Significant progress has been made in research on environmental life-cycle assessment (LCA) of pavements. Use of this new knowledge has been slowed by a lack of standardized datasets and analysis protocols. Several software packages have been developed to address this by providing datasets with broader coverage and better quality, but practitioners need applicationspecific data input interfaces...

Pavement condition evaluation is a significant part of a good pavement management system for effective maintenance, rehabilitation, and reconstruction decision-making. One of the key components of pavement condition evaluation is the quantification of pavement distresses data. Cracking is the main form of early pavement distresses. Cracking of pavement affects road condition, driving comfort, t...

The new AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG) provides pavement analysis and performance predictions for various what-if scenarios. MEPDG performance predictions for anticipated climatic and traffic conditions will depend on the values of the input parameters that characterize pavement materials, layers, design features, and condition. A comprehensive global sensitivity ana...

Moisture damage to bituminous pavement occurs via several mechanisms, and appears in diverse forms such as blistering, stripping, and disaggregation. Blistering is a fulminating phenomenon in which the trapped moisture evaporates and upheaves the pavement surface layer within a few hours as a result of so-called blistering heat. In contrast, stripping and disaggregation are types of internal ch...

Compacted unbound granular materials are extensively used as sub-layer in pavement design. Most pavement design guides assume that they are responsible for the degradation and deformation of the roads and railways that they support. Biaxial tests are usually employed to investigate the elasto-plastic response of these materials to cyclic loading. A particularly interesting question is whether a...

Texas currently has approximately 17,000 miles of load-zoned roads, the majority of which are posted at 58,420 lbs. These roads consist predominantly of thin pavement structures constructed in the 1940s and 1950s, originally designed to carry the lighter loads of those times. In 1989, the 71st Texas Legislature passed House Bill 2060 (HB 2060), which established a $75-per-county permit that all...

1 Climate change has the potential to impact long-term road pavement performance. Consequently, to 2 maintain pavements within the same ranges of serviceability as before, current pavement maintenance 3 strategies need to be re-assessed and, if necessary, changed. Changes in maintenance may lead to 4 different agency costs and user costs as a consequence. This paper commences by defining an 5 a...

The bearing capacity and service life of a pavement are adversely affected by the presence of undrained water in the pavement layers. In cold winter climates, such as in Iowa, this problem is magnified further by the risk of frost damage when water is present. Therefore, wellperforming subsurface drainage systems form an important aspect of pavement design by the Iowa Department of Transportati...

SYNOPSIS This paper presents the results of a study of pavement design based on the plate bearing list. The report supplements previous papers on pavement design, particularly the study reported in 1952 on the use of the triaxial test for design of flexible pavements. A series of tests was conducted on a test section of the Joint Highway Research Project Test Road. These tests were conducted by...

Pavement design is the process of calculation thickness pavement layers which can withstand expected traffic load over life without deteriorating. In another word, it providing a structure in stresses on subgrade are reduced to acceptable magnitude. Highways Sudan deteriorate first years construction due many reasons including deficiency design. This research aims minimize probability roads fai...