scholarly journals Mechanistic Approach for Reducing the Thickness of Asphalt Layer Incorporating Steel Slag Aggregate

2018 ◽  
Vol 4 (2) ◽  
pp. 334 ◽  
Author(s):  
Adham Mohammed Alnadish ◽  
Yusri Mohamad Aman
Keyword(s):  
Polyvinyl Alcohol ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Steel Slag ◽  
Stiffness Modulus ◽  
Polyvinyl Alcohol Fiber ◽  
Mechanistic Approach ◽  
Dynamic Creep ◽  
Creep Stiffness ◽  
The Cost

This study aimed to evaluate the possibility of reducing the thickness of asphalt layer as a novel solution for the high density of asphalt layer incorporated with steel slag aggregate, which increase the cost of transportation. Mechanistic-Empirical Pavement Design (MEPDG) approach was employed to evaluate the benefits of introducing polyvinyl alcohol fiber in terms of reducing the thickness of asphalt layer as well as the extension service life of asphalt layer. On the other hand, the correlation between creep strain slope (CSS) and secant creep stiffness modulus (SCSM) were assessed to provide a better evaluation and understanding concerning of the outputs of the dynamic creep test. The findings of this study showed that introducing polyvinyl alcohol fiber into the mixtures at the optimum content (0.5 kg/ton) have reduced the thickness of asphalt layer by approximately 10%. Additionally, polyvinyl alcohol fiber has increased the performance of the asphalt mixtures concerning of resilient modulus and dynamic creep. Furthermore, the correlation between CSS and SCSM was strong, which indicates that evaluation of permanent deformation using CSS and SCSM parameters provides better actual assessment than accumulation strain.

scholarly journals MECHANICAL PERFORMANCE OF ASPHALT MIXTURE CONTAINING CUP LUMP RUBBER

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Norfazira Mohd Azahar ◽  
Norhidayah Abdul Hassan ◽  
Ramadhansyah Putra Jaya ◽  
Hasanan Md. Nor ◽  
Mohd Khairul Idham Mohd Satar ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Modified Asphalt ◽  
Dynamic Creep ◽  
Aging Conditions ◽  
Public Work Department ◽  
Indirect Tensile

The use of cup lump rubber as an additive in asphalt binder has recently become the main interest of the paving industry. The innovation helps to increase the natural rubber consumption and stabilize the rubber price. This study evaluates the mechanical performance of cup lump rubber modified asphalt (CMA) mixture in terms of resilient modulus, dynamic creep and indirect tensile strength under aging conditions. The CMA mixture was prepared using dense-graded Marshall-designed mix and the observed behavior was compared with that of conventional mixture. From the results, both mixtures passed the volumetric properties as accordance to Malaysian Public Work Department (PWD) specification. The addition of cup lump rubber provides better resistance against permanent deformation through the enhanced properties of resilient modulus and dynamic creep. Furthermore, the resilient modulus of CMA mixture performed better under aging conditions.  

The Performance of Styrene Butadiene Rubber on the Engineering Properties of Asphaltic Concrete AC14

2016 ◽  
Vol 700 ◽  
pp. 238-246 ◽  
Author(s):  
Dewi Sri Jayanti ◽  
Ramadhansyah Putra Jaya ◽  
Siti Aspalaili Mohamd Sharif ◽  
Norhidayah Abdul Hassan ◽  
Siti Nur Amiera Jeffry ◽  
...  
Keyword(s):  
Resilient Modulus ◽  
Asphalt Mixture ◽  
Engineering Properties ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Asphaltic Concrete ◽  
Dynamic Creep ◽  
Creep Stiffness ◽  
And Performance ◽  
Styrene Butadiene

This study investigated the effects of adding various percentages of styrene–butadiene rubber (SBR) on the engineering properties and performance of asphaltic concrete. SBR was added into the mixture at 0%, 1%, 3%, and 5% on a mass-to-mass basis. Conventional bitumen used in this study was 80/100 PEN. The performances of SBR on the asphalt mixture properties were evaluated based on Marshall Stability, abrasion loss, resilient modulus, and dynamic creep test. Results indicated an improvement in the engineering properties and performance with the addition of SBR content. For instance, stability increased by 18.8% as the SBR content increased from 0% to 5%. Dynamic creep stiffness also increased by 46.2%. Similarly, the resilient modulus was also found to increase by approximately 84.6%.

Utilization of Waste Cooking Oil (WCO) in Hot Mix Asphalt (HMA)

2020 ◽  
pp. 22-46
Author(s):  
Mastura Bujang ◽  
Wan Nur Aifa Wan Azahar ◽  
Euniza Jusli
Keyword(s):  
Chemical Treatment ◽  
Hot Mix Asphalt ◽  
Mechanical Performance ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Poor Performance ◽  
Waste Cooking Oil ◽  
Superior Performance ◽  
Dynamic Creep ◽  
Modified Binder

The use of WCO in binder modification is widely explored in response to waste management issue. A chemical treatment was proposed to reduce the acidity of the WCO that causes its poor performance. Therefore, this chapter evaluates the performance of binders modified with untreated and treated WCO. The physical and rheological tests of binder were conducted to determine optimum percentages of untreated and treated WCO in the binder. The optimum WCOs were utilized for mechanical performance evaluation of Hot Mix Asphalt (HMA) mixture through resilient modulus and dynamic creep. The test showed the failure temperature of binder modified using the treated WCO has increased to 70°C and the treated WCO mixture recorded superior performance by being less susceptible to permanent deformation as compared to the control mix. In conclusion, the chemical treatment had improved the treated WCO performance in the modified binder as asphalt paving materials.

EFFECTS OF SHORT TERM AGING ON DYNAMIC CREEP PROPERTIES OF ASPHALT MIXTURES

2015 ◽  
Vol 76 (14) ◽  
Author(s):  
Meor Othman Hamzah ◽  
Seyed Reza Omranian
Keyword(s):  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Creep Properties ◽  
Cumulative Strain ◽  
Dynamic Creep ◽  
Aging Conditions ◽  
Creep Stiffness ◽  
Creep Modulus ◽  
Effects Of Aging ◽  
Pavement Service Life

Many factors affect pavement service life. Aging as one of these factors occurs due to binder volatilization and oxidation. Aging increases binder viscosity and subsequently results in stiffer mixtures. Transportation of asphalt mixture from plant to field may cause variations in the levels of aging. This study attempts to determine the effects of aging on mixture permanent deformation or rutting during transportation from plant to field and to simulate the aging conditions in the laboratory. The rutting parameters evaluated include creep stiffness, cumulative strain, creep modulus and creep rates of mixtures collected from plant, field and samples artificially produced in the laboratory. The results showed that temperature increment significantly changed mixtures rutting properties, while aging during mixture transportation from plant to field has no effect on rutting. It was also found that artificially aging the mixtures by varying aging duration that conducted for this study, cannot exactly simulate the plant and field aging conditions. 

scholarly journals Rutting Resistance of Hot Mix Asphalt Containing Coarse Recycled Concrete Aggregates Coated with Waste Plastic Bottles

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Alireza Azarhoosh ◽  
Mehdi Koohmishi ◽  
Gholam Hossein Hamedi
Keyword(s):  
Asphalt Concrete ◽  
Cement Mortar ◽  
Permanent Deformation ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Creep Tests ◽  
Stiffness Modulus ◽  
Waste Plastic ◽  
Rutting Resistance ◽  
Dynamic Creep

The use of recycled concrete aggregate (RCA) as a part of coarse aggregates in asphalt pavements confers economic and environmental benefits. Coarse RCA (CRCA) has inferior mechanical and physical properties compared to natural aggregates due to very porous and weakly adhered cement mortar. In this study, CRCA surfaces were coated with waste plastic bottles (WPB) and used at 15%, 30%, and 50% in the asphalt concrete. The Marshall, stiffness modulus, and dynamic creep tests were performed to determine the strength of hot mix asphalts against rutting. The results revealed that the use of untreated CRCA reduced the Marshall quotient and the rutting resistance of the asphalt concrete. The results of the stiffness modulus and dynamic creep tests indicated that CRCA incorporation increased permanent deformation in the tested specimens due to the reduction of asphalt concrete stiffness. However, the asphalt concrete containing treated CRCA had lower permanent deformation because WPB promotes CRCA stability by penetrating its void and reinforcing cement mortar. Furthermore, by raising the temperature, the strength of all asphalt concretes decreased against rutting, and the reduction rate was higher in the modified specimens.

scholarly journals Effects of Carbon Fibre on Performance Properties of Asphalt Mixtures

2020 ◽  
Vol 15 (2) ◽  
pp. 49-65 ◽  
Author(s):  
Tacettin Geckil ◽  
Perviz Ahmedzade
Keyword(s):  
Carbon Fibre ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Positive Contribution ◽  
Stiffness Modulus ◽  
Performance Properties ◽  
Creep Stiffness ◽  
Indirect Tensile ◽  
Marshall Stability

In this study, the effects of carbon fibre on improving the performance characteristics of asphalt mixtures were investigated. To this end, four percentages of carbon fibre (0%, 0.3%, 0.5%, and 0.7% by weight of bitumen) were used as an additive in asphalt mixtures. The mechanical properties of prepared mixture specimens were investigated using tests such as Marshall Stability and flow, Indirect Tensile Stiffness Modulus, Creep Stiffness, Indirect Tensile Strength, and moisture resistance. The results of tests applied to asphalt mixtures showed that the carbon fibre additive increased the resistance to shear stress by 25%, the fatigue life by 51% at 40 °C and the permanent deformation resistance by 2.25 times at 60 °C. It also improved the resistance of mixtures to moisture damage by increasing the durability and cohesion of asphalt mixtures. Experimental results indicated that the carbon fibre provided a positive contribution to the performance properties of asphalt pavements.

Laboratory Investigation on the Effects of Flaky Aggregates on Dynamic Creep and Resilient Modulus of Asphalt Mixtures

2014 ◽  
Vol 70 (4) ◽  
Author(s):  
Mohd Zul Hanif Mahmud ◽  
Haryati Yaacob ◽  
Ramadhansyah Putra Jaya ◽  
Norhidayah Abdul Hassan
Keyword(s):  
Laboratory Tests ◽  
Significant Contribution ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Tensile Modulus ◽  
Asphalt Mixtures ◽  
Dynamic Creep ◽  
Bitumen Content ◽  
Indirect Tensile

This paper presents an investigation on the effects of flaky aggregates in asphalt mixture. In general, aggregate characteristics are critical to the performance of asphalt mixture. Therefore, flaky aggregate is normally avoided simply because it has significant contribution towards the gradation and reduces the interlocking characteristics of aggregates within asphalt mixture. In practice, it is recommended that the amount of flakiness aggregate should be limited to 25% or less. This study evaluates the mechanical properties of asphalt mixture specimens prepared with various percentages of flaky aggregates particularly 10%, 20% and 30% by the total weight of the mixture. Several laboratory tests were conducted including Marshall properties test, Indirect Tensile Modulus test and Dynamic Creep test. The results show that higher bitumen content is required with the increased in the amount of flaky aggregates added to mixture. Furthermore, greater amount of flaky aggregates tends to reduce the mixture’s resilient modulus and its resistance against permanent deformation.

scholarly journals Performance of Charcoal Coconut Shell Ash in the Asphalt Mixture under Long Term Aging

2019 ◽  
Vol 8 (3S3) ◽  
pp. 383-387
Keyword(s):  
Resilient Modulus ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Coconut Shell ◽  
The Road ◽  
Dynamic Creep ◽  
Coconut Shell Ash ◽  
The Stability ◽  
Marshall Stability

Improvement in transportation system is never been as easy as just providing links for better connection and network but more to do with the pavement quality of the road itself. Modification with agriculture waste is just another approach to enhance the performance of asphaltic concrete. In this study, a non-traditional bitumen modifier from a coconut shell which is the charcoal coconut shell ash (CCSA) was used. Addition of CCSA in bitumen with 0%, 2%, 4%, 6%, and 8% by weight of bitumen were investigated along with the laboratory stimulation of aging was applied in this study. Properties of modified asphalt mixture were determined using resilient modulus, dynamic creep and Marshall Stability test.. Results of samples with CCSA which underwent aging show some improvement in terms of the stability and permanent deformation characteristics. Resilient modulus, dynamic creep and Marshall Stability tests recorded the highest rates when compared to controlled sample. Hence, for more durable asphalt concrete and high serviceability it is recommended to use 2% to 4% of CCSA.

scholarly journals Effect of the Densification of the Reinforced-Asphalt Mixtures on the Permanent Deformation

2018 ◽  
Author(s):  
Adham Mohammed Alnadish ◽  
Mohamad Yusri Aman
Keyword(s):  
Positive Relationship ◽  
Permanent Deformation ◽  
Steel Slag ◽  
Negative Influence ◽  
Asphalt Mixtures ◽  
Polyester Fiber ◽  
The Other ◽  
Dynamic Creep ◽  
Negative Effect ◽  
Elastic Stage

This study aimed to provide a novel contribution in terms of introducing a better understanding for evaluating the resistance of the reinforced asphalt mixtures to permanent deformation. The resistance of asphalt mixtures to permanent deformation was assessed using dynamic creep test at a temperature of 40 °C. Four mixtures named Mix1, Mix2, Mix3, and Mix 4 were evaluated, Mix1 corresponds to the control mixture that containing coarse steel slag aggregate while Mix2, Mix3, and Mix4 represent the reinforced mixtures with polyester fiber at the proportions of 0.05, 0.15, and 0.3%, respectively. The findings of this study showed that the elastic deformation occurred at the primary stage has a negative influence regarding the permanent deformation assessment. In addition, increasing the content of the polyester fiber has a positive relationship with the elastic stage; the higher the proportion of the fiber, the higher the deformation at the elastic stage, which have a negative effect on the evaluation of the mixtures resistance to permanent deformation, if the deformation occurred at the elastic stage is not neglected. On the other hand, the mixtures containing a high content of polyester fiber exhibited better resistance to the permanent deformation at the viscoelastic stage

scholarly journals Influence of the Long-Term Oven Aging on the Performance of the Reinforced Asphalt Mixtures

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 953 ◽  
Author(s):  
Adham Mohammed Alnadish ◽  
Mohamad Yusri Aman ◽  
Herda Yati Binti Katman ◽  
Mohd Rasdan Ibrahim
Keyword(s):  
Resilient Modulus ◽  
Permanent Deformation ◽  
Steel Slag ◽  
Asphalt Mixtures ◽  
Elastic Behavior ◽  
Performance Tests ◽  
Asphalt Mixes ◽  
Synthetic Fibers ◽  
Aged Asphalt

The long-term aging of the asphalt mixtures has become a major concern because it decreases the lifespan of the asphalt layer. In this study, the asphalt mixtures incorporating steel slag aggregates were reinforced with synthetic fibers as a novel contribution in terms of decreasing the effect of aging on the performance of the asphalt mixtures. However, different mixtures—namely, Mix0, Mix1, and Mix2—were subjected to long-term oven aging to study the effect of the aging on the performance of the asphalt mixes. Mix0 consisted of coarse and fine granite aggregates, while Mix1 was composed of coarse steel slag aggregate and fine granite aggregate. Mix2 represents the reinforced asphalt mixtures incorporating coarse steel slag aggregate and reinforced with the synthetic fibers of polyvinyl alcohol, acrylic, and polyester at the proportion of 0.3% by weight of the aggregates. The conducted performance tests were resilient modulus, rutting depth, and cracking resistance. The outputs of the performance tests for the unaged asphalt mixes displayed that the mixtures incorporating coarse steel slag aggregate exhibited better performance than the mixtures containing granite aggregate. Meanwhile, the reinforced asphalt mixtures have shown a lower resilient modulus and a higher permanent deformation than the unreinforced asphalt mixes due to the elastic behavior. Otherwise, the reinforced asphalt mixtures have shown superior resistance to cracking in comparison to the unreinforced mixtures. On the other hand, the performance of the aged asphalt mixtures demonstrated that the mixtures containing granite aggregates exhibited a lower susceptibility to aging than the mixtures incorporating steel slag aggregate. Meanwhile, the performance of the aged reinforced asphalt mixtures showed that introducing synthetic fibers has decreased the effect of the long-term oven aging.

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