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Showing 1 to 20 of 63 for “"dynamic modulus"”.
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On Dynamic Modulus of Asphalt Concrete for Moisture Damage
Dynamic modulus (E*) test has gained substantial acceptance in recent years for evaluating Hot Mix Asphalt (HMA) rutting and fatigue cracking performances. Indeed, the recently developed Mechanistic Empirical Pavement Design Guide (MEPDG) uses E* data for stress and strain calculation, and E*-based …
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The Effect of High RAP and High Asphalt Binder Content on the Dynamic Modulus and Fatigue Resistance of Asphalt Concrete
… of RAP and asphalt binder contents on the dynamic modulus and fatigue resistance of asphalt concrete. Two RAP percentages (20% and 40%) and three binder percentages (plant-mixed, plant-mixed + 0.5%, and plant-mixed + 1.0%) were evaluated. A Superpave gyratory compactor and an asphalt …
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A study of the effect of cracks on the resonant frequency and dynamic modulus of elasticity of insulating brick by the dynamic testing method
… standard fire brick will cause a lowering of the dynamic modulus of elasticity calculated.
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Analysis of Hot Mix Asphalt (HMA) Linear Viscoelastic and Bimodular Properties Using Uniaxial Compression and Indirect Tension (IDT) Tests
… (M-E) flexible pavement design is the dynamic complex modulus obtained from either the uniaxial or triaxial compressive dynamic modulus test. Furthermore, as part of the performance-based mix design process, the triaxial dynamic modulus has been selected to predict rutting and fatigue …
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Characterization of High Porosity Drainage Layer Materials for M-E Pavement Design
… The modified test protocols to determine the dynamic modulus of the drainage layer materials have been provided, which can be followed to determine the dynamic modulus of the drainage layers as level 1 input in Mechanistic-Empirical (M-E) pavement design. The measured dynamic moduli have been …
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Exploring the Black Space of Compressive and Shear Modulus
<p>Uniaxial dynamic modulus is a standard test used to determine the viscoelastic behavior of asphalt pavement materials, with the standard analysis generating a Master Curve. One alternative to the master curve approach is a Black Space diagram, which is a rheological plot that can delineate …
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Performance Characterization of Recycled Asphalt Pavements with Warm Mix Asphalt Technologies
… mixtures were evaluated for moisture resistance, dynamic modulus, rutting resistance and thermal resistance behavior. Moisture resistance of the mixtures were evaluated by performing the indirect tensile strength test for 0 and 1 freeze-thaw cycles. Resistance to rutting was evaluated by …
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Hveem Mix Design and Engineering Properties of Cold In-Place Recycling Mixtures
… sensitivity of CIR mixtures, c) determine the dynamic modulus (E*) master curves of CIR mixtures, d) evaluate the resistance to permanent deformation of CIR mixtures, and e) conduct a mechanistic-empirical analysis of rutting performance to determine layer coefficients for CIR mixtures.CIR mix …
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Developing a Design Procedure for Pavement Millings for New and Rehabilitated Unpaved Gravel Roads
… identified in the Douglas County area. Resilient modulus (MR) for the subgrade sources were obtained based on AASHTO T-307. The milling surfaced roads are made of 100% RAP millings without any binder or recycling agent. It is a specialized case to investigate the behavior of RAP material for this …
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Laboratory Evaluation of Warm Mix Asphalt Mixtures in South Dakota, USA
… WMA temperatures and short-term conditioning.* Dynamic modulus results showed that, on average, WMA mixtures had significantly lower dynamic modulus values than HMA mixtures, but similar values to HMA mixtures produced at the WMA temperature and short-term conditioning.
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Laboratory Comparison of Full Depth Reclamation Stabilization Techniques Using Arkansas Field Materials
… foam samples, performance testing included dynamic modulus in indirect tension mode, creep compliance, semi-circular bend, and indirect tensile strength. The cement stabilized samples were tested using the tube suction test and the semi-circular bend test. Results indicated dynamic modulus …
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A Laboratory Study on the Effect of High Rap and High Asphalt Binder Content on the Performance of Asphalt Concrete
… evaluated based on three criteria: stiffness (dynamic modulus), fatigue resistance (flexural beam), and rutting resistance (flow number). Results showed that a 0.5% increase in binder content improved both the fatigue and rutting resistance of the 0% and 20% RAP mixes with only slight decreases …
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Fractionated reclaimed asphalt pavement as a coarse aggregate replacement in a ternary blended concrete pavement
… to the strength properties, both the static and dynamic elastic moduli decreased with increasing FRAP content. The elastic modulus was reduced by 30% at 50% FRAP while the dynamic modulus decreased by 46% (at 4C) with 50% FRAP replacement. At 21C, the dynamic modulus was about 15% higher than the …
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Performance Evaluation of Asphalt Mixtures with Tire Rubber Modified Binder
… of HMAC mixtures was evaluated by means of dynamic modulus master curves, fatigue cracking, permanent deformation, and reflective cracking resistance. Dynamic modulus tests were conducted using the Asphalt Mixture Performance Tester (AMPT) device and the master curves were built using AASHTO …
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Effects of Coarse Aggregate Morphological Characteristics on Mechanical Performance of Stone Matrix Asphalt
… Test included wheel-track loading, dynamic modulus, flow number, and beam fatigue. The wheel tracking test included asphalt pavement analyzer (APA) and Model mobile load simulator (MMLS). In the APA test, samples included eight types of SMA mixtures that consisted of aggregates of 22 …
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Dynamic Analysis for Characterization of Novel Biomass Based Composities
… of the bio-composites, comparison between dynamic modulus of elasticity under flexural vibration and Young's modulus, variation in Poisson's ratio were studied.</p>
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Mechanical and surface free energy characterization of asphalt concrete for moisture damage detection
… tests are the modified AASHTO T-283 and dynamic modulus tests. The surface free energy (SFE), direct adhesion test (DAT) and blister test (BT) represent the component-level types. Samples for the mixture-level tests were prepared at different aging and conditioning durations. Aging …
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Evaluation and modeling of repeated load test data of asphalt concrete for mechanistic-empirical flexible pavement design
… (MEPDG) uses a power model that incorporates Dynamic Modulus (DM) as a factor in predicting rutting performance of asphalt concrete. The rutting model is empirical and the rutting profiles obtained from the model are largely based on the adjustment of calibration constants not the DM. Various …
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Characterizations of concretes with alkali-activated binder and correlating their properties from micro- to specimen level
… optimizations. The test results showed that Ms modulus (precursor-activator ratio) of 1.4 provided the best compressive strengths when cured for 24 hours at temperatures of 20°C, 40°C and 60°C. The compressive strength of AAB concrete was in the range of 20.9 to 85.0 MPa (3030 to …
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Mechanistic-Empirical Modeling of Permanent Deformation in Asphalt Concrete Layers
… the demonstrated inaccuracy of the predicted dynamic modulus at level 3 compared with measured level 1 results, and the M E PDG calibration at level 3. The CalME underestimated the permanent deformation in the semi-rigid section due to its response modeling sensitivity to overall pavement …
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