Hot Weather Concreting

Internal concrete temperatures must be tracked during hot weather placements, because hot weather can severely compromise overall concrete strength, performance, and durability. By embedding COMMAND Center sensors within large concrete elements, construction teams can monitor the in-place concrete’s curing temperatures to ensure the concrete stays within safe temperature thresholds.

Hot weather conditions increase concrete’s internal temperature, causing the concrete to gain strength quickly during curing. This accelerated process can actually be harmful—concrete that has cured in this environment generally exhibits low 28-day strength. The concrete may also experience drying shrinkage, which can lead to increased cracking. When concrete temperatures reach 165°F, the risk of delayed-ettringite formation (DEF) increases. DEF is a material-related distress causing cracking that can lead to costly repairs or reconstruction.

In an attempt to curb the negative effects hot weather can have on concrete, many specifications require construction teams to measure concrete temperature at delivery and monitor it during curing to ensure it doesn’t surpass maximum temperature thresholds.

Although a thermometer may be ideal for measuring temperature at delivery, it is not ideal for measuring internal temperatures within a column, footing, or any other large concrete element. In these areas, temperatures must be measured towards the center of the element—this is where temperatures will be the highest.

To measure these internal temperatures, use COMMAND Center sensors. Just embed the sensors and leave them in the concrete—they automatically measure and record temperatures over time.

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