Evaluation of Crumb Tire Rubber-Modified Hot Mix Asphalt Concrete in Sudan

Osman, Sami A.; Adam, Andi Arham

doi:10.1061/9780784412671.0021

Cited by 8 publications

(5 citation statements)

References 3 publications

(1 reference statement)

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“…Softening point values increase with aging time as indicated in fig.4. When Crumb rubber was added to asphalt cement, the softening point increases as rubber content increases, such results agree with and (Osman & Adam 2012) findings. The ductility of asphalt cement without additive was (+100 mm).…”

Section: Effect Of Rubber and Aging On Physical Properties Of Asphaltsupporting

confidence: 90%

Contribution of Crumb Rubber in the Aging Process of Asphalt Concrete

Sarsam¹,

Alsadik²

2014

IJSRK

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Implementation of sustainable solutions in the road construction industry is considered as one of the major research topics worldwide. The impact of aging process on the properties of asphalt cement and asphalt concrete was investigated using both of short and long-term aging. Scrap tire rubber was introduced into asphalt cement to modify its physical and rheological properties. Two percentages of crumb rubber (8 and 16) percent by weight of asphalt cement have been tried to modify the properties of asphalt cement, and to investigate its contribution in the aging process. Such modified asphalt was implemented in the construction of asphalt concrete. Marshal, Resilient Modulus, and tensile properties of rubber-modified asphalt concrete were tested and compared with different aging periods and with that of reference mix. The results show that aging for 7 hours of asphalt cement, make the asphalt stiffer, that lead to decreased penetration by an average value of (47.24%), ductility (49.6%) and increased softening point (10.75%) and creep stiffness (79.25%). It was concluded that 8% of crumb rubber is able to overcome the negative impact of short and long term aging on overall asphalt cement and asphalt concrete properties, and improves the rutting resistance at 1000 repetition by (32.4 % and 57.3%) for short and long term aging respectively.

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Section: Effect Of Rubber and Aging On Physical Properties Of Asphaltsupporting

confidence: 90%

Contribution of Crumb Rubber in the Aging Process of Asphalt Concrete

Sarsam¹,

Alsadik²

2014

IJSRK

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“…Hence, the pavement that is incorporated https://doi.org/10.31436/iiumej.v25i1.2969 with crumb rubber will be less likely to go through any deterioration due to hot climatic weather such as rutting. This conclusion can also be supported by the authors of [6], as the authors mentioned on the research paper that the results of inclining softening point value with increment of percentage of crumb rubber indicate that pavements that is constructed using CRMB would be less susceptible to traffic deformation distress at high temperatures compared to conventional asphalt pavements. According to [11], high softening point was desirable for hot and warm climates application.…”

Section: Softening Pointsupporting

confidence: 53%

“…According to the previous research executed by the authors of [2] and [15], the value of the Marshall stability and stiffness should be enhanced as the percentage of crumb rubber replacement increases, however the result of this research shows a different outcome especially for the dense mixture. Nonetheless, the authors of [6] stated in the findings that the reduction in the value of Marshall stability and stiffness after the introduction of crumb rubber to the mixture may happen due to lack of adhesion between the aggregates. This may occur as with higher crumb rubber percentage, the binder would become more viscous and less workable.…”

Section: Marshall Stability Flow and Stiffnessmentioning

confidence: 99%

“…However, it was reported by the author of [6] that the CRMB may have exceptional field performance, but its effects may be diminished due to the poor design, varying properties of CRMB, and poor construction practices. Furthermore, the research findings claimed that the performance of the CRMB may be dependent on the crumb rubber size, surface area, percentage of replacement, time, and temperature for the mixing process, as well as the aggregate gradation used.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Mechanical Performance of Dense Grading and Porous Grading Mixture Utilized With Crumb Rubber Modified Binder

ESA,

Aifa,

KASIM

et al. 2024

IIUMEJ

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Pavement and road networks play a very huge role in everyone’s daily lives to connect from one point to another point. With globalization, growth in the economy, and development, the number of vehicles traveling each day on the road increases rapidly over the years. Thus, the constant application of heavy loads together with Malaysia’s climatic factors lead the pavement to be susceptible to deterioration such as potholes and cracking. The service life and resistance of the pavement to deterioration can be improved with the incorporation of crumb rubber modified binder (CRMB) for asphaltic pavement. Hence, the objective of this research is to do a comparative evaluation of the mechanical performance of the CRMB that is utilized in dense grading and porous grading mixtures with varying percentage of crumb rubber replacement. The experimental portion of the research was done by substituting the crumb rubber at the replacement percentages of 12%, 14%, 16% and 18% (from the weight of asphalt binder) in preparing the modified binder that was further evaluated by conducting physical testing (penetration and softening point test). Then, the mechanical evaluation of dense and porous grading asphalt mixtures incorporating the crumb rubber was performed with Marshall stability and flow prior to comparing the strength performance for both asphalt mixtures. Based on the result obtained, it was found that the highest percentage of crumb rubber replacement, which is 18%, would give the highest level of stiffness and softening point on the binder. Furthermore, from the Marshall test, it was established that 16% of crumb rubber replacement on asphaltic binder is the most optimum for a porous mixture, given that the CRMB is 5% of the total mix. Nonetheless, at the same 16% of crumb rubber replacement, the value for Marshall test on the dense mixture shows an adverse result when compared to the control. Hence, it was concluded that the mechanical performance of CRMB utilized with porous mixtures shows more impressive results compared CRMB utilized with dense mixtures. ABSTRAK: Turapan dan rangkaian jalan raya memainkan peranan besar dalam kehidupan harian setiap orang dalam berhubung dari tempat ke tempat lain. Melalui globalisasi dan pertumbuhan ekonomi dan pembangunan, bilangan kenderaan bergerak setiap hari di atas jalan raya telah meningkat mendadak beberapa tahun kebelakangan ini. Oleh itu, beban berat berterusan bersama-sama faktor iklim Malaysia menyebabkan turapan jalan terdedah kepada kerosakan seperti jalan berlubang dan keretakan. Jangka hayat perkhidmatan dan rintangan turapan terhadap kerosakan jalan boleh diperbaiki melalui turapan asfaltik yang diubah suai dengan pengikat serbuk getah (CRMB). Justeru, kajian ini bertujuan bagi membanding prestasi mekanikal CRMB yang digunakan dalam campuran penggredan padat dan campuran berliang dengan peratusan penggantian serbuk getah berbeza. Kajian dijalankan dengan menggantikan serbuk getah pada peratusan penggantian pada 12%, 14%, 16% dan 18% (daripada berat pengikat asfalt) dalam menyediakan bahan pengikat yang diubah suai dan seterusnya dinilai melalui ujian fizikal (ujian takat penembusan dan takat lembut). Kemudian, penilaian mekanikal dijalankan ke atas campuran serbuk getah bersama asfalt bergred padat dan berliang. Kajian dijalankan mengguna pakai ujian kestabilan dan aliran Marshall sebelum membandingkan prestasi kekuatan bagi kedua-dua campuran asfalt. Keputusan menunjukkan dapatan peratusan pada 18% memberikan tahap kekakuan dan takat lembut tertinggi pada bahan penggantian pengikat serbuk getah. Tambahan, ujian Marshall menunjukkan 16% daripada penggantian serbuk getah pada pengikat asfaltik adalah paling optimum pada campuran berliang, di mana 5% daripada jumlah campuran merupakan CRMB. Namun, ujian Marshall pada campuran padat dengan penggantian serbuk getah 16% yang sama, menunjukkan dapatan nilai buruk berbanding pada kawalan. Oleh itu, prestasi mekanikal CRMB yang digunakan bersama campuran berliang menunjukkan dapatan lebih mengagumkan berbanding CRMB yang digunakan melalui campuran padat.

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“…Given the high-viscosity of the rubberized binder and the presence of rubber particles in the bituminous matrix, the rubberized DG HMAs have a slightly higher bitumen content compared to DG mixtures with either neat or other polymer-modified binders. In most of the cases, it has been found that the superior performance of the rubberized bitumen improved the thermo-mechanical response of the mixtures compared to traditional HMAs [21,22].…”

Section: Introductionmentioning

confidence: 99%

Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region

Marini

Lanotte

2021

Polymers

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Waste rubber from end-of-life tires has been proved to be an excellent source of polymeric material for paving applications. Over the years, however, the rubberized asphalt technology has never been used in ‘lean’ (low bitumen content) asphalt mixtures typically used in arid regions. This study offers an insight on the potential benefits and drawbacks resulting from this technology if applied in such ‘lean’ mixes. Results show that the ‘lean’ nature of those asphalt mixes eliminates the potential benefits given by the modified bitumen for rutting performance. Instead, the aggregates gradation plays a major role in the response of the materials, with gap-graded mixtures often outperforming those with a dense-graded gradation. On the contrary, fatigue cracking resistance is affected by the bitumen properties, and rubberized asphalt perform better than others. The performance-based analysis suggests that the current specifications tend to overachieve the goal of reducing permanent deformation while cracking becomes a major concern which can be solved by using rubberized asphalt. In the field, gap-graded asphalt with rubberized bitumen showed the best response in terms of skid resistance and noise reduction.

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Evaluation of Crumb Tire Rubber-Modified Hot Mix Asphalt Concrete in Sudan

Cited by 8 publications

References 3 publications

Contribution of Crumb Rubber in the Aging Process of Asphalt Concrete

Contribution of Crumb Rubber in the Aging Process of Asphalt Concrete

Comparison of the Mechanical Performance of Dense Grading and Porous Grading Mixture Utilized With Crumb Rubber Modified Binder

Waste Rubber from End-of-Life Tires in ‘Lean’ Asphalt Mixtures—A Laboratory and Field Investigation in the Arid Climate Region

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