The behaviour of an asphalt concrete structure subjected to severe loading, such as blast and impact loadings, is becoming critical for safety and anti-terrorist reasons. With the development of high-speed computational capabilities, it is possible to carry out the numerical simulation of an asphalt concrete structure subjected to blast or impact loading. In the simulation, the constitutive mod...

To accurately estimate the dynamic properties of asphalt mixtures to be used in Mechanistic-Empirical Pavement Design Guide (MEPDG), a novel neural computing model using improved beetle antennae search was developed. Asphalt were designed conventionally by eight types aggregate gradations and two binders. The modulus (DM) tests conducted under 3 temperatures loading frequencies construct 144 da...

Fatigue cracking of viscoelastic asphalt composite materials is one the major distresses in pavements. To quantify weakening effect fatigue cracks on mechanical properties materials, this study takes an asphalt-filler system as example, and micromechanics models are proposed by combining Eshbely’s equivalent inclusion theory Mori-Tanaka approach. Dynamic shear rheometer (DSR) tests performed sy...

The methodology of the research that was used to evaluate comparative results surface mixes with a nominal maximum aggregate size 12.5mm is presented in this paper. Also are recommended Ndes values for C-level and D-level mixes, which designed handle traffic levels 3-30 Million greater than 30 ESALs, respectively. In order determine amount asphalt present, concrete were fabricated utilizing Sup...

seismic behavior of a rockfill dam with asphalt-concrete core has been studied utilizing numerical models with material parameters determined by laboratory tests. the case study selected for these analyses, is the meyjaran asphalt core dam, recently constructed in northern iran, with 60 m height and 180 m crest length. the numerical analyses have been performed using a nonlinear three dimension...

In anticipation of the introduction of high modulus materials in the Swiss standards, a research project has been carried out for the evaluation of these bituminous mixtures. These mixtures make possible to reduce rut in base courses. With a temperature of 50°C, three test sections (two with high modulus and one with a reference material for base layer), were built in a building for ALT and wer...

Low-temperature cracking is one of the most common road pavement distress types in Poland. While bitumen performance can be evaluated in detail using bending beam rheometer (BBR) or dynamic shear rheometer (DSR) tests, none of the normalized test methods gives a comprehensive representation of low-temperature performance of the asphalt mixtures. This article presents the Bending Beam Creep test...

To further reveal the road performance and noise reduction of open-graded friction course (OGFC), crumb rubber prepared by adding waste tires were considered, requirements material put forward. avoid influence particle swelling on aggregate, special gradation mix proportion OGFC mixture designed, size 4.75 mm was proposed as control size. The test results show that aggregate forms a good embedd...

a r t i c l e i n f o Cold recycling technique represents the most environmental friendly solution for pavement rehabilitation nowadays. In fact, this technique allows the use of the highest percentage of reclaimed asphalt avoiding the energy consumption related to aggregates heating required by the traditional hot mix asphalt design. The mix design represents a key phase of the cold mix produc...