Journal of Materials and Engineering Structures
Volume 6, Numéro 2, Pages 167-176
2019-06-30

Effects Of Poly Vinyl Acetate On Characteristics Of Expansive Soil

Authors : Zumrawi Magdi M. E. . Mohammed Aya E. .

Abstract

Soil stabilization using polymer materials has become of great potential in recent years. In this regard, an attempt is made to investigate and understand the influence of Poly Vinyl Acetate (PVA) on the engineering properties of expansive soil. A series of treated soil specimens were prepared and tested at four different percentages of PVA (0%, 1.5%, 3.75%, and 5% by weight of dry soil). These treated specimens were subjected to laboratory testing for measuring Atterberg's limits, free swell, compaction characteristics, and unconfined compression strength properties. It was found that PVA had significant influence on the properties of treated soil. An increase in PVA content resulted in an increment of unconfined compressive strength of the soil. Addition of 3.75% of PVA increased the unconfined compressive strength value almost 6 times the value of the virgin soil. On the other hand, an increase in PVA content led to a reduction of free swell and plasticity index. The soil plasticity and free swell indices values were reduced from 62% to 0% and from 190% to 50% respectively by addition of 5% PVA. It can be concluded that an increasing trend for soil strength and decreasing in swelling with addition of PVA, suggesting its potential applications in stabilization of expansive soils.

Keywords

Soil stabilization; Properties; Poly Vinyl Alcetate; Polymer