Waste Tire Rubber Powder Research Articles

Study on the Performance of Modified Qingchuan Rock/Rubber Asphalt

This paper developed a new environmentally friendly composite modified asphalt material and studied the composite modification of Qingchuan rock asphalt (QRA) and waste tire rubber powder (RP) was studied in this paper. QRA/RP composite modified asphalt was prepared by adding these two materials as modifiers into matrix asphalt and compared with matrix asphalt and QRA modified asphalt. The basic properties of asphalt before and after aging were evaluated by the rotating thin film oven test. The high-temperature performance and permanent deformation resistance at different temperatures and frequencies were analyzed by the dynamic shear rheological test. The bending creep stiffness test was used to evaluate the low-temperature performance. In addition, the microstructure and modification mechanism of composite-modified asphalt were analyzed by scanning electron microscopy and infrared spectroscopy. The results show that QRA-modified asphalt is superior to matrix asphalt in terms of mass loss, viscosity ratio, and residual penetration, while QRA/RP composite-modified asphalt is further improved on this basis, QRA/RP composite modified asphalt can effectively improve the high and low temperature performance of asphalt.. Although the addition of RP is mainly based on physical modification, it also causes weak chemical reactions and enhances the adhesion of asphalt. The interaction between Qingchuan Rock asphalt and rubber powder significantly improves the overall stability of asphalt structure.

Enhancing the Storage Stability and Rutting Resistance of Modified Asphalt through Surface Functionalization of Waste Tire Rubber Powder

Waste tire rubber powder-modified asphalt (RMA) has been widely used in road construction, which was traditionally limited by the poor compatibility of RMA, affecting pavement performance. By synthesizing epoxy soybean oil with amide groups (ESO/TETA) and grafting it onto desulfurized rubber powder (DCR) through microwave irradiation, a surface-functionalized rubber powder (MDCR) was produced successfully. The effects of the physical properties, storage stability, thermal stability, and rheological behavior of the modified asphalt were studied. The results show that the MDCR with a polar surface improved the compatibility and adhesive interactions between the modified crumb rubber and the asphalt. The MDCR content could reach 50%, and the phase separation could meet the requirements of 2.2 °C, which has application conditions in engineering for stable storage. Additionally, the inclusion of MDCR in the asphalt formulations significantly mitigated the temperature sensitivity of the modified asphalt. Importantly, when the MDCR constituted from 20% to 50% of the asphalt, there was a noted reduction in the phase angle at temperatures above 70 °C, indicating a significant improvement in the elastic efficiency. The MDCR also led to substantial enhancements in the resistance of the asphalt to high-temperature and high-stress rutting, addressing the crucial limitations in the consumption ability of waste tire rubber powder and improving the overall performance of RMA in pavement applications.

THE EFFECT OF ADDING WASTE TIRE RUBBER POWDER ON PAVING BLOCK WEAR

Pavement using paving blocks is the right choice because of its easy installation and maintenance. One form is a quadrilateral type that is widely used for environmental and pedestrian roads. With good road access being one of the improvements in vehicles so that waste tires also increase, solutions are needed to reduce the impact on the environment but are also expected to provide benefits for paving block roads, especially increasing adhesion between paving block constituent materials. Based on this background, it was a research idea with the aim of determining the effect of adding waste tire rubber powder on the wear resistance of paving blocks. Research method with strength testing on paving block samples with a size of 5 cm x 5 cm x 2 cm a total of 18 samples. The results showed the average strength value of paving blocks with a mixture of waste tire rubber of 1%, 2%, 3%, 4%, 5% of 0.134, 0.223.0235, 0.246 and 0.247 mm / minute, so that the addition of waste tire rubber powder showed a decrease in the wear rate of paving blocks.

Enhancing permeability and mechanical properties of rubber cement-based materials through surface modification of waste tire rubber powder

In this study, the authors present a detailed investigation into the surface mineralization of recycled rubber powder (RP) to enhance its performance in cement mortars. A modified rubber, referred to as RTC, is produced by employing a straightforward and efficient method involving the deposition of tannic acid (TA) and calcium carbonate (CaCO3, <5 μm) on the surface of RP. The main objective of this research is to elucidate the impact of RTC on the impermeability, mechanical properties, and pore structure of rubberized mortar. Through a comprehensive set of characterizations and tests, we demonstrate the successful deposition of TA and CaCO3 on the RP surface, resulting in RTC with excellent chemical activity and hydrophilicity, while also providing nucleation sites for hydration products. This modification process facilitated improved interfacial affinity with cement paste, enhancing bonding between rubber and cement paste. Remarkably, the incorporation of rubber into mortars with markedly enhanced resistance to permeation, with RTC mortars demonstrating particularly noticeable improvement. The marginal decrease in density in comparison to conventional mortars arises from the rubber's lightweight properties. Moreover, rubber exerts a minor adverse influence on hydration kinetics, yet this detrimental impact is alleviated in mortars incorporating RTC. Notably, the study elucidates the nuanced changes in porosity induced by rubber incorporation, underscoring its influence on the mechanical performance of rubberized cement mortars. The RTC5 mortar with a 5% content demonstrates the most remarkable enhancement compared to RP5 mortar. Overall, this study highlights the potential of surface mineralization of RP as a promising approach for improving the performance of rubberized cement mortars.

Energy assessments of concrete incorporating waste tire rubber and waste brick powder: A comparative analysis of various concrete grades

Some non-conventional concrete mixes are a new generation of concrete characterised by reduced energy requirements during their production. Compared with conventional concrete, some non-conventional concrete mixes incorporating waste materials have reduced energy requirements due to their excellent abilities in constraining high energy requirement values of conventional concrete ingredients. Despite several studies on energy requirement of non-conventional concrete, the underlying reduction of energy requirement of concrete containing waste tire rubber (WTR) and waste brick powder (WBP) is not completely understood due to the absence of appropriate studies in this area. In this study, the energy requirements of control and non-conventional concrete mixes among various concrete grades (20 MPa, 25 MPa and 30 MPa) are developed in conjunction with the compressive strength results of concrete, to generate eco-concrete mixes with reduced energy requirements and considerable strength performances. The results indicate that inclusion of WTR and WBP in concrete reduces the energy consumption of concrete. It is shown that the choice of amounts of WTR and WBP in concrete should not only be based on the drive to reduce energy consumption, but also the motivation to avoid substantial reduction in concrete compressive strength. For all concrete grades, the reductions in compressive strength of 5P20T mixes (5 % WBP and 20 % WTR) need to be greater than 32.57 % compared with 0P0T mixes, to achieve concrete energy requirement reductions of less than 5.56 %. Moreover, the reductions in energy requirements of concrete for 5P10T mixes are nearly 5 % for all concrete grades, with reductions in compressive strength being in the range of 11.67 % – 16.87 %. The study establishes that 5P10T concrete mixes provide a route for reductions in energy requirement of concrete without substantial reductions in compressive strength. These results therefore imply the exciting possibility that the energy requirement of concrete can be tailored by controlling the replacement levels of conventional concrete ingredients.

Durability Improvement of Pumice Lightweight Aggregate Concrete by Incorporating Modified Rubber Powder with Sodium Silicate.

To improve the durability of pumice lightweight aggregate concrete applied in cold and drought areas, sodium silicate-modified waste tire rubber powder is used to treat the pumice lightweight aggregate concrete. The pumice lightweight aggregate concrete studied is mainly used in river lining structures. It will be eroded by water flow and the impact of ice and other injuries, resulting in reduced durability, and the addition of modified rubber will reduce the damage. The durability, including mass loss rate and relative dynamic elastic modulus of pumice lightweight aggregate concrete with different sodium silicate dosages and rubber power particle sizes, is analyzed under freeze-thaw cycles, and the microstructure is further characterized by using microscopic test methods such as nuclear magnetic resonance tests, ultra-depth 3D microscope tests, and scanning electron microscopy tests. The results showed that the durability of pumice lightweight aggregate concrete is significantly improved by the addition of modified waste tire rubber powder, and the optimum durability is achieved when using 2 wt% sodium silicate modified rubber power with a particle size of 20, and then the mass loss rate decreased from 4.54% to 0.77% and the relative dynamic elastic modulus increased from 50.34% to 64.87% after 300 freeze-thaw cycles compared with other samples. The scanning electron microscopy test result showed that the surface of rubber power is cleaner after the modification of sodium silicate, so the bonding ability between rubber power and cement hydration products is improved, which further improved the durability of concrete under the freeze-thaw cycle. The results of the nuclear magnetic resonance test showed that the pore area increased with the number of freeze-thaw cycles, and the small pores gradually evolved into large pores. The effect of sodium silicate on the modification of rubber power with different particle sizes is different. After the treatment of 2 wt% sodium silicate, the relationship between the increased rate of pore area and the number of freezing-thawing cycles is 23.8/times for the pumice lightweight aggregate concrete containing rubber power with a particle size of 20 and 35.3/times for the pumice lightweight aggregate concrete containing a particle size of 80 rubber power, respectively.

Comprehensive Characterization of Waste Tire Rubber Powder

Comprehensive Characterization of Waste Tire Rubber Powder

Anti-deformation performance of asphalt modified by carbon black extracted from waste cooking oil pyrolysis waste tires rubber

As a promising renewable resource, waste tire rubber powder has been utilized to enhance asphalt performance but it has compatibility concerns with matrix asphalt. To solve the phase separation between crumb tire rubber (CTR) and asphalt, waste cooking oil (WCO) has been successfully employed as the solvent to desulfurize crumb rubber. However, about 30 % of carbon black is wrapped in crumb rubber, which has a high recycling value. The cross-linking network structure of the crumb rubber can be loosened by waste cooking oil, and the carbon black will gradually peel off. This study desulfurizes crumb rubber with waste cooking oil at 180 ℃, and the carbon black produced by the evolution of rubber structure was separated by Soxhlet extraction. The rubber-cracked carbon black (RCCB) and the industrial carbon black N330 were added to asphalt, and the impact of the two different carbon black on the anti-deformation of asphalt was analyzed by dynamic shear rheometer (DSR). The results indicated that at the same dosage of 5 %, the carbon black separated from rubber will weaken the deformation resistance of asphalt at high temperatures, rather than improving it like N330 produced in the industry.

Identification of patterns of strength formation of concrete using cement Portland Pozzolan (PPC) and waste tire powder in the condition of seawater curing

According to the national standard body in Indonesia, the compressive strength of 20 MPa concrete is medium quality concrete. Medium-strength concrete is usually used for floors, light construction, houses, warehouse factories, and sidewalks. The use of medium-strength concrete is very broad, it is necessary to continuously conduct research to produce new innovations. Previous research on the utilization of waste rubber tires has been carried out. Research on the development of concrete with the use of waste tire rubber powder is very interesting to do considering the waste of used tires that continues to increase along with the increase in the number of motorized vehicles in Indonesia. Portland Cement (OPC) and Portland Pozzolan Cement (PPC) are the two types that will be used in this research to see its effect on concrete with waste rubber powder. These two cements also have different corrosion resistance. And seawater is one of the triggers of high concrete corrosion. Research on the development of concrete with the use of waste tire rubber powder is very interesting to do considering the waste of used tires that continues to increase along with the increase in the number of motorized vehicles in Indonesia. Portland Cement (OPC) and Portland Pozzolan Cement (PPC) are the two types that will be used in this research to see its effect on concrete with waste rubber powder. These two cements also have different corrosion resistance. And seawater is one of the triggers of high concrete corrosion. This study aims to analyze how the compressive strength of PPC concrete compares with OPC and the addition of used tire powder under seawater treatment conditions. Six concrete variants were made and then tested for compressive strength. The compressive strength values of variants 1 to 6 were obtained as 20.78 MPa, 18.26 MPa, 19.56 MPa, 16.58 MPa, 13.03 MPa. The results show that tile powder is not effective in increasing construction strength, but the use of PPC cement is more effective than the use of OPC in improving construction, especially for cement use in buildings close to sea water

Penetration resistance and damage characteristics of cementitious mortar with partially replaced waste tire rubber as a filler against high-speed impact loading

Concrete, as the sole construction material, demonstrates an inadequate performance against high-speed impact loading. Resistance to such loading can be increased by adding rubber from the waste tire industry. In this study, the performances of cementitious mortar with the addition of waste tire rubber (WTR) powder were investigated against the strike of a high-speed projectile. By setting the target flow above 110 % and air content within a range of 5–7%, mortar with 30 % WTR was selected for high-speed impact test. Selected mortar specimens demonstrated significantly high resistance to damage and penetration against a high-speed projectile at impact speeds of 300 m/s and 420 m/s. Further, an experimental study revealed the contrasting behaviour of mortar specimens with WTR powder from that of conventional specimens, where typical compression occurred due to triaxial stress at the tunnel circumference formed by the intrusion of the projectile. Recommendation is made for composite mortar containing a less-stiff material such as rubber for new variables to be defined in the existing formulae, to quantify penetration in high-speed loading; given that the penetration resistance of specimens with 30 % WTR was larger than that of the control specimen, even with its lower compression strength.

A functionalized waste tire rubber powders for mitigating leaching of heavy metal ions and enhancing photocatalytic properties of rubberized cement mortar

In this study, waste tire rubber powder (R) was subjected to modification using tannic acid (TA) and ZnO to produce R-TA-ZnO composites, aiming to enhance the immobilization of heavy metal ions and improve the photocatalytic properties of rubberized cement-based materials. The characterization of R-TA-ZnO was conducted using a comprehensive range of analytical techniques, including Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible-diffuse reflectance spectroscopy (UV–Vis-DRS), and other relevant methods. The findings of the study revealed that R-TA-ZnO exhibited notable hydrophilicity, surface activity, and photocatalytic properties, resulting in effective containment of the leaching of heavy metal ions. FTIR and XRD analyses confirmed the retardation of R and R-TA-ZnO. Nevertheless, the strength of the rubberized cement mortar with 5% R-TA-ZnO exceeds that of the rubberized cement mortar with 5% R (28 days) due to the interfacial bonding. The SEM and X-ray Computed Tomography (XCT) results of the rubberized cement mortar indicated that R-TA-ZnO exhibited strong binding to the cement paste, reducing both the number and size of pores. However, a high concentration of R-TA-ZnO led to the formation of larger pores, which did not contribute to the reduction of porosity. Furthermore, the rubberized mortar incorporating R-TA-ZnO displayed remarkable photocatalytic capabilities. The results of the 5-cycle degradation experiments and microscopic characterization confirmed its exceptional structural stability and reusability.

Fabrication of composite aerogels from waste tires and fly ash for thermal and acoustic insulation applications

Recently, extensive research has been conducted on composite aerogel materials fabricated using industrial waste sources. These aerogels can not only help solve the most challenging environmental issues brought on by waste streams, but are also materials with excellent properties for thermal and acoustic insulation applications. This study, therefore, focuses on synthesizing composite aerogel using waste tire rubber powder and fly ash attained from power plants in a simple and environmentally friendly manner. The results show that the composite aerogel has a very low density (0.055- 0.079 g/cm3), a porosity of up to 96.57%, low thermal conductivity (0.022-0.039 W/m.K), an adequate noise reduction number (NRC) (0.41 at 250-4000 Hz) and high compressive Young’s modulus (120.5 kPa). These properties show the high potential of the material for thermal and sound insulation of buildings. Especially in the context of utilizing a reasonably priced source of waste material.

Recycle of waste tire rubber powder in a novel asphalt rubber pellets for asphalt performance enhancement

Asphalt rubber has been considered as an ideal road construction material due to its excellent rutting resistance, fatigue performance, crack resistance, and noise reduction functions. However, the preparation of asphalt rubber requires special equipment and takes higher cost. In this paper, a kind of asphalt rubber modifier pellets (ARP) that can be directly injected was prepared using a screw extruder, so as to simplify the production process and reduce equipment energy consumption during the synthesis of asphalt rubber. Industrial modifier PelletPAVE as control group, firstly, scanning electron microscopy (SEM) was employed to examine the internal microstructure of the two types of modifier pellets, and the storability were further evaluated. The rotational viscosity, High and low temperature rheological behaviors and fatigue properties of asphalt with two modifier pellets were investigated by rotational viscometer, dynamic shear rheometer (DSR), and bending beam rheometer (BBR), respectively. Finally, Infrared spectroscopy was used to explore the mechanism of modification. The findings revealed that 50% crumb rubber, 40% asphalt, and 10% calcium hydroxide are the optimal material compositions for preparing asphalt rubber pellets. The modifier particles coated with anti-sticking agent can achieve the same storability as PelletPAVE. The viscosity of the modifier pellets modified asphalt prepared is marginally higher than that of the PelletPAVE modified asphalt. Incorporating modifier pellets to asphalt demonstrates superior fatigue and crack resistance than PelletPAVE, as well as lower high temperature performance. Action mechanism of modified asphalt with both types of modifier pellets is regarded as a physical process. The asphalt rubber pellets prepared in this study reveal the merits of easy transportation, convenient direct injection, and wide application field.

Optimized Performance Design of Low Freezing Point Asphalt Mixture for Northern Mountainous Areas

Due to the lack of research on the applicability and optimization design of low freezing point asphalt mixtures in specific environments, especially for the harsh environments of low freezing point asphalt mixtures in mountainous areas during cold winter and high humidity in other seasons, there is a significant engineering demand. This paper carries out a study on the performance optimization design of low freezing point asphalt mixtures in northern mountainous areas. Through comparative analysis of low freezing point asphalt mixture technologies and analysis of the road performance of low freezing point asphalt mixtures, combined with the climate and driving characteristics of northern mountainous areas, the low freezing point asphalt mixture suitable for northern mountainous areas is selected. The research shows that the hygroscopicity of M low freezing point filler is significantly stronger than that of Z low freezing point filler, and since the humidity in northern mountainous areas is relatively high, selecting low freezing point fillers with lower hygroscopicity to prepare low freezing point asphalt mixtures can avoid safety accidents caused by excessively wet road surfaces. SBS modified asphalt and waste tire rubber powder modified asphalt can both produce low freezing point asphalt mixtures that meet the requirements of standard road performance, and both have good high and low temperature performance. When conditions permit, waste tire rubber powder modified asphalt low freezing point asphalt mixture is recommended as the first choice.

Influence of waste tire rubber powder, polypropylene fiber and their binary blends on mitigating alkali-silica reaction

This work aims to investigate the inhibitory effect and inhibitory mechanism of waste tire rubber powder (abbreviated as WRP) and polypropylene fiber (PPF), and their binary blends on mitigating the alkali-silica reaction (ASR). To achieve this, mortar bars containing either WRP, PPF, or WRP + PPF were prepared for the accelerated mortar bar test (AMBT). The mechanism of ASR inhibition was illustrated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray computed micro-tomography (X-ray CT). The results indicated that the combination of WRP and PPF showed excellent synergistic effect on improving the compressive strength of the mortar cubes. In addition, WRP could effectively alleviate ASR, but the effect depended on the particle size of WRP, with the inhibition effect of 120 mesh WRP being the best. The addition of WRP + PPF exhibited an excellent synergistic effect on the inhibition of ASR expansion, and 120 mesh WRP and PPF with a length of 9 mm and a dosage of 0.8 kg/mm3 showed the best inhibition effect when they were incorporated together. Moreover, the inhibition mechanism of WRP and PPF on ASR was physical effect: WRP consumed the swelling energy generated by water absorption of the gel through deformation, and PPF applied its own bridging effect to suppress crack propagation. Finally, the analysis of the X-ray CT scanning results showed that adding WRP and PPF to the slurry increased the porosity. With the progress of ASR, the gel filled the pores and decreased the expansion. This further revealed more about how WRP and PPF could work together to reduce the damage caused by ASR effectively.

High-value recycling of waste tire rubber powder by wet mixing method

Producing waste rubber into powder and adding it to rubber products as filler is one of the most direct and valuable methods to recover waste rubber. However, weak interface adhesion between waste rubber powder and rubber matrix severely damages the properties of rubber composites. To solve this problem, we propose a method of filling waterjet-produced rubber powder (WPRP) in natural rubber (NR) matrix via a wet mixing process. The characterizations of WPRP, the wet mixing mechanism participated by WPRP, and the properties of the wet-mixing rubber composites are carefully investigated. The surface of WPRP is irregular and contains some hydroxyl groups generated by the cavitation effect of waterjet, which endows the WPRP surface with certain hydrophilicity. The hydrophilic groups enable the stable suspension and uniform distribution of WPRP in latex. The active and irregular surface accelerates the flocculation during high-speed shear mixing, promotes the entanglement of NR molecular chains with WPRP, and forms a network between WPRP and NR matrix, which improves the dispersion of carbon black. When adding 5 parts per hundred rubber (phr) of WPRP, the tensile strength and elongation at break of the rubber composites are 27.8 MPa and 614.1%, respectively, which are even better than those of pure NR. When adding 10 phr of WPRP, the tensile strength and elongation at break of the rubber composite maintain 97.6% and 96.2% of that without WPRPs, respectively. Additionally, the addition of WPRP can reduce the rolling resistance of the rubber composites. This method will allow more waste rubbers to be incorporated into high-value rubber products, thereby relieving environmental pressure and realizing the recycling of rubber materials.

Compressive Toughness Loss Rate and Softening Characteristic Analysis of Pasture Fiber-Rubber Powder Concrete

To develop the utilization of pasture fibers and waste tire rubber powder, the effect of different blending levels of modified pasture fibers (2 kg/m3, 3 kg/m3, and 4 kg/m3) on the loss rate of compressive toughness and softening characteristics of rubber powder concrete was studied. In addition, RapidAir457 system imaging analysis and microscopic electron microscope photo analysis were carried out to analyze the distribution pattern of modified pasture fibers and rubber powder in concrete. The results show that the peak load of concrete is higher than other pasture fiber dosing test groups when 3 kg/m3 is incorporated in 20 mesh and 60 mesh rubber powder. With the increase of pasture fiber content, the compressive toughness loss of MC60 group and MC80 group increased first and then decreased. The softening curve analysis showed that MC-3 was more capable of absorbing damage energy in the strain range of 0.0005–0.0009 than the MC-2 group. According to the RapidAir457 system imaging analysis, the pasture fibers form a web-like organization inside the concrete when the pasture fiber is mixed at 3 kg/m3.

Pengaruh Serbuk Karet dari Ban Bekas sebagai Bahan Tambah Aspal Pen 60/70 pada Karakteristik Campuran Aspal Porus yang Menggunakan Agregat dari Loli Kota Palu

The use of waste crumb rubber tire as an additive in asphalt has been widely practiced in several countries in the world, which aims to improve the characteristics of asphalt mixtures such as porous asphalt. The purpose of this study was to determine the effect of used waste tire rubber powder as an additive in asphalt on the characteristics of porous asphalt mixture using aggregate from stone crusher machine in Loli, Palu city, Central Sulawesi Province. This research was conducted at the Transportation and Highway Laboratory, Tadulako University.This research used several percentages of used waste crumb rubber tire as follows: 0.025%, 0.050%, 0.075%, 0.10% of the aggregate weight in the mixtures (1200 grams). Aggregate composition determination in mixture using Method by sieve. Optimum Asphalt Content determination using Marshall Method. The results of this research found that the Stability and density value of the mixtures tend to increase at the content of 0.025% - 0,075% used waste crumb rubber tire. The results also found that the maximum stability and maximum density were reached at the Optimum Asphalt Content and the used waste crumb rubber tires content were 0.58% and 0.075%.

Study on the strength mechanism of red clay improved by waste tire rubber powder

The objective of this research is to improve the strength characteristics of red clay as a subgrade filler and increase the stability of subgrade engineering. During the laboratory tests, different amounts of waste tire rubber powder were added to the red clay. This study aims to identify the optimal amount of rubber powder required to improve the strength characteristics of red clay using a triaxial test and Duncan–Chang model. Using the depth of a field microscope, the apparent morphology of red clay and modified red clay was analyzed, and the pore variation of plain red clay and rubber powder modified red clay was described using a mercury intrusion test(MIP). The experimental results indicate that the asymptotic value of the main stress difference is significantly higher than the other four admixtures at 3%. The 3D surface comparison chart indicates that the addition of rubber powder significantly increases the relatively flat area range while reducing the overall area range. According to the comparison of porosity and contact area ratio, RPA1 is larger than RPA2, and RCA1 is smaller than RCA2. According to the characteristics of BJH pore size distribution, modified red clay has a higher pore fractal dimension than pure red clay.

Performance Evaluation of Asphalt Modified with Steel Slag Powder and Waste Tire Rubber Compounds

As two kinds of solid wastes, waste tires and steel slag have caused serious threats to the environment. Both waste tire rubber (WTR) and steel slag powder (SSP) can improve the performance of asphalt, while the performance indexes and modification mechanism of modified asphalt are not clear. In this paper, asphalt modified with SSP and WTR was prepared, and its performance was evaluated. The physical properties of asphalt modified with SSP and WTR, including penetration, the softening point, and viscosity, were investigated. Furthermore, high-temperature performance, fatigue resistance, low-temperature performance, and blending mechanism of asphalt modified with SSP and WTR were tested with a dynamic shear rheometer (DSR), bending beam rheometer (BBR), and Fourier transform infrared spectrometer (FTIR). The results showed that with the same content of WTR and SSP, WTR reveals a more significant modification effect on physical properties, fatigue, and low-temperature performance of base asphalt than SSP. The anti-rutting performance of SSP-modified asphalt is better than that of WTR-modified asphalt at 30~42 °C, and the anti-rutting performance of WTR-modified asphalt is better than that of SSP-modified asphalt at 42~80 °C. When the total content of WTR and SSP is the same, the physical properties, high-temperature resistance, fatigue resistance, and low-temperature performance of the asphalt modified with WTR and SSP decrease with the decrease in the ratio of WTR and SSP, and their performance is between WTR-modified asphalt and SSP-modified asphalt. Infrared spectrum results verified that the preparation of WTR- and SSP-modified asphalt is mainly a physical blending process. Overall, this research is conducive to promoting the application of modified asphalt with WTR and SSP in the construction of high-standard pavement.