### HIRSCH MODEL FOR ESTIMATING THE MODULUS OF

2003-3-10 The purpose of this paper is to present a new, rational and effective model for estimating the modulus of asphalt concrete using binder modulus and volumetric composition. The model is based upon an existing version of the law of mixtures, called the Hirsch model, which combines series and parallel elements of phases.

Get price### Hirsch model for estimating the modulus of asphalt ...

The purpose of this paper is to present a new, rational and effective model for estimating the modulus of asphalt concrete using binder modulus and volumetric composition.

Get price### HIRSCH MODEL FOR ESTIMATING THE MODULUS OF

The purpose of this paper is to present a new, rational and effective model for estimating the modulus of asphalt concrete using binder modulus and volumetric composition. The model is based upon an existing version of the law of mixtures, called the Hirsch model, which combines series and parallel elements of phases. In applying the Hirsch model to asphalt concrete, the relative proportion of ...

Get price### Christensen, D.W. (2003) Hirsch Model for Estimating the ...

Christensen, D.W. (2003) Hirsch Model for Estimating the Modulus of Asphalt Concrete. Journal Association of Asphalt Paving Technologists, 72, 97-121. has been cited by the following article: TITLE: Development of a Dynamic Modulus Prediction Model for Hot Mixture Asphalt and Study of the Impact of Aggregate Type and Its Electrochemical Properties

Get price### Improved Hirsch Model for Estimating the Modulus of Hot ...

This paper presents an improved version of the Hirsch model for estimating the modulus of hot-mix asphalt (HMA) from asphalt binder modulus and mixture composition. The original Hirsch model was...

Get price### Improved Hirsch model for estimating the modulus of hot ...

2015-3-8 Improved Hirsch model for estimating the modulus of hot-mix asphalt. This paper presents an improved version of the Hirsch model for estimating the modulus of hot-mix asphalt (HMA) from asphalt binder modulus and mixture composition. The original Hirsch model was developed in 2002 and has been shown by several independent researchers to be ...

Get price### EVALUATION OF THE HIRSCH MODEL FOR DYNAMIC

2017-6-11 EVALUATION OF THE HIRSCH MODEL FOR DYNAMIC MODULUS ESTIMATION OF ASPHALT MIXTURES HASSAN MALEKZEHTAB and HAMID NIKRAZ Civil Engineering Dept, Curtin University, Perth, Australia The dynamic modulus of the asphalt mixtures is an important factor in designing or analyzing an asphalt concrete pavement, but it is expensive and time consuming to

Get price### Estimation of Asphalt Concrete Modulus Using the ...

Estimation of Asphalt Concrete Modulus Using the Ultrasonic Pulse Velocity Test ... An attempt was made to combine the UPV modulus prediction with the Witczak and Hirsch models to improve moduli estimation at low reduced frequencies. Typical mechanical test methods are time consuming and require an expensive load frame and instrumentation setup.

Get price### EVALUATION OF RESILIENT MODULUS ESTIMATION

2010-7-21 EVALUATION OF RESILIENT MODULUS ESTIMATION METHODS FOR ASPHALT MIXTURES BASED ON LABORATORY MEASUREMENTS Demirci, Canser M.S., Department of Civil Engineering Supervisor: Assoc. Prof. Dr. Murat Güler April 2010, 69 Pages Resilient modulus is a property for bound and unbound pavement materials

Get price### Micromechanics-based analysis for predicting asphalt ...

2010-6-1 The elastic modulus of asphalt concrete (AC) is an important material parameter for pavement design. The prediction and determination of elastic modulus, however, largely depends on laboratory tests which cannot reflect explicitly the influence of the microstructure of AC. To this end, a micromechanical model based on stepping scheme is adopted. Consideration is given to the influence

Get price### Hirsch model for estimating the modulus of asphalt

2020-9-7 Hirsch model for estimating the modulus of asphalt concrete 所属领域 材料科学 复合材料 动态模量 沥青混凝土 杨氏模量 弹性模量 体积模量 矿物骨料空隙 切线模量 ...

Get price### EVALUATION OF THE HIRSCH MODEL FOR DYNAMIC

2017-6-11 EVALUATION OF THE HIRSCH MODEL FOR DYNAMIC MODULUS ESTIMATION OF ASPHALT MIXTURES HASSAN MALEKZEHTAB and HAMID NIKRAZ Civil Engineering Dept, Curtin University, Perth, Australia The dynamic modulus of the asphalt mixtures is an important factor in designing or analyzing an asphalt concrete pavement, but it is expensive and time consuming to

Get price### Improved Hirsch model for estimating the modulus of hot ...

2015-3-8 Improved Hirsch model for estimating the modulus of hot-mix asphalt. This paper presents an improved version of the Hirsch model for estimating the modulus of hot-mix asphalt (HMA) from asphalt binder modulus and mixture composition. The original Hirsch model was developed in 2002 and has been shown by several independent researchers to be ...

Get price### Estimation of Asphalt Concrete Modulus Using the ...

Estimation of Asphalt Concrete Modulus Using the Ultrasonic Pulse Velocity Test ... An attempt was made to combine the UPV modulus prediction with the Witczak and Hirsch models to improve moduli estimation at low reduced frequencies. Typical mechanical test methods are time consuming and require an expensive load frame and instrumentation setup.

Get price### Estimation of asphalt concrete modulus using the ...

The UPV test requires less time, and the equipment needed is relatively inexpensive. Using the UPV test in combination with either the Witczak or Hirsch model is recommended as a lower-cost alternative to develop the master curves of the HMA dynamic moduli. KW - Dynamic modulus. KW - Hirsch model. KW - Poisson's ratio. KW - Ultrasonic pulse ...

Get price### A new empirical model for predicting complex modulus of ...

2021-1-1 Christensen et al., proposed a predictive model called Hirsch model for estimate E* of AC through the use of asphalt binder modulus and volumetric composition. In fact, the comparison study, conducted by Sakhaeifar et al. [9] concluded that both NCHRP 1-40D and Hirsh models produce inaccurate results at low and high E* values.

Get price### Sensitivity analysis of complex shear modulus using Hirsch ...

2019-6-13 The present work evaluates the factors that affecting estimation of the Complex Shear Modulus (G*) of a binder when this estimation is done through an indirect approach: the Hirsch model. This technique consists of (i) testing specimens for dynamic modulus (E*) and (ii) back calculating the G* using the Hirsch model. To this purpose, four virgin asphalt binders were performance-graded with ...

Get price### Measured Versus Predicted Dynamic Modulus of Asphalt ...

The dynamic modulus (E*) of Asphalt Concrete (AC) is the primary material property used in asphalt pavement design. However, the testing of dynamic ... Christensen, D. W., T. K. Pellinen, and R. F. Bonaquist. 2003. Hirsch Model for Estimating the Modulus of Asphalt Concrete. Journal of Association Asphalt Paving Technologists, Vol. 72, pp. 97 ...

Get price### Measured versus Predicted Dynamic Modulus of Asphalt ...

Abstract. The dynamic modulus (E*) of Asphalt Concrete (AC) is the primary material property used in asphalt pavement design.However, the testing of dynamic modulus of AC is very expensive considering time, equipment and skills. This is why, instead of conducting the laboratory testing, the available regression equations in the literature are very often used to determine the dynamic modulus of AC.

Get price### COMPLEX MODULUS PREDICTION OF ASPHALT

2021-5-13 Complex modulus is one of the key parameters in the Mechanistic-Empirical Pavement Design Guide (MEPDG). The purpose of this study is to implement an accurate and high-efficiency mechanical method to measure and calculate the complex modulus gradient of asphalt concrete cores in different field locations. Because field

Get price### Estimation of asphalt concrete modulus using the ...

The UPV test requires less time, and the equipment needed is relatively inexpensive. Using the UPV test in combination with either the Witczak or Hirsch model is recommended as a lower-cost alternative to develop the master curves of the HMA dynamic moduli. KW - Dynamic modulus. KW - Hirsch model. KW - Poisson's ratio. KW - Ultrasonic pulse ...

Get price### Estimation of the Stiffness of Asphalt Mastics Using ...

Mastic properties are very important to the performance of asphalt concrete. Fine and coarse aggregates are usually not directly interacting with asphalt binder but with mastics. ... This study targets at estimating the shear stiffness of mastics using the complex shear modulus of binder and the Hirsch model based on binder modulus and the ...

Get price### A New Simplistic Model for Dynamic Modulus

2008-9-5 presented a modified Hirsch model for predicting dynamic modulus of asphalt concrete based on the law of mixtures (6). These researchers modified the original Hirsch model (7) to a relatively simple version for estimating complex modulus and phase angle of asphalt concrete under shear and compression loading.

Get price### (PDF) Comparing Witczak NCHRP 1-40D with Hirsh E ...

Christensen et al. modified the original Hirsch model to a relatively simple version for estimating the complex modulus and phase angle of asphalt concrete under shear and compression [3]. In the modified Hirsch model, the relative proportion of material in parallel arrangement, which is called the contact volume, is not constant but varies ...

Get price### Measured Versus Predicted Dynamic Modulus of Asphalt ...

The dynamic modulus (E*) of Asphalt Concrete (AC) is the primary material property used in asphalt pavement design. However, the testing of dynamic ... Christensen, D. W., T. K. Pellinen, and R. F. Bonaquist. 2003. Hirsch Model for Estimating the Modulus of Asphalt Concrete. Journal of Association Asphalt Paving Technologists, Vol. 72, pp. 97 ...

Get price### Modification of the Hirsch Dynamic Modulus Prediction ...

The dynamic modulus of an asphalt mixture plays a crucial role in pavement design and performance prediction of asphalt pavement. Among many predictive models, the semiempirical Hirsch model is one of the most popularly used dynamic modulus prediction models.

Get price### Industry Use of the AMPT - Purdue University College of ...

2013-1-25 Characteristic Curve of Asphalt Concrete from Direct Tension Cyclic Fatigue Tests . Cyclic Fatigue Direct Tension Cyclic Fatigue . January 2013 10 . ... R.F., “Hirsch Model for Estimating the Modulus of Asphalt Concrete,” Proceedings of the Association of Asphalt Paving Technologists, Vol. 72, 2003, pp 97-121 .

Get price### Advanced approaches to hot-mix asphalt dynamic

2020-10-13 The Hirsch E* model for HMA was developed to serve as a tool for analyzing the effect of changes in air voids, voids in mineral aggregate (VMA) and other volumetric mix factors on the modulus of asphalt concrete and related mechanical properties (Christensen et al. 2003).

Get price### Neural Network Based Model to Estimate Dynamic

Hirsch model for estimating the modulus of asphalt concrete. J Assoc Asph Paving Technol 2003;72. [9] Singh D, Zaman M, Commuri S. Evaluation of Predictive Models for Estimating Dynamic Modulus of HMA Mixtures Used in Oklahoma 2010.

Get price### COMPLEX MODULUS PREDICTION OF ASPHALT

2021-5-13 Complex modulus is one of the key parameters in the Mechanistic-Empirical Pavement Design Guide (MEPDG). The purpose of this study is to implement an accurate and high-efficiency mechanical method to measure and calculate the complex modulus gradient of asphalt concrete cores in different field locations. Because field

Get price