Title:
Influence of Silica Fume and Polymer Dispersions in High-Performance Concrete on the resistance to aggressive chemicals
Author(s):
U. Wiens, C. Alfes, and P. Schiessl
Publication:
Symposium Paper
Volume:
149
Issue:
Appears on pages(s):
103-122
Keywords:
chemical attack; concretes; ductility; mechanical properties; high-performance concretes; permeability; plastics, polymers and resins; polymerization; silica fume; strength; Materials Research
DOI:
10.14359/4072
Date:
10/1/1994
Abstract:
The chemical and petrochemical industries that process chemical and petrochemical products manufacture, store, and transfer a number of liquids that are hazardous to the environment and particularly to the groundwater. In Germany, uncoated concrete may be used only as a secondary barrier for handling water-hazardous materials. Development and optimization studies were carried out to reduce the permeability and increase the ductility of concrete for this application. Concretes with styrene-butadiene-based polymer dispersions and silica fume were produced to reduce the permeability, and concretes with limestone or expanded clay instead of Rhine gravel to improve ductility. The mechanical behavior of the concretes was characterized by determining the stress-strain curves under tensile and compressive loading and the stress crack-opening curves. Resistance to environmentally hazardous liquids was tested using a special penetration test standardized in Germany. Various organic liquids, each representing a main chemical group and of differing water solubilities and viscosities, were used as test media.