scholarly journals Study on Structural Performance of Asphalt Concrete and Hot Rolled Sheet Through Viscoelastic Characterization

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1133 ◽  
Author(s):  
Senja Rum Harnaeni ◽  
Florentina Pungky Pramesti ◽  
Arif Budiarto ◽  
Ary Setyawan ◽  
Muhammad Imran Khan ◽  
...  
Keyword(s):  
Phase Angle ◽  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Asphalt Mixture ◽  
Reference Temperature ◽  
Rolled Sheet ◽  
Loading Frequency ◽  
Master Curves ◽  
Viscoelastic Parameters ◽  
Hot Rolled

The aim of this study is to assess the viscoelastic parameters (i.e., phase angle and dynamic modulus) of asphalt concrete-wearing course (AC-WC) and hot rolled sheet-wearing course (HRS-WC) mixtures obtained from the dynamic modulus test. This study was accomplished in four stages: determining optimum asphalt content using Marshall mix design procedure, stability and flow parameters from Marshall test, viscoelastic parameters from dynamic modulus testing and finally the generation of dynamic modulus master curves at a reference temperature of 25 °C. The results showed that at the same temperature, the dynamic modulus of AC-WC and HRS-WC mixtures tended to increase with escalating the loading frequency, while dynamic modulus decreases with an increase in the test temperature at constant loading frequency. Furthermore, the dynamic modulus of the AC-WC mixture was recorded as 100% higher than the HRS-WC asphalt mixture. The phase angle, however, showed contradictory behavior with that shown in dynamic modulus. The phase angle of the AC-WC mixture and HRS-WC asphalt mixture showed almost the same behavior. Similarly, the dynamic modulus master curves of AC-WC and HRS-WC asphalt mixtures can be used to predict the dynamic modulus at the frequency range of 0.01 to 10 Hz and a reference temperature of 25 °C. The results were also used to evaluate the rutting and fatigue performance of AC-WC and HRS-WC.

scholarly journals The Effects of Asphalt Migration on the Dynamic Modulus of Asphalt Mixture

2019 ◽  
Vol 9 (13) ◽  
pp. 2747 ◽  
Author(s):  
Hui Wang ◽  
Shihao Zhan ◽  
Guojun Liu
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Testing Temperature ◽  
Asphalt Mixtures ◽  
Loading Frequency ◽  
Stiffness Parameter ◽  
Master Curves ◽  
Asphalt Content

Asphalt migration is one of the significant detrimental effects on asphalt pavement performance. In order to simulate the state after the occurrence of asphalt migration amid asphalt pavement layers and further investigate the effects of asphalt migration on the dynamic modulus of asphalt mixture, samples with different asphalt contents layers were firstly separated into the upper and lower half portions and then compacted together. By conducting the dynamic modulus test with the Superpave Simple Performance Tester (SPT), the variation laws of the dynamic modulus (|E*|) and the phase angle (δ) at different testing temperatures and loading frequencies were analyzed in this paper. Further, the dynamic modulus and the stiffness parameter (|E*|/sinδ) at the loading frequency of 10 Hz and testing temperature of 50 °C were illustrated. Simultaneously, the master curves of the dynamic modulus and phase angle of asphalt mixtures under different testing conditions were constructed to better investigate the effects of asphalt migration on the dynamic modulus by means of Williams–Landel–Ferry (WLF) equation and Sigmoidal function. Results show that, after the asphalt migration, the dynamic modulus of asphalt mixtures increase with the increasing loading frequency while they decrease with the increasing testing temperature; the dynamic modulus and the stiffness parameter are the highest when asphalt mixtures have the optimum asphalt content layers, and then decrease with the incremental difference of asphalt content in the upper and lower half portions. Besides this, different from the master curves of dynamic modulus, the master curves of phase angle firstly increase with the increase of loading frequency to the highest point and then decrease with the further increase of loading frequency and are not as smooth as that of dynamic modulus. It can be concluded that the asphalt migration has compromised the mixture’s mechanical structure, and the more asphalt migrates, the weaker the mechanical properties of asphalt mixture will be. Additionally, based on the shift factors and master curves in the time–temperature superposition principle (TTSP), the effects of asphalt migration on the dynamic modulus and the variation laws of the dynamic modulus of asphalt mixture after the occurrence of asphalt migration can be better construed at the quantitative level.

scholarly journals Predict the Phase Angle Master Curve and Study the Viscoelastic Properties of Warm Mix Crumb Rubber-Modified Asphalt Mixture

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5051
Author(s):  
Fei Zhang ◽  
Lan Wang ◽  
Chao Li ◽  
Yongming Xing
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Master Curve ◽  
Loss Modulus ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Master Curves ◽  
Modified Asphalt ◽  
Sigmoidal Model

To identify the most accurate approach for constructing of the dynamic modulus master curves for warm mix crumb rubber modified asphalt mixtures and assess the feasibility of predicting the phase angle master curves from the dynamic modulus ones. The SM (Sigmoidal model) and GSM (generalized sigmoidal model) were utilized to construct the dynamic modulus master curve, respectively. Subsequently, the master curve of phase angle could be predicted from the master curve of dynamic modulus in term of the K-K (Kramers–Kronig) relations. The results show that both SM and GSM can predict the dynamic modulus very well, except that the GSM shows a slightly higher correlation coefficient than SM. Therefore, it is recommended to construct the dynamic modulus master curve using GSM and obtain the corresponding phase angle master curve in term of the K-K relations. The Black space diagram and Wicket diagram were utilized to verify the predictions were consistent with the LVE (linear viscoelastic) theory. Then the master curve of storage modulus and loss modulus were also obtained. Finally, the creep compliance and relaxation modulus can be used to represent the creep and relaxation properties of warm-mix crumb rubber-modified asphalt mixtures.

Master Curves of Dynamic Modulus and Phase Angle for High Modulus Asphalt Mixtures

2011 ◽  
Vol 243-249 ◽  
pp. 4226-4230
Author(s):  
Li Tao Geng ◽  
Rui Bo Ren ◽  
Li Zhi Wang ◽  
Cui Lan Gao
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Superposition Principle ◽  
Asphalt Mixture ◽  
Performance Testing ◽  
Temperature Shift ◽  
Asphalt Mixtures ◽  
Least Square ◽  
High Modulus ◽  
Master Curves

Two types of high modulus asphalt mixtures are introduced. Dynamic modulus and phase angle of these two mixtures are tested with Simple Performance Testing System under different temperatures, loading frequencies and confining pressures. Based on time-temperature superposition principle, dynamic modulus master curves and time-temperature shift factors at reference temperature are obtained using nonlinear square least square regression, and phase angle master curves are constructed utilizing the same time-temperature shift factors. The influence of confining pressure on mechanical properties of high modulus asphalt mixture is discussed.

scholarly journals Characterization of Various Plant-Produced Asphalt Concrete Mixtures Using Dynamic Modulus Test

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Muhammad Irfan ◽  
Asad S. Waraich ◽  
Sarfraz Ahmed ◽  
Yasir Ali
Keyword(s):  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Prediction Models ◽  
Compressive Loading ◽  
Asphalt Mixture ◽  
Statistical Technique ◽  
Loading Frequency ◽  
Concrete Mixtures ◽  
Dynamic Modulus Test ◽  
Stress Dependent

This research characterizes the performance of various plant-produced asphalt concrete mixtures by dynamic modulus|E∗|test using asphalt mixture performance tester (AMPT). Marshall designed specimens of seven different mixtures were prepared using the Superpave gyratory compactor and subjected to sinusoidal compressive loading at various temperatures (4.4 to 54.4°C) and loading frequencies (0.1 to 25 Hz). A catalog of default dynamic modulus values for typical asphalt concrete mixtures of Pakistan was established by developing stress-dependent master curves separately, for wearing and base course mixtures. The sensitivity of temperature and loading frequency on determination of dynamic modulus value was observed by typical isothermal and isochronal curves, respectively. Also, the effects of various variables on dynamic modulus were investigated using statistical technique of two-level factorial design of experiment. Furthermore, two dynamic modulus prediction models, namely, Witczak and Hirsch, were evaluated for their regional applicability. Results indicated that both the Witczak and Hirsch models mostly underpredict the value of dynamic modulus for the selected conditions/mixtures. The findings of this study are envisaged to facilitate the implementation of relatively new performance based mechanistic-empirical structural design and analysis approach.

scholarly journals Mesostructural Modeling of Dynamic Modulus and Phase Angle Master Curves of Rubber Modified Asphalt Mixture

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1667 ◽  
Author(s):  
Linhao Gu ◽  
Luchuan Chen ◽  
Weiguang Zhang ◽  
Haixia Ma ◽  
Tao Ma
Keyword(s):  
Finite Element ◽  
Phase Angle ◽  
Dynamic Modulus ◽  
Master Curve ◽  
Asphalt Mixture ◽  
Maxwell Model ◽  
Master Curves ◽  
Modified Asphalt ◽  
2S2p1d Model ◽  
Asphalt Mortar

The main objective of this paper was to develop a mesostructure-based finite element model of rubber modified asphalt mixture to predict both the dynamic modulus master curve and phase angle master curve under a large frequency range. The asphalt mixture is considered as a three-phase material consisting of aggregate, asphalt mortar, and air void. The mesostructure of the asphalt mixture was digitized by a computed tomography (CT) scan and implemented into finite element software. The 2S2P1D model was used to obtain the viscoelastic information of an asphalt mortar under a large range of frequencies and temperatures. The continuous spectrum of the 2S2P1D model was converted to a discrete spectrum and characterized by the generalized Maxwell model for numerical simulation. The Prony series parameters of the generalized Maxwell model and the elastic modulus of the aggregates were inputted into the finite element analysis as material properties. The dynamic modulus tests of a rubber modified asphalt mortar and asphalt mixture were conducted under different temperatures and loading frequencies. The dynamic modulus master curve and phase angle master curve of both asphalt mortar and asphalt mixture were constructed. The frequency of the finite element simulations of the dynamic modulus tests ranged from 10−6 to 104. The dynamic modulus and phase angle of the asphalt mixture was calculated and the master curves were compared with the master curves obtained from the experimental data. Furthermore, the effect of the elastic modulus of aggregates on the master curves was analyzed. Acceptable agreement between dynamic modulus master curves obtained from experimental data and simulation results was achieved. However, large errors between phase angle master curves appeared at low frequencies. A method was proposed to improve the prediction of the phase angle master curve by adjusting the equilibrium modulus of the asphalt mortar.

scholarly journals DURABILITAS CAMPURAN HOT ROLLED SHEET-WEARING COURSE (HRS-WC) AKIBAT RENDAMAN MENERUS DAN BERKALA AIR ROB

2019 ◽  
Vol 1 (2) ◽  
pp. 141-154
Author(s):  
Nahyo Nahyo ◽  
Sudarno Sudarno ◽  
Bagus Hario Setiadji
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Coastal Areas ◽  
Rolled Sheet ◽  
Concrete Mixtures ◽  
Tidal Water ◽  
Durability Index ◽  
Hot Rolled ◽  
Laboratory Water ◽  
Durability Performance

Tide phenomenon that often occurs in the coastal areas of Indonesia resulted in flooding, which is called the tidal flood. A tidal flood overflow phenomenon of sea water inland. Often some of the roads located in coastal areas are flooded by tidal flood and often causing some damages to the road. Therefore it is necessary to investigate the effect caused by tidal inundation or water bath for asphalt pavement.This research aims to know the durability performance of asphalt concrete mixtures with marinade modification Marshall. The study was conducted with two standard methods of soaking in tidal water and laboratory. Water Immersion method is made by soaking continuous (continuous) and periodic (intermittent). Soaking the specimen in water tidal variation within 6 hours; 12 hours; 24 hours; 48 hours; and 72 hours. While the periodic immersion done by soaking the specimen for 12 hours, then removed during the next 12 hours during 3-days. To view the durability performance of asphalt concrete mixtures used indicator Index of Retained Stability (IRS), Stability Deformation Index, namely First Durability Index (IDP), and the Second Durability Index (IDK).The results showed that continuous immersion damage effects mix quicker on asphalt mixtures than regular immersion. Tidal water used to soak the asphalt mixture Hot Rolled Sheet-Wearing Course (HRS-WC) either continuous or periodic method, has a greater influence than the use of laboratory water. It is shown by the value of the durability of asphalt mixture soaked-tidal water smaller than water-soaked asphalt mixture laboratory standards.

scholarly journals SUBSTITUSI FILLER DENGAN LIMBAH KARBIT TERHADAP CAMPURAN ASPAL PANAS HOT ROLLED SHEET – BASE COURSE (HRS-BC)

2021 ◽  
Vol 4 (3) ◽  
pp. 519
Author(s):  
Putri Devi Pratiwi ◽  
Dwi Kartikasari
Keyword(s):  
Binding Energy ◽  
Asphalt Concrete ◽  
Research Method ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Rolled Sheet ◽  
Composition Variation ◽  
Marshall Test ◽  
Base Course ◽  
Hot Rolled

In hot asphalt mixtures, fillers are used, fillers are used as fillers between coarser aggregate particles, fillers also function to increase the binding energy (cohesion) of asphalt concrete. This study uses waste carbide as an alternative to filler in the HRS-BC asphalt mixture, this study aims to determine the results of the Marshall test, namely stability, VFWA, VMA, VIM, Flow, and MQ. This research uses experimental research method. Composition Variation The substitution of carbide waste used is 0%, 40%, 50%, and 60% of the weight of the filler. The results of the study obtained a mixture of 0% carbide waste with stability values of 871.13 kg, VFWA 75.18 kg, VMA 22.55 kg, VIM 7.01 kg, flow 3.80 mm, MQ 229.29. variation 40% stability value is 629.20 kg, VFWA 65.69 kg, VMA 25.09 kg, VIM 10.05 kg, flow 2.85 mm, MQ 226.52. variation of 50% stability value is 1011.76 kg, VFWA 72.75 kg, VMA 23.15 kg, VIM 7.72 kg, flow 2.50 mm, MQ 410.00. variation of 60% stability value is 1291.26 kg, VFWA 71.67 kg, VMA 23.41 kg, VIM 8.04 kg, flow 2.30 mm, MQ value 562.35. from the results of the study it can be concluded that the use of carbide waste at a variation of 60% is the most effective mixture according to the General Specifications Division 6: 2016 Asphalt Pavement.ABSTRAKDalam campuran aspal panas digunakan bahan pengisi filler,Filler digunakan sebagai bahan pengisi antar partikel agregat yang lebih kasar,filler juga berfungsi meningkatkan energi ikat (kohesi) pada aspal beton. penelitian ini menggunakan limbah karbit sebagai alternatif pengganti filler pada campuran aspal HRS-BC, penelitian ini bertujuan untuk mengetahui hasil pengujian marshall test yaitu stabilitas,VFWA,VMA,VIM,Flow,dan MQ. Penelitian ini menggunakan metode penelitian Eksperimen. Komposisi Variasi Substitusi limbah karbit yang digunakan sebesar 0%, 40%, 50%, dan 60% dari berat filler. hasil penelitian didapatkan campuran limbah karbit variasi 0% nilai stabilitas sebesar 871,13 kg, VFWA 75,18 kg, VMA 22,55 kg, VIM 7,01 kg, flow 3,80 mm, MQ 229,29. variasi 40% nilai stabilitas sebesar 629,20 kg, VFWA 65,69 kg, VMA 25,09 kg, VIM 10,05 kg, flow 2,85 mm, MQ 226,52. variasi 50% nilai stabilitas sebesar 1011,76 kg, VFWA 72,75 kg, VMA 23,15 kg, VIM 7,72 kg, flow 2,50 mm, MQ 410,00. variasi 60% nilai stabilitas sebesar 1291,26 kg, VFWA 71,67 kg, VMA 23,41 kg, VIM 8,04 kg, flow 2,30 mm, nilai MQ 562,35. dari hasil penelitian dapat disimpulkan bahwa penggunaan limbah karbit pada variasi 60% adalah campuran yang paling efektif sesuai Spesifikasi Spesifikasi Umum Divisi 6 : 2016 Perkerasan Aspal.

scholarly journals KARAKTERISTIK MARSHALL CAMPURAN HOT ROLLED SHEET WEARING COURSE MENGGUNAKAN BAHAN TAMBAH PLASTIK BEKAS JENIS POLYETHYLENE TEREPHTHALATE

2020 ◽  
Vol 19 (3) ◽  
pp. 179-186
Author(s):  
Yusrizal Yahya ◽  
Desriantomy . ◽  
Robby .
Keyword(s):  
Polyethylene Terephthalate ◽  
Optimum Parameter ◽  
Asphalt Mixture ◽  
Rolled Sheet ◽  
Asphalt Content ◽  
Hot Rolled ◽  
Plastic Content ◽  
Mixture Value

Abstract This study was conducted to determine the benefits of the use of polyethylene terephthalate used plastic as additives in hot asphalt mixture Hot Rolled Sheet Wearing Course. Marshall testing was carried out on specimens using polyethylene terephthalate plastic additives, with variations in the ingredients added 2%, 4%, 6%, 8%, and 10% to the weight of asphalt on specimens with Optimum Asphalt Content. Marshall parameters of test specimens generally meet the existing specifications, except the Void In Mixture value for specimens with plastic content of 8% and 10%. The optimum plastic content obtained from this study is 7.80%. Keywords: asphalt mixture, hot rolled sheet, Marshall parameters, polyethylene terephthalate  Abstrak Studi ini dilakukan untuk mengetahui manfaat penggunaan plastik bekas jenis Polyethylene Terephthalate sebagai bahan tambah pada campuran beraspal panas jenis Hot Rolled Sheet Wearing Course. Pengujian Marshall dilakukan terhadap benda-benda uji yang menggunakan bahan tambah plastik jenis Polyethylene Terephthalate, dengan variasi bahan tambah 2%, 4%, 6%, 8%, dan 10% terhadap berat aspal pada benda uji dengan Kadar Aspal Optimum. Parameter Marshall benda-benda uji umumnya memenuhi spesifikasi yang ada, kecuali nilai Void In Mixture untuk benda-benda uji dengan kadar plastik 8% dan 10%. Kadar plastik optimum yang diperoleh dari studi ini adalah 7,80%. Kata-kata kunci: campuran beraspal, hot rolled sheet, parameter Marshall, polyethylene terephthalate

Experimental Analysis of Dynamic Modulus and Phase Angle of High Modulus Asphalt Mixture

2011 ◽  
Vol 243-249 ◽  
pp. 4220-4225
Author(s):  
Rui Bo Ren ◽  
Li Tao Geng ◽  
Li Zhi Wang ◽  
Peng Wang
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Asphalt Mixture ◽  
Performance Testing ◽  
Asphalt Mixtures ◽  
Testing System ◽  
High Modulus ◽  
Temperature Performance ◽  
Different Temperatures ◽  
Confining Pressures

To study the mechanical properties of high modulus asphalt mixtures, dynamic modulus and phase angle of these two mixtures are tested with Simple Performance Testing System under different temperatures, loading frequencies and confining pressures. Testing results show the superiority of high modulus asphalt mixture in aspect of high temperature performance. Furthermore, the changing rules of dynamic modulus and phase angle are also discussed.

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