Results 21 to 30 of about 10,179 (211)
Evaluate Brick Units by Ultrasonic Waves
Tikrit Journal of Engineering Sciences, 2005 Wide laboratory search was done to evaluate brick units in single, and test the prisms built from brick unit by use ultrasonic waves in non-destructive test. The results show that the pulse velocity increases with increasing compressive strength and time
Zain Al-Abdin Raouf +2 more
doaj +3 more sources
Comparatively Study of Non-Destructive test with different methods in various curing days [PDF]
E3S Web of ConferencesIn non-destructive testing, materials, components, or assemblies are inspected, tested, or evaluated without being destroyed. In nondestructive testing, materials, components, and assemblies are evaluated for quality and integrity without damaging them ...
Pahade Chandramohan +6 more
doaj +1 more source
Journal of Engineering, 2018 The aim of this study is to propose reliable equations to estimate the in-situ concrete compressive strength from the non-destructive test. Three equations were proposed: the first equation considers the number of rebound hummer only, the second equation
Ahmed Faleh Al-Bayati
doaj +1 more source
Estimation of Mechanical and Durability Properties of Self-Compacting Concrete with Fibers Using Ultrasonic Pulse Velocity [PDF]
Journal of Rehabilitation in Civil Engineering, 2018 This study addressed the efficiency of ultrasonic pulse velocity (UPV) as a nondestructive test in concrete in estimating the mechanical (compressive and tensile strength) and durability (water absorption) properties of fiber-reinforced self-compacting ...
Masoud Fallahtabar Shiade +1 more
doaj +1 more source
Density and Ultrasonic Pulse Velocity Investigation of Self-Compacting Carbon Fiber- Reinforced Concrete [PDF]
Engineering and Technology Journal, 2018 comprehensive research has been carried out to understand the effect of adding carbon fibers to density and ultrasonic pulse velocity of self-compacting concrete.
G.A. Salman
doaj +1 more source
Applied Sciences, 2021 This work aims to study the relationship between the compression resistance and velocity from ultrasonic pulses in samples of mortars with 25% of pozzolanic content.
Leticia Presa +2 more
doaj +1 more source
Alexandria Engineering Journal, 2012 This study aims to investigate the relationships between Schmidt hardness rebound number (RN) and ultrasonic pulse velocity (UPV) versus compressive strength (fc) of stones and bricks.
Ali Abd Elhakam Aliabdo +1 more
doaj +1 more source
Frost influence on the ultrasonic pulse velocity in concrete at early phases of hydration process
Case Studies in Construction Materials, 2021 Quite often concrete strength parameters have to be determined at an early age. Due to the strong correlation existing between the mechanical and acoustic properties of concrete, ultrasonic devices can be used for this purpose.
Uldis Lencis +2 more
doaj +1 more source
Ultrasonic pulse velocity and physical properties of hybrid composites: A statistical approach
Hybrid Advances, 2023 This work describes the correlations between the ultrasonic pulse velocity (UPV) and physical properties of fibrous-particulate hybrid composites made of glass/carbon fabrics and three different micro-inclusions such as silica particles, recycled carbon ...
Sergio Luiz Moni Ribeiro Filho +6 more
doaj +1 more source
FEBS Letters, EarlyView.An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley +1 more source