Title: High-Strength Concrete Research for Buildings and Bridges
Author(s): Henry G. Russell and Anthony E. Fiorato
Publication: Symposium Paper
Appears on pages(s): 375-392
Keywords: bridges (structures); buildings; high-strength concretes; mechanical properties; prestressed concrete; reinforced concrete; research; structural design; General
In the United States, the primary use of high-strength concretes has been in columns of high-rise buildings. However, in recent years high-strength concrete has been used in applications where durability is important. This has resulted in research into material and structural properties other than compressive strength. This paper summarizes selected research projects in the United States. In materials research, projects have been conducted to identify the relationship between water-cementitious ratio and compressive strength, the development of compressive strength with time, and the effects of heat of hydration on in-place material properties. Research has also been conducted to assess the testing procedures to be used with high-strength concrete. Specific projects include work on the use of smaller test specimens and different capping materials. In structural research, projects have been conducted to identify how the structural performance of high-strength concrete members differs from that of conventional strength concrete members. Specific research projects have involved investigations of modulus of elasticity, creep, shrinkage, development length, shear strength, and column strength. Although research is underway on a number of topics, additional work is still needed to answer questions about the applicability of code provisions for high-strength concrete. A list of specific topics is included in the paper.