scholarly journals Estimation of Thickness of Concrete Structures using the Impact Echo Method and Ultrasonic Pulse Velocity Method

2016 ◽  
Vol 18 (4) ◽  
pp. 179-184 ◽  
Author(s):  
Seonguk Hong ◽  
Yongtaeg Lee ◽  
Seunghun Kim ◽  
Changsik Lee
Keyword(s):  
Concrete Structures ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Impact Echo ◽  
The Impact ◽  
Impact Echo Method

Use of P-Wave Velocity to Estimate the Strength of Hardened Self-Consolidating Concrete

2011 ◽  
Vol 250-253 ◽  
pp. 1025-1030
Author(s):  
Yi Ching Lin ◽  
Yung Chiang Lin ◽  
Yu Feng Lin
Keyword(s):  
Wave Velocity ◽  
High Performance Concrete ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
P Wave ◽  
Self Consolidating Concrete ◽  
Impact Echo ◽  
P Wave Velocity ◽  
The Impact

This paper investigates the feasibility of using the P-wave velocity measured by the impact-echo technique to estimate the strength of hardened self-consolidating concrete. The relationship between the through-transmission ultrasonic pulse velocity (UPV) and the strength of high performance concrete was established previously by performing experimental studies on water-cured cylinders made of concrete having variations in water-cementitious amterial ratio and aggregate content. However, the through-transmission UPV measurement is not applicable to concrete elements with only one accessible surface. In this paper, two plate-like specimens were made of self-consolidating concrete and they had different curing conditions. One specimen was immersed in water and the other was covered with wet gunny sack for 7 days. The impact-echo technique, one-sided wave velocity measurement technique, is adopted to determine the P-wave velocity of the plate-like concrete specimens at an age of 28 days. The difference between the impact-echo P-wave velocity (IE-PV) and the through-transmission ultrasonic pulse velocity (UPV) is studied. In addition, the measured IE-PV is used to estimate the strength of the plate-like concrete specimen and the estimated strength is verified by taking cores from the specimen.

scholarly journals Performance Evaluation of Concrete using Marble Mining Waste

2016 ◽  
Vol 11 (2) ◽  
pp. 53-66 ◽  
Author(s):  
Sudarshan Dattatraya Kore ◽  
A. K. Vyas
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Mining Waste ◽  
Partial Replacement ◽  
Infrastructure Development ◽  
The Impact ◽  
Marble Waste

Abstract A huge amount waste (approximately 60%) is generated during mining and processing in marble industries. Such waste can be best utilized in infrastructure development works. Coarse aggregate 75% by weight was replaced by aggregate obtained from marble mining waste. The impact of marble waste as a partial replacement for conventional coarse aggregate on the properties of concrete mixes such as workability, compressive strength, permeability, abrasion, etc. was evaluated. The test results revealed that the compressive strength was comparable to that of control concrete. Other properties such as workability of concrete increased, water absorption reduced by 17%, and resistance to abrasion was marginally increased by 2% as compared to that of control concrete. Ultrasonic pulse velocity and FTIR results show improvement in quality of concrete with crushed marble waste. From the TGA analysis it was confirmed that, aggregate produced from marble waste shows better performance under elevated temperature than that of conventional aggregates.

scholarly journals Combined Use of Ultrasonic Pulse Velocity and Rebound Hammer for Structural Health Monitoring of Reinforced Concrete Structures

2019 ◽  
Author(s):  
Ahmed Lasisi ◽  
Obanishola Sadiq ◽  
Ibrahim Balogun
Keyword(s):  
Concrete Strength ◽  
Linear Regression Analysis ◽  
Concrete Structures ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Second Phase ◽  
Rebound Hammer ◽  
Combined Use ◽  
Non Destructive

This work investigates the use of Non-destructive tests as a tool for monitoring the structural performance of concrete structures. The investigation encompassed four phases; the first of which involved the use of destructive and non-destructive mechanisms to assess concrete strength on cube specimens. The second phase research focused on site assessment for a twin engineering theatre located at the Faculty of Engineering, University of Lagos using rebound hammer and ultrasonic pulse velocity tester. The third phase was the use of linear regression analysis model with MATLAB to establish a relationship between calibrated strength as well as ultrasonic pulse velocities with their corresponding compressive strength values on cubes and values obtained from existing structures. Results show that the root-mean squared-R2 values for rebound hammer ranged between 0.275 and 0.742 while ultrasonic pulse velocity R2 values were in the range of 0.649 and 0.952 for air curing and water curing systems respectively. It initially appeared that the Ultrasonic pulse velocity was more suitable for predicting concrete strength than rebound hammer but further investigations showed that the latter was adequate for early age concrete while the former was more suited for aging concrete. Hence, a combined use is recommended in this work.

Structural Damage Survey Using Nondestructive Tests Based on Stress Waves

2007 ◽  
Vol 348-349 ◽  
pp. 389-392
Author(s):  
Young Sang Cho ◽  
Seong Uk Hong
Keyword(s):  
Damage Detection ◽  
Structural Damage ◽  
Flaw Detection ◽  
Concrete Structures ◽  
Stress Waves ◽  
Stress Wave Propagation ◽  
Impact Echo ◽  
Nondestructive Tests ◽  
The Impact ◽  
Impact Echo Method

The impact echo method has been widely used to evaluate the integrity of concrete structures. This paper is to study damage detection technique of concrete members using impact echo method, one of the nondestructive tests based on stress waves. Stress wave propagation behavior is to be studied based on wave mechanics in concrete media. Based on the theoretical study, nondestructive tests using stress waves will be conducted to observe the wave behavior on structural damages. For the damage detection of concrete structures, a mock-up specimen was prepared, and various tests were conducted for the study of the behavior of stress waves. The concrete slab of the flaw detection consist of 5 types; the first group for the thickness presumption, the second group for the position of the voids, the third group for the position of the re-bars, the fourth group for the position conduit, and the fifth group for the position of the crack. Test results are evaluated and summarized to verify if the nondestructive tests can survey damages in the concrete structures in this paper.

Estimating Crack Depth of Concrete Structures Using Ultrasonic Pulse Velocity

2012 ◽  
Vol 496 ◽  
pp. 546-549
Author(s):  
Young S. Cho ◽  
Sang Woo Han ◽  
Hyun Suk Jang ◽  
Sang Ki Baek ◽  
Seong Uk Hong
Keyword(s):  
Human Life ◽  
Crack Depth ◽  
Concrete Structures ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Concrete Crack ◽  
Long Time ◽  
Close Range ◽  
Non Destructive

The concrete structures have the quite close linkage on the human life and it is used for a long time. Therefore, the importance for structure safety had been being continuously increased. The general method in order to measure concrete crack is the non destructive inspection. This method is known efficiently when it is difficult to check the crack through the eyes because of not exposed. Hence, the purpose of this study is measuring a crack depth of concrete by using the ultrasonic pulse velocity. And the Pundit that is one among the supersonic equipment was used in order to proceed with this research. In the first place used the existing methods (Tc-To, BS, T, close range bypass wave) in order to estimate crack depth of concrete. And then new method that the BS method and the T method are combined make an attempt to analyze the error.

Monitoring of concrete structures using the ultrasonic pulse velocity method

2015 ◽  
Vol 24 (11) ◽  
pp. 113001 ◽  
Author(s):  
G Karaiskos ◽  
A Deraemaeker ◽  
D G Aggelis ◽  
D Van Hemelrijck
Keyword(s):  
Concrete Structures ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity

scholarly journals Analysis of reinforced concrete structures through the ultrasonic pulse velocity: technological parameters involved

2017 ◽  
Vol 10 (2) ◽  
pp. 358-385 ◽  
Author(s):  
D.S. ADAMATTI ◽  
A. LORENZI ◽  
J. A. CHIES ◽  
L.C.P. SILVA FILHO
Keyword(s):  
Reinforced Concrete ◽  
Low Cost ◽  
Concrete Structures ◽  
Ultrasonic Pulse Velocity ◽  
Correct Choice ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Reinforced Concrete Structures ◽  
Technological Parameters ◽  
Surface Mapping

Abstract The application of Nondestructive Testing methods (NDT) may be an interesting strategy to monitor the condition state of reinforced concrete structures, especially when there are problems related to mixing, conveying or placing the concrete. Among the NDT methods, the Ultrasonic Pulse Velocity (UPV) has been one of the most used in various fields of civil engineering, due to the ease of operation, low cost, test velocity and low level of damage to the surface analyzed. This work aims to study the influence of certain technological variables in the results obtained through UPV tests. With this aim two large blocks were cast at the laboratory, with dimensions close to real concrete elements. One of the elements was reinforcement with steel meshes on both sides while the other was cast without reinforcement. Inside these elements objects were introduced to reproduce internal concrete flaws. To facilitate the analysis the results were represented by means of a surface mapping image technique and were also subjected to statistical analysis. Through the study it was demonstrated that the correct choice of test parameters is crucial to obtain a right interpretation of UPV results from real structures.

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