Nondestructive tests of road pavements are among the most widely used methods pavement condition diagnostics. Deflections under a known load commonly measured in such tests, e.g., with use falling weight deflectometer (FWD). Measured values allow to determine material parameters structure, corresponding obtained results, by means backcalculations. Among factors that impact on quality results is accuracy deflection measurement. Deflection basins small differences displacement may correspond...

Abstract The aim of the study is to compare flexible pavement design lifespans and main factors which create their values for a standard structure one with an anti-fatigue course AF at different parameter its load, relevant processes. Depending on mixture used or thickness, durability improvement (compared structure) can be obtained by extending lifespan asphalt base course. On sections predominantly slow traffic, decreases significantly compared typical vehicle speed - relative decrease...

The paper concerns the comparison of deflections and key strains when dimensioning two variants flexible road pavement loaded with heavy traffic, differing only in thickness asphalt base course. article shows impact on values compared quantities slow loading braking movement traffic seasonal temperature layers. Moreover, it presents application viscoelastic models (Bürgers Huet-Sayegh) elastic model these It has been proven that relative change analysed modifying course does not depend or...

This paper analyses the key strains and fatigue performance of following types road pavements using cracking subgrade rutting as evaluation criteria: conventional asphalt pavement structure with fatigue-resistant layer (as in perpetual concept). Calculations were performed for two wheel speeds: 60 km/h 5 km/h. The study included a comparison results obtained differing terms material specifications structure: reference model built only elastic layers models viscoelastic aggregate...

The paper presents three methods for defining a finite cylindrical-type domain element analysis of an elastic multi-layered half-space subjected to rotationally symmetric vertical load distributed over circular area, thus providing mechanistic model flexible road pavement. For sets boundary conditions the ensure consistency between maximum deflection and exact calculated value with compromising accuracy key strain values. first case uses standard support at boundaries – fixed in direction...

The article investigates the impact of applying a dynamic computational model that considers inertia forces on pavement deflections under rapidly changing loads over time. This study is particularly relevant to modelling falling weight deflectometer (FWD) testing. Initially, examines deflection values obtained from models with varying frequencies. In this context, considering was significant for load durations shorter than 0.04 s. such cases, results static and analyses differed...

Since 2009, SBS (styrene-butadiene-styrene) polymer-modified binders (HiMA—Highly Modified Asphalt) have been tested worldwide. Highly modified are characterized by extraordinary properties resulting from the reversal of binder-polymer phase. This contributes to very good test results for asphalt mixes. The use such a modern binder poses challenge in terms structure design, mainly due lack recognized and calibrated method suitable this material. article proposes new approach pavement fatigue...

Summary Pavements made of cement concrete, used for road constructions, are damaged during use. This applies to both the pavements rural and forest roads with very low traffic loads, as well high loads. One most effective ways repairing concrete is through placing an asphalt overlay on a slab. In order increase fatigue life overlay, mixtures modified fibres. technological solution use FRP (Fiber Reinforced Polymer), innovative material improved properties. The aim this paper assess impact...

Abstract A review of mechanical models road pavements in the form a proposal classification these is presented. It assumed an autonomy following elements pavement model: structural layers, subgrade model, interlayer bonding models, including structure with its subgrade, external impacts on load heavy traffic, environment layers’ borders (lateral) and (including lower one) – according to selected criteria such as criterion, material criterion (physical criterion), dimension model scope...