Title: Biaxial Testing of Repaired Concrete

Author(s): George Z. Voyiadjis and Taher M. Abuledeh

Publication: Materials Journal

Volume: 89

Issue: 6

Appears on pages(s): 564-573

Keywords: biaxial loads; biaxial tests; brittleness; concretes; patching; repairs; stresses; Materials Research

DOI: 10.14359/4030

Date: 11/1/1992

Abstract:
The repair of existing highways and bridges as they approach the end of their design life has become of paramount importance, especially with the decline of the economy. Little is known about the testing and selection of proper brittle repair materials, and the need for specifications for these materials has increased. The strength of the repaired system, especially in biaxial tension- compression stress states, plays a major role in these specifications. In this work, a special biaxial testing setup is designed and used, along with some simplified test techniques, to study the behavior of repaired concrete. Patched and nonpatched specimens are investigated under biaxial tension-compression states of stress. Different patch configurations, transition and rectangular, along with different patch depths, are considered. It is concluded that higher strength is achieved using specimens of transition patch shapes rather than rectangular ones. In both cases, the strength of the patched concrete specimens decreases as the patch depth increases.