The Strategic Highway Research Program (SHRP) II R21 Composite Pavement Project test track constructed at University of California Center (UCPRC) ATIRC facility has yielded significant Portland cement concrete (PCC) temperature data over the nearly past two years testing. nine different sections consisted combinations plain and hot mix asphalt (HMA) overlaid jointed (JPCP) pavement varying thicknesses. Over 135 thermo couples were placed five depths three locations within each slab have been...

This study aims to validate the large-scale application of self-sensing concrete in airport runway pavements and use electrical resistance tomography (ERT) for characterizing spatially distributed damage during accelerated pavement testing. not only retains expected mechanical properties typical pavements, but it can also sense deformation strain. First, sensing were encoded by modifying cement-aggregate interface with multi-walled carbon nanotube (MWCNT) thin films. MWCNT films spray-coated...

Oxidative aging is caused by oxygen diffusion into the binder when an asphalt pavement exposed to atmosphere. Aging can lead increased susceptibility damage (i.e., raveling, cracking, and moisture damage). Investigation of mechanism advances understanding these distresses, prediction progress improves structural design performance. Previous studies have proposed a dual-rate model that divides short, fast-rate phase long constant phase. This paper further investigates rate unmodified, polymer...

Jointed plain concrete (JPC) pavement slab curling and joint movement have been shown to play a major role in the cracking performance of conventional JPCP pavements composite HMA/JPC with renewable surface. These movements assessed as part SHRP II R21 Composite Pavement project at University California Research Center ATIRC test track. Environmentally induced both internal joints was evaluated under several conditions; two thicknesses, doweled undoweled slabs, overlayed (two thicknesses)...

A computer program known as CalME has been developed for analysis and design of new flexible pavements rehabilitation existing pavements. The paper describes the overlay procedure calibration models reflection cracking permanent deformation through heavy vehicle simulator (HVS) tests. To simplify input process, includes databases traffic loading, climatic conditions, standard materials. companion was backcalculation layer moduli, results may be automatically imported into database....

The current research paper presents the implementation of a new design method for fully permeable pavements, developed using mechanistic-empirical approach by University California Pavement Research Center (UCPRC) through building two test sections which includes asphalt and concrete at State Long Beach (CSULB). Fully pavements are characterized as that in all layers permeable, pavement structure serves reservoir to store water minimize negative impacts stormwater. Pressure cells strain...

Prediction of subsoil deformation under traffic loading requires honoring the dynamic nature moving wheel loads and representing stress path caused by such loads. A practical method in framework layerwise summation procedure is proposed here for predicting settlement road overlaid on soft loading. The consists a simplified approach calculating load–induced an empirical model describing accumulation residual strain. Two amplification coefficients are introduced to account effect speed...

Full-depth reclamation (FDR) with or without various stabilizers has been successfully used as a rehabilitation strategy in California since 2001. Long-term field monitoring on several FDR projects that foamed asphalt portland cement the stabilizer combined comprehensive laboratory study resulted preparation of guidelines and specification language for this 2008. However, design criteria were essentially empirical, line procedures project level. Recently, interest grown use cement,...

Full-depth reclamation (FDR) with foamed asphalt has been successfully used as a rehabilitation strategy in California since 2001. Long-term field monitoring on several projects and comprehensive laboratory study resulted the preparation of guidelines specification language 2008. However, design criteria were essentially empirical, line procedures for this level project. Recently, there growing interest use cement, engineered emulsion, no-stabilizer full-depth strategies addition to...

Full-depth reclamation with or without various stabilizers has been successfully used as a rehabilitation strategy in California since 2001. Long-term field monitoring on number of full-depth projects that use foamed asphalt portland cement the stabilizer combined comprehensive laboratory study resulted preparation guidelines and specification language for this 2008. However, design criteria were essentially empirical line procedures level project. There growing interest no option...

In pavement engineering, good estimation of layer moduli from nondestructive methods is an important tool for scheduling and designing rehabilitation projects. The falling weight deflectometer test perhaps the most commonly used method evaluation structural performance systems. These measurements are then to back-calculate properties layered materials. A new based on constrained extended Kalman filter (EKF) proposed back-calculating moduli. uses a transformation constrain "searchable" domain...

An experimental study was conducted to determine the effect of haversine and sine displacement waveforms on four-point flexural beam fatigue test results for hot mix asphalt. Seven asphalt mixtures with different gradations, binder types, contents were tested this study. Four mixes in California three Australia. The at strain levels under both displacement-controlled mode without rest periods. comparison showed no differences between testing modes six seven mixtures. Fatigue life, shape...

A research study was conducted with the goal of determining expected performance life thin bonded concrete overlay asphalt (BCOA) in California. Eleven BCOA sections were built and tested Heavy Vehicle Simulators (HVS) Davis, The HVS testing provided insight into mechanics structures effects different rapid-strength materials, traffic, jointing, base factors on their performance, including both very wet dry conditions. Overall, excellent. eleven resisted predefined loading without cracking....