Optimal application of high-strength concrete in cantilever structural walls

The availability of very high-strength concretes in the market place has been a major factor in the development of very tall concrete buildings worldwide. Although concrete strengths of up to 120 MPa is commercially available in Australia and overseas, the costs of production associated with higher strengths and the lack of awareness of the advantages of using this versatile material effectively have discouraged many designers from specifying it for tall building applications. This paper presents the cost benefits associated with optimal use of high-strength concrete in construction of walls in tall buildings. It is shown that the increased lettable space due to thinner walls, makes high strength concrete application extremely cost effective for tall buildings.