Title:
Influence of Aggregate Properties on Fracture Energy of High-Strength Concrete
Author(s):
S. Nakamura, Y. Kitsutaka, and K. Kamimura
Publication:
Symposium Paper
Volume:
149
Issue:
Appears on pages(s):
701-710
Keywords:
aggregates; cracking (fracturing); energy; fracture properties; high-strength concretes; mix proportioning; mortars (material); Structural Research
DOI:
10.14359/4180
Date:
10/1/1994
Abstract:
The interaction between aggregates and mortar matrix is an important factor for improving the strength and toughness of high-strength concrete. Experimental investigations were carried out on the influence of aggregate properties on fracture energy G F of high-strength concrete. The influence of mortar matrix strength and volume fraction of coarse aggregate on fracture energy has been tested by three-point bending in Mode I loading. The interaction between aggregates and mortar matrix was estimated by the energy balance concept on the fracture energy of aggregate inclusion G Fi and that of mortar matrix G Fm. According to the test results, G F is strongly influenced by strength properties and volume fraction of aggregates. It was clear that the improvement of toughness of high-strength concrete is obtained by using high-strength aggregate and by designing a large volume fraction of coarse aggregate.