Cement Silo Condition Assessment Dixon, IL
Dixon, IL
Project Overview
OmniVueNDT was contracted to conduct a structural assessment of a cement silo in Dixon, IL, after plant engineers and owners raised concerns about visible cracking on the structure’s façade. The objective was to perform a non-destructive subsurface evaluation to assess the reinforcement integrity and potential structural deficiencies.
A Ground Penetrating Radar (GPR) survey was performed from a boom lift, allowing for detailed scanning of the silo’s exterior while minimizing disruption to plant operations.
Picture 1 - Investigated Silo
Scanning Methodology
A series of 2d line scans were conducted both horizontally and vertically along the silo’s surface to map reinforcement placement and concrete conditions.
Horizontal Data Sampling - The GPR antenna was moved laterally at various heights to collect data in parallel sections (See Picture 2).
Picture 2 - Horizontal data sampling
Radar Image Analysis - The scan results provided precise reinforcement mapping, including:
Hoop steel (horizontal reinforcement)
Vertical rebar locations
Estimated reinforcement depth
Picture 3 - Radar image showing the horizontal (hoop steel) and vertical rebar location, estimated depth.
Key Findings & Structural Implications
Upon data analysis, the GPR results (See Picture 4) revealed discrepancies between the as-built reinforcement layout and the original construction drawings.
Hoop steel reinforcement was embedded deeper than the vertical reinforcement in the areas where cracking and separation were observed.
This unexpected reinforcement variation likeely contributed to localized stress concentrations, potentially explaining the structural concerns.
Picture 4
Project Outcome & Engineering Benefits
By utilizing non-destructive evaluation (NDE) and non-destructive testing (NDT) techniques, OmniVueNDT provided critical insights for engineering analysis and structural remediation planning:
Accurate reinforcement mapping to guide repair strategies.
Identification of potential weak points contributing to cracking and structural separation.
Minimized investigation costs by eliminating the need for invasive testing.
These findings allowed the plant engineering team to develop targeted reinforcement solutions, ensuring the silo’s structural integrity and long-term durability.
