scholarly journals Laboratory Performance Evaluation of High Modulus Asphalt Concrete Modified with Different Additives

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Peng Li ◽  
Mulian Zheng ◽  
Fei Wang ◽  
Fa Che ◽  
Hongyin Li ◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Evaluation System ◽  
Performance Test ◽  
Bending Test ◽  
High Modulus ◽  
Common Values ◽  
Static Modulus ◽  
Dynamic Modulus Test ◽  
Better Than

The objective of this study is to evaluate comprehensive performance of high modulus asphalt concrete (HMAC) and propose common values for establishing evaluation system. Three gradations with different modifiers were conducted to study the high and low temperature performance, shearing behavior, and water stability. The laboratory tests for HMAC included static and dynamic modulus tests, rutting test, uniaxial penetration test, bending test, and immersion Marshall test. Dynamic modulus test results showed that modifier can improve the static modulus and the improvements were remarkable at higher temperature. Moreover, modulus of HMAC-20 was better than those of HMAC-16 and HMAC-25. The results of performance test indicated that HMAC has good performance to resist high temperature rutting, and the resistances of the HMAC-20 and HMAC-25 against rutting were better than that of HMAC-16. Then, the common values of dynamic stability were recommended. Furthermore, common values of HMAC performance were established based on pavement performance tests.

The Application of High Modulus Mixture of EME2 on Qin Lin Expressway Test Road

2013 ◽  
Vol 361-363 ◽  
pp. 1800-1804
Author(s):  
Xiao Yan Wang ◽  
Hai Sheng Zhao ◽  
Lin Wang
Keyword(s):  
Low Temperature ◽  
Dynamic Modulus ◽  
Design Method ◽  
Bending Test ◽  
High Modulus ◽  
Test Road ◽  
Low Temperature Cracking ◽  
Dynamic Modulus Test ◽  
High Dynamic ◽  
Test Result

This paper used the design method of EME high modulus HMA from France to carry out the mix design of EME2(0/14) HMA, and carried out Duriez test, HWTD, dynamic modulus test and low temperature bending test. The test result showed that this kind of HMA had excellent water resistance, high temperature rutting resistance, high dynamic modulus and low temperature cracking resistance. This EME high modulus HMA was applied in the test road on Qing Lin expressway.

scholarly journals Laboratory Study on Properties of Tire Crumb Rubber Modified Bituminous Mixture

2012 ◽  
Vol 5 ◽  
pp. 219-223
Author(s):  
Yu Ming Dong ◽  
Yi Qiu Tan
Keyword(s):  
Dynamic Modulus ◽  
Performance Test ◽  
Resilient Modulus ◽  
Viscoelastic Behavior ◽  
Crumb Rubber ◽  
Bending Test ◽  
Bituminous Mixture ◽  
Bituminous Mixtures ◽  
Dynamic Modulus Test ◽  
Mechanical Performances

Abstract: This paper investigates the laboratory properties of tire crumb rubber modified (CRM) bitumen mixture. Two types of mixtures containing two binders (pen90 bitumen; CRM bitumen) were used to produce Marshall Sample and determine optimum content. Mechanical performances of bituminous mixtures were evaluated by Chinese wheel rutting test (WRT), 3point beam bending test (3P-BBT) at low temperature, indirect tensile Strength test (ITST) at freezing-thawing cycles. Superpave gyratory compactor (SGC) specimens also were prepared for modulus test. Resilient modulus (E) data were obtained by unconfined uni-axial compression test according to the specification of China. Dynamic modulus (E★) data were obtained by Simple Performance Test (SPT). Two temperatures were used at dynamic modulus test. The results indicate that CRM bituminous mixture performs better than referenced bituminous mixture on viscoelastic behavior, rutting resistance, cracking resistance and moisture stability.

Evaluation of Fatigue Life of Asphalt Concrete From Dynamic Modulus Test

2017 ◽  
Author(s):  
Md Mehedi Hasan ◽  
Hasan M. Faisal ◽  
Biswajit K. Bairgi ◽  
A. S. M. Rahman ◽  
Rafiqul Tarefder
Keyword(s):  
Fatigue Life ◽  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Performance Testing ◽  
Fatigue Performance ◽  
Construction Sites ◽  
Reclaimed Asphalt ◽  
Wide Range ◽  
Dynamic Modulus Test ◽  
Study Laboratory

Asphalt concrete’s dynamic modulus (|E*|) is one of the key input parameters for structural design of flexible pavement according to the Mechanistic Empirical Pavement Design Guide (MEPDG). Till this day, pavement industry uses |E*| to predict pavement performance whether the material is hot mix asphalt (HMA) or warm mx asphalt or Reclaimed Asphalt Pavement (RAP) mixed HMA. However, it is necessary to investigate the correlation of |E*| with laboratory performance testing. In this study, laboratory dynamic modulus test was conducted on four different asphalt concrete mixtures collected from different construction sites in the state of New Mexico and mastercurves were obtained to evaluate dynamic modulus (|E*|) for a wide range of frequency. In addition, fatigue performance of these mixtures was predicted from the mastercurves and compared with the laboratory fatigue performance testing. Fatigue performance of these mixtures was evaluated from the four point beam fatigue test. The laboratory results show a good agreement with the predicted value from mastercurves. It is also observed from this study that the fatigue life of the asphalt concrete materials decreases with increase in |E*| value.

Characteristic Analysis of Dynamic Modulus for High Modulus Asphalt Concrete

2014 ◽  
Vol 505-506 ◽  
pp. 15-18 ◽  
Author(s):  
Xiao Long Zou ◽  
Ai Min Sha ◽  
Wei Jiang ◽  
Xin Yan Huang
Keyword(s):  
Dynamic Modulus ◽  
Testing Machine ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
High Modulus ◽  
Characteristic Analysis ◽  
Modified Asphalt ◽  
Universal Testing ◽  
Different Temperatures ◽  
Dynamic Modulus Test

In order to analyze the characteristics of high modulus asphalt mixture dynamic modulus, Universal Testing Machine (UTM-25) was used for dynamic modulus test of three kinds of mixtures, which were PR Module modified asphalt mixture and PR PLAST.S modified asphalt mixture and virgin asphalt mixture, to investigate dynamic modulus and phase angle at different temperatures and frequencies. The results indicate that: the dynamic modulus order of the three asphalt mixtures is PR MODULE > PR PLAST.S > Virgin. PR MODULE asphalt mixture dynamic modulus is much larger than the other two.

Practical Procedure for Developing Dynamic Modulus Master Curves for Pavement Structural Design

2005 ◽  
Vol 1929 (1) ◽  
pp. 208-217 ◽  
Author(s):  
Ramon Bonaquist ◽  
Donald W. Christensen
Keyword(s):  
Asphalt Concrete ◽  
Structural Design ◽  
Dynamic Modulus ◽  
Master Curve ◽  
Performance Test ◽  
Test System ◽  
Pavement Design ◽  
Master Curves ◽  
Practical Procedure ◽  
Testing Sequence

A dynamic modulus master curve for asphalt concrete is a critical input for flexible pavement design in the mechanistic–empirical pavement design guide developed in NCHRP Project 1–37A. The recommended testing to develop the modulus master curve is presented in AASHTO Provisional Standard TP62–03, Standard Method of Test for Determining Dynamic Modulus of Hot-Mix Asphalt Concrete Mixtures. It includes testing at least two replicate specimens at five temperatures between 14°F and 130°F (–10°C and 54.4°C) and six loading rates between 0.1 and 25 Hz. The master curve and shift factors are then developed from this database of 60 measured moduli using numerical optimization. The testing requires substantial effort, and there is much overlap in the measured data, which is not needed when numerical methods are used to perform the time–temperature shifting for the master curve. This paper presents an alternative to the testing sequence specified in AASHTO TP62–03. It requires testing at only three temperatures between 40°F and 115°F (4.4°C and 46.1°C) and four rates of loading between 0.01 and 10 Hz. An analysis of data collected using the two approaches shows that comparable master curves are obtained. This alternative testing sequence can be used in conjunction with the simple performance test system developed in NCHRP Project 9–29 to develop master curves for structural design.

scholarly journals Comparative Study on Complex Modulus and Dynamic Modulus of High-Modulus Asphalt Mixture

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1502
Author(s):  
Licheng Guo ◽  
Qinsheng Xu ◽  
Guodong Zeng ◽  
Wenjuan Wu ◽  
Min Zhou ◽  
...  
Keyword(s):  
Dynamic Modulus ◽  
Complex Modulus ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Design System ◽  
High Modulus ◽  
Stiffness Modulus ◽  
Two Systems ◽  
Value Range ◽  
Dynamic Modulus Test

In the French high-modulus asphalt mixture design system, the complex modulus of the mixture under the conditions of 15 °C and 10 Hz is taken as the design index. However, in China, the dynamic modulus under the conditions of 15 °C, 10 Hz, 20 °C, 10 Hz and 45 °C, 10 Hz was taken as the stiffness modulus index of high-modulus asphalt mixture. The difference in modulus values between the two systems caused the pavement structure layer to be thicker and the construction cost to be higher in China. In order to find out the appropriate modulus value of high-modulus asphalt mixture suitable for China’s modulus parameter conditions to better carry out the reasonable design and evaluation of high-modulus asphalt mixture in China, the modulus of four types of high-modulus asphalt mixtures under the two systems through the two-point bending complex modulus test of the CRT-2PT trapezoidal beam and the SPT uniaxial compression dynamic modulus test were analyzed in this paper. Under the premise of meeting the stiffness modulus index of the French high-modulus asphalt mixture, the relationship conversion models between the dynamic modulus and complex modulus of high-modulus asphalt mixture under different temperatures were established. According to the conversion models, the design evaluation value range of dynamic modulus suitable for China’s condition was recommended. It is recommended that the dynamic modulus of China’s high-modulus asphalt mixture at 15 °C and 10 Hz is not less than 16,000 MPa, the dynamic modulus at 20 °C and 10 Hz is not less than 14,000 MPa, and the dynamic modulus at 45 °C and 10 Hz is not less than 2500 MPa. Five kinds of high-modulus asphalt mixtures used in actual road engineering were tested to verify the reliability of the recommended dynamic modulus values based on the modulus conversion model, and the results are consistent with the recommended value range of the model.

Relativity Analysis between Dynamic and Static Modulus of Elasticity on Different Thickness Wood-Plastic Structural Plates

2011 ◽  
Vol 121-126 ◽  
pp. 4254-4258 ◽  
Author(s):  
Gui Wen Yu ◽  
Ying Cheng Hu ◽  
Ji You Gu
Keyword(s):  
Mechanical Properties ◽  
Nondestructive Testing ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
Bending Test ◽  
Three Point Bending ◽  
Static Modulus ◽  
Dynamic Modulus Of Elasticity ◽  
Static Modulus Of Elasticity ◽  
Different Thickness

The relativity was evaluated between dynamic modulus of elasticity (MOE) and static MOE, in order to assess the potential of using nondestructive testing (NDT) method as a checking tool for mechanical properties of wood-plastic structural plates. The dynamic MOE was evaluated on a FFT system, and the static MOE was determined by three point bending test. All of specimens were made of polyethylene（PE）and poplar flour. A significant correlation between the dynamic MOE and the static MOE was obtained from relativity analysis. These results suggest that the NDT method could be appropriate to estimate the dynamic MOE of specimens with different thickness.

Effects of Conductive Fillers on the Dynamic Response and Fatigue life of Conductive Asphalt Concrete

2007 ◽  
Vol 348-349 ◽  
pp. 145-148 ◽  
Author(s):  
Shao Peng Wu ◽  
Bo Li ◽  
Jian Qiu ◽  
Ning Li
Keyword(s):  
Fatigue Life ◽  
Asphalt Concrete ◽  
Dynamic Modulus ◽  
Load Cycle ◽  
Initial Crack ◽  
Asphalt Pavements ◽  
Negative Effects ◽  
Cycle Times ◽  
Dynamic Modulus Test ◽  
Conductive Fillers

It is currently interesting to use thermal or electrical conductive asphalt concrete for snow-melting and maintenance of asphalt pavements in winter. The addition of conductive fillers may have negative effects on the mechanical properties of asphalt concrete. The performance of conductive asphalt concrete is greatly affected by the initial crack and its propagation. Laboratory tests for neat and conductive asphalt concrete include Dynamic Modulus Test (DMT) and Indirect Tensile Fatigue Test (ITFT). DMT tests indicates that the value of dynamic modulus of asphalt concrete decreases with the increasing graphite content. It means that the conductive asphalt concrete achieves lower stiffness. It can be concluded from ITFT tests that the fatigue life (load cycle times) of conductive asphalt concrete is more than neat ones when stress level is under 1.0 MPa. Meanwhile higher fatigue resistance of conductive asphalt concrete is observed when carbon fibers (2 weight % of total aggregate) were added together with 22% graphite, especially at low stress levels.

The Property Research on Interfacial Modificated Semi-Flexible Pavement Material

2011 ◽  
Vol 71-78 ◽  
pp. 1090-1098
Author(s):  
Yan Yang ◽  
Shao Long Huang ◽  
Qing Jun Ding ◽  
Xin Yan Peng
Keyword(s):  
Shear Strength ◽  
Fatigue Life ◽  
Low Temperature ◽  
Dynamic Modulus ◽  
Stress Ratio ◽  
Flexible Pavement ◽  
Bending Test ◽  
Interfacial Modification ◽  
Dynamic Modulus Test ◽  
Interfacial Modifier

Based on shearing test, bending test in low temperature, fatigue test and dynamic modulus test, the text researched the effect on the property of the semi-flexible pavement by a kind of interfacial modifier. The study showed the feasible content of interfacial modifier was 0.4～0.6% . Used 0.4%, the shear strength reached 1.83MPa, flexural strength 6.97MPa, and fatigue-life was over 40000 at 0.2 stress ratio. From interfacial modification, the synthesis property of semi-flexible pavement was especially perfect.

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