Research Of Soda Residue Performance In Haighway And Microstructure Characteristics

Soda residue is generated during the production of soda ash, which Severely restrict the development of economic and harm the environment. In order to consume the soda residue, the paper will mix soda residue and fly ash to explore the feasibility of embankment fill pad. Through laboratory tests, the paper detects the physical indicators, mechanical indicators and microstructure of. The result is blow:(1)Through laboratory tests, the physical indicators of soda residue soil is tested. The paper discusses the moisture content, grain size and compaction f soda residue soil in different proportions. The results show that when the ratio of soda residue and fly ash is 4: 1, the soda residue soil can meet the requirements in embankment fill pad.(2)Through laboratory tests, the mechanical properties of soda residue soil have been studied. The paper tests its performance of compression and shear. In order to improve the mechanical properties fatherly, the paper adds some cementations materials in the soda residue soil. When the cementations material is 5 percent, the soda residue soil show perfect properties. The paper researches the bearing capacity indicators, rebound modulus and California bearing ratio. The results show that the soda residue soil can meet the requirements in embankment fill pad.( 3) With the help of high power microscope, the paper observe the microstructure of soda residue soil. With sodium sulphate content increased, the particles of soda residue soil tend to close and the cementing force increase. Thus the unconfined compressive strength enhancement of soda residue soil is improved. The fly ash will generate more colloid in an alkaline environment. The micro-porosity of soda residue soi were measured in IPP software. The results show that the diameter, area and perimeter of the pore will decrease with the sodium sulfate content increasing.