Application of Modified EPS Particles in Lightweight Soil Mixed with Dredged Sludge
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Abstract:
The compound stabilizer was made using the EPS (expanded polystyrene) particles treated by self-made modifier and then mixed with the dredged sludge from the Bohai Bay in different mixing ratios to obtain the lightweight soil mixed with dredged sludge. The effects of modifier on the surficial properties of EPS particles were analyzed using the contact angle measurement and scanning electron microscopy (SEM) test, and the impacts of EPS particles with different quantities of modifier on the density, compression strength, and compression yield strain of the lightweight soil were investigated. The results indicated that the introduction of modifier can enhance the combination ability of EPS with sludge particles and improve the workability and structural stability of lightweight soil. When the quantity of modifier was 0.33% of that of EPS particles, the compression strength of lightweight soil increased while the density of lightweight soil decreased, but the effect on compression yield strain was insignificant.
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