Abstract
The mechanical properties of sandy soil can be effectively improved by the incorporation of water-based polymer and glass fibers. In order to study the reinforcement effects of a type of water-based organic polymer and fiber glass on sand, three strength tests (unconfined compression test, direct shear test and tensile test) and scanning electron microscopy were carried out. A series of polymer content, fiber content and dry density were selected for the tests. The results revealed that the composite reinforcement of water-based organic polymer and fiber glass can improve the strength. With an increase in polymer content and fiber content, the unconfined compression strength, the cohesion, and the tensile strength increase. The internal friction angles maintain a relatively stable state. All three strength properties increase with an increase in dry density. The results can be considered as the reference for sand reinforced engineering.
Highlights
Natural sand material has certain deficiencies in strength, thereby affecting the stability of foundations and slopes
The strength of sand reinforced by the water-based organic polymer and fiber glass was thoroughly studied in the tests
The results show that the compaction and a certain amount of a water-based organic polymer and fiber glass can significantly improve the strength of sand
Summary
Natural sand material has certain deficiencies in strength, thereby affecting the stability of foundations and slopes. The research and application of new materials that can improve the strength of sand has become a hot topic in the world. More research about fiber as a physical reinforcing material has been carried out [7,8,9,10]. Among the artificial synthetic fibers, fiber glass is one of the most commonly used fibers in engineering practices. The mechanical properties, such as the tensile strength of fiber glass, is significantly higher than that of other artificial synthetic fibers. When fiber glass is used with loose sand, the integrity of fiber reinforced sand is not improved
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