Road Salt Meets its Match With a New Type of Concrete

More Durable Concrete That Doesn’t React to Salt

It has been a known fact for engineers that road salt, used as a de-icing agent every winter to protect the roads from the dangerous build-up of ice, are also responsible for the slow degradation of the concrete to which these roads are made of. Each winter where temperature fluctuations facilitate the build-up of ice due to the cycle of snowing, melting and freezing, roads are constantly being layered with calcium chloride salt.

Get Your First SmartRock Concrete Sensor for FREE

Giatec SR demo kit_
Giatec SR demo kit_

The issue lies in the fact that calcium chloride reacts with what is known as calcium hydrate – an ingredient found in concrete, and creates by product compound called calcium oxychloride. This chemical has the tendency to expand as it forms and so when this happens in the pore of concrete it can easily lead to degradation and cracking.

As a means of counteracting this reaction, Dr. Yaghoob Farnam of Drexel’s College of Engineering has been working on a new recipe for concrete that can hold its own against the chemical reaction. The goal is to find a concrete mix recipe that is just as strong and durable as those that typically pave the roads, but that also contains less calcium hydroxide. Farnam, who is also the director of the Advanced and Sustainable Infrastructure Materials research Group, recently created a method which uses leftovers from coal furnaces – fly ash, slag and silica fume – in a more durable concrete mix that doesn’t react to salt. His findings have recently been published in the journal of Cement and Concrete Composites.

Farnam’s study revealed that his concrete mix samples did not produce as much calcium chloride and that it did not show damage during the testing period compared to Portland cement samples which showed damage after just eight days. “This research proves that by using alternate cementitious materials to make concrete, they can avoid the destructive chemical reaction and continue to use calcium chloride,” Farnam states.

Source: http://drexel.edu/now/archive/2017/May/new-cement-recipe-stops-road-salt-degradation/

Leave a Reply

Your email address will not be published.

Related Articles

Top 11 Green Ready-Mix Concrete Producers in North America 

Sustainability and green movements have been quickly taking over industries, and construction is no different. Every year, 20 billion tons (10 billion cubic yards) of concrete are produced globally. This makes it the second most consumed product on earth, after water. Cement is not only the most expensive ingredient in a concrete mix, but its production is also responsible for 8% of global CO2 emissions. Get Your First SmartRock Concrete Sensor for FREE Free Demo Kit Ready-mix concrete, concrete that is batched for delivery from a…

New Giatec 360 Updates – Part 2: Graph Customization Tools

This article will continue on the topic discussed in Part 1, be sure to check it out! Get Your First SmartRock Concrete Sensor for FREE Free Demo Kit DisplayThe max and min temperature limits can be assigned to a sensor using the Parameter Thresholds function on both the app and the web platform of Giatec 360. When assigned, these limits are represented in the form of fine lines in red (max limit) and blue (min limit) color. Using the 360 dashboard, a user can choose if they…

New Giatec 360 Updates – Part 1: Temperature, Strength, and Maturity Charts

As part of Giatec’s continued efforts and goal to meet customer requirements and expectations, progressive changes are being made to the system to better comply with updating needs. Working with clients on a global scale, we strive to provide a streamlined platform that is one place for all. With the feedback collected from our valued customers several updates and transitions have been made to the Giatec 360 program, especially the ‘Charts’. To learn what the updated site has to offer and how beneficial this can be…

Missed This Year's Net Zero Construction Conference? We've Got You Covered!

Register for Full Access to All the Recorded Sessions Until April 30th

Claim Your Free Demo Kit

Get Your First SmartRock Concrete Sensor for FREE

Get Real-Time Data with SmartRock®

See how it works today

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.