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Relation of Microstructure and Unconfined Compression Strength of Soil Stabilized with TerraZyme

TerraZyme as an enzymatic soil stabilizer was used in this research. The stabilized soil was mixed with TerraZyme in proper proportion to determine the relationship of unconfined compression strength and microstructure caused by the introduction of TerraZyme. The experimental results show that the unconfined compressive strength of stabilized soil with TerraZyme added is higher than that without TerraZyme. The micrographs of scanning election microscopy (SEM) indicate that the microstructure of the stabilized soil sample with TerraZyme added is denser than that without TerraZyme. This is because the particles of stabilized soil sample treated with TerraZyme are more coarse and blocky than those untreated with TerraZyme. The stabilized soil is with fewer pores than that without TerraZyme. This kind of compact microstructure should be the basis of higher unconfined compressive strength of stabilized soil with TerraZyme added.