Determination method for restrained expansion rate and expansion rate of expansive concrete from plasticity to hardening

The invention relates to a determination method for restrained expansion rate and expansion rate of expansive concrete from plasticity to hardening. The determination method comprises the steps of mixing an expansive agent, determining and processing data. Special equipment for the determining and data processing is plasticity restrained expansion rate determinator which comprises a data acquisition device, a mould, an expansion rod, a sensor, a target and a sheet. The determination method provided by the invention has the advantages that the entire process of determining the expansive concrete from no expansion rate to the end of expansion reflects hydration characteristics of the expansive agent and a matching relation between the expansive agent and the strength development of the concrete, thus providing data support for the development of expansion agent products. A restrained expansion rate curve and an expansion rate curve of the expansive concrete from plasticity to hardening are completed through the special equipment of the plasticity restrained expansion rate determinator, the determination data is accurate and intuitive, and the working efficiency is high.