Abstract
According to many reports published on the impact strength of rocks, the Page impact test is usually adopted, while the impact flexure test is seldom used.
The authors have designed a Charpy-type flexure testing machine with a small impact energy, 0.02kg·m, in order to make it possible to test such a brittle material as rock, and have carried out the tests with this machine on sandstone, marble and granite.
The results obtained show that this method affords a possible means of determining the impact strength of rocks.
