|CRCP (continually reinforced concrete pavement)||DOT Cement, Low-P™ Cement, Rapid Set® Cement, Komponent®, Low-P™ FA1 Cement|
|DBR (dowel bar retrofit)||DOT Repair Mix|
|JPCP (jointed plain concrete pavement)||DOT Cement, Rapid Set® Cement|
|LCB (lean concrete base)||Rapid Set® Cement|
|Municipal Work (Bus pads, sidewalks)||DOT Cement, Komponent®, Rapid Set® Cement|
|Repair and rehabilitation||Asphalt Repair Mix, Asphalt Resurfacer, Cement All®, Concrete Mix, DOT Cement, DOT Concrete Mix, Rapid Set® Cement|
Volumetric Mixer produces 398 cubic yards of rapid strength concrete in just 5 hours, for panel replacement work on one of California's busiest freeways. Product used was Rapid Set Cement.
Asphalt has held the lion’s share of repair work for years. But now, pavements made of concrete prove to be more cost effective in the initial installment as well as more durable than asphalt, making them the ideal choice for repairing aging roadways. Product used is Rapid Set Cement.
Work included leveling the concrete pavement of the mall area and installing seven large-diameter concrete planters. The materials use would need to dry fast, speed up the work, and minimize disruption to the public. Mortar Mix was chosen and because it sets fast and can be applied in thick layers, the crew saw a 20% increase in productivity.
The window for the work to be performed was from 10:00 p.m. to 6:00 a.m. nightly. In that window, demolition, installation, and curing the concrete all had to be completed in time for the morning commute. Rapid Set Cement was the only choice to meet these strict traffic limitations and 3000 psi for opening strength was achieved.
Using a fast-setting Rapid Set Cement for a Latex Modified Concrete Overlay instead of Type III portland cement, allowed schedules to be met despite unexpected delays.
Work was able to be performed overnight and lanes reopened to traffic by morning. 12,000 spall repairs and dowel bar retrofits were completed using DOT Repair Mix.
The NCDOT oversaw the full-depth panel replacement on the southern stretch of Interstate-40 in Raleigh, North Carolina. Rapid Set cement concrete was used and met the specifications of 400-psi flexural strength in two hours, in half the time.
Using the Rapid Set cement, RA Knapp was able to get 2.3 times the production in the same 8-hour time frame. The two patching projects were finished on ahead of schedule.
UltraFlow 4000/8 was chosen to grout the panels on SR 18/Snoqualmie Parkway and nearby local intersections. The grout was pumped under the precast panels and achieved a minimum 500 psi to quickly open to traffic.
Unlike the chemically stabilized air bubble of traditional methods, Low-P MSA's air voids are made up of tiny, flexible hollow polymer spheres that act as microscopic forms in the cement matrix. They are rigid enough to form voids in the hardened concrete, yet soft enough to compress and allow space for expanding water to provide the desired freeze/thaw protection.
Rapid-hardening cement concrete can be used anywhere portland cement concrete can be used, and offers the greatest advantages when used for repair or rehabilitation of highway and airport pavements, bridge decks and overlays, and other projects where time is of the essence. Product used is Rapid Set Cement.
300 cubic yards of concrete were successful placed in 6 hours. The freeway opened to traffic an hour after placement. Short Load produced the Rapid Set Concrete.
Salt Lake City’s micro-trenching work occurred when Utah was still experiencing winter weather. Flowable Fill flowed well into the trench’s small space and set up quickly despite the cold weather, achieving the specified requirement of 500 psi in 28 days, with 1/2 maximum strength at opening, which was a few hours.
The sustainability of concrete, the most widely used material in the world, is still a difficult concept to quantify. However, the Product Category Rules (PCRs) for concrete are a step in the right direction. This article focuses on the sustainability of materials used in civil infrastructure such as highways and bridges, but the concepts explored are also frequently applicable to materials used for building repair.