Sponsored

Rapid-Hardening DOT Cement Ideal for Cold-Weather Concreting

October 07, 2021
NJDOT Route 31 approach slab restoration.
NJDOT Route 31 approach slab restoration.

When the New Jersey Department of Transportation (NJDOT) needed to replace four bridge approach slabs on Route 31 in Hopewell, New Jersey, contractor J. Fletcher Creamer & Son had to perform the work in temperatures ranging from 18 to 49 degrees F. To deliver quality results in cold conditions, the Hackensack-based contractor used Rapid Set DOT Cement.

Rapid Set DOT Cement is an industrial-grade, fast-setting concrete that is typically ready for traffic and loading within one hour after placement. The material was chosen for this project because its specially formulated blend includes a plasticizer and an air-entrained additive. The plasticizer is a water reducer that improves workability and strength. Air entrainment provides long life in freeze-thaw regions. The high-performance blend eliminated the need to adjust the concrete mix with additional admixtures to meet NJDOT requirements.

Work took place Nov. 18-19, 2020. To help ensure concrete setting times were not delayed by cold temperatures—which could result in reduced concrete strength—the crew added hot water to mix the approximately 90 cubic yd of concrete in volumetric mixers. The crew stored aggregate and other materials indoors to protect them from the extreme cold. 

DOT Cement qualifies as very rapid hardening (Cement Type VRH) per ASTM C1600, Standard Specification for Hydraulic Cement. For this project, compressive strengths averaged 3,810 psi after three hours; 4,900 psi after six hours; and 5,220 psi after seven hours. The high early strengths allowed the concrete to be exposed to freezing temperatures that portland cement concrete typically cannot handle. 

Rapid Set DOT Cement concrete is ready for traffic in one hour after placement.
Rapid Set DOT Cement concrete is ready for traffic in one hour after placement.

Fast Facts:

Project: NJDOT Route 31 Approach Slab Restoration

Location: Hopewell, New Jersey

Project Type: Highway Pavement

Construction Start/End Dates: Nov. 18–19, 2020

Owner: New Jersey Department of Transportation

Contractor: J. Fletcher Creamer & Son

Project Size: 90 cubic yd

Product Quantity: 30 tons 

CTS Product Used: DOT Cement

-----------

Editor's Note: Scranton Gillette Communications and the SGC Infrastructure Group are not liable for the accuracy, efficacy and validity of the claims made in this piece. The views expressed in this content do not reflect the position of the Roads & Bridges' Editorial Team.

Related Articles

Sudden rain events plagued crews during the Vine & Washington intersection rehabilitation project, leaving workers scrambling to tarp freshly laid concrete against dense and driving rain.
Sudden rain events plagued crews during the Vine & Washington intersection rehabilitation project, leaving workers scrambling to tarp freshly laid concrete against dense and driving rain.
Alkali-silica reaction, commonly referred to simply as ASR, is considered to be, by those in the know, concrete cancer. According to the Portland…
February 03, 2021
Sponsored
When portions of two busy Kansas interstates, I-70 and I-635, were due for repair, the Kansas DOT (KDOT) needed a patching solution that would help…
October 14, 2020
In Foxboro, Massachusetts, crews completed a Low-P application over one weekend, avoiding disruption to weekday traffic.
In Foxboro, Massachusetts, crews completed a Low-P application over one weekend, avoiding disruption to weekday traffic.
Sponsored
Concrete is a primary construction material for hundreds of thousands of bridges and bridge decks throughout the U.S. As state DOTs look to preserve…
April 03, 2020
Shaped by Concrete Portland Cement Association
Image: Shaped by Concrete on Twitter (@By_Concrete)
The Portland Cement Association (PCA) today announced Shaped by Concrete, a new educational campaign to increase awareness of the sustainability,…
February 07, 2020
expand_less