Title:
High-Performance Concrete: Superior Microstructure for Long-Term Durability
Author(s):
Della M. Roy
Publication:
Symposium Paper
Volume:
159
Issue:
Appears on pages(s):
393-408
Keywords:
diffusion; durability; high-performance concretes; microstructure; mineral admixtures; n i x proportioning; performance; permeability; porosity; wastes
DOI:
10.14359/16767
Date:
2/1/1996
Abstract:
This paper discusses recent research on high performance concrete with a focus on cemenentitious materials designed for durability. A major key to suchp erformance originates with the concrete microstructure. Recent advances in optimizing cement and concrete materials by using calculated packing diagrams offer the promise of superior products achieved by increased packing efficiency. A high packing density coupled with adequate processing and cement binder characteristics makes possible the formation of a fine microstructure. In turn, this fine microstructure results in a low permeability and therefore provides a resistance to aggressive forces from the environment, which together enhance its long term durability. The favorable interaction among physical and chemical phenomena gives rise to better long term performance, whether the application is structural, or chemical, such as in waste management.