Many agencies use the AASHTO Guide for Design of Pavement Structures to design their pavement systems. The limitation inherent in this method is the empirical nature of the decision process, which was derived from a road test conducted almost 45 years ago in Ottawa, Illinois. The newly released Mechanistic-Empirical Pavement Design Guide (MEPDG), based on NCHRP Study 1-37A, has adopted a mechan...

A geotechnical evaluation of some soils in Numan, Adamawa, North –East, Nigeria has been carried out. This was done to determine the suitability of the soils for use as subgrade/filling, sub-base and base course materials for road construction. The samples were collected from five different areas, at surface and sub-surface levels. The areas are New Demsa, Farei, Dowaya, Numan Town and Imbru. T...

In several countries, brick and ceramic tile are the most important construction materials; therefore, associated waste generation is common in demolitions. An alternative use for to incorporate it into road construction. However, biggest limitation as structural pavement layers that strength durability regulatory requirements not met highways when used. As an alternative, demolition (CDW) soil...

Many in-service bridges with steel–concrete composite beams are currently aging and experiencing performance deterioration. Under long-term cyclic loads from traffic on bridges, headed shear studs in vulnerable to fatigue damage. The comprehensive understanding of behaviors the feasible detection damage is, thus, crucial for accurate numerical simulation crack propagation process. paper, experi...

Expansive soil swells when it is wet, and will shrink dries. Due to this behavior of the soil, strength other properties are inferior. To improve its properties, necessary stabilize with different stabilizers. Soil stabilization a process treat maintain, alter, or expansive performance. In study, potential 'Fino' as stabilizing additive was investigated for improving engineering be used subgrad...

Abstract Deficiencies of the four spectral formats i.e., 2%/50-yr, 5%/50-yr, 10%/50-yr and AASHTO (American Association State Highway Officials) 2009 demand modification for bridge design application in Canada. Among them spectrum is dropped from current investigation as its difference with Canadian Bridge Design Code (CHBDC) 2006 too large to modify. This study introduces an approach calibrati...

This study investigates the possibility of replacing minimum web reinforcement in deep beams with discrete fibers. Additionally, equivalent dosage fibers required to obtain similar performance beam is investigated. Deep made plain concrete no fibers, as per AASHTO LFRD recommendations (0.3% both horizontal and vertical), a 0.5% volume fraction steel, macro-synthetic hybrid are tested at shear s...

The objective of this paper is to propose and illustrate feasibility, approach, validation as per prevailing codes design standards, specification rehabilitate bridge pier cap by using Ultra-High Performance Concrete (UHPC). evaluation existing caps bearings indicates that the complete removal bearing undesirable due 1) massive size 2) difficulty in cutting through thick components 3) deeply an...