Results 241 to 250 of about 29,027 (272)

Evaluation of Schmidt Hammer Rebound Hardness Test Holders

Geotechnical Testing Journal, 1984
Abstract An evaluation is made of three different holders for Schmidt hammer tests on rock core in the laboratory, including steel angle, V-notch, and semicircular groove holders. The differences are small, but it is shown that the V-notch holder gives consistently higher rebound hardness values.
KL Gunsallus, FH Kulhawy, TD O'Rourke
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Rebound hammer test to predict in-situ strength of concrete using recycled concrete aggregates, brick chips and stone chips

, 2020
This paper aims to investigate the performance of normal strength concrete with the use of rebound hammer, with particular emphasis on the influence of coarse aggregate. Existing codes provide guidelines for concrete using stone chips (SC).
Anindya Saha, K. M. Amanat
semanticscholar   +1 more source

Testing of concrete by rebound method: Leeb versus Schmidt hammers

Materials and Structures, 2018
Hardness is considered as an important property of concrete; it can be used to estimate compressive strength of concrete in situ. The classic Schmidt rebound hammer is the most popular nondestructive method to measure concrete surface hardness, while the Leeb rebound hammer has been extensively studied in geological and metallographic fields over ...
Konstantin Kovler, Fengzhe Wang, Boris Muravin   +2 more
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Advancing the Rebound Hammer Method: A New Concrete Test Hammer

2011
The concrete test hammer patented by Proceq’s Ernst O. Schmidt at the beginning of the 1950’s is without a doubt the most widely used NDT instrument worldwide for rapid assessment of the condition of a concrete structure. Despite this fact, the validity of the method remains a hotly debated topic amongst experts in the NDT field. This is largely due to
openaire   +1 more source

Evaluation of rubbercrete based on ultrasonic pulse velocity and rebound hammer tests

Construction and Building Materials, 2011
Abstract Several research works have been carried out to study the fresh and hardened properties of concrete containing crumb rubber (rubbercrete) as a replacement of fine aggregate. The outcomes of these studies have highlighted the advantages and disadvantages of rubbercrete compared with conventional concrete mixtures.
Bashar S. Mohammed, Najwa Juaini Azmi, M. Abdullahi   +2 more
openaire   +1 more source

An Experimental Study on the Rebound Degree Tendency of Linear Hitting Test Hammer

Journal of the Korea Concrete Institute, 2005
Recently, as the remodeling market gradually substitute for new construction market and safety diagnosis for reconstruction apartment become a matter of principal Interest, it is demanded that scientific diagnosis and evaluation for existing concrete structure state.
Hyo-Soo Ahn, Chee-Ho Seo
openaire   +1 more source

Compressive Strength Correlation of t he Designed and As-Built Columns in Structures Using Non-Destructive Test Method- the Schmidt Rebound Hammer (Case Study: Kubwa, FCT-Abuja, Nigeria)

UNIABUJA Journal of Engineering and Technology
Evaluating the compressive strength of concrete in new and existing buildings is important for assessing their structural integrity, for the early identification of structural issues, and for improving maintenance and safety measures.
S. M. Auta, Oluwatobiloba I. Olanipekun
semanticscholar   +1 more source

Strength Evaluation of In-Situ Concrete by Rebound Hammer and Core Testing

Cement, Concrete, and Aggregates, 1994
Abstract This paper describes the results of an extensive field investigation where the quality of in-place concrete flatwork was evaluated. Nondestructive testing (NDT) was carried out using ultrasonic pulse velocity and rebound hammer techniques to establish a correlation with compressive strengths of core tests.
MA Ward, BW Langan
openaire   +1 more source

Rebound Hammer, Pulse Velocity, and Core Tests in Self-Consolidating Concrete

ACI Materials Journal, 2012
ACI Materials Journal, V. 109, No. 2, March-April 2012. MS No. M-2010-411.R1 received June 29, 2011, and reviewed under Institute publication policies. Copyright © 2012, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors.
openaire   +1 more source

Test Method for Determination of Rock Hardness by Rebound Hammer Method

2008
  +6 more sources