Graphene was found to have high removal efficiency of hardness due to its high specific surface area rather than GO and rGO. The PVP binder has high removal efficiency than PE binder. The maximum reduction of 87.75% hardness may be obtained when the contact time is kept as 30 min, pH in neutral condition and the electrolyte concentration as 400 mg/L.

Lateritic soil based-compressed earth bricks stabilized with phosphate binder

This work aimed to investigate the possibility of using binder obtained from calcined laterite and phosphoric acid as a novel stabilizing for the manufacturing of compressed earth bricks (CEB). Various proportions of binder from up to 20 wt% were used to stabilize the soils. Fourier Transformed Infrared Spectroscopy (FTIR), X-ray diffraction (XRD) thermal analysis (TGA-DSC), Scanning Electron Microscopy (SEM), water absorption and compressive strength tests were used to characterize the obtained products. The results showed that CEBs developed are highly resistant (similar to concrete) with dry compressive strength ranging from 17 MPa to 38 MPa and wet compressive strength from 6.3 MPa to 16.9 MPa. All the CEBs are also water-resistant and the water absorption was between 9.36-14.18 %. The increase of the binder content improves the performance of the compressed earth bricks. The new binder developed, which is based on the ferro-silico-aluminophosphate network, is effective for the stabilization of the lateritic soil for producing compressed earth bricks.

Improving Construction Engineering Properties of Soils Stabilized by a Cement Binder with Techno-Genic Products

The article considers the method of stabilizing roadbed soils by introducing metallurgical waste in the structure of the composite binder. It was established during the analysis and experimental research that construction engineering properties are improved as a result of the method. The article provides the obtained results of laboratory tests. The optimum amount of ground blast furnace slag as a component to replace part of Portland cement in a soil cement mix is determined. The dependence of strength gain on the hardening time at different proportions of the composite binder is given. The efficiency of the considered method of soil hardening is estimated.

Influence of chemical characteristics of RAP binders on the mechanical properties of binders and mixes

Utilization of reclaimed asphalt pavement (RAP) materials in the asphalt layer construction has emerged as an important rehab ilitation option for asphalt pavements. The properties of reclaimed asphalt material will be different from those of the initial (virgin) asphalt mixture due to the aging of the binder. Resilient modulus is an important material parameter used for the design of pavements. The mechanical behaviour of the mix and the binder is expected to be influenced by the chemical composition of the binder. In this study, the effect of the chemical composition of virgin and reclaimed asphalt pavement (RAP) binders on the resilient modulus (Mr) of RAP mixes has been evaluated. This is done by testing different RAP mixes prepared using bitumen samples containing different proportions of RAP binder. The RAP mixes prepared using one aggregate gradation (mid-point gradation recommended by the Ministry of Road Transport and Highways for Bituminous Concrete -1) and different RAP contents (0, 15, 25, 35 and 45%) with VG-30 as virgin binder, were tested for their resilient modulus values at different temperatures (15, 25 and 35°C) and frequencies (0.5, 1, 1.5 and 2 Hz). The chemical composition of the binder blends was evaluated with the help of Fourier transform infrared spectroscopy (FTIR). The relationship between the chemical indices and the rheological parameters has been examined. Ketones, aliphatics and aromatics are found to have good correlation with rheological properties. The chemical indices also are found to have good correlation with the resilient moduli of the mixes.

Initial assessment of reuse of sustainable wastes for fibreboard production: the case of waste paper and water hyacinth

In this early study, new cement-bonded bi-composite fibreboard (FB) was made from water hyacinth (WaHy) and waste paper (WP). Ordinary Portland cement (PdCe) used as a binder was mixed with other two additives: gypsum plasters (GyPl) and wood ash (WdAh), in defined proportions to form bonding matrices. The WP and WaHy were pre-treated and a linked process was developed for the mixing and consolidation steps. The FBs produced were based on different proportions of composites, binder, and additives mixed. The FBs produced were made from different proportions of composites, binders, and additives. Improved tensile strength was observed for bi-composite FB from WaHy mixed with WP. In general, FBs having densities in the range of 0.50–0.57 g cm−3 were compared favourably with the ASTM and ANSI standards (95%), thus making the FBs a potential alternative for building and construction purposes. More elaborate research with advanced analytical techniques is hereby suggested.

Influence of Recycled Asphalt Pavement on Interfacial Energy and Bond Strength of Asphalt Binder for Different Types of Aggregates

The bond between aggregate and asphalt binder depends on many factors, such as chemistry of materials, nature of aggregates, and quality of asphalt binder. The present study evaluates the effects of recycled asphalt pavement (RAP) on the bonding behavior of asphalt binder for acidic (granite and quartzite) and basic (basalt and limestone) aggregates. AC30 binder was blended with different proportions of RAP binder (15%, 25%, and 40%). The interfacial energy and bond strength of 16 combinations (four asphalt binders × four aggregates) of aggregate-asphalt binder system were evaluated based on a surface free energy (SFE) approach and binder bond strength (BBS) test, respectively. One of the strong motivations of the present study was to evaluate how interfacial energy parameters calculated based on the SFE of an aggregate-asphalt binder system may correlate with the outcome obtained from a BBS test. The results showed that AC30 binder modified with RAP binder had a good performance for basic aggregates compared with acidic aggregates. Basic aggregates (limestone and basalt) showed cohesive failure before and after conditioning, indicating minimal effects of water on interfacial bond strength. However, acidic aggregates (granite and quartzite) showed cohesive failure in dry conditions and adhesive failure after wet conditioning, implying detrimental effects of water on interfacial bond strength for these aggregates. The failure pattern of aggregates in cohesion was supported by a reduction in cohesion energy of asphalt binder after the addition of RAP binder. Correlation between interfacial energy parameters (obtained from SFE) and BBS strength depends on aggregate types and failure patterns.