Potholes—An Expensive and Recurring Problem for Cities

Red Car Stuck in Pothole

Potholes are a huge problem all over North America, but nowhere are the detrimental effects more evident than in Canada’s capital, Ottawa. According to CTV News, the city experienced over 40 freeze-thaw cycles during the 2018-2019 winter, which created tens of thousands of potholes that need to be fixed.

How Potholes Form: Explaining the Freeze-Thaw Cycle

During the freeze-thaw cycle, the water in concrete can expand by about 9%. As this happens pressure increases, and if pressure exceeds the tensile strength of concrete damage will occur. The thawing process that follows causes the pavement to contract and crack, furthering the damage. This repetitive cycle, combined with high volumes of traffic, can cause cracking, crumbling, and major potholes on road surfaces.

Click here to find out how recycled tires can help repair potholes!

Potholes: A Huge Expense for Municipal Governments

Potholes may not seem like a major threat to infrastructure, but they can run cities hundreds of thousands of dollars in repair costs every year. And as statistics show, these costs are increasing. According to Ottawa’s draft budget for 2020, Ottawa set aside $9.8 million dollars for pothole repairs, an increase of 7% from last year!
Even with this enormous amount of funding, there are still potholes that do not get repaired. It also doesn’t take into account claims made against the city for pothole-related damage to vehicles.

What Kind of Damage Can Potholes Do to Your Vehicle?

Large Pothole in Concrete Road
Repeated freeze-thaw cycles result in weakened pavement and, ultimately, potholes.

Ottawa drivers face increasingly deteriorated conditions of city streets each and every spring. In addition to being annoying and inconvenient, potholes formed by recurring freeze-thaw cycles can also cause serious damage to vehicles, including:

  • Flat tires
  • Dented or cracked wheels
  • Damaged steering, suspension, and/or wheel alignment

According to provincial government standards, the City of Ottawa is required to fix a pothole anywhere between 4 and 30 days after becoming aware of the problem. The amount of time it takes the city to repair the problem also depends on the size of the pothole and whether it is on a paved or an unpaved road.

There Must Be a Solution…Durability Testing with Electrical Resistivity

You’d think that a problem as predictable, costly, and destructive as potholes would have a solution. And although researchers all over the world are working hard to develop more durable, pothole-proof materials, we should not forget about improving concrete testing technologies and pavement preservation techniques to ensure long-lasting quality of our concrete roads. In addition, as cities grow so does the need for regular and reliable testing on busy highways and streets.

Surface concrete resistivity

Surf™ is a laboratory test device for rapid, easy and accurate measurement of the surface electrical resistivity of concrete based on the four-probe (Wenner-Array) technique. Surf tests according to AASHTO T358: Surface Resistivity Indication of Concrete’s Ability to Resist Chloride Ion Penetration, which allows you to evaluate the quality and permeability of concrete in seconds.

Giatec’s Surf device is the fastest and most accurate technology for the measurement of surface resistivity.

Surf can be used to evaluate;

  • Performance-based quality control of concrete
  • Estimation of chloride diffusion coefficient of concrete
  • Service life design of concrete structures
  • Estimation of the remaining life of concrete structures
  • Crack detection in concrete elements under load
  • Monitor the setting time of fresh concrete

The unique setup of this device enables the measurement of electrical resistivity with high accuracy while reducing the duration of the test, minimizing the ambient effects, and reducing human error. This technology has the potential to save significant costs associated with testing and labor for DOTs, testing agencies, and contractors.

Click here for more information about Surf.

Sources

CTV News
PCA
City of Ottawa

**Editor’s Note: This post was originally published on May 29th, 2018 and has been updated for accuracy and comprehensiveness.

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Articles

giatec award for best paper

Giatec Award for Best Paper

We are very excited to announce the launch of our annual research paper contest! This is a great opportunity for civil-engineers to expose their research and development to a global audience of industry experts. Plus, the…

Schematic representation of service-life stages for structures exposed to chloride-induced corrosion risk

Analyzing Corrosion in Reinforced Concrete Structures

Reinforced concrete structures have shaped our cities for thousands of years, from historical buildings stretching as far back as the Romans to present day, such as the 3-storey parking garage adjacent to the mega shopping mall…

Concrete Robot

Concrete-Eating Robots – The Future of Recycling Old Buildings

The process of demolishing a building involves heavy machinery to crush concrete and separate valuable materials that can be reused. Current methods consume quite a significant amount of time and money in order to safely disassemble the building, extract parts, and transport the materials to off-site centers…

rcon

Why Measure Concrete Resistivity?

Concrete is a porous material which contains microscopic voids known as pores. These pores range in size, vary in connectivity (pore structure) and can be added to the concrete via air-entraining admixtures. The water-to-cementitious material and…

completed road

Open Roads Sooner with Concrete Curing Sensors

Road construction can be a lengthy, disruptive process—so ensuring that your project stays on schedule is one of your most important responsibilities as a project manager. *For eligible new customers only Get a Free Trial Kit…

We use cookies to provide you with a better experience, analyze site traffic and assist in our marketing efforts. By continuing to use this website, you consent to the use of cookies in accordance with our Privacy Policy Page.