Title: RCC Lift-Joint Strength

Author(s): John R. Hess

Publication: Concrete International

Volume: 24

Issue: 1

Appears on pages(s): 50-56

Keywords:

DOI:

Date: 1/1/2002

Abstract:
Horizontal lift joints in roller-compacted concrete (RCC) structures are planes of weakness subject to leakage, deterioration, and possible failure from tensile or shear stresses. RCC dams may have five times as many lift joints. With more lift joints in RCC, the risk of lift surface deficiency is somewhat greater than it is in conventional concrete dams. These deficiencies may reduce lift-joint tensile (bond) and shear strength. Consequently, the design and construction conditions for RCC dam lift joints must be no less rigorous than with conventional concrete dams, especially when seismic loading is anticipated.