Research on Mechanical Properties and Mechanism of Soda Residue Soil for Road
To widen the source of subgrade filler and recycle soda residue,high liquid limit clay is modified by soda residue,preparing subgrade filler called soda residue soil.Lime is used to modify clay filler.By comparing their compaction properties,California Bearing Ratio(CBR)and 7d unconfined compression strength(UCS)of the two types of soils,the modification effect of soda residue modifying high liquid limit clay is evaluated.The results show that the maximum dry density of soda residue soil decreases with the increase of soda residue content,and the optimum water content is vice versa.When the soda residue content reaches 30％,the CBR and UCS values of soda residue soil are highest.The compaction property of soda residue soil is similar to that of lime soil.The CBR and UCS of soda residue soil with 30％soda residue content can meet the requirements of relevant specifications,respectively reaching 57％and 64％of lime soil with 9％lime content.The strength mechanism of soda residue soil is mainly derived from the complementary effect of soda residue and clay particles,and the chemical reaction between soda residue and clay.The chemical reaction between soda residue and clay as lime is similar.Soda residue is lime-like,but it also has its own characteristics,that cause soda residue to effectively improve the mechanical properties of clay.
soda residue soillime soilcompaction propertyCBRUCSmechanical mechanism
NETL
NSTL
万方数据
