Results 41 to 50 of about 1,077 (167)

Assessment of a Non-Destructive Testing Method Using Ultrasonic Pulse Velocity to Determine the Compressive Strength of Rubberized Bricks Produced with Lime Kiln Dust Waste

Geotechnics, 2023
This paper presents a comprehensive study in which non-destructive testing utilizing ultrasonic pulse velocity (UPV), considering both pressure (P) waves and shear (S) waves, was used to assess the compressive strength (CS) of rubberized bricks.
Joy Ayankop Oke, Hossam Abuel-Naga
doaj   +1 more source

From Green Extraction to Gut Bioaccessibility: Synergistic Potential of Ginkgo biloba, Astragalus membranaceus, and Salvia miltiorrhiza Phytochemicals for Functional Food Applications

Food Science &Nutrition, Volume 14, Issue 7, July 2026.
This study optimized green extraction of a synergistic tri‐herbal blend of Ginkgo biloba, Astragalus membranaceus, and Salvia miltiorrhiza. The 1:1:2 blend showed the highest TPC synergy, with probe ultrasound giving maximal phenolic recovery. The extract, rich in rosmarinic acid, chlorogenic acid, and catechin, exhibited antioxidant, antimicrobial ...
Mohamed Ibrahim Younis, Yahia Ibrahim Sallam, Khaled Fahmy Mahmoud, Rawaa H. Tlay, M. Ali Aboudzadeh, Tarek Gamal Abedelmaksoud   +5 more
wiley   +1 more source

Impact of Na and K Activators on Properties of Class F and C Fly Ash‐Based Geopolymers

Journal of the American Ceramic Society, Volume 109, Issue 7, July 2026.
This study evaluates the comparative impacts of sodium (Na) and potassium (K) activators on the mechanical properties and microstructural development of Class F and Class C fly ash‐based geopolymers. ABSTRACT This study investigates the mechanical and microstructural evolution of geopolymers synthesized from Class F and Class C fly ash using two ...
Mehrzad Mohabbi
wiley   +1 more source

Multiple Scattering Suppression in Heterogeneous Media: High‐Precision Imaging of Sleeve Grouting Defects Based on Elastic Reverse Time Migration

Engineering Reports, Volume 8, Issue 6, June 2026.
This study proposes an elastic wave reverse time migration (RTM) method to suppress multiple scattering noise in heterogeneous concrete. By effectively utilizing scattered wavefields, RTM enables high‐precision, robust imaging of sleeve grouting defects in prefabricated buildings, significantly outperforming traditional algorithms.
Yong Lu, Li Tian, Sheng Yuan, Jing Zhang
wiley   +1 more source

A new approach to estimate compressive strength of concrete by the UPV method

Revista IBRACON de Estruturas e Materiais
Although the ultrasonic pulse velocity (UPV) method has been extensively used to estimate concrete compressive strength, the relationship between UPV and concrete strength is mixture dependent.
M. A. P. Irrigaray, R. C. de A. Pinto, I. J. Padaratz   +2 more
doaj   +1 more source

Characterization of pervious concrete focusing on non-destructive testing

Revista IBRACON de Estruturas e Materiais, 2020
This study aims to investigate the properties of pervious concrete focusing on characterization tests by the Ultrasound Method. For this, three mixtures were produced with the paste/aggregate (P/Ag) ratio ranging from 0.45 to 0.65, water to cement ratio (
S. T. MARTINS FILHO, E. M. BOSQUESI, J. R. FABRO, R. PIERALISI   +3 more
doaj   +2 more sources

Vertical crack imaging in a nuclear structure using Ultrasonic Pulse Velocity and Ultrasonic Tomography Techniques

e-Journal of Nondestructive Testing
Ensuring the integrity of concrete structures used for the containment of short-lived low- and intermediate-level radioactive waste is critical for long-term safety.
Sokratis Iliopoulos, Bart Roggeman, Laura Diaz Caselles   +2 more
doaj   +1 more source

دراسة بعض خواص الخرسانة الرغویة باعتماد سرعة الموجات فوق الصوتیة

Iraqi Journal of Civil Engineering, 2007
Concrete is by far the most widely used construction material now today. Foamed concrete is light building material with good strength as well as low thermal conductivity and easy workability; it is produced by either Mix Foam Method or Preformed Foam ...
Amir Abdul-Rahman Hilal Al-Dulaimi
doaj   +1 more source

Domain Wall Rebounds Driven by Competing Entropic and Spin‐Transfer Torques in Cylindrical Nanowires

Advanced Functional Materials, Volume 36, Issue 41, 21 May 2026.
Domain‐wall motion in cylindrical magnetic nanowires driven by nanosecond current pulses. Low current densities efficiently displace domain walls, whereas higher currents cause rebound at the wire ends. The effect results from the interplay between spin‐transfer torque and thermally induced processes, highlighting the role of thermal gradients in ...
Elias Saugar, Jorge Marqués‐Marchán, Sara Catalano, Agustina Asenjo, Michael Foerster, Miguel Angel Niño, Manuel Vazquez, Fèlix Casanova, Arantxa Fraile Rodríguez, Rafael P. Del Real, Oksana Chubykalo‐Fesenko, Cristina Bran   +11 more
wiley   +1 more source

External Vibrations on Early‐Age Concrete: A Review

Engineering Reports, Volume 8, Issue 5, May 2026.
Scientific illustration of external vibration, their influencing properties and effects, possible outcomes and measures adapted. ABSTRACT Early‐age concrete exhibits limited mechanical strength, making it highly susceptible to external disturbances such as vibrations from construction activities, traffic, or nearby machinery which can disrupt internal ...
Parvathy Kizhakkiniyedath Mohanan, Sylvia Keßler   +1 more
wiley   +1 more source