UCS or Point Load Testing for Design or Verification


UCS – The capacity of a material to withstand axially directed crushing forces. When the limit of comprehensive strength is reached, specimens fail, and are crushed. The UCS itself is the maximum force that a specimen can withstand before failure occurs.

Point Load Test – Used to determine the Point Load Strength Index (Is(50)). This index provides a method for establishing rock strength classification. The point load test apparatus and procedure enables economical testing of core or lump rock samples. In order to estimate uniaxial compressive strength, index-to-strength conversion factors are used.