Tire Powder Research Articles

Automated repair of asphalt pavement cracks and potholes utilizing 3D printing and LiDAR scanning

This study introduces a method for automatic repair of asphalt pavement cracks and potholes using 3D printing and LiDAR scanning. A scanning method was developed to accurately detect and represent cracks and potholes in a 3D model. To address the limitations of LiDAR scanning, such as missing data points caused by the irregular shapes of cracks and potholes, the screened Poisson method was applied to reconstruct the missing data points. These models were validated through both theoretical calculations and sand test. In addition, the research focuses on optimizing key 3D printing parameters, such as printing temperature and printing speed, to enhance performance of crack repair throughout semi-circular bending test. Direct tensile strength test was employed to assess the impact of waste materials (e.g., rubber tire powder and waste glass) on the bond strength of filled sample. The results indicated a volume difference of 2–5 % between the scanning method and the sand test method, demonstrating high accuracy in detecting and reconstructing 3D cracks/potholes. Binders modified with 10 % rubber tire powder, or 20 % waste glass exhibited the highest tensile strength of 212 kPa and 207 kPa, respectively. However, using more than 30 % waste materials is not recommended due to a significant reduction in bond strength compared to conventional binders. An optimal 3D printing speed of 180 mm/min and a temperature of 117 °C are recommended for use in 3D printing in laboratory conditions. It was also noted that higher printing speeds decrease indirect tensile strength, highlighting the importance of balanced parameter settings.

Enhancing clayey soil performance with lime and waste rubber tyre powder: Mechanical, microstructural, and statistical analysis

Nowadays, for soil stabilisation and cleaner production of geo-composites, the possibility of utilizing waste rubber is in vogue. The present paper deals with experimentally investigating the mechanical and micro-structural characteristics of weak Indian clayey soil partially substituted with lime (0–3.5%) and waste rubber tyre powder (0–15%). It was observed that, with increasing lime and rubber powder content, the plasticity index of the soil decreases. The shear strength and compaction testing results reveal that adding lime and rubber tyre powder (RTP) enhances the geotechnical performance of clayey soil up to an optimum dosage value. Also, the tri-axial shear testing was performed to obtain stress-strain curves for all considered soil mixes. For modified clayey soil containing 3% lime and 12.5% rubber powder, the cohesion values and bearing capacities improved phenomenally by 36.1% and 88.6% respectively, when compared to clayey soil. Further for this mix, SEM analysis reveals a compacted microstructure which improves dry-density and California's bearing ratio among all modified mixes. The novel co-relations upon regression analysis are found able to predict plasticity index, dry density, bearing capacity and shear strength with higher confidence levels. Overall, the cost-benefit analysis worked out to obtain the optimum cost of construction of footings and flexible pavement shows cost deductions up to 19% and 39% respectively while utilizing modified clay soil mixes containing 3% lime and 12.5% rubber powder in subgrade, ultimately making production stronger, cheaper and environment friendly.

Experimental investigation on reuse of dredged soils improved using waste rubber tyre powder (WRTP) and cement as admixtures

ABSTRACT Dredged soils possessing low-bearing capacity and high compressibility were tested incorporating waste rubber tyre powder (WRTP) at varying percentages in increments of 1.5% up to 15% by dry weight of the soil and 2% cement. It was observed that maximum dry unit weight (MDUW) decreased to 11.75 and 12 kN/m3 for combinations of 15% WRTP and 15% WRTP + 2% cement respectively. Direct shear test (DST) parameter ‘c’ at 4.5% WRTP and 2% cement increased from 44 to 49 kN/m2 whereas angle of internal friction, ‘ϕ’ showed an increase up to 37°. The Unconfined compressive strength (UCS) of soil-WRTP-cement mixture enhanced from 110 kN/m2 in the untreated state to 596 kN/m2 at 28 days curing and 6% WRTP + 2% cement. Further, California bearing ratio (CBR) values increased up to an optimum addition of 6% WRTP + 2% cement, both in unsoaked (6 to 13%) and soaked condition (2 to 7%). Soil improvement using WRTP and cement can improve the strength and durability of road subgrades and embankments. WRTP in addition to cement can be used in locations with weak or problematic soils to improve load-bearing capacity and reduce settlement-related problems.

Technical and environmental assessment of tire powder injection as reducing fuel through blast furnace tuyeres

This paper shows the study of the utilization of tire as fuel to be employed into blast furnaces. This tire can substitute coal or even charcoal in the blast furnaces tuyeres. The injection into tuyeres, other than contribute for energy generation, can produce gas for metallic oxide reduction, the former charged into the blast furnace throat, thus contribution for using other forms of wastes. The tire, as powder, when to be injected into blast furnaces, contributes for an environmental employee of that waste, so as permit for obtaining a high value product. Then, one advantage of using such material is that it is waste and has lower cost for preparation. A comparative study of combustion index of pulverized tires and coals was studied. For this study are been utilized one physical model, with thermal gradient constructed at Escola de Minas-UFOP. The results obtained have showed that the tires have good combustibility, this was obtained in a model that simulate the same conditions occurring in the blast furnaces tuyeres; these results include tires and mixtures of tires with coal or even with charcoal.

Pemakaian Serbuk Ban Untuk Paving Blok Bentuk Heksagon (Segi Enam)

Paving blocks are one of the elements that are often found in building structures, because paving blocks are easy to print and maintain. Paving blocks mixed with tire powder have a light weight so that they do not overload the structure in building construction.This study aims to test the strength of paving blocks in the laboratory mixed with tire powder with a content of 0%, 5%, 10%, 20%, and 30% of the volume of sand. The paving blocks tested were hexagon-shaped. The results showed the same trend as shown by previous studies. The more tire powder content in the paving block, the shock strength of the paving block increases along with the addition of tire powder from 20 blows at 0% tire powder content to 58 blows at 30% tire powder content. Of the paving block shapes, hexagon-shaped paving blocks have better performance. The hexagon shape paving blocks produced in this study include quality B paving blocks in accordance with SNI 03-0691-1996 which can be used for parking lot and yard equipment.

CHEMICAL CHARACTERIZATION OF ECO-FRIENDLY RECOVERY METHOD FOR RUBBER FROM WASTE TIRES

Recycling of waste tires is the goal of many studies, where the chemical dissolution method depends on the recovery of tire rubber (TR) and carbon black (CB) from the waste tires. Petroleum ether was used to dissolve tire powder and a black solution was produced which after refluxed at 140°C for two hours with a mixture of adsorbents including silicon dioxide (SiO2) and aluminum oxide (Al2O3) and then filtered, will give clear rubber filtrate and CB precipitate and the used petroleum ether was totally regenerate. The rubber was recovered with a weight percentage of 24% (w/w), whereas CB was reclaimed with 20% (w/w) from the total waste tire used. The recovered rubber was characterized and its functional groups were studied by 1H-NMR and FTIR spectroscopy which shows the rubber is polyisoprene blended with polybutadiene. The XRD, FESEM, and thermal analyses (TGA, DTA, and DSC) show the recovered rubber is amorphous with an elastic nature, thermally stable with endothermic behavior, and contains some inorganic impurities. On the other hand, the BET (Brunauer-Emmett-Teller) analysis, of carbon black shows it is a mesoporous material with a high specific surface area (as = 149.44m2 . g -1 ) and pores with a mean diameter (13.623 nm). The particle size, structure and surface chemistry of the reclaimed CB which was measured accordingly by XRD, BET, and FESEM and it was emphasized that the CB has excellent adsorption qualities

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

Surface Treatments Applied to Waste Tire Powder and Review of the Use of Waste Tire Powder in Polymer/Original Rubber Compounds

Atık taşıt lastikleri malzemesi ve miktarı bakımından son derece değerli bir atık formudur. Atık lastiklerin geri kazanımında henüz sürdürülebilir ve verimli bir teknoloji geliştirilemediği için bu atığın değerlendirilmesi konusunda araştırmacılar çeşitli uygulamalara yönelmişlerdir. Bunlar arasında atık lastik tozlarının çeşitli malzeme bileşimlerine katılarak değerlendirilmesi önemli bir yer tutmaktadır. Bu uygulamalarda atık kauçuk tozunun katıldığı malzeme ile uyumunun kauçuğun yapısı gereği yeterince sağlanamadığı, bunun sonucunda malzeme özelliklerinin olumsuz etkilendiği görülmüştür. Kauçuk tozuna uygulanacak çeşitli yüzey işlemlerinin (yüzey modifikasyonu ve yüzey devulkanizasyonu) kauçuk tozu/matris uyumunu arttırdığına yönelik araştırmalar yoğun olarak sürdürülmektedir. Bu çalışmada, kauçuk tozuna uygulanan yüzey işlemleri detaylı olarak ele alınmış ve konuyla ilgili yapılan literatür çalışmaları incelenmiştir. Yapılan araştırmalar, kauçuk tozuna uygulanan yüzey işlemlerinin, tozun içine katıldığı malzeme ile uyumunu arttırdığını ortaya koymaktadır.

High-purity graphene and carbon nanohorns prepared by base-acid treated waste tires carbon via direct current arc plasma

As the accumulation of waste tires continues to rise year by year, effectively managing and recycling these discarded materials has become an urgent global challenge. Among various potential solutions, pyrolysis stands out due to its superior environmental compatibility and remarkable efficiency in transforming waste tires into valuable products. Thus, it is considered the most potential method for disposing these tires. In this work, waste tire powder is pyrolyzed at 560 °C to yield pyrolysis carbon black, and meanwhile, the purification effects of base-acid solutions on pyrolysis carbon black are discussed. High-purity few-layer graphene flakes and carbon nanohorns are synthesized by a direct current arc plasma with H2 and N2 as buffer gases and high-purity pyrolysis carbon black as raw material. Under an H2 atmosphere, hydrogen effectively terminates the suspended carbon bonds, preventing the formation of closed structures and facilitating the expansion of graphene sheets. During the preparation of carbon nanohorns, the nitrogen atoms rapidly bond with carbon atoms, forming essential C–N bonds. This nitrogen doping promotes the formation of carbon-based five-membered and seven-membered rings and makes the graphite lamellar change in the direction of towards negative curvature. Consequently, such change facilitates the formation of conical structures, ultimately yielding the coveted carbon nanohorns. This work not only provides an economical raw material for efficient large-scale synthesis of few-layer graphene and carbon nanohorns but also broadens the intrinsic worth of pyrolysis carbon black, which is beneficial to improving the recycling value of waste tires.

A novel epoxy adhesive with ground rubber tire powder and carboxylated multiwalled carbon nanotubes

AbstractThe present study was an attempt to improve the toughness, mechanical and adhesion properties, and thermal stability of a two‐phase epoxy DGEBA/Resole phenolic resin through the use of carboxyl‐modified multi‐walled carbon nanotubes (c‐MWCNTs) and ground rubber tire (GRT) powder. The effect of a hybrid reinforcement containing GRT and c‐MWCNT blend on the mechanical properties, thermal stability, and microstructure of the epoxy‐phenolic adhesive were evaluated by tensile test, TGA, and FESEM, respectively. The formulated adhesive was utilized in a lap joint metal to a composite in order to peruse the adhesion features, where the composite was an epoxy resin reinforced with carbon fibers and the metal was stainless steel 316 L. According to the tensile test, there were 32% rise in tensile strength, 27% rise in modulus, and a 64% rise in toughness with adding 0.5% wt c‐MWCNTs and 15 phr waste GRT powder to the epoxy‐phenolic matrix. Furthermore, adding 1% wt c‐MWCNTs of nanoparticles and GRT powder has resulted in a 15% increase in lap shear strength. It also can be seen that thermal stability for the formulated samples has experienced an upward trend compared to the neat epoxy composite.Highlights Epoxy adhesives based on GRT Powder, c‐MWCNTs particles and phenolic resin have been successfully prepared. The hybrid uses of GRT Powder and c‐MWCNTs particles can synergistically increase the tensile and lap shear strength The addition of c‐MWCNT nano particles and GRT Powder in an epoxy adhesive can have a dramatic rise in the toughness system compared to the neat epoxy adhesive. Maximum degradation temperature of the produced newly adhesive has increased considerably in contrast with the neat epoxy adhesive.

Enhancing thermal efficiency and durability of sintered clay bricks through incorporation of polymeric waste materials

This pioneering study investigates the use of expanded polystyrene (EPS) and waste rubber tyre powder (WRTP) in sintered clay bricks for eco-friendly and cleaner buildings. Different ratios of EPS and WRTP were mixed with clay and sintered at 1000 °C. Advanced material characterization techniques were used to evaluate the materials, and physical, mechanical, and durability tests were performed on the bricks. The findings show that higher doses of EPS and WRTP increased the bricks' thermal efficiency and reduced their weight. Brick specimens with 0.5% EPS dosage met the weathering resistance requirements, and those with 0.5% EPS dosage and 5% WRTP dosage met the minimum compressive strength standards. The study offers valuable insights into the potential applications of EPS and WRTP in producing clean and sustainable polymer waste bricks to improve brick performance and efficient waste management in the construction industry.

Compression and consolidation characteristics analysis of waste tire powder bed during gas pressurization

Pressurized conveying of waste tire powder was one of the key challenges in the feeding process. In this paper, the characteristics of powder bed compression behaviors during gas pressurization were studied by a visualization tank. Compared with the pulverized coal, the higher compressibility of waste tire powder bed revealed the serious consolidation problem in the high-pressure hopper. The source of bed consolidation was fluid dynamic force and constrained space. The intrusion probe was applied to the consolidation test of the compressed powder bed. The results showed that the gas pressurization enhanced the consolidation and the consolidation distribution existed along the axial direction. The maximum relative intrusion resistance was located at the compaction height of bed from 10.2 % to 22.2 %. This study was helpful in further optimizing the operation of pressurized conveying in the dry-fed gasification process of waste tire powder.

Durability of Polymer-Modified Asphalt Mixture with Wasted Tire Powder and Epoxy Resin under Tropical Climate Curing Conditions.

The quality of pavements in tropical climates is negatively affected by the frequent wet and dry cycles during the rainy season, as well as by issues related to overloading from heavy trucks and traffic congestion. Contributing to this deterioration are factors such as acid rainwater, heavy traffic oils, and municipal debris. In light of these challenges, this study aims to assess the viability of a polymer-modified asphalt concrete mixture. This study investigates the feasibility of a polymer-modified asphalt concrete mixture with the addition of 6% crumb rubber powder from waste car tires and 3% epoxy resin to counter the harsh conditions of tropical climate weather. The study involved subjecting test specimens to five to 10 cycles of contaminated water (100% rainwater + 10% used oil from trucks), curing for 12 h, and air drying in a chamber of 50 °C for 12 h to simulate critical curing conditions. The specimens underwent fundamental laboratory performance tests such as the indirect tensile strength test, dynamic modulus test, four points bending test, and Cantabro test, as well as the double load condition in the Hamburg wheel tracking test to determine the effectiveness of the proposed polymer-modified material in actual conditions. The test results confirmed that the simulated curing cycles had a critical impact on the durability of the specimens, with the greater curing cycles leading to a significant drop in the strength of the material. For example, the TSR ratio of the control mixture dropped from 90% to 83% and 76% after five and 10 curing cycles, respectively. Meanwhile, the modified mixture showed a decrease from 93% to 88% and 85% under the same conditions. The test results revealed that the effectiveness of the modified mixture outperformed the conventional condition in all tests, with a more prominent impact observed under overload conditions. Under double conditions in the Hamburg wheel tracking test and a curing condition of 10 cycles, the maximum deformation of the control mixture sharply increased from 6.91 to 22.7 mm, whereas the modified mixture increased from 5.21 to 12.4 mm. Overall, the test results confirm the durability of the polymer-modified asphalt concrete mixture under harsh tropical climate conditions, promoting its application for sustainable pavements, especially in Southeast Asian countries.

Air-conditioning cost savings, CO2 emission benefits and return on investment by using waste in porotherm bricks in hot-arid and warm-temperate climates

Building energy consumption has dramatically increased globally during the last few decades. This energy is primarily utilized to keep air-conditioned buildings at a comfortable temperature. As the worldwide demand for energy increases, net-zero or green buildings will undoubtedly become more and more crucial to address challenges related to climate change. It is well-known in this regard that the use of thermal insulation materials inside the building can contribute with temperature management and thermal comfort by preventing heat transmission. The present study examines the thermo-economic aspects of porotherm blocks filled with discarded insulations. Six different types of insulation were therefore investigated, and each was inserted into the porotherm brick cavities, including plastic powder, tire powder, cloth powder, leather powder, rockwool, and coconut pith. The effects of these newly developed brick configurations on air-conditioning costs, carbon dioxide emissions and payback time are compared to those of conventional porotherm blocks and burnt clay bricks. Thermo-physical properties of the aforementioned insulating materials, as well as porotherm brick and burnt clay brick, were established by experimental analysis. The thermo-economic analysis was carried out based on the number of degree-hours of heating and cooling to determine the building's annual energy usage. The thermo-economic performance of insulation-stuffed porotherm bricks was evaluated in two locations in India with distinct climatic characteristics: (28.57° N 75.12° E) New Delhi (warm-temperate climate) and (28.00° N 73.30° E) Bikaner (hot-arid climate). The rockwool porotherm brick wall demonstrated the best results in terms of lower unsteady transmittance, greater air conditioning cost-savings, appropriate payback spans, and improved yearly carbon mitigation values of 0.29 W/m2K, 0.83 $/m2, 0.95 years, and 15.65 kg/kWh, respectively, in hot-dry climates.

Characterization of recycled end-of-life rubber tire filled with black slag

To date, discarded tires are reused in many applications, however, because of the enormous quantity decommissioned annually, it is essential to continue researching new recycling methods as well as applications to reduce waste and preserve new resources. In the present study, a simple recycling technology of end-of-life tire (ELT) powder is proposed, and the influence of steel slag as filler is assessed. Europe produces about 7 Mt of steel slag annually, and although most of it is reused as an artificial aggregate, about 15% is still landfilled. Also in the case of steel slag, the study of new applications is mandatory so that the combination of these two waste materials, in a 100% recycled composite fits across different industrial sectors facing the same environmental issue. It was found that the leaching of the slag incorporated in the rubber matrix is reduced and that the ELT powder recycled by this technology gives rise to a well-cohesive material. A good rubber-filler interaction was found by swelling test and differential scanning calorimetry (DSC) analysis. The slag reduces the friction coefficient and increases the thermal conductivity. The experimental results showed how some properties of recycled ELT can be improved by adding the steel slag.

Evaluation of a Modular Filter Concept to Reduce Microplastics and Other Solids from Urban Stormwater Runoff

This paper describes an innovative Decentralized Technical Sustainable Drainage System (SuDS) concept, which is based on technical devices, such as sieves, sedimentation barriers, floating barriers and a magnetic module, which addresses, mainly, the fine matter. The SuDS is designed as a retrofit system so that no costly and time-consuming conversion measures are necessary. Due to the possibility of free configurability of individual modules in the three levels, road, gully and drain, a novel solution approach is presented, which is not available on the market, for a reduction in solids in general and microplastics in particular. The retention performance of selected modules and their combinations is demonstrated by means of bench tests according to the test procedure of the German Institute for Construction Engineering (DIBt) for the evaluation of decentralized treatment systems. Four different rain intensities, from light to medium up to heavy rain, are charged to the filter modules. Collected and fractionated road-deposited sediment (RDS) was selected as the test substance (10 kg). Additional tests with tyre powder, PE pellets, cigarette butts and candy wrappers helped to make clear the filter process of the particulate matter. The retention performance was determined by the mass balance between the defined dosage and at the outlet. For this purpose, the total volume flow of the effluent was passed over a stainless-steel sieve with a diameter of 600 mm and a mesh size of 20 µm. For the test substance, RDS retention rates up to 97% were measured. Very fine matter, particularly, was technically challenging to obtain; <63 µm up to 66% could be retained by the filter modules. Modules in the road space, such as porous asphalt or additional retention spaces, in the area of the curb as well as direct infiltration in the road drainage shaft are theoretically described and discussed. The outlook also addresses the potential of an intelligent network to reduce the input of pollution from urban stormwater runoff.

Rheological Analysis of Bitumen Modified by Waste Tire Powder Pyrolytic Oil Residue

Rheological Analysis of Bitumen Modified by Waste Tire Powder Pyrolytic Oil Residue

Polymerized activating highly-dispersible waste tire powder for viscoelasticity regulation of modified asphalt at a lower mixing temperature

This work explored polymerization activating fine waste tire powder modified asphalt at a lower mixing temperature. Different from common temperatures of more than 190 °C, traditional waste tire powder could not achieve the excellent properties of modified asphalt at 170 °C. Through styrene and methyl methacrylate monomers polymerized on the surface of 400-mesh waste tire powder, polymerized waste tire powder was successfully fabricated through changes in morphology and surface potential. Polymerized waste tire powder modified asphalt was 15 wt%. It was determined by dynamic shear rheology and nanoindentation. The excellent dispersion of polymerized waste tire powder in asphalt was proved by fluorescence microscopy. Compared with waste tire powder modified asphalt, the hardness of polymerized waste tire powder modified asphalt decreased by 21.27 %, and the viscoelasticity decreased by 92.26 %. It indicated polymerized waste tire powder modified asphalt performed good hardness and viscoelasticity regulation. This work inspired a new idea for modified asphalt and reclaiming waste tires, which would have good economic and environmental benefits.

Experimental Investigation of the Fracture Properties for Crumb Rubber Modified (CRM) Asphalt Mixtures

Cracks that develop daily and seasonally due to the environmental or mechanical effects caused by axle loads, propagate over time and become an important type of distress in asphalt layers. This type of distress can significantly increase the maintenance and rehabilitation costs of pavements. The use of rubber powder or fine granules in certain proportions to the bitumen content can extend the life of the pavements and reduce the environmental problems caused by waste tire disposal. In this study, the fracture behavior of normal and rubber-modified asphalt mixtures was investigated in accordance with AASHTO TP105 by adding waste tire granules at the ratio of 20% by weight of bitumen to hot mix asphalt. It has been determined that when the waste tire powders are added to the hot mix asphalt by replacing 20% of the bitumen weight, coatings with 37% more elastic ability could be made on sustainable pavements. Waste tire powder-mixes performed 118% higher in maximum load and 97% higher in fracture toughness compared to control-mixes. It has been shown that low temperature performance could be improved when waste tire powder-added bitumen processed by dry method is mixed to hot mix asphalt up to 20%.

PENGARUH SERBUK BAN BEKAS SEBAGAI BAHAN TAMBAH PADA CPHMA DENGAN VARIASI SUHU PEMADATAN TERHADAP KARATERISTIK MARSHALL

Buton asphalt is a kind of natural asphalt found in Indonesia. The government is recently trying to develop various ways so that the use of Buton asphalt can be optimized to meet the demand for quality asphalt supplies for road pavements. CPHMA is a product from the development of Buton asphalt which has the advantage that it can be spread in conditions of air temperature (known as Cold mix) and elevated temperature (known as Hot mix). In this study, tire powder was used in addition to variations of 0%, 2.5%, 7.5% and 12.5% on CPHMA asphalt with variations in compaction temperature of 30oC, 60oC, 90oC, 120oC, and 150oC. Based on the results of tests carried out, the use of used tire powder from motor vehicle waste can improve the performance of CPHMA with an additional percentage of 2.5% at a compaction temperature of 150oC to meet the specified specifications. Keywords: CPHMA, Tire Powder, Marshall.