Results 141 to 150 of about 2,868 (182)

Rock abrasivity test with a modified schmidt hammer

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1982
Ideally, an abrasivity test should be physically similar to the real cutting process of a drag bit or roller cutter and should generate a force of a few tonnes. The note describes how an m-type Schmidt hammer was modified and used as a portable in-situ tester.
W. Janach, A. Merminod
openaire   +1 more source

Evaluation of schmidt rebound hammer testing: A critical approach

Bulletin of the International Association of Engineering Geology, 1993
In the present paper, a critical approach to the evaluation of Schmidt hammer testing is attempted. Through a statistical analysis of field measurements on sandstone blocks from the archaeological site of Delphi (Greece), it was shown that there is an inconsistency in the correction method proposed by the manufacturer, in relation to the direction of ...
E. Kolaiti, Z. Papadopoulos
openaire   +1 more source

Hardness Testing of Polymer Concrete Castings by Schmidt Hammer

Materials Today: Proceedings, 2020
Abstract Presented paper is focused on testing the hardness of polymer concrete castings by Schmidt hammer. The first part of the paper describes the theoretical knowledge from the material area of the issue. The experimental part of the paper is devoted to the production process of the polymer concrete castings and to the materials, machines and ...
ZAJAC Jozef, Petruska Ondrej, Radchenko Svetlana, Duplakova Darina, Goldyniak David   +4 more
openaire   +1 more source

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
openaire   +1 more source

Evaluation of Laboratory Schmidt Hammer Tests on Carbonate Rocks

Proceedings, 2013
Being quick, inexpensive, non-destructive and handy, the Schmidt Hammer (SH) test has been widely used to determine hardness and to predict the unconfined compressive strength (UCS) of rocks. However, a review of empirical equations recommended for determination of the USC of rocks based on the SH rebound number (N) suggests that one unique formula ...
H. Arman, W. Hashem, O. Abdelghany, A. Aldahan   +3 more
openaire   +1 more source

Clast transport history influences Schmidt hammer rebound values

Earth Surface Processes and Landforms, 2020
AbstractThe Schmidt hammer (SH) is widely used in geomorphology for relative‐ and calibrated‐exposure age dating surfaces and deposits within landforms. This study employs a laboratory‐based methodology to assess the effects of surface roughness, clast roundness, and clast volume on SH rebound values (R‐values) by analyzing samples from three modern ...
Telemak Olsen, Josh Borella, Timothy Stahl   +2 more
openaire   +1 more source

Soft computing based closed form equations correlating L and N-type Schmidt hammer rebound numbers of rocks

Transportation Geotechnics, 2021
Mohammadreza Koopialipoor, , Navid Kardani   +2 more
exaly  

Effect of grain size or anisotropy on the correlation between uniaxial compressive strength and Schmidt hammer test for building stones

Construction and Building Materials, 2021
Yiguo Xue, Fanmeng Kong, Huimin Gong
exaly  

A method for normalization of Schmidt hammer rebound values

International Journal of Rock Mechanics and Mining Sciences, 2004
Aydin, A, Basu, A
openaire   +3 more sources

Schmidt-hammer exposure-age dating: a review of principles and practice

Earth-Science Reviews, 2022
Stefan Winkler, John A Matthews
exaly