Cold Weather Concrete Placement in Texarkana, Texas
Winter concrete placement in Bowie and Cass counties: warm mix, blankets, heaters, cylinder curing and honest pour-day calls when the forecast turns.
Minus five degrees Fahrenheit is the record low Wikipedia lists for Atlanta in Cass County, and Nash in Bowie County is listed with a record low of minus six in 1989. Those are rare extremes, and a cold snap that hard is not what usually ruins winter pours. The more common problem is a night that dips just below freezing after a warm afternoon, with a pour finished at four o'clock and nothing covering it.
We place concrete in cold weather for slab on grade, footings, walls, paving and equipment pads across Bowie and Cass counties. Winter here is mild compared with the northern states, but it is wet, and wet and cold together causes slow setting, frozen surfaces and soft finishes. Concrete that freezes before it reaches a minimum strength is permanently damaged, and a surface that freezes during finishing sheds in thin flakes the next spring.
Our rule is simple: plan the cure before the pour, and leave the schedule open for the weather. The concrete takes as long as it takes.
Reading the forecast
We check the forecast for the pour day and for the three or four days that follow. Cold weather rules apply when the air temperature is expected to fall below a specified value for more than a short period, and the project specification defines it. A day that starts at 38 degrees and reaches 55 is usually workable with precautions. A day that never gets above 40, with a freeze overnight, may mean moving the pour.
The calendar matters too. Pours that would normally go on a Friday afternoon move to Monday morning so a weekend freeze does not catch fresh concrete unattended. Because average annual precipitation is around 51 inches in Nash and 50 in Atlanta, according to Wikipedia's climate summaries, wet and cold often arrive together. Rain on a plastic slab chills it and washes the surface. We keep a standby list of pours that can slide a day or two, and we tell the general contractor early, rather than at the last minute, when a pour should wait. That conversation is easier when the schedule includes weather days. General contractors and construction managers generally prefer it that way.
Warm mix, warm ground, warm cover
The key is keeping heat in the concrete long enough for it to gain strength. We start with the subgrade. A frozen base pulls heat out of the slab, and concrete should never be placed on frozen ground. If the subgrade is cold, we thaw it with blankets or heaters and keep it from freezing again before the pour.
The mix can be adjusted. The supplier can warm the water, use a higher cement content or add an accelerating admixture to speed setting. We avoid calcium chloride in reinforced concrete because of corrosion risk. After placing and finishing, we cover the slab with insulated curing blankets, plastic or both, and in colder spells we add heaters or enclosures. A cold pour inside a warehouse shell is easier than one in the open, because walls and a roof hold heat, but a building that is not yet enclosed gets temporary walls or tarps first. Heaters must vent outside, since unvented combustion heaters produce carbon dioxide that can ruin the slab surface. We check the concrete temperature at placement and record it, along with ambient temperature and curing temperatures.
What is different on a cold pour
Finishing is the first change. Cold concrete sets slowly, so the bleed water stays on the surface longer, and finishers must wait. Troweling too early traps water and weakens the surface. The pour often finishes later in the day than a warm-weather pour, and lights may be needed.
Forms and reinforcing change too. Ice or snow must be removed from forms and bars before concrete goes in, and we do not use water to melt it. Strip times extend, because concrete strength grows more slowly in cold. For concrete formwork on walls, we leave forms in place longer and often add insulated form liners. Elevated slabs, pads and machine foundations need extra care because their schedule is tied to equipment arrival. For all of it, curing protection continues until the concrete has the strength the engineer requires.
What winter protection costs
Blankets, heaters, enclosures, fuel, warm mix and extra labor all add cost. The amount depends on how cold it gets and how long protection is needed. Owners often find that the cost of protection is far less than the cost of replacing a frozen slab. Delays add cost too, so a general contractor's schedule should include a few weather days.
Texas winters rarely require the heavy enclosures seen in northern states, so most protection is blankets and temperature monitoring. That keeps cost modest. We price protection as a separate line so you can see the allowance, and we adjust it if the weather turns out milder. Winter pours on public projects, such as the Texarkana downtown work on the Perot Theatre modernization, listed for completion in November 2026, can leave little room to shift, and we plan protection into the base bid.
Testing and acceptance in cold weather
Cylinders cast in winter must be cured like the structure. Field-cured cylinders sit next to the slab under the same blankets, so their strength reflects what the slab has. Lab-cured cylinders may show higher strength than the slab actually has, and the engineer may want both. We coordinate with the testing agency and keep cylinders warm and protected until pickup.
Maturity methods, which track temperature over time to estimate strength, are used on some projects. Embedded sensors give an estimate of in-place strength, which helps decide when to strip forms or remove blankets. Concrete testing and quality control is therefore a larger piece of a winter pour than a summer one. We keep logs of the temperatures and the protection used, and give them to the owner at closeout.
Ask us about a winter pour
Give us the pour list and the specification. We will price protection, tell you which pours can move and plan the cure before the forecast gets worse.
Common Questions
At what temperature should you stop pouring?
The specification usually defines it, often around 40 degrees and falling. We can pour below that with protection, but we may recommend waiting if the day will not warm up. The rule is to keep the concrete above a minimum temperature until it reaches a set strength.
Does frozen concrete recover?
If it freezes very early, before reaching about 500 psi, it may suffer lasting damage. Later freezing is less harmful. Testing, such as cores or rebound hammer checks, can show what remains.
Can you use accelerators in cold weather?
Yes, non-chloride accelerators are common. They speed setting and strength gain. Calcium chloride is not used in reinforced concrete. The mix is chosen with the supplier.
How long must concrete be protected?
Until it reaches the specified strength, which can be several days. The time depends on mix, temperature and the engineer's requirement. We keep blankets on until tests or maturity data confirm it.
Do heaters affect the slab surface?
Unvented heaters can create carbon dioxide that leaves a soft, chalky surface. We vent heaters outdoors and use indirect heat in enclosures.