Title:
Strength Evaluation of Shotcrete-Repaired Beams
Author(s):
Mohamed A. H. Abeel-Halim and H. Schorn
Publication:
Structural Journal
Volume:
86
Issue:
3
Appears on pages(s):
272-276
Keywords:
beams (supports); cracking (fracturing); deflection; tests; performance; reinforced concrete; repairs; shotcrete; strength; Structural Research
DOI:
10.14359/2904
Date:
5/1/1989
Abstract:
Twelve reinforced concrete beams were tested to failure. Two of the beams were unrepaired original beams, five beams were repaired by removing the bottom layer to a depth equal to 35 mm, and the last five were repaired by removing the cover concrete to 20 mm. Normal shotcrete and polymer-portland cement-shotcrete were used in repairing the beams. The repaired beams were compared to the original beams with respect to cracking, deflection, ultimate strength, and mode of failure. Testing has shown that the shotcrete layers and parent concrete remained bonded and acted together throughout loading until failure. The reduction in the strength of the repaired beams was 8 percent when the concrete cover (20 mm) was replaced and 12.5 percent when the 35-mm layer was replaced.