Is it possible to mix the concrete in a mixing truck for eight hours?
The concrete was stirred in the blender truck for eight hours and if it was added, there was no problem. In the case of not add water to let out a bit to see, if haven't lost the plastic concrete, slump of qualified, can continue to use, otherwise, had to be abandoned, or as aggregate, points repeatedly to stir.
I think the main thing is to look at the state, but now the concrete is usually required to be discharged within four hours after the discharge (guangdong area).
When the concrete is removed from the mixture, it is best not to exceed 150min according to the temperature. But now with the development of the additive technology, and high performance concrete initial setting time and perhaps even control to 13-15 hours (Shanghai world financial center base raft concrete). You can discriminate in this way. Concrete stirred 8 hours, not casual water, workability change is not very big, can use, but 1 can back, part of discharge, stir some higher than the another two grades of concrete, quick stir for a few minutes and pouring into the part or not is not very important part of the bearing. According to the admixture, add admixtures, whisk for 3-4min, and reduce the use of one or two grades. If you have added a lot of water to the site, there has been a significant change in the ease of use.
