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Calcium Sulfoaluminate Cement: Meeting the Challenges of Pavement Repairs



Wheel ruts on concrete pavements pose persistent challenges, especially in regions with harsh conditions like heavy snowfall and studded tires. To address this issue, ACME Concrete Paving Inc., in partnership with the Washington State Department of Transportation (WSDOT), implemented Rapid Set® UHPC Mortar by CTS Cement Manufacturing Corp. during a critical rut repair project near Rosalia, WA. Similar projects have been implemented in California with a great deal of success.



The repair mortar, comprised of a blend of Calcium Sulfoaluminate (CSA) Cement, high-performance additives and high-density aggregate, has emerged as a superior option for addressing rut damage. 


What Makes CSA Cement-Based Products Unique?

 

CSA cement-based products boast rapid curing capabilities, exceptional compressive strength, low-shrink and a lower carbon footprint compared to traditional materials. Its quick-setting properties minimize traffic disruptions, while its sag-resistant formulation ensures resilience under extreme conditions. These features make it ideal for challenging repairs and heavy-duty applications.


Project Highlights include:

·    Strength That Lasts: Achieved 8,000 psi compressive strength within 4 hours and up to 17,000 psi at 28 days. 

·    Seamless Application: The innovative use of fluid, sag-resistant CSA cement allowed efficient filling of ruts on a sloped 150-foot bridge deck, followed by diamond grinding for smoother, safer driving conditions. 

·    Environmental Impact: CSA cement emits less carbon during production, making it a more sustainable choice for eco-conscious projects. 

·    Cost and Maintenance Benefits: Its durability and shrink-resistant properties lengthen repair lifespans, cutting down on maintenance frequency and costs. 

·    Shortened Lane Closures: The quick setting nature of CSA allows crews to open pavements to traffic after short work zone closures.

 

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