Performance Study on Bituminous Concrete Mixes Using Varying Content and Sizes of Shredded Polyethylene Terephthalate | Journal of Materials in Civil Engineering

Abstract Due to massive development, population explosion, and urbanization, an enormous amount of plastic waste is generated, mainly consisting of bottles made of polyethylene terephthalate (PET). The disposal of these PET bottles is a challenge to society. This paper studied bituminous concrete (BC) mix modified with PET bottles in shredded form with variable size and…

Relationships between Asphalt-Layer Moduli under Vehicular Loading and FWD Loading | Journal of Materials in Civil Engineering

Abstract The modulus of the asphalt layer in a pavement structure subjected to vehicular loading is different from that subjected to falling weight deflectometer (FWD) loading. A comprehensive approach is developed in this study to investigate the relationships between asphalt layer moduli under the two loading conditions. Two full-scale asphalt pavements named flexible pavement and…

Geoenvironmental Evaluation of RCA-Stabilized Dredged Marine Sediments as Embankment Material | Journal of Materials in Civil Engineering

Abstract Millions of cubic meters of marine sediment are dredged from Chesapeake Bay waters in Maryland each year. Due to their low-strength characteristics, the sediments often need to be amended with other geomaterials for potential use in earthworks projects. However, the environmental effects of the blend need to be thoroughly investigated prior to such use….

Chemical and Performance Characteristics of Rejuvenated Bituminous Materials with High Reclaimed Asphalt Content | Journal of Materials in Civil Engineering

Abstract The present paper aimed at studying the effectiveness of waste vegetable oil (WVO) as rejuvenator in restoring the desired properties of recycled asphalt mixes. The effectiveness of rejuvenators was first evaluated based on aging resistance, rutting, and fatigue performance of rejuvenated bitumen blends of recovered reclaimed asphalt pavement (RAP) bitumen and virgin bitumen. Bitumen…

Depth-Dependent Seabed Properties: Geoacoustic Assessment | Journal of Geotechnical and Geoenvironmental Engineering

Depth-Dependent Density and Effective Stress Self-compaction reflects the dependency between effective stress σz′ and sediment density ρs . In this section, an asymptotically correct compaction model is used and the evolution of effective stress σz′ , porosity n , and sediment density ρs is investigated for a wide range of sediments in the upper 1,000 m…

Axial Stress–Strain Model for FRCM Confinement of Masonry Columns | Journal of Composites for Construction

Abstract Masonry columns often exhibit a lack of load-carrying capacity that is due to overloads and do not provide any ductility or dissipation capacity under seismic forces. Column confinement has been extensively studied as an effective technique, which could mitigate these structural vulnerabilities. The confinement of masonry columns will be studied in this paper, by…

Confining Stress Path-Based Compressive Strength Model of Axially Loaded FRP-Confined Columns | Journal of Composites for Construction

Abstract The accuracy of existing compressive strength models for fiber–reinforced polymer (FRP)-confined concrete might vary significantly since most of them were established empirically, without a clear understanding of the confinement mechanisms. Previous studies have suggested that the compressive behavior of confined concrete depends on its confining stress path. However, the confining stress path of FRP-confined…

Poisson’s Ratio Characteristic Curve of Unsaturated Soils | Journal of Geotechnical and Geoenvironmental Engineering

Abstract Poisson’s ratio is an elastic property needed as input in a wide range of geotechnical engineering applications. Despite experimental evidence, there is currently no model in the literature to explicitly account for the effect of saturation on the Poisson’s ratio. This paper presents the concept of Poisson’s ratio characteristic curve (PRCC), which establishes a…

Women in 3D Printing to Hold First Ever TIPE 3D Printing Conference > ENGINEERING.com

Women in 3D Printing to Hold First Ever TIPE 3D Printing ConferenceSana Kazilbash posted on October 21, 2020 | The event will highlight the growing diversity of the 3D printing industry. (GIF courtesy of TIPE 3D Printing.) Dr. Sara Safari is a college professor and an electrical engineer. An avid mountain climber, she’s the first…

3D-Printed Pharmaceuticals Pave the Way for Customizable Drug Therapies > ENGINEERING.com

(Stock photo.) Since its inception during the later decades of the last century, 3D printing (also known as additive manufacturing) has moved far beyond merely fabricating simple plastic parts. Today the technique can be used to produce much-needed medical supplies such as personal protective equipment for health care workers fighting COVID-19. Among other advances, 3D…