Monitoring the concrete temperature can give useful insight about the curing. First of all, you can reduce problems with overheating concrete (often seen in large concrete structures, also called mass concrete) and a too large temperature gradient can occur might lead to cracks in the finished concrete structure. This cracks breaks the concrete surface and serves as channels for chlorides to the reinforcing steel (rebar) and course damage.
The other benefit of monitoring the concrete temperature is to follow the curing process/maturity of the concrete. If you have made a calibration of the concrete mix, you will be able using the maturity method with high precision tell something about the concrete strength during the concrete curing.
So in other words too high temperatures can cause:
- Increased water use and thereby added costs
- Increased shrinkage leading to cracks in concrete
- Lower final concrete strength
- Potential corrosion attack on reinforcements due to chloride attacks