Rutting Resistance Of Asphalt Mixtures Research Articles

Effect of UV radiation on the high temperature and fatigue performance of SBS modified asphalt and asphalt mixture

In this study, the effects of UV radiation on the high temperature fatigue performance of SBS modified asphalt and asphalt mixtures were analyzed, and the effects of outdoor atmospheric UV radiation were simulated by indoor UV accelerated aging test. The results showed that the increase of UV radiation time led to the increase of creep recovery rate of asphalt and the decrease of irrecoverable creep flexibility, i.e., the resistance to permanent high temperature deformation of SBS modified asphalt was improved. The fatigue cracking resistance of asphalt was weakened and accelerated by radiation. UV radiation increased the rutting resistance of asphalt mixtures and weakened the fatigue resistance at high temperatures. At the same time, UV radiation reduced the aromatic and saturated content of SBS modified asphalt, which led to a reduction in the relative aromatic and saturated content of asphalt mixtures.

Effects of utilization of rejuvenator in asphalt mixtures containing recycled asphalt pavement at high ratios

This study investigated the properties of asphalt mixtures, including recycled asphalt pavement, at high ratios. In addition, to improve the properties of asphalt mixtures containing recycled asphalt pavement, bitumen was modified with a rejuvenator at proportions of 2, 4, and 6% and used together with 35, 40, and 45% recycled asphalt pavement. Based on test results, the strength of asphalt mixtures increased as the ratio of recycled asphalt pavement added to asphalt mixtures increased. In addition, all combinations of recycled asphalt pavement and rejuvenator agent had higher indirect tensile strength values according to the reference mixture. The rutting resistance of asphalt mixtures increased as the ratio of recycled asphalt pavement added to the asphalt mixtures increased. Asphalt mixtures containing 45% recycled asphalt pavement and 2% rejuvenator-modified bitumen showed the best rutting resistance. The significance of the obtained results was determined with appropriate statistical analysis. So, it has been determined that the rejuvenator used in this study can effectively improve the properties of asphalt mixtures containing recycled asphalt pavement. Finally, the rejuvenator agent used in this study allowed the utilization of recycled asphalt at a higher ratio than the amount specified in the Highway Technical Specification.

Impact of Airport De-Icing Chemicals and Freeze-Thaw on Rutting Resistance of Asphalt Mixture in Canada

Acetate-based ice control chemicals have been shown to have less environmental impact compared with traditional de-icing salts. However, their impact on the asphalt pavement’s performance has been underestimated and has drawn the attention of pavement engineers. This study was undertaken to evaluate the effect of de-icing chemicals (potassium acetate) and the freeze-thaw cycle on the rutting resistance of asphalt mixtures. Two types of airport pavement mixtures (AS and AB) and three roadway mixtures (HL3, HL3 HS, and HL1) were tested through the Hamburg wheel tracking test (HWTT) under three different treatments for the testing specimens: treated with potassium acetate solution, with one freeze-thaw cycle; and treated with potassium solution and one freeze-thaw cycle, respectively. The results show that potassium acetate solution and the freeze-thaw cycle can significantly affect the rutting resistance of all tested mixtures, and potassium acetate might have the potential to induce stripping damage on asphalt mixtures. A combination of de-icing treatment and the freeze-thaw cycle can potentially mitigate the stiffness compromise caused by their sole impact. Asphalt binder type, asphalt content, and different treatment methods have a statistical effect on the rutting resistance of asphalt mixture applied both on airside and roadway pavements.

Effect of crumb rubber and reclaimed asphalt pavement on viscoelastic property of asphalt mixture

Crumb rubber and reclaimed asphalt pavement have been widely used in the application of pavement engineering as they would greatly improve the high-temperature stability and rutting resistance of asphalt mixtures. This study aimed to give a comparative analysis of the viscoelastic improvement effect of crumb rubber and reclaimed asphalt pavement. In laboratory tests, 2 virgin binder contents, 2 crumb rubber contents, 2 sources of reclaimed asphalt pavement, and 2 reclaimed asphalt pavement contents were involved to produce 12 different types of asphalt mixtures with controlled aggregates gradation. Single axle creep test and dynamic modulus test were conducted to acquire stress-strain response under static and dynamic loading conditions. Creep performance was obtained under 20 °C, 35 °C and 50 °C, and dynamic modulus was obtained under 5 °C, 20 °C, 35 °C and 50 °C at 0.1 Hz, 0.5 Hz, 1 Hz, 5 Hz, 10 Hz and 25 Hz. Master curves were constructed for creep compliance, complex modulus, phase angle, storage, and loss modulus in the time and frequency domains, and an optimal fitting model was selected. As a result, it was found that both crumb rubber and reclaimed asphalt pavement had a positive effect on the elasticity of the asphalt mixture. In most scenarios, the elasticity improvement was dominated by reclaimed asphalt pavement but it was dependent on the aged binder content. The effect of incorporating crumb rubber and reclaimed asphalt pavement together was comparable to the sum of the effect when incorporating each of them solely.

Exploring potential of Marshall-RT as simple performance test to evaluate rutting resistance of asphalt mixtures

ABSTRACT This study explored a new simple monotonic Marshall rutting test (Marshall-RT) to evaluate the rutting resistance of asphalt mixtures. The Marshall-RT test setup combines the Marshall fixture (at the bottom) and the IDT fixture (at the top). The rutting resistance of asphalt mixtures was evaluated using peak load (Pmax) and work done for the deformation damage obtained from the load-displacement curve. Nine plant-produced asphalt mixtures having different types of binders (unmodified, crumb rubber modified binder (CRMB)), and polymer modified binder (PMB)) and gradations having different nominal maximum aggregate sizes (NMAS) were evaluated. The Marshall-RT test parameters (i.e. Pmax and W P m a x ) have shown a strong correlation with fundamental (i.e. Flow Number (FN)), simulative (i.e. Hamburg wheel tracking test (HWTT)), and simple monotonic (i.e. Ideal rutting test (IDEAL-RT)) rutting tests. Moreover, the Marshall-RT test has shown good repeatability, the highest differentiation potential, and consistent ranking with other rutting tests. Furthermore, for high traffic levels (i.e. 100 MSA (Million Standard Axle)), at 50°C preliminary minimum threshold criteria were proposed for Marshall-RT (Pmax and W P m a x ), and IDEAL-RT (RTIndex) as 5 kN, 14 kN-mm, and 90, respectively, to avoid premature rutting failure. Thus, the newly developed monotonic Marshall-RT test can also be used as a surrogate simple performance test to estimate the rutting potential of asphalt mixtures during the mix design and plant production phases as quality control (QC)/quality assurance (QA).

Investigating the Potential of High-Density Polyethylene and Nano Clay Asphalt-Modified Binders to Enhance the Rutting Resistance of Asphalt Mixture

This study investigates the potential of two bitumen modifiers, high-density polyethylene (HDPE) and nano clay (NC), to enhance the rutting resistance of asphalt mixture. Four HDPE asphalt binders were prepared by mixing the HDPE at percentages of 2%, 4%, 6%, and 8% with the virgin binder, while four NC asphalt binders were produced by mixing the NC at percentages of 1%, 2%, 3%, and 4%. The consistency and flow of virgin binder, HDPE binders, and NC binders were evaluated by penetration, softening point, and viscosity tests. The results show a gradual increment in the binder stiffness by increasing the percentage of both modifiers. The static creep test was conducted at a temperature of 40 °C to evaluate the rutting resistance. The results confirm that both modifiers can greatly improve the rutting resistance of the asphalt mixture, where 8% HDPE and 3% NC modifications reduce the strains provoked in the asphalt mixture under loading by about 50%. According to the correlation analysis, the mixture rutting performance is highly attributed to the binder stiffness, where the lower the penetration value of the asphalt binder, the lower the strains in the asphalt mixture and the higher the stiffness modulus of the asphalt mixture.

Research on the effects of asphalt performance on rutting resistance and its correlation with rutting performance indicators

The rutting development of asphalt pavement is generally divided into two stages including the initial densification and the shear slow. The rutting resistance of asphalt mixture is greatly affected by the performance of asphalt. However, the effects of asphalt performance on the different rutting development stages are not fully clear. This paper is aimed to evaluate the applicability of rutting performance indicators to asphalt performance and further identify the correlation of changes in asphalt performance with rutting development stages. The rutting tests were carried out to study the effect of asphalt performance on the rutting resistance, in which the asphalt grade, modifier type and content, and asphalt type were involved. The dynamic stability (DS), complex stability index (CSI), Tseng-Lytton (A/C), and Gladkikh (1/E) models were selected as the rutting performance indicators. Results of the rutting test show that the application of low-grade asphalt and modifier has a larger reduction in the rutting depth. The polyethylene (PE) modifier has the largest contribution to the rutting resistance and a better composite modified effect with the styrene–butadiene–styrene (SBS) modified and 30# asphalt. The asphalt mixtures with low-grade and crumb rubber (CR) modified asphalt have the lowest temperature sensitivity. Furthermore, the asphalt performance has great effects on the initial densification stage, as well as the shear slow stage. The A/C and CSI that are related to both the initial and secondary rutting stages are the most reliable indicators to characterize the effect of asphalt performance on the rutting resistance of asphalt mixture. The correlations of DS and 1/E with the rutting depth are lower than the former two indicators, indicating that these only related to the secondary rutting stage are not recommended.

A laboratory evaluation of factors affecting rutting resistance of asphalt mixtures using wheel tracking test

Rutting is one of the most common distresses in early damage to asphalt pavements. It can raise the risk of ride safety issues, accelerate pavement deterioration, and increase maintenance costs. To investigate the factors that affect the rutting resistance of asphalt mixtures, internal factors (such as aggregate gradation, asphalt content, and layer thickness), external factors (including temperature and traffic loading), and human factors (such as compaction degree) were tested using wheel tracking tests. The test results showed that the rutting resistance of asphalt mixtures can be improved by designing a tightly interlocked aggregate skeleton using the Bailey method's primary control sieve, using an optimal asphalt content, achieving sufficient compaction, maintaining a layer thickness of 2.5–3 times its nominal maximum aggregate size, using an asphalt softening point higher than the pavement temperature, and avoiding overloaded vehicles. In highly rutted areas, it is recommended to use a stone mastic asphalt with a stable aggregate skeleton matrix and styrene-butadiene-styrene modified asphalt with a softening point higher than the highest pavement temperature.

Effect of coordination number of particle contact force on rutting resistance of asphalt mixture

Optimizing asphalt mix design at the indoor stage is of significant importance for enhancing the rutting resistance of asphalt mixture, which is affected by its structural characteristics. In this work, the coordination number of particle contact force (CNpcf) was proposed as an indicator to represent contact characteristics of skeleton structure aggregates in asphalt mixture. Nine asphalt mixtures with different gradations were designed, and the relationship of CNpcf with the number of aggregate contact zones (CZ) was established by combining rutting tests and digital image processing technique (DIP). The Mann-Whitney U test was implemented to analyze the distribution properties of inter-particle contacts before and after the rutting test. In addition, the resistance to the further expansion of rutting was analyzed. The results revealed a significant positive correlation (PCCs = 0.843, R2 = 0.711) between CNpcf and CZ. The content of coarse aggregates in the dominant structure did not exhibit monotonic related to anti-rutting performance of the asphalt mixture. Therefore, an optimum aggregate content of 57% was utilized. The Mann-Whitney U test revealed that the mesoscale skeleton structure of the asphalt mixes before and after rutting exhibited excellent stability. This study further indicated the applicability of combining CNpcf to adjust the mix design to enhance the rutting resistance of asphalt mixture and to prevent rutting expansion in flexible pavement.

Feasibility of high titanium heavy slag used as aggregates for asphalt mixtures

High titanium heavy slag (HTHS) is a typical solid waste produced in the iron production process of vanadium titanomagnetite. The feasibility of using the HTHS as coarse aggregates in the two gradations of AC-13 and AC-20 asphalt mixtures mixed with base asphalt and SBS modified asphalt binders was discussed in this paper. Firstly, the physical and chemical properties of HTHS were tested. Then, asphalt mixtures with limestone coarse aggregate were replaced by HTHS at five rates of 0% (control), 25%, 50%, 75% and 100% were designed and made by Marshall method. Twenty types of asphalt mixtures was discussed by their different volume properties, and the volume properties of asphalt mixtures under the optimal asphalt content (OAC) were further verified. Finally, selected properties of asphalt mixtures under the optimum asphalt content were tested. Results showed that 1) HTHS had low activity and good stability, the mechanical properties met the requirements of coarse aggregates for asphalt mixtures; 2) With the increased replacing rate of HTHS, the OAC and asphalt absorbed by aggregate (Pba) of 20 asphalt mixtures increased simply due to the porous structure of HTHS; 3) The rough, hard surface of HTHS improved the mechanical anchoring force between aggregates and increased the Marshall stability and rutting resistance of asphalt mixtures. However, with the increased replacing rate of HTHS, the Marshall residual stability, freeze-thaw splitting strength ratio and maximum tensile strain at low temperature decreased.

Application of a stochastic damage model to predict the variability of creep behavior for asphalt mixtures

The creep test is used as the main method of evaluating the rutting resistance of asphalt mixtures, but the variability has rarely been studied. Based on creep tests, this study investigated the stochastic nature of the mixture creep through mechanical modeling. First, creep tests were carried out on mixtures under different conditions. Consequently, the creep behavior was characterized using a fractional creep damage model (FCDM) and a variability analysis was performed. Second, a proposed creep stochastic damage model (CSDM), developed using a meso-mechanical approach, was utilized to characterize the variability behavior of the damage evolution, and the range of variation in damage evolution was predicted within a certain confidence interval. Subsequently, combined with FCDM, the variation of mixtures during creep was predicted. This study confirmed that the creep variability of mixtures is related to rutting resistance, and the better rutting resistance implies lower variability. The validation and prediction results show that the CSDM can well describe the stochasticity of damage, and that the variability of creep behavior for asphalt mixtures can be well predicted on the basis of the stochasticity of damage evolution. The physical mechanism of damage stochasticity in the mixture creep was clearly demonstrated on the mesoscopic scale.

Impact of aggregate structure restoration on rutting resistance of asphalt mixtures with very high percentages of RAP

ABSTRACT Bailey method is a well-proved method to build strong aggregate structure, but it is originally devised to do so by proportioning the fractionated virgin aggregate stockpiles. Yet, the concepts of strong aggregate structure in the Bailey method stand true in any type of aggregate. This study develops a method for correcting the bad gradation of RAP by utilising Bailey’s concepts. The virgin aggregate stockpiles are added minimally into RAP to establish a firm aggregate skeleton. This changes the philosophy of aggregate blend design from the RAP following an existing good gradation to the RAP gradation correction. The effectiveness of the method was evaluated by the indirect tensile (IDT) strength and laboratoire des ponts et chaussées (LPC) wheel tracking tests. The mixtures whose gradations were rectified by this method, whether coarse dense-graded (CDG) or fine dense-graded (FDG), have significantly higher rutting resistance than 100% RAP mixture.

Laboratory investigation of graphene modified asphalt efficacy to pavement performance

The pavement industry is in constant search of new asphalt binder modifiers. Modifying the asphalt binder allows for a wider temperature range, which provides better performance and longer pavement service life. This study aims to evaluate the efficacies of graphene-modified asphalt on pavement performance through the laboratory test on asphalt binder and asphalt mixtures prepared with unmodified and graphene-modified binders. Four different graphene types (varied in particle size and purity), two types of asphalt binder (neat and SBS-modified) and two types of asphalt mixture (surface and base) were used in this study. Three binder types were chosen to perform the asphalt mixture performance tests IDEAL CT and Flow Number. Based on the results of this work, it was concluded that graphene could effectively increase the rutting resistance of asphalt mixture; however, the cracking resistance is strongly correlated to the quality of the graphene (particle size and purity).

Non-recoverable creep behavior and micro-structural analysis of recycled bitumen containing aged bitumen and TLA modified bitumen

TLA modified bitumen can effectively improve the rutting resistance of asphalt mixture, and the application of reclaimed asphalt pavement (RAP) in TLA modified bitumen needs to be further improved. In order to further improve the rutting resistance of bitumen, and to more comprehensively evaluate the high temperature resistance characteristics, a variety of recycled bitumen containing different contents of aged bitumen and TLA modified bitumen were prepared. Then, based on the penetration grades (PG) analysis and multiple stress creep recovery (MSCR) tests, the effects of temperature, time, aging, loading stress and aged bitumen content on the non-recoverable creep behavior of recycled bitumen were evaluated. Finally, the enhancement mechanism of the rutting resistance was analyzed from the aspects of morphology and modulus by atomic force microscopy (AFM). Results indicate that recycled bitumen with a higher content of aged bitumen can show better creep recovery characteristics under constant temperature changes, and is less susceptible to aging and high stress. Under the same traffic load conditions, the service environment of recycled bitumen can be increased by 6 ℃ for every 20% increase in the aged bitumen content. Aged bitumen can help TLA modified bitumen better accumulate heavy components, enhance the overall surface roughness and material stiffness, which can contribute to the better resistance to the rutting deformation.

Enhancement of the Rutting Resistance of Asphalt Mixtures at Different High Temperatures Using Waste Polyethylene Polymer

The temperature and stress caused by the load can be cited as two main parameters leading to breakage in asphalt pavement, especially rutting (permanent deformation). So, to reduce the problems of rutting of roads, several actions have been taken, including improving pavement quality and the structure design methods. The increase in the attention of respective engineers in the last few years to modify and improve the asphalt performance through providing different types of additives and replacing the raw materials of asphalt mixture with recycled materials to improve the environment and reduce the cost of modified pavement mixture. This study discussed the use of low-density waste polyethylene as an asphalt modifier in percentages of (2, 4, and 6) % by the weight of asphalt and their impact on the performance of asphalt mixtures at high temperatures. This study showed that using plastic waste (low-density polyethylene) as a bitumen modifier improved the performance of asphalt mixtures at different high temperatures. This was achieved by reducing the rut depth by (80.5) % and (82.3) % at temperatures of 50 C and 60 C, respectively, using low-density polyethylene waste at an optimum value of about 4% by weight of asphalt in addition to enhancing the Marshall stability by using this percentage of polymer.

Laboratory performance of dense graded asphalt mixtures prepared using highly polymer modified binders containing corn oil as softening agent

• High Polymer Modified Asphalt (HPMA) with corn oil can resist short term aging. • Crack Propagation slows with HPMA and corn oil combination compared to Control. • Life Cycle Analysis shows the cost-effectiveness of the optimized combination of HPMA and Corn Oil. This study evaluated the impact of aging on High Polymer Modified Asphalt (HPMA) mixtures containing a softening agent (SA). The aging susceptibility was evaluated in terms of rutting, cracking, and durability. Four asphalt mixtures were prepared, one with PG 52–34 binder as control, and three others using modified PG 52–34 with varying dosages of Styrene Butadiene Styrene (SBS) and corn oil (SA). The tests performed to evaluate the impact of aging (short, long, extended long term) were the Dynamic Complex Modulus, Hamburg Wheel Tracking, Flow Number, Indirect Tension and semi-Circular Bend tests. Based on these testing results, SBS and SA increased the durability and rutting resistance of asphalt mixtures. Modified asphalt mixtures also showed better cracking resistance than the control mix (i.e. lowering of crack propagation). However, with aging, fatigue cracking performance diminished while remaining comparable to the control mix. A balanced dosage of SBS (7.5%) and SA (7%) led to the best improvement in durability, rutting, and short-term cracking performance.

Porosity of municipal solid waste incinerator bottom ash effects on asphalt mixture performance

Dispose and utilization of municipal solid waste incinerator bottom ash (MWSIBA) is one of the imperative issues in environmental protection. The applicability of substitution for natural aggregate with MWSIBA in asphalt mixture was investigated by the performance and micro structure of asphalt mixtures with diverse porosity levels of MWSIBA (varying the replacement percentage). The effects of porosity of MWSIBA on asphalt mixture performance were captured by determination of Marshall stability, tensile strength, dynamic stability and the maximum flexural-tensile strain. The horizontal vibration extraction procedure test was implemented for the heavy metal leaching concentration to evaluate the environmental safety of MWSIBA asphalt mixture. Chemical and micro-morphologic characterization for MSWIBA were conducted to explore the mechanism of moisture damage resistance of asphalt mixture. Results indicated that porosity and replacement rate of MWSIBA exerted impacts on properties of asphalt mixture. The rutting resistance of asphalt mixture decreased due to the addition of MWSIBA, resulting in a reduction in high temperature performance. MWSIBA with porosity no less than 19% was beneficial to the improvement of moisture susceptibility and low temperature performance of asphalt mixture, while high mixing amount of MWSIBA was unfavorable to the properties of asphalt mixture. The water immersion stimulated the hydration reaction in MWSIBA, leading to the formation of C-(A)-S-H gel with strong cementation property, which enhanced the adhesion between MWSIBA and asphalt binder. MWSIBA asphalt mixture presented lower heavy metal concentration and better environmental safety than MSWIBA.

Rutting Behaviour of Geopolymer and Styrene Butadiene Styrene-Modified Asphalt Binder.

Modifying asphalt binders is an effective method of improving the performance of asphalt pavement, such as its resistance to rutting. However, because modification changes the behaviour of binders, substantial laboratory testing is required before field application to determine the best mixtures. This research aimed to evaluate the impacts of temperature, stresses, polymer type, and modification rate on the rutting behaviour of the asphalt binder modified with fly-ash-based geopolymer (GF), styrene butadiene styrene (SBS), and a combination of SBS and GF. The rheological properties of asphalt binders were investigated using the frequency sweep test at various temperatures. Additionally, the multiple stress creep recovery test was conducted at various temperatures and stresses to calculate the non-recoverable creep compliance (J) and the percent strain recovery (R). The rutting resistance of asphalt mixture was assessed using the Hamburg wheel rut test. The results revealed that the asphalt binder with 8% geopolymer (8%GF) exhibited the best response in terms of complex shear modulus (G), rutting factor (G/sin), R, and J compared to the 4%GF and 12%GF at different temperatures. Another interesting finding is that GF’s use in the hybrid binder (2%SBS + 8%GF) led to a significant increase in the shear complex modulus and a decrease in the phase angle compared to the binder modified with 2%SBS. The geopolymer decreased the binder’s sensitivity to temperature for both unaged and RTFO asphalt binders. The hybrid binder would also improve strain recovery under high stress and temperatures and the ability to withstand severe traffic loads. Furthermore, there is a crucial relationship between temperature and J, which could help asphalt pavement designers select suitable modifiers considering the local climate and traffic volume.

Evaluating Impact of Corrected Optimum Asphalt Content and Benchmarking Cracking Resistance of Georgia Mixtures for Balanced Mix Design Implementation

The Georgia Department of Transportation (GDOT) implemented the corrected optimum asphalt content (COAC) approach to reducing the allowable reclaimed asphalt pavement (RAP) binder contribution for improving mixture durability. The COAC of 60:40 implemented in 2019 allows 60% of the RAP binder to be credited to the total mix, requiring additional virgin asphalt binder equivalent to 40% of the RAP binder to be added to the volumetric optimum binder content. To further enhance the durability of asphalt mixtures, GDOT plans to implement the indirect tensile asphalt cracking test (IDEAL-CT) in the balanced mix design (BMD) method in conjunction with the Hamburg wheel tracking test that is currently specified in the GDOT specifications. To assist GDOT in the implementation effort, this study was conducted to (1) evaluate the effect of the COAC approach on the cracking and rutting resistance of asphalt mixtures using the proposed BMD test methods; and (2) benchmark the cracking resistance (i.e., CTindex) of plant-produced mixtures being produced in the state of Georgia for developing CTindex thresholds for future implementation. The results of this study suggest that the 60:40 COAC helps improve the cracking resistance of asphalt mixtures containing high RAP contents with minimum effect on their rutting resistance when compared with the corresponding virgin mixtures. In addition, because of statistical differences in the CTindex results between stone mastic asphalt (SMA), surface, and intermediate/base mixtures tested in this study, different CTindex thresholds are proposed for these three mixture groups for pilot projects. Further research is anticipated to refine these thresholds and verify with field performance for future implementation in mix design approval and acceptance testing.

Investigate the use of recycled polyvinyl chloride (PVC) particles in improving the mechanical properties of stone mastic asphalt (SMA)

Every year, millions of tons of industrial waste and household waste, including plastic waste, cause damage to the environment through landfilling, incineration, or dumping in open water. Polyvinyl chloride (PVC) is one of the most broadly used plastic materials in the modern world today, which can be reused in various industries by recycling waste. This matter can significantly help to improve environmental health. In this study, the impact of two kinds of recycled PVC (recycled water pipes and recycled candy wrappers) with three various percentages (2%, 3.5%, and 5% by weight of bitumen) on improving the mechanical properties of stone mastic asphalt (SMA) mixture has been investigated. For this purpose, in the present research, the Static creep test, Deformation strength test (Kim Test), Skid resistance test, indirect tensile strength (ITS) test, Semi-circular bending (SCB) fracture test, and conventional bitumen tests have been used. The conventional bitumen tests indicated that recycled PVC materials increased the softening point, viscosity, and specific gravity and reduced the penetration and the ductility of bitumen. Also, the results of mechanical tests illustrated that the addition of recycled water pipe particles and recycled candy wrapper particles improved the indirect tensile strength and increased the moisture resistance in stone mastic asphalt. However, increasing the percentage of these recycled materials to the asphalt mix had a negative effect on skid resistance. Regarding these recycled material's effects on rutting resistance, the Kim test depicted that raising the percentage of these recycled additives increases the rutting resistance of asphalt mixtures at high temperatures. Also, the static creep test revealed that the addition of these recycled PVCs reduces the accumulated permanent axial strain and increases the creep stiffness of stone mastic asphalt mixture. Moreover, based on the results of the fracture test, the addition of recycled PVC particles to the stone mastic asphalt mixture has a positive effect on the fracture energy at intermediate temperatures and intensity factor (Keff) at sub-zero temperature. Finally, in a general conclusion, it can be stated that recycled water pipe additive has a more notable influence on the mechanical properties of SMA mixture than recycled candy wrapper additive.