Rapid Set® Cement

When you’re working on a concrete repair project and time is critical, choose Rapid Set® Cement. Rapid Set Cement is a fast-setting hydraulic cement for concrete repair, restoration and new construction requiring the highest durability and fastest strength gain. The high-strength, low-shrinkage and superior durability properties of Rapid Set Cement give you exceptional concrete performance on diverse projects including highways, bridges, runways, sidewalks and floors.

Mix Rapid Set Cement with a wide variety of aggregates to produce customized 1-hour strength concrete or mortar mixtures. For larger projects, use conventional ready mix or volumetric mixer equipment to batch Rapid Set Cement mixtures. Contractors have used Rapid Set Cement to successfully repair projects since 1960.



The Datasheet explains the performance and technical characteristics of Rapid Set® Cement.  It also shows how to use Rapid Set Cement (i.e. surface preparation, mixing, placement and curing).

The Spanish version is also available.


The Safety Data Sheet (SDS) outlines information and procedures for handling and working with Rapid Set® Cement.  It includes physical and chemical property information, potential hazards, emergency procedures and CTS’s contact information.


The Specification gives a detailed statement explaining the type of jobs to specify Rapid Set® Cement for, the scope of work, thicknesses, performance requirements and usage.

Click here for word document

Standard Practices

Q: How fast does Rapid Set® gain strength?
A: Rapid Set Cement gains strength much faster than portland cement. In most cases, material made using Rapid Set Cement can be put into service in as little as one hour. Rapid Set Cement mixes will obtain strengths in one day, that an equivalent portland cement mix will take 1 month to achieve.

Q: What makes it fast?
A: It’s in the chemistry. When Rapid Set combines with water (hydrates), it forms crystalline compounds that are unique to Rapid Set. These compounds form faster than the compounds in portland cement.

Q: Is it durable?
A: Yes! Rapid Set Cement shrinks less and is more resistant to harsh chemical environments than portland cement. Shrinkage, attack from sulfates, and alkali reactions play a major role in concrete durability. Rapid Set Cement outperforms the competition in all three areas.

Q: How do I buy Rapid Set Cement? What size packaging?
A: Rapid Set Cement is available in a variety of forms: Blended and prepackaged into our line of quality, high-performance concrete repair materials know as Rapid Set products. Packaged as straight cement in 50-lb. bags, 88-lb. bags, and 2000-lb. bags. In bulk form delivered by tank truck or rail car.

Q: How do you mix it?
A: Rapid Set Cement is mixed using equipment and methods common to the concrete industry. Consideration should be made for the speed of Rapid Set. It is recommended that power- driven mechanical mixers be used to maximize the working time after mixing. Additives are available to allow for the extended mixing and transport times of high-volume applications.

Q: How do I increase the working time?
A: The working time of Rapid Set Cement is easily modified through the use of chemical additives or by lowering the mix temperature.

Q: Is it the same color as regular concrete?
A: Rapid Set® is similar in color to portland cement. The color of portland cement varies but Rapid Set® is generally lighter and more tan in color.

Q: Can I change the color?
A: Yes. The color of Rapid Set Cement can be easily changed using dry powder pigments designed for use in cement mixes. Due to the lighter color of Rapid Set, the resulting colors are often more vibrant.

Q: Is this a gypsum cement?
A: Rapid Set Cement is not a gypsum cement. Unlike gypsum, Rapid Set Cement can be used in wet environments.

Q: Is this a modified portland cement?
A: Rapid Set Cement is not a portland cement. It is made using similar materials and manufacturing processes but the end result is a cement of different chemistry that offers higher performance and increased durability. Rapid Set is not an accelerated cement. It comes out of the manufacturing process with built-in performance.

Q: Can I blend Rapid Set Cement with other cements?
A: Rapid Set Cement is a high-quality cement that is manufactured in a tightly controlled process. CTS is not in control of the manufacturing process for other cements and therefore doesn’t know the quality or contents of those cements. Blending Rapid Set with other cements is not recommended.

Jobs & Applications

  • OaklandBayBridge in Oakland, CA, Precision Concrete Materials (seismic repairs – used at the seismic joints on either side of the self-anchored suspension span)
  • I-80 in Reno, NV, Granite Construction Company (full-depth panel replace for boulder damaged pavement)
  • Interstate 5 near 405 in Tukwila, WA, Roger Langeliers Construction (emergency panel replacement because of 21 sinking panels due to a void below the panels)
  • Interstate 5 in Los Angeles, CA, Short Load Concrete (panel replacement)
  • Interstate 10 Santa Monica Freeway, Los Angeles, CA, C.C. Myers (emergency reconstruction of two bridges due to the Northridge earthquake)
  • Highway 1 in San Luis Obispo, CA, George L. Throop Co. (panel replacement)
  • Highway 99 in Bakersfield, CA, George L. Throop Co. & Granite Construction (pavement rehabilitation)
  • Interstate 10 in Pomona, CA, Western Rock Co. (replaced 9-inch thick pavement)
  • Highway 60/71 Interchange in Pomona, CA, Sapper Construction Co. (highway replacement)
  • Interstate 80 in Reno, NV, Granite Construction Company (full depth panel replacement for boulder damaged pavement)
  • John F. Kennedy Airport in New York City, NY, Tutor Perini Corporation & The Port Authority of New York and New Jersey (concrete pavement slabs repaired on a main runway)
  • Hartsfield-Jackson Atlanta International Airport in Atlanta, GA; Los Angeles International Airport in Los Angeles, CA; San Francisco International Airport in San Francisco, CA: Denver International Airport in Denver, CO, George L. Throop Co. (panel replacement)
  • Seattle-TacomaInternationalAirport in WA (replaced runway and taxiway slab sections)
  • ChicagoMidwayAirport in Chicago, IL, K-Five Construction Corporation (runway repaired at the bullseye section)
  • BobHopeAirport in Burbank, CA, George L. Throop Co. (poured hardstands and backfilled trench, filled the void between the column and the steel jacket in parking garage)
  • SydneyInternationalAirport in Sydney, Australia, Volumetric Concrete Australia
  • Military Airfields in the U.S., Army Corps. of Engineers (repaired spalls, cracks and craters, and other concrete repair in military applications)
  • Lincoln Tunnel in Weehawken, NJ, Crisdel Construction & Port Authority of New York and New Jersey (concrete approaches in front of tunnel)
  • Detroit/Windsor Tunnel in Detroit, MI, Kenaidan Contracting Ltd. (partial and full depth pavement repair)
  • Polished Concrete Countertops, Concrete Countertop Institute
  • Archiped Classics in Dallas, TX (architectural precast pieces)
Leed Product Evaluation

TechnicalSupportWhether you’re working on a time-sensitive project and need answers, or evaluating and choosing the right cement products, or looking to achieve specific results, we are here to help. Get answers to your questions from our technical support team. Find and download useful information from our website. Ask us to help get your construction team up to speed by requesting a jobsite demonstration or educational seminars.

ConcreteCalculatorLearn how Rapid Set’s strength, speed and sustainability help you get better results and finish your jobs sooner. These Charts will show you how.

ProductEvaluationLEED product evaluations summarize a product’s ability to contribute to a variety of LEED credits. These credits include Solar Reflectivity (SS7), Regional Materials (MR4), Recycled Content (MR5), VOC Content (EQ4) and Innovation in Design (ID1).

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