Some recommendations for the use of truck mixed concrete in paving are to avoid segregation of the ingredients in the concrete during discharge by discharging the mixer at full drum speed with an unrestricted opening and with a nearly vertical drop onto the subgrade. During cold weather concreting, the concrete being delivered to the site should be brought to a temperature between 50 and 60 degrees. The batching plant must have the facilities to deliver warm concrete to the trucks using steam boilers and adequate hot water. During hot weather, there are a number of ways in which the truck mixer operator can help keep down the temperature of the newly placed concrete. He should avoid over long mixing, use cold mixing water, and keep exposure of the mixers to the hot sun at a minimum while unloading.