Hit Your Maximum Placement Temperature. Without Adding Water to the Mix.
Mobile liquid nitrogen concrete cooling for mass pours, hot‑weather placements, and temperature‑critical specifications.
When a specification caps fresh concrete temperature and the ambient conditions will not cooperate, liquid nitrogen injection lowers the mix to target on site. Nitrogen cools by evaporation, not dilution, so you gain temperature control without touching your water‑to‑cement ratio or your mix design.
- Lance injection at the plant or the pour site
- No added water, no change to w/c ratio
- Built for mass concrete thermal control plans
- Supports ACI 305 hot‑weather placements
- Lower 48 delivery, we mobilise to you
- Mobile for one‑off pours, or installed
Temperature Control That Does Not Compromise the Mix
Every other way of cooling concrete makes a trade. Chilled water and ice both work by putting cold water into the batch, which means the amount of cooling you can buy is capped by the amount of water your mix design allows. Liquid nitrogen removes that ceiling.
No Water Added
Nitrogen boils off as a gas. Nothing stays behind in the batch, so your water‑to‑cement ratio, slump design, and strength targets are unaffected by how much cooling you ask for.
Cooling on Demand
Injection is metered and stopped when the mix reaches target. Cooling is dialed to the load in front of you rather than fixed hours earlier by a batching decision.
Mobile by Design
The equipment comes to the batch plant or the job site. No permanent chiller plant to build, no capital installation, and no waiting on a facility upgrade to make a pour date.
Deeper Temperature Drop
Liquid nitrogen enters the mix far colder than any chilled‑water or ice system can deliver, which puts aggressive placement‑temperature specs within reach instead of out of range.
Documented for Submittal
Temperature readings are taken and logged through the pour so the record supports your thermal control plan and satisfies the inspector reviewing it.
Field‑First Operators
Our crews come out of pipeline pressure testing and nitrogen commissioning work, where cryogenic handling and schedule pressure are routine rather than exceptional.
Four Steps From Specification to Verified Placement
Concrete cooling is a planning problem before it is an equipment problem. Most of the value is decided before a single truck is cooled.
Review the Spec
We start with your maximum placement temperature, mix design, pour volume, and placement window, plus whatever thermal control plan the project is working to.
Size the Cooling
Ambient conditions, material temperatures, and required temperature drop determine how much nitrogen the pour needs and how it should be staged across the schedule.
Inject and Monitor
Nitrogen is injected into the mixer and the temperature is checked as loads come through, with the rate adjusted so each truck leaves within spec.
Log and Hand Off
Readings are recorded through the placement and turned over as documentation supporting the temperature requirement.
“If your ambient temperature and your specification are in conflict, the pour date is not the problem. The cooling plan is.”
A Nitrogen Field Service Company, Not a Broker
Concrete Cooling Rentals is part of the NitroTech Rentals and HydroTech Testing family. Our crews come out of pipeline nitrogen, purging, and commissioning work, where cryogenic handling, exclusion zones, and documented results are routine rather than exceptional.
Cryogenic Handling Is Routine
Liquid nitrogen is not a material you learn on someone’s pour. Our operators work with it as a matter of course, and the job is planned around ventilation and exclusion zones before anyone opens a valve.
Schedule Pressure Is Normal
Commissioning and pressure testing run on windows that do not move. A pour date is the same problem we already solve, which is why we plan resupply and contingency into the scope.
Documentation Is the Deliverable
Undocumented results do not pass in commissioning work, and they do not satisfy a thermal control plan either. The temperature record is part of what you are buying.
Mobile for the One-Off, Installed for the Long Run
Liquid nitrogen is injected into the mix through a lance, at the batch plant or at the pour site. How that lance is set up depends entirely on how long you need it.
Mobile Injection, Manual Lance
A lance hookup with an elevated platform and truck bay, set up quickly and struck when the job is finished. Nothing stays attached to your plant. This is the option for short‑term projects, one‑off pours, and seasonal hot‑weather work.
Installed Injection, Automated Lance
An automated lance on a permanent foundation at the batch plant, inserting and metering as trucks come through. This is the option when temperature‑controlled concrete is a standing requirement rather than a one‑time problem.
Built for Temperature‑Critical Placements
Nitrogen cooling earns its place where a thermal failure is expensive to repair and impossible to hide: thick sections, tight specs, and hot weather.
Mass Foundations & Mat Slabs
- Thick‑section placements
- Peak temperature limits
- Thermal differential control
- Multi‑day continuous pours
Hot‑Weather Concreting
- Summer placement windows
- High ambient and material temps
- Slump and set‑time control
- Plastic shrinkage risk reduction
Infrastructure & Energy
- Bridge piers and abutments
- LNG and cryogenic tank bases
- Wind turbine foundations
- Water and wastewater structures
Industrial & Data Center
- Heavy equipment foundations
- Large‑format industrial slabs
- Schedule‑driven site work
- Specification‑bound placements
Nitrogen, Ice, and Chilled Water Side by Side
All three lower concrete temperature. They differ in how much cooling they can deliver, and in what they cost you elsewhere in the mix.
| Liquid Nitrogen | Ice Replacement | Chilled Water | |
|---|---|---|---|
| Adds water to the mix | No, boils off as gas | Yes, melts into the batch | Yes, it is the mix water |
| Cooling ceiling | Not limited by mix water | Capped by water allowance | Capped by water allowance |
| Effect on w/c ratio | None | Must be batched for | Must be batched for |
| Adjustable per load | Yes, metered live | Limited, set at batching | Limited, set at batching |
| Permanent installation | None, mobile equipment | Ice plant or delivered ice | Chiller plant at the batch plant |
| Handling requirement | Trained cryogenic operators | Routine plant labor | Routine plant operation |
| Best fit | Deep drops, tight specs, mass pours | Moderate drops, plant‑side | Modest drops, ongoing production |
See the Full Method Comparison →
Nitrogen is not always the answer. If a modest temperature reduction gets you inside spec and your plant is already set up for chilled water, that is the cheaper path, and we will tell you so.
What We Do, and What We Do Not
Where We Are the Right Call
- Placement temperature specs that ice and chilled water cannot reach
- Mass concrete with peak temperature and differential limits
- Hot‑weather pours on a schedule that will not move
- Projects that need cooling without touching an approved mix design
- Sites with no chiller infrastructure and no time to build it
What We Are Not
- A ready‑mix supplier or a batch plant
- A concrete testing or inspection laboratory
- A designer of your mix or your thermal control plan
- A commodity gas supplier competing on catalog price
- The cheapest option when a simpler method already works
We Work to the Documents Your Project Is Held To
Concrete cooling requirements are written into the specification long before anyone calls a nitrogen contractor. These are the references that usually drive the conversation.
ACI 305: Hot Weather Concreting
Governs placement practice when ambient conditions threaten the concrete. Projects frequently carry a maximum fresh concrete temperature drawn from this guidance, and that number is usually the reason cooling is needed at all.
ACI 207: Mass Concrete
Addresses heat of hydration in thick sections, including peak internal temperature and the differential between core and surface. Lowering the temperature of the concrete as placed is one of the primary controls available.
Project Thermal Control Plans
Many owners require a written plan covering how placement temperature, peak temperature, and cooling will be managed and documented. We supply the cooling scope and the temperature record that supports it.
Your Specification Governs
Where a project specification, DOT standard, or owner requirement is stricter than general industry guidance, the project document is the one we work to. Send it over and we will size to it.
Concrete Cooling, Explained Properly
Written for the engineer or superintendent who has to make the temperature number work.
Mass Concrete Cooling →
Peak temperature and thermal differential limits, why heat of hydration builds on placement temperature, and where cooling fits among the other controls.
Hot Weather Concreting →
ACI 305 placement temperature limits, what hot concrete actually costs you, and the options ranked cheapest first.
Compare Cooling Methods →
Nitrogen, ice, chilled water, and aggregate cooling side by side, including how to choose and when you do not need us.
Liquid Nitrogen Injection →
How lance injection works, mobile versus installed configurations, and why the equipment is leased rather than bought.
Data Center Construction →
Mat foundations, generator pads, and a speed-to-power schedule that rules out waiting for cooler weather.
LNG, Energy & Industrial →
Tank foundations, turnaround work, and heavy equipment bases where the outage clock governs everything.
Bridges & Heavy Civil →
The most explicit temperature language you will encounter, and the least flexibility about the pour date.
Service Areas →
Ten state markets where placement temperature is hardest, and what changes from one to the next.
For Ready-Mix Plants →
Quote the temperature-critical work instead of turning it down, without touching your approved designs.
Safety on the Pour →
Oxygen displacement, cryogenic contact, exclusion zones, and how a pour is actually planned around them.
Concrete Cooling FAQ →
Thirty-three direct answers on temperature limits, safety, scheduling, documentation, and cost.
Send Us the Spec and the Pour Date
Tell us the maximum placement temperature, the volume, the location, and when you are pouring. We will tell you what the cooling takes, and whether nitrogen is the right way to get there.
Henry Froats Jr., Director · info@hydrotechtesting.com