Passivation and Chloride-Induced Depassivation of Additively Manufactured Duplex Stainless Steel Clads in Simulated Concrete Pore Solution | Journal of Materials in Civil Engineering

Abstract The metallurgical and electrochemical behavior of additively manufactured super duplex stainless steel (SDSS) clads on carbon steel [low-carbon steel (LCS)] substrates are investigated in a simulated concrete pore solution. The SDSS clads were manufactured using laser powder bed fusion (LPBF). Passivation and chloride-induced depassivation of the clads were studied as a function of LPBF…

Seismic Strengthening of the Mohaka Township Concrete Bridge with FRP Fabric and FRP Spike Anchors: Case Study in New Zealand | Journal of Composites for Construction

Abstract The Mohaka Township, New Zealand, reinforced concrete bridge was designed in 1958, measuring 239 m long and divided into 14 spans, each 17.1 m long. The piers are doubly reinforced concrete walls over a pile cap with 12 piles. Four prestressed T-beams and a singly reinforced deck form the superstructure. All individual structural members…

Effect of Soft Viscoelastic Biopolymer on the Undrained Shear Behavior of Loose Sands | Journal of Geotechnical and Geoenvironmental Engineering

Introduction Grout injection is used to improve loose contractive sands that are prone to liquefaction. Injected chemical grouts bind soil grains, increase the undrained shear strength, and thus reduce the liquefaction potential of soils (Gallagher and Mitchell 2002; Xanthakos 1994; Karol 2003). Typical materials include cement, gypsum, sodium silicate, acrylates, acrylamides, and polyurethanes. Various efforts…

Seismic Response of Reinforced Retaining Walls with Saturated Calcareous Sand Backfill Subjected to Acid Rain Erosion | Journal of Materials in Civil Engineering

Abstract The seismic performance of honeycomb concrete canvas geocell-reinforced retaining walls with saturated calcareous sand backfill was investigated. Four different shaking table test models were constructed to determine the effect of reinforcement, saturation, and acid rain erosion. Before the shaking table tests, cyclic simple shear tests were conducted to investigate the effect of acid rain…

Graphene-doped concrete cuts construction emissions

Known as ‘Concretene’, it was developed by researchers at the University of Manchester in partnership with construction firm Nationwide Engineering. Although five per cent more expensive than traditional concrete, the material is said to significantly reduce the amount of material and steel reinforcement required during construction, which translates to a 10-20 per cent saving for…

Seismic Interaction of Adjacent Structures on Liquefiable Soils: Insight from Centrifuge and Numerical Modeling | Journal of Geotechnical and Geoenvironmental Engineering

Abstract In urban environments, structures are often built in close proximity to each other. Seismic coupling and structure-soil-structure interaction (SSSI) are known to affect system accelerations, settlement, and tilt with consequential impact on structural damage. Yet, the extent and nature of these interactions are poorly understood, particularly on ground susceptible to liquefaction. In this paper,…