Correlating the Dynamic Modulus and the Indirect Tensile Strength of Asphalt Concrete

2013 ◽  
Vol 723 ◽  
pp. 268-275
Author(s):  
Islam Md Rashadul ◽  
Mekdim T. Weldegiorgis ◽  
A. Tarefder Rafiqul
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Indirect Tensile Strength ◽  
Reclaimed Asphalt Pavement ◽  
Standard Laboratory ◽  
Test Protocol ◽  
Reclaimed Asphalt ◽  
Indirect Tensile ◽  
Cylindrical Samples

This study has developed a relationship between the Dynamic Modulus (E*) and the Indirect Tensile Strength (ITS) of Hot-Mix Asphalt (HMA) using standard laboratory tests programs. Two types of SuperPave (SP) mixtures were considered namely, SP-III with 15% Reclaimed Asphalt Pavement (RAP) materials and SP-III with 35% RAP materials. Cylindrical samples of 100 mm diameter and 150 mm height were prepared. The samples were then tested for |E*| value at 210C at several loading frequencies following the AASHTO TP 62-07 test protocol. Next, the samples were cut into circular pieces of 38 to 50 mm thickness using laboratory saw. The samples are then tested for ITS value by applying a deformation rate of 50 mm per minute (AASHTO T 283 protocol). The ITS was calculated following the AASHTO T 283-07 test standard. The |E*| values (MPa) of SP-III with 15% RAP at 25, 10, 5.0, 1.0, 0.5, 0.1 Hz are measured to be 65, 59, 52, 34, 31, and 18 times of ITS (psi) respectively. The |E*| values (MPa) of SP-III with 35% RAP at 25, 10, 5.0, 1.0, 0.5, 0.1 Hz are measured to be 41, 38, 33, 24, 20, and 14 times of the ITS (psi) respectively. This study also draws a conclusion that increase in RAP has resulted in increased stiffness and strength.

scholarly journals Pengaruh Air Mengunakan Reclaimed Asphalt Pavement Pada Campuran Beton Aspal Berdasarkan Uji Cantabro Dan Indirect Tensile Strength

2021 ◽  
Vol 10 (1) ◽  
pp. 30-40
Author(s):  
Tommy Iduwin ◽  
Devita Mayasari ◽  
Tri Yuhanah
Keyword(s):  
Weight Loss ◽  
Tensile Strength ◽  
Indirect Tensile Strength ◽  
Reclaimed Asphalt Pavement ◽  
Test Results ◽  
Reclaimed Asphalt ◽  
Marshall Test ◽  
Indirect Tensile ◽  
Asphalt Content ◽  
The Impact

The impact of RAP on water was identified to be analyzed for the material's resistance to water because there are still a lot of waterlogged pavements in Indonesia. This research uses RAP variation 0%, 25% and 35%. The test is the Marshall test to get the optimum asphalt content value, the Cantabro test to determine the weight loss for 300 rounds and the durability by varying the immersion 0.1, 2, 4 and 7 days which will be tested for ITS. The KAO value obtained for each variation is 5.4% for 0% Rap, 5.6 for 25% Rap and 6% for 35% RAP. The results of the Cantabro test show that the largest percentage of weight loss is a mixture of 35% RAP which is 12.54%, where for 0% RAP there is a weight loss of 10.85% and at 25% RAP there is a weight loss of 11.66%. ITS test results have the highest value with variations of RAP 0%, RAP 25% and RAP 35%. variations of 0%, 25% and 35% showed a decreasing trend until the 7th day of immersion, it can be said that in the three variations the ITS value was influenced by the duration of continuous immersion. Keywords: RAP, AC-WC, Marshall, Cantabro, Indirect Tensile Strength

scholarly journals PENENTUAN KADAR AIR BAGI LAPIS PONDASI DAUR ULANG JALAN BERASPAL DENGAN FOAM BINTUMEN TERHADAP KUAT TARIK TAK LANGSUNG DAN KUAT TEAKAN BEBAS

Teknika ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. 48
Author(s):  
Donny Ariawan ◽  
Slamet Budirahardjo ◽  
Ikhwanudin Ikhwanudin
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Asphalt Pavement ◽  
Green Technology ◽  
Indirect Tensile Strength ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Indirect Tensile

Jalan beraspal merupakan salah satu prasarana transportasi utama di Indonesia yang belum sepenuhnya mencapai kondisi yang aman dan nyaman dimana sering dijumpai kondisi permukaan jalan yang tidak rata, bergelombang dan berlubang yang menyebabkan ketidaknyamanan bagi penggunanya. Kegiatan perbaikan dan pemeliharaan struktur perkerasan jalan, dalam hal ini jalan beraspal, menjadi sangat penting untuk kelangsungan kegiatan transportasi. Pesatnya perkembangan teknologi di bidang transportasi telah melahirkan satu terobosan baru tentang teknologi penanganan kerusakan jalan yaitu dengan cara daur ulang lapis perkerasan aspal yang sudah ada. Metode daur ulang ini memiliki keuntungan antara lain dapat menghemat biaya, merupakan green technology, memiliki kualitas yang sama dengan material baru, dan menjaga geometris perkerasan karena tebal perkerasan yang sama. Penentuan kadar air terbaik dalam campuran foam bitumen terhadap nilai kuat tarik tak langsung (ITS) serta kuat tekan bebas (UCS) untuk campuran lapis pondasi daur ulang. Dilakukan secara bertahap, dari pengujian untuk bahan penyusun campuran yaitu agregat baru, Reclaimed Asphalt Pavement (RAP), filler, aspal, dan foam bitumen. Kemudian uji terhadap campuran padat meliputi Uji Marshall, Uji Indirect Tensile Strength (ITS) dan Uji Unconfined Compressive Strength (UCS). Kadar air dan kadar foam bitumen sangat berpengaruh terhadap kuat tarik tak langsung (Indirect Tensile Strength/ITS) serta kuat tekan bebas (Unconfined Compressive Strength/UCS) dari campuran dingin daur ulang dengan foam bitumen. Nilai ITS, TSR dan UCS yang dicapai menggunakan kadar foam 2% dan kadar air optimum terbaik yang diketahui dalam penelitian sebesar 100% terhadap Kadar Air Optimum (KAO) yaitu masing- masing 301,04 kPa, 76,36%, dan 723,49 kPa

scholarly journals Asphalt concrete mixtures with addition of reclaimed asphalt pavements

2021 ◽  
Author(s):  
Piotr Zieliński
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Asphalt Pavements ◽  
Stiffness Modulus ◽  
Reclaimed Asphalt ◽  
Concrete Mixtures ◽  
Indirect Tensile ◽  
Reclaimed Asphalt Pavements

The effect of using reclaimed asphalt pavements (RAP) to asphalt concrete mixtures besides their utilization is to reduce the amount of the new bituminous binder and aggregate added to hot mix asphalt. This publication presents studies on asphalt mixtures with an increased up to 40% amount of RAP additive with the simultaneous use of 2 types of added bitumen, i.e. 35/50 and PMB 25/55-60. The aim of the paper is the evaluation of the basic mixture properties in a wide range of operating temperatures, as a part of the AC testing at high temperatures, the resistance to rutting at 60° C and indirect tensile strength at 40° C. The assessment of properties at intermediate operating temperatures is based on indirect tensile tests, including: elastic stiffness modulus at 5° C, 15° C and 30° C and static strength at 25° C. The low temperature properties have been tested in water and frost resistance tests by indirect tensile strength ratio. The results of the study were subjected to the analysis of the statistical significance of differences, which showed an improvement in the resistance of AC with the addition of RAP to the formation of permanent deformations and an increase in the stiffness modulus as well as indirect tensile strength. There was no adverse effect of the RAP additive on asphalt mixtures resistance to water and frost action.

scholarly journals Evaluation of Fatigue Potential for Crumb Rubber Modified Bitumen in Stone Mastic Asphalt Mixes

2021 ◽  
Vol 10 (3) ◽  
pp. 170-183
Author(s):  
Anusha T M ◽  
◽  
Sharath Kumar M D ◽  
Dr. H S Jagadeesh ◽  
◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fatigue Test ◽  
Asphalt Pavement ◽  
Indirect Tensile Strength ◽  
Engine Oil ◽  
Reclaimed Asphalt Pavement ◽  
Test Results ◽  
Reclaimed Asphalt ◽  
Indirect Tensile ◽  
Marshall Stability

SMA is a gap graded mix composed of a high concentration of coarse aggregate that is held together in a thick asphalt film by a matrix of mineral filler and stabilizers. Since natural aggregates have become expensive, hence Reclaimed Asphalt Pavement (RAP) can be reused in pavement construction to reduce the environmental hazardous due to disposal problems. Since the RAP contains used aggregates, it is highly prone to fatigue, thermal and reflective cracking effect. Rheological and chemical properties of aged bitumen in RAP can be enhanced by use of untreated waste oils such as waste engine oil as rejuvenators. This research presents a study on fatigue performance of SMA mix with Reclaimed Asphalt Pavement (RAP) materials with and without rejuvenators and results were compared with conventional SMA mix. The materials used were first characterized by common laboratory tests. Then the three SMA mixes are tested using several laboratory test procedures: Marshall Stability, indirect tensile strength, moisture susceptibility, and indirect tension fatigue test. The optimum proportions of the of the mixes with highest stability are selected from the Marshall stability test. The indirect tensile strength test results show that the SMA mix replaced with RAP without rejuvenators showed higher tensile strength ratio and resistance to moisture damage when compared to conventional mix and optimum RAP replacement mix with rejuvenators. The fatigue test was conducted for the three optimum mixes at different temperature and stresses. The fatigue test results showed that at lower temperature and stresses, the RAP replaced SMA without rejuvenator offered better fatigue resistance than those with rejuvenator and conventional SMA mix. At higher temperatures, the RAP replaced SMA mix with rejuvenator offered similar fatigue lifecycle as conventional mix. However, at high stresses, conventional SMA mix offered better fatigue lifecycle. Increase in failure stresses resulted in decrease of number of fatigue cycles and increased in initial tensile strain of the mix. Thus, with the use of RAP substantial decrease in cost can be achieved without compromising the fatigue characteristic of the SMA mix.

scholarly journals Effects of Using Limestone as a Filler and Starbit E-55 Asphalt as a Binder on the Performance of AC-WC Mixture

2019 ◽  
Vol 258 ◽  
pp. 04005
Author(s):  
Faizul Chasanah ◽  
Fajariesta Arta Putra
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Indirect Tensile Strength ◽  
Permeability Test ◽  
Second Stage ◽  
Performance Requirements ◽  
Indirect Tensile ◽  
Asphalt Content ◽  
Properties Of Materials ◽  
Last Stage

Asphalt concrete can be made through several methods including hot mix using Starbit E-55 asphalt as a binder and limestone as filler. This research aimed to determine the feasibility of the use of limestone as filler in AC-WC mixture and to identify the effects of limestone addition on the Marshall Characteristics, Durability, Indirect Tensile Strength (ITS), and Permeability. The first stage was to test the properties of materials consisting of aggregate, asphalt, and limestone. The second stage was to determine the optimum asphalt content with 0%, 25%, 50%, 75%, and 100% filler proportions, and the last stage was to conduct the Marshall, Immersion, ITS, and Permeability tests. The results showed that limestone has been in accordance with the performance requirements specified for a filler of AC-WC mixture using Starbit E-55 asphalt as a binder. There was a change in the Marshall characteristics of optimum asphalt content. The durability increased, and the ITS values of AC-WC mixture improved along with the increase in limestone proportion. However, the permeability test indicated that the mixture has a poor drainage feature towards water after variation in filler proportions was performed.

Research on Performance of Emulsion Asphalt Cold Reclaimed Mixture with Various RAP Contents

2011 ◽  
Vol 255-260 ◽  
pp. 3432-3436
Author(s):  
Xian Yuan Tang ◽  
Jie Xiao
Keyword(s):  
Tensile Strength ◽  
Low Temperature ◽  
Compression Test ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Beam Test ◽  
Reclaimed Asphalt ◽  
Indirect Tensile ◽  
The Impact

This paper systematically elaborates the impact upon performance of emulsion asphalt cold reclaimed asphalt mixture by different RAP contents, through a series of testing on six cold reclaimed asphalt mixtures with various RAP contents, such as single axle compression test, 15°C indirect tensile strength (ITS) test, 40°C rutting test and -10°C low-temperature bending beam test. Testing results indicate that 15°C ITS decreases from around 0.75 MPa to 0.58 MPa with the RAP content of mixture increasing from 0% to 100%. 40°C dynamic stabilities reduce considerably from around 19,000 time/mm of 0% RAP mixture to 3,600 time/mm of 100% RAP mixture. -10°C failure strains only change from 1500με to 2000με.

The Influence of Coconut Shell as Coarse Aggregates in Asphalt Mixture

2016 ◽  
Vol 700 ◽  
pp. 227-237 ◽  
Author(s):  
Siti Nur Amiera Jeffry ◽  
Ramadhansyah Putra Jaya ◽  
Norhafizah Manap ◽  
Nurfatin Aqeela Miron ◽  
Norhidayah Abdul Hassan
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Resilient Modulus ◽  
Asphalt Mixture ◽  
Indirect Tensile Strength ◽  
Coconut Shell ◽  
Engineering Properties ◽  
Modified Bitumen ◽  
Coarse Aggregates ◽  
Indirect Tensile

Significant quantities of coconut shell (CS), a by-product of agriculture, can be used as an artificial source of coarse aggregates. In this study, four CSs were used as coarse aggregates replacement in asphalt concrete with 0%, 10%, 20%, 30%, and 40% weight volumes. The particle sizes of the CSs used as main coarse aggregates range from 5 mm to 20 mm. The Marshall Stability test shows that the optimum bitumen content for asphalt mixtures is 5.1%. The engineering properties investigated include the volumetric, dynamic creep, indirect tensile strength, and resilient modulus. Test results show that stability decreases with increasing CS content because of high water absorption. Considering that CSs absorb bitumen, a further detailed investigation is needed to assess the performance of modified bitumen on mixture. Furthermore, the use of CSs as coarse aggregates in asphalt concrete help increase the resilient modulus, stiffness, and indirect tensile strength up to 30%. Generally, a 10% replacement of coarse aggregates with CSs is the optimal limit.

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