Using collapsible loess and red sandstone as raw materials for fluidized solidified soil,experimental research was conducted on the mechanical properties and hydrophysical properties of the mixed filler of collapsible loess and red sandstone for fluidized solidified soil.The results show that the water consumption has the greatest impact on the flowability and compressive strength of the flowable solidified soil filled with collapsible loess red sandstone mixture.The mass ratio of collapsible loess and red sandstone is 65∶35,cement content is 13%,and water consumption is 40%.With the increase of curing age,the compressive strength,cohesion and internal friction angle all increase,while the compressibility,collapsibility coefficient and permeability coeffi-cient show a decreasing trend,when the age is 28 days,the unconfined compressive strength of standard and natural curing speci-mens is 1.24 MPa and 1.02 MPa,respectively.Based on the changes in mechanical strength and hydraulic properties,it is believed that the mixed filling of collapsible loess and red sandstone has the feasibility of engineering application in fluidized solidified soil.
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