The stiffness of asphalt mixes is a fundamental property that plays an important role in determining the performance of asphalt pavement under traffic loading. The resilient modulus (stiffness) of asphalt mixes can be either determined using laboratory experiments or predicted through empirical methods based on asphalt components’ properties.

Get PriceResilient and dynamic modulus tests were performed at five temperatures on two typical mixes used in the Commonwealth of Virginia to compare the test result. The dynamic modulus was measured at six frequencies at each of the testing temperatures, and the resilient modulus test was performed at

Get Priceto establish the resilient, strength, and permanent deformation prop erties. This study focuses on the resilient properties of the asphalt rubber mixtures obtained from those field cores. MIX TYPES USED Thirteen types of asphalt rubber mixes and one conventional con trol were used in this study (2). Among these were six wet process,

Get PriceRESILIENT MODULUS AND THE FATIGUE PROPERTIES OF KANSAS HOT MIX ASPHALT MIXES Stefan A. Romanoschi, Ph.D., P.E. Nicoleta I. Dumitru Octavian Dumitru ... fatigue life while having similar dynamic moduli with those of mixes with unmodified binders. The measured dynamic moduli on all four mixes were, in most cases, more than two times the dynamic ...

Get PriceResilient Modulus of Asphaltic Concrete Mixes }AMAL A. ALMUDAIHEEM AND FAISAL H. AL-SUGAIR The diametral resilient modulus test is a procedure by which the resilient or elastic modulus of asphalt mixes can be determined. The resilient modulus is used as a fundamental input parameter in the layer theory for flexible pavements design.

Get PriceThe base asphalt cement has the lowest resilient modulus with 3528 mPa among the mixtures, while 5% Al 2 O 3 have the highest resilient modulus 5082 mPa compared with other modified asphalt mixture samples as shown in Fig. 8.7. The improvement in resilient modulus at 25°C for

Get Price2018-1-15 3.2. Tensile and compressive resilient moduli test by four-point bending method3.2.1. Calculation formula. The new tensile and compressive resilient moduli calculation models of four-point bending method were derived respectively on the basis of combining the equilibrium condition and the plane hypothesis in elastic mechanics , , the tensile and compressive strains used in the derivation ...

Get Price2013-12-2 Effect of rest period on resilient modulus of asphalt concrete Effect of the ratio of rest period to the loading duration (R/D) on the resilient modulus of asphalt mixtures at three different temperatures (5, 25, and 40 Â°C) and loading durations (0.01, 0.1 and 1 sec.) with respect to square and haversine waveform is given in Table 3.

Get PriceEffect of loading history parameters on resilient modulus (Mr) of the two types of asphalt mixes was investigated. • At 25 and 40 °C, the asphalt mixes Mr at frequency of 1 Hz could be about one-fourth of that at the frequency of 10 Hz.. The beneficial effect of SBS-modification on Mr greatly depends on temperature, loading frequency and waveform.

Get PriceComparisons of the Resilient Moduli of Asphalt Mixes Containing Recycled Materials through Empirical and Experimental Methods Farzaneh Tahmoorian, John Yeaman and Mehdi Mirzababaei Analysis of Pore Characteristics and Flow Pattern of Open-Graded Asphalt Mixture in Different Directions Jun Chen, Junpeng Wang, Hao Wang, Pengyu Xie and Lukai Guo

Get Price2017-1-30 Based on the standard resilient modulus test for asphalt concrete, the resilient modulus is the ratio of an applied cyclic load to the recoverable horizontal strain of a test sample. The plastic strain occurring while applying a load in any waveform in a vertical direction, with a given rest period, is usually ignored (Huang 2004).

Get PriceComparing Resilient Modulus and Dynamic Modulus of Hot-Mix Asphalt as Material Properties for Flexible Pavement Design. Download. Related Papers. Development of dynamic modulus master curves for hot-mix asphalt with abbreviated testing temperatures. By alex apeagyei.

Get PriceThis study aims to examine whether the dynamic modulus which is converted from a resilient modulus test is different to the resilient modulus when considering as a modulus input for pavement design. Three different asphalt concrete mixes, with varying maximum aggregate sizes of 7, 10, and 14 mm were selected as mix representatives.

Get PriceWith the current trend toward developing mechanistic flexible pavement design and the need for more reliable design procedures, accurate characterization of hot-mix asphalt (HMA) properties is needed. Resilient and dynamic modulus tests were

Get PriceFor Bit B mixes, the inertia modulus is as much as 3.8 times greater than laboratory resilient modulus, while for Bit C mixes, the inertia modulus is up to 2.5 times the laboratory resilient modulus.Overall, the testing program highlights the wide variability of the mechanical response of asphalt mixes and the need for better understanding and ...

Get Priceto establish the resilient, strength, and permanent deformation prop erties. This study focuses on the resilient properties of the asphalt rubber mixtures obtained from those field cores. MIX TYPES USED Thirteen types of asphalt rubber mixes and one conventional con trol were used in this study (2). Among these were six wet process,

Get PriceEstimation of Fatigue Life Using Resilient Moduli of Asphalt Mixtures. The objective of this study was to determine the fundamental resilient moduli (Mr) parameters of four asphalt-rubber gap-graded (AR-gap), one asphalt-rubber open-graded (AR-open), four polymer-modified gap-graded (P-gap), and two conventional dense graded asphalt concrete (DGAC) mixes at various temperatures and frequencies ...

Get Price2018-1-1 Resilient modulus is defined as the ratio of the applied stress to the recoverable strain , .The resilient modulus of the BRA modified asphalt mixtures at 25 °C was statistically significantly higher than that of the unmodified asphalt mixtures as illustrated in Fig. 3.Comparison of the resilient modulus of unmodified and BRA modified asphalt mixtures, showed that the resilient modulus for ...

Get Price2016-1-28 The objective of this study was to determine the fundamental resilient moduli (M r) parameters of four asphalt-rubber gap-graded (AR-gap), one asphalt-rubber open-graded (AR-open), four polymer-modified gap-graded (P-gap), and two conventional dense-graded asphalt concrete (DGAC) mixes at various temperatures and frequencies using ASTM D7369-11 ...

Get PriceAn exponential model was proposed for the temperature dependency of the dynamic and resilient moduli of asphalt mixtures. Additionally, thirteen temperature correction factor models for FWD ...

Get Price2017-1-30 Based on the standard resilient modulus test for asphalt concrete, the resilient modulus is the ratio of an applied cyclic load to the recoverable horizontal strain of a test sample. The plastic strain occurring while applying a load in any waveform in a vertical direction, with a given rest period, is usually ignored (Huang 2004).

Get PriceThis study aims to examine whether the dynamic modulus which is converted from a resilient modulus test is different to the resilient modulus when considered as a modulus input for pavement design. Three different asphalt concrete mixes, with varying maximum aggregate sizes of 7, 10, and 14 mm were selected as mix representatives.

Get PriceTo make the analysis more comparative, AC-layer and Asphalt permeable base were set the same key input parameters for E*, G* and δ; The seasonal resilient modulus (M R ) input of granular base ...

Get PriceFor Bit B mixes, the inertia modulus is as much as 3.8 times greater than laboratory resilient modulus, while for Bit C mixes, the inertia modulus is up to 2.5 times the laboratory resilient modulus.Overall, the testing program highlights the wide variability of the mechanical response of asphalt mixes and the need for better understanding and ...

Get Price2018-3-9 measure the resilient modulus of asphalt mixes. There is limited information on the precision of this test as presented in the ASTM standard or as published in other literature. Review and Analysis of Resilient Modulus Test (ASTM D 4123) ASTM D 4123 recommends a total of three laboratory fabricated specimens or three cores be

Get Price2018-1-1 Resilient modulus is defined as the ratio of the applied stress to the recoverable strain , .The resilient modulus of the BRA modified asphalt mixtures at 25 °C was statistically significantly higher than that of the unmodified asphalt mixtures as illustrated in Fig. 3.Comparison of the resilient modulus of unmodified and BRA modified asphalt mixtures, showed that the resilient modulus for ...

Get Price2011-1-7 resilient modulus value does not change significantly with applied tensile stress. It is also observed that a mere 0.3% incorporation of binder results in considerable increase of the resilient moduli and fatigue life of the mixes, which is an added advantage to the paving industry. REFERENCES 1. Abdul Khalil, H.P.S., Alwani, M.S. and Mohd Omar,

Get PriceThere are various moduli to characterise the structural performance and behaviour of asphalt mixes. For example, the compressive dynamic modulus (E*) is a primary characteristic of the mix in the analysis of the pavement. It is also a useful indicator of viscoelastic behaviour of the asphalt surfaces.

Get PriceBased on these backgrounds in mind, the resilient modulus test of asphalt concrete was conducted by two laboratories. The resilient modulus test results demonstrated that the moduli values determined from the calculated Poisson's ratio showed greater difference between the laboratories than those from the assumed Poisson's ratio.

Get Price2021-8-12 The measured dynamic moduli on all four mixes were, in most cases, more than two times the dynamic moduli predicted by the NCHRP Design Guide. At the same temperatures and at the same loading frequency of 10 Hz, the measured dynamic moduli were more than two times larger than the corresponding bending stiffness.

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