Title: Repairs of Concrete Columns, Spandrels, and Balconies on a High-Rise Housing Complex in Chicago

Author(s): Stella L. Marusin

Publication: Symposium Paper

Volume: 85

Issue:

Appears on pages(s): 157-174

Keywords: acrylic resins; chlorides; columns (supports); con-crete slabs; corrosion; epoxy resins; high-rise buildings; rein- -- forced concrete; repairs.

DOI: 10.14359/6540

Date: 4/1/1985

Abstract:
A large complex of exposed-frame reinforced concrete high-rise apartments began to exhibit severe deterioration after 18 years of service. Tests on concrete extracted from the exposed columns, spandrels and balcony slabs confirmed that large amounts of chloride ions were present in the areas of deterioration. The concrete deterioration related to the corrosion of the embedded reinforcing steel of these structures. laboratory tests to materials and repair techniques, develop appropriate repair I) portland cement acrylic modified cast-in-place concrete and hand-placed epoxy mortar were selected as the restoration materials. used in the restoration are described. The repair techniques