STRENGTH BEHAVIOR OF SUBGRADE SOIL MIXED WITH SAND MANUFACTURING DUST AND FIBER

Sharon Raju ； Sreevalsa Kolathayar ； Anil Kumar Sharma

《Journal of GeoEngineering》 13卷2期 (2018/06) Pp. 79-84

https://doi.org/10.6310/jog.201806_13(2).4

摘要

This paper introduces the potential of sand manufacturing dust (SMD), generated during the production of manufactured sand, in pavement applications. An attempt has been done to improve the subgrade properties of weak soil, with the addition of SMD and along with polyvinyl alcohol (PVA) fibers. The introduction of new materials, the design of experiments, further analysis and interpretation from the research content of this manuscript. The optimum percentage of SMD and the PVA fiber to be added to the soil for better performance of subgrade is estimated and their suitability for use in pavement construction has been demonstrated. It was observed that addition of 10% of SMD to the soil performed better in terms of California bearing ratio (CBR). A series of tests were conducted with 10% SMD, 3% cement and varying percentages of fiber (0, 0.5%, 1%, and 1.5%). The performance has been evaluated in terms of CBR, unconfined compression strength (UCS) tests, split tensile tests and cyclic triaxial test. The test results indicated that the soil stabilized with SMD and PVA fibers performs better under both static and dynamic loadings. The improvement in strength with suggested modifications was found to be very significant (up to 50-fold increase).

關鍵字

Subgrade ； polyvinyl alcohol fiber (PVA) ； sand manufacturing dust ； California bearing ratio ； cyclic loading