Results 31 to 40 of about 10,245 (254)

Prediction of cemented backfill strength by ultrasonic pulse velocity and BP neural network

open access: yes工程科学学报, 2016
Tailing-cemented backfill is a cement-based heterogeneous composite whose uniaxial compressive strength (UCS) and ultrasonic pulse velocity (UPV) are dependent on cement dosage, solid content, sample type, etc.
XU Miao-fei   +5 more
doaj   +1 more source

Ultrasonic Propagation in Liquid and Ice Water Drops. Effect of Porosity

open access: yesSensors, 2021
This work studies ultrasonic propagation in liquid and ice water drops. The effect of porosity on attenuation of ultrasonic waves in the drops is also explored.
Michiel Mendonck   +6 more
doaj   +1 more source

The study of ultrasonic pulse velocity on plain and reinforced damaged concrete

open access: yesMATEC Web of Conferences, 2018
An ultrasonic pulse velocity (UPV) test is often applied to determine the quality of concrete structures. It is well known that there are several factors which can influence the reading of ultrasonic velocity in concrete.
Kencanawati Ni Nyoman   +4 more
doaj   +1 more source

Application of ultrasonic pulse velocity technique and image analysis in monitoring of the sintering process [PDF]

open access: yesScience of Sintering, 2011
Concrete which undergoes a thermal treatment before and during its life-service can be applied in plants operating at high temperature and as thermal insulation. Sintering occurs within a concrete structure in such conditions. Progression of sintering
Terzić A., Pavlović Lj., Mitić V.
doaj   +1 more source

Evaluate Brick Units by Ultrasonic Waves

open access: yesTikrit 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

Investigation of Concrete Segregation by Ultrasonic Pulse Velocity

open access: yesJournal of Architectural Engineering Technology, 2017
Segregation is the separation of the components of fresh concrete or mortar, which can be caused by bad proportioning, insufficient mixing or excessive vibration. There are several tests which can be measured on hardened concrete or at the beginning of hardening. These are generally based on the percentage of the Fine aggregates between the top and the
Grini Abdelouaheb, Benouis Abdelhalim
openaire   +1 more source

Comparatively Study of Non-Destructive test with different methods in various curing days [PDF]

open access: yesE3S Web of Conferences
In 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

Statistical Equations to Estimate the In-situ Concrete Compressive Strength from Non-destructive Tests

open access: yesJournal 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]

open access: yesJournal 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]

open access: yesEngineering 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

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