Investigation of the Effects of Waste Tire, Water Content and Relative Density on Soil Dominant Frequency in Separate Grained Soils by Microtremor Method

This paper presents the effects of waste tires, water content, and relative density on the soil dominant

frequency based on experiment. Cylindrical molds with a diameter of 30 cm and height of 50 cm are prepared to

understand the effects of these materials. The molds are filled with sand at different relative densities (60% and

80%). In addition, samples are prepared by adding waste tire particles at different rates (0%, 0.5%, 1%, and 2%)

to the sand to achieve different relative densities and water contents (0%, 5%, 10%, and 15%). The soil dominant

frequency and horizontal/vertical (H/V) amplitude are determined using the microtremor technique by measuring

each cylinder for 60 min using a broadband seismometer. Microtremor data are analyzed using the H/V spectral

ratio (Nakamura) method. The experimental result shows that the waste tire particles added to the sand decrease

the H/V amplitude. The most suitable environment features a relative density of 60%, which is achieved using

1% waste tires and 0% water content. Meanwhile, the most suitable environment has been achieved using 0%

water content and 0.5% waste tire ratio for 80% relative density. Using the prepared composite material with

waste tires as an additive on the soil may reduce the destructive effects of earthquakes.