Jacob Hiller - Academia.edu (original) (raw)

Papers by Jacob Hiller

Functional Pavement Design, 2016

© 2016 Taylor & Francis Group, London. Climate zones are regions with homogeneous climatic co... more © 2016 Taylor & Francis Group, London. Climate zones are regions with homogeneous climatic conditions. In mechanistic- empirical pavement design, climate is an important factor affecting pavement performance, so distress predictions are expected to be consistent across an identified geographic area. This study aims to develop climate zones specifically for flexible pavement design for the State of Michigan. In detail, annual mean air temperature, mean air temperature in hot months, and mean air temperature in cold months were used to identify climate zones. The critical threshold to determine a climate zone in this study was to keep the temperature within the zone less than 2.8°F (1.6°C), a change which results in a relative distress difference of about 10%. Nine climate zones were developed for Michigan taking into account both the air temperatures and pavement distresses. The developed climate zones are expected to be helpful for future flexible pavement designs in Michigan

Victor Cervantes along with Mr. Dong Wang for his assistance in the preliminary

Journal of Transportation Engineering, Part B: Pavements, 2020

AbstractFive individual climate variables are required as climatic inputs in a pavement design us... more AbstractFive individual climate variables are required as climatic inputs in a pavement design using Pavement ME Design (PMED, a pavement design tool). While it is believed that all five climatic v...

Journal of Materials in Civil Engineering, 2019

AbstractTemperature of in-service pavements can be regulated by varying the thermophysical proper... more AbstractTemperature of in-service pavements can be regulated by varying the thermophysical properties of the pavements. Although empirical correlation between the thermophysical properties and pave...

Transportmetrica A: Transport Science, 2018

Frontiers of Structural and Civil Engineering, 2017

International Journal of Pavement Engineering, 2015

ABSTRACT The purposes of this study were to establish the difference between empirical and mechan... more ABSTRACT The purposes of this study were to establish the difference between empirical and mechanistic-empirical approaches in the flexible pavement design and to quantify the effects of mean annual precipitation and temperature on the flexible pavement distresses using the Mechanistic-Empirical Pavement Design Guide (MEPDG) software. Seventy-six specific locations from 13 states throughout the USA were selected based on different climate conditions using virtual climate stations based on the interpolation from the nearest weather stations prior to meeting the objectives. Subsequently, analysis was conducted based on the predicted distresses, including longitudinal cracking, transverse cracking, alligator cracking, asphalt concrete rutting and total pavement permanent deformation. Generally, the pavement structure and materials have been set as constant to control the effects of material on the results. On the basis of the MEPDG analysis, the longitudinal cracking of flexible pavement is significantly affected by both factors (temperature and precipitation), particularly in wet climatic regions. The mean annual temperature has a great influence on the alligator cracking, transverse cracking and permanent deformation of flexible pavement. However, neither factors demonstrated a significant impact on the predicted International Roughness Index of flexible pavement surfaces.

Transportation Research Record: Journal of the Transportation Research Board, 2001

An approach is described that is used to identify to what degree Michigan’s concrete pavements ar... more An approach is described that is used to identify to what degree Michigan’s concrete pavements are affected by materials-related distress (MRD) and to determine what distress mechanisms are at work. The approach taken includes a network-level visual assessment and detailed visual inspections, field sampling, and laboratory analyses on 14 selected projects to determine the distress mechanisms. It is concluded that although the majority of Michigan’s concrete pavements are unaffected by MRD, a significant percentage of the concrete pavement network have distress manifestations consistent with the occurrence of MRD. These manifestations included staining in the vicinity of joints and cracks, D-cracking, joint-crack deterioration, progressive map cracking with exudate, scaling, and corrosion of embedded steel. Each pavement section was visually assessed and then tested using a falling weight deflectometer. Field air permeability measurements were also made, and core samples were removed...

Transportation Research Record: Journal of the Transportation Research Board, 2012

Warping can be quantified by the equivalent temperature difference required to deform a theoretic... more Warping can be quantified by the equivalent temperature difference required to deform a theoretically flat slab to the same shape as the actual slab. In the Mechanistic–Empirical Pavement Design Guide (MEPDG), the current warping model for jointed concrete pavements uses a triangular shrinkage distribution within the shrinkage zone near the surface of the slab as well as modification factors to account for ambient relative humidity (RH) and the amount of total shrinkage that is expected to be reversible. The current warping model was evaluated and found to predict improbable values. A new warping model based on an assumed nonlinear shrinkage distribution that followed the curve described by one-quarter of an ellipse was proposed. The elliptical shrinkage distribution was found to agree well with predicted moisture distributions through the depth of the slab at various locations around the United States. A new factor accounted for the fact that only drying shrinkage contributed to wa...

Transportation Research Record: Journal of the Transportation Research Board, 1999

Processed cellulose fibers provide a desirable balance between mechanical, physical, and durabili... more Processed cellulose fibers provide a desirable balance between mechanical, physical, and durability characteristics when placed in a cement matrix. The effect of processed cellulose fibers (natural) on the mechanical properties and dimensional stability properties of portland cement concrete and its subsequent use in the paving industry are studied. The mechanical and durability properties of three concrete mixtures [the standard Department of Transportation (DOT) mixtures for pavement construction and full-depth patch repair] with and without processed cellulose fibers were studied. The test results are very promising. There is a 10 percent improvement in compressive strength and a 40 percent improvement in impact strength of cellulose fiber concrete when compared with plain cement concrete mixtures. The average cellulose fiber concrete’s flexural strength after 24 hours was 3 MPa and the average 28-day flexural strength was 5 MPa. The inclusion of fibers shows a marginal improveme...

Road Materials and Pavement Design, 2010

Dowel Bar Retrofitting (DBR) is a pavement rehabilitation technique commonly adopted to increase ... more Dowel Bar Retrofitting (DBR) is a pavement rehabilitation technique commonly adopted to increase the service life of pavements in the United States. This method involves either preventative or corrective maintenance of structural cracks or joints in jointed concrete pavement structures. The performance of DBR installations is typically measured using the Load Transfer Efficiency (LTE) parameter based on deflections. In this

Construction and Building Materials, 2011

Cold Regions Science and Technology, 2011

This study investigates whether the diurnal temperature cycle affects the geothermal regime on th... more This study investigates whether the diurnal temperature cycle affects the geothermal regime on the Qinghai-Tibet Plateau. To separately characterize this effect, the impact of climatic warming on the ground's thermal regime is eliminated by setting the global warming rate to 0°C/year. The diurnal temperature cycle at the natural ground surface is denoted as sinusoidal functions with amplitudes of 0, 5,

Transportation Research Record: Journal of the Transportation Research Board, 2002

With the further adoption of mechanistic-empirical design methods in the pavement industry, the c... more With the further adoption of mechanistic-empirical design methods in the pavement industry, the calculation of critical responses and cumulative damage for a variety of parameters will be imperative. Traditionally, the critical tensile stress developed by loads at the midslab edge has been used as a mechanistic parameter to determine the required thickness in jointed concrete pavements. However, the inclusion of both temperature and shrinkage gradients in concrete pavement analysis can drastically alter the critical stress location and subsequent distress type that predicts pavement performance. Longitudinal and corner cracking have been found in California to be distresses as significant as transverse cracking. Most of the longitudinal and corner cracking can be explained by excessive differential drying shrinkage. Using finite-element analysis, this study compared the critical tensile stress near the transverse joint with the critical tensile stress at the midslab edge (relative r...