Abstract:Fluidized stabilized soil, as a new type of backfill material with good fluidity and controllable strength, can improve the construction efficiency and quality in backfilling projects. This technology also enables the resource utilization of construction spoil and mud. Therefore, accelerating the improvement of the technical standard system for fluidized solidified soil is of great significance for the promotion and application of this technology. The applicable scopes, main technical indicators and test methods of eight current standards related to fluidized stabilized soil in China are sorted out and analyzed. The experimental studies are conducted on the size effect among the fluidized stabilized soil strengths under different standard specifications. The results indicate that the technical standard system for fluidized stabilized soil consists of group standards and local standards in China. However, there are still problems such as inconsistent expression of terms, obvious differences in the index system, and different testing methods for core indicators (fluidity, compressive strength), which lead to the problems such as poor comparability of technical parameters and disputes over technical adaptability of fluidized solidified soil under the different standards. And the size effect of fluidized solidified soil strength is related to the magnitude of strength, but the correlation is not significant. It is recommended to accelerate the formulation of industrial and national standards for the fluidized stabilized soil, and to guide the gradual unification of group standards and local standards during the process of revision and new compilation in order to promote the application and popularization of this technology.
