FRACTURE ENERGY OF LIME SAND CONCRETE AND APPLICATION OF THE ACOUSTIC-EMISSION TECHNIQUE

The linear localization technique known as the acoustic emission techn ique was applied to the investigation of crack initiation and propagat ion in lime-sand concrete. The results showed that all parts of the te sted lime and concrete specimens were damaged to some extent during th e fracture process. The fracture energy and specific fracture energy w ere measured by use of the Instron 1346 materials testing machine. On the basis of the experimental results, the influence of autoclaving sc hedules, calcium-silicate ratio and water-solid ratio on fracture ener gy and specific fracture energy of this concrete was researched.