Title:
Reinforced Concrete Antenna Pedestal
Author(s):
Benjamin P. Saldua, Ethan C. Dodge, Peter R. Kolf, and Carlton A. Olson
Publication:
Concrete International
Volume:
40
Issue:
4
Appears on pages(s):
40-42
Keywords:
defect, repair, roof, slab
DOI:
10.14359/51702288
Date:
4/1/2018
Abstract:
Nondestructive testing was used to evaluate concrete consolidation in an antenna pedestal recently constructed at the Canberra Deep Space Communications Complex in Australia. Evaluations were based on impulse-response tests, ultrasonic shear-wave tomography, core tests, and visual observations. The work showed that impulse-response testing allows rapid, reliable identification of significant defects. The consequent repair program is summarized.
Related References:
1. ASTM C1740, “Standard Practice for Evaluating the Condition of Concrete Plates Using the Impulse-Response Method,” ASTM International, West Conshohocken, PA.
2. Dodge, E.C., and Villalobos Chapa, S., “Impulse Response Data Analyzed for Repeatability and Numerical Magnitudes,” International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE 2015), Sep. 2015, Berlin, Germany, 11 pp.