Analysis of Mitigating Concrete Cracks with Bacteria
Start Date: 10/1/21
End Date: 10/1/22
Researcher: Lisa Burris
Agency: The Ohio State University
Abstract: Throughout its life, concrete develops cracks in the surface. These cracks allow water into the voids. During the freeze thaw cycle of the winter, the water freezes and expands causing the size of the crack to expand. Larger cracks allow more water to enter the structure, which results either in larger cracks or additional cracking. This cycle continues until local failure occurs in the concrete, which can result in costly repairs. One potential way to address this issue is to introduce bacteria into the concrete mix. The concept is that when the bacteria is exposed to air, it precipitates a calcite into the concrete. This calcite fills the cracks and bonds to the concrete mitigating the negative impacts of concrete cracking.
The goal of this research is to assess the feasibility and impact of incorporating bacteria into concrete mixes used on the local roadway system for the purpose of extending service life. Due to the large gaps in understanding between the current state of the technology and upscaled usage of bacteria in concrete infrastructure, the results of this research will be incredibly impactful in terms of increasing this understanding and furthering the science of bacterial concrete. This research moves towards innovative approaches to improving the conditions of Ohio's local pavement and bridge structures. If this research indicates this method is successful and cost-effective, this could provide local public agencies with an opportunity to reduce maintenance and repair activities and their associated costs.