How to distinguish the agglomeration time of cement pipes
Today we talk about the moment of aggregation of cement pipes . After mixing cement and water, it will become a plastic semi-fluid. After passing through for a period of time, the cement slurry gradually loses plasticity and adheres to its original shape. This phenomenon is called condensation (divided into initial setting and final setting). Then it entered the hardening phase, and the strength of the cement was gradually added.
During the construction, a certain scale is required for the cement condensation time. If the condensation is too fast, the concrete will quickly lose fluidity and then affect vibration. On the contrary, if the condensation is too slow, the construction speed will be affected. Therefore, the initial setting time and final setting time of the standard and regular cement should be within a certain scale.
The measurement of agglomeration time is performed by using cement paste of standard consistency under certain temperature and humidity conditions. Calculated from the time of adding water, until the test needle sinks into the slurry, 0.5 to 1. 0mm away from the bottom plate, and the required time is the initial setting time. At this moment, the slurry loses its plasticity at the beginning; it does not exceed 1 when the test needle sinks into the slurry. Stop at Omm. The required time is the final setting time. At this moment, the pulp completely loses its plasticity and begins to enter the hardening period. Different cement thicknesses have different time to condense, but as long as we investigate and practice more, we will be able to do more with less!