Mitigating The Impact Of The Static And Cyclic Loading On Loose Coastal Saturated Sands Utilizing A Waterproof And Super-Fast Curing Polymer

According to the dramatic increase in construction near loose coastal saturated soils, stabilizing these soils due to saturation conditions has always faced challenges. The main purpose of this investigation is to assess the static and dynamic performance of saturated sand stabilized with polyvinyl acetate powder - as a newly introduced source of polymers which besides helping vegetation grow, owing to its numerous features such as anti-acid, and most importantly waterproof properties and super-fast curing, is superior to its rival, traditional liquid polyvinyl acetate. This paper Analyzes the dynamic properties of soil stabilized based on the results of tensile test crack pattern, microscopic observations of matrix texture, and elasticity modulus of hysteresis loops. Lack of significant change in the strength of samples in saturated and dry conditions indicated waterproofness of polyvinyl acetate powder and revealed a significant rise in the compressive and tensile strength of saturated specimens up to 6% of the polymer. Also, an exponential correlation of unconfined compressive strength (UCS) with direct tensile strength (DTS) was found by data fitting. Also, evaporation tests showed a 7% reduction in evaporation rate with 6% polymer, which can confirm this polymer as a suitable option for improving vegetation. Shear modulus and damping ratio also increased and decreased up to 2% of the polymer, respectively, and by increasing the polymer beyond the 2%, dynamic properties were changed due to the zigzag crack pattern and consequently more ductility of the soil matrix, reduction of elasticity modulus, and increasing the thickness of polymer membranes between soil particles. Ultimately, the research results confirmed polyvinyl acetate powder's efficiency, especially with these tiny amounts, as a potential method for controlling saturated grounds.