Inspiration
State and local transportation agencies maintain hundreds of thousands of bridges while working with limited inspection and repair budgets. The American Society of Civil Engineers gave U.S. bridges a C grade and estimates $191 billion in bridge rehabilitation needs. Some damage develops inside concrete, where visual inspections may not reveal it. We were inspired to help agencies find those problems earlier and direct crews to the bridges and locations that need attention most.
What it does
CivilSeal is a proposed bridge maintenance and repair system designed to find internal cracks that may be suitable for targeted treatment. It would use inspection records, bridge drawings, traffic loads, and environmental conditions to identify higher-risk bridges and predict where damage may occur. Robotic inspections using methods such as ultrasound or ground-penetrating radar would then examine those areas and help engineers assess each crackâs location and severity. For cracks suitable for treatment, the system proposes injecting biological healing agents into the concrete, then reinspecting the area to assess the result.
How we built it
During Origin Weekend, we developed the concept and mapped the workflow from bridge selection through inspection, repair, and verification. We researched nondestructive inspection methods and a published approach for delivering bacteria through drilled channels to promote calcium carbonate formation inside concrete cracks. We combined those ideas into a proposed system for transportation agencies. CivilSeal has not yet been built or tested on a bridge.
Challenges we ran into
The main challenge was connecting promising technologies to a realistic maintenance process. An agency needs to know which bridge to inspect, where to inspect it, what a detected defect means, and whether a repair actually worked. We also had to distinguish between methods already used for inspection and the biological repair method, which would require further testing before use on real bridges.
Accomplishments that we're proud of
We developed a focused concept for reinforced-concrete bridges and mapped a complete proposed workflow. We defined how the system would rank bridges, locate internal damage, assess whether cracks were suitable for biological treatment, and verify the result through follow-up inspection.
What we learned
Finding damage is only one part of the problem. Inspection results become more useful when they help an agency decide where to send a crew and what to do next. We also learned that any proposed crack treatment needs a way to measure whether it reached the damaged area and improved its condition.
What's next for CivilSeal
Next, we want to speak with bridge inspectors and transportation agencies to understand their current workflows and choose a narrow first application. We would then test the risk-ranking and inspection workflow using available bridge data. The biological repair concept would need separate laboratory validation, including tests of crack access, treatment delivery, durability, and inspection after treatment.
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