JOURNAL OF ROCK MECHANICS

JOURNAL OF ROCK MECHANICS

In-situ evaluation of compressive strength of rocks and repair mortars using the "torsion" method

Document Type : Original Article

Authors
Mahmood Naderi
Ali Saberi Varzaneh
Abolfazl Rashvand Aveh
Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran.
Abstract
Today, measuring the strength of materials in situ and at the project site is of great importance. There are many methods for evaluating the compressive strength of stones and mortars, which are either destructive tests or their equipment is expensive and imported. In this research, a new test called "twisting" has been used, which has the ability to measure the compressive strength of various materials, including stones and mortars, with high accuracy and wide application. In this article, the "twisting" test has been performed on granite, travertine, marble, rhyolite, andesite, green crystalline tuff, lime, basalt, green stone tuff and a number of repair mortars. Then, the results of this test have been compared with standard methods. Also, equations and calibration diagrams have been presented to convert the results of the "twisting" test to the compressive strength of stones and mortars. Using the results of this research, it is possible to measure the compressive strength of the aforementioned materials with minimal damage and at the project site with high accuracy using a cheap and simple "twisting" device.
Keywords
Rock
Mortar
Strength
In situ test
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JOURNAL OF ROCK MECHANICS
Volume 6, Issue 1
Spring 2022
Pages 31-38