Assessment of the suitability of Kuwait oil sands for beneficial reuse

Abstract

The purpose of this study was to investigate the potential beneficial use of the oil-contaminated sand of Northern Kuwait as a construction material. Samples with three Portland cement contents (4, 8 and 10% by weight of sand) and three different organic contents (9, 21 and 33%) were cured for seven days and tested for unconfined compressive strength, moisture content, and organic content. The early strength evaluation of stabilized material is an important factor in landfill caps and construction fill beneficial use applications to provide necessary strength for machinery operations. The results of this research show that the Portland cement content has a direct relationship with strength gain in the oil-contaminated sand of Kuwait. These results align with related studies discussing the coating effect of organic matter (such as crude oil) on soil grains, which inhibits the Portland cement hydration reactions and adversely affects the strength gain of stabilized material. Ultimately, the results of this study show that 8% Portland cement, of the total weight of the soil, mixed in the form of a slurry with 1 to 1 or 2.5 to 1 (water: cement) can fulfill the strength requirement to be reused beneficially.

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“…The stone columns are referred to as floating stone columns because, when a thick, soft layer is deeper than 25 meters, they do not reach the stable layer of soil. (Datye, 1982;Abdullah et al, 2020) (1,2). (2017) (Fattah et al) Length to the diameter of the stone column The strength of stone columns was allegedly affected by several factors, including the column's stiffness, length, diameter, and replacement ratio for the area, according to several past studies (3).…”

Improving weak soils with reinforced stone columns

“…The stone columns are referred to as floating stone columns because, when a thick, soft layer is deeper than 25 meters, they do not reach the stable layer of soil. (Datye, 1982; Abdullah et al, 2020) (1,2). (2017) (Fattah et al) Length to the diameter of the stone column The strength of stone columns was allegedly affected by several factors, including the column's stiffness, length, diameter, and replacement ratio for the area, according to several past studies (3).…”

Effect of several patterns of floating stone columns on the bearing capacity and porewater pressure in saturated soft soil

“…Stone columns are used to increase the shear strength of soft soil strength, reduce and expedite the consolidation of soil, and reduce the liquefaction potential of soils. In the case of thick soft layer with a depth greater than 25 m, the stone columns do not reach the stable layer of soil, so they are called floating stone columns (Datye, 1982;Abdullah et al, 2020;Karkush and Jabbar, 2021). Datye (1982) stated that stone columns can mount the loads and may be constructed in short intervals like floating pillars compared to the deep foundations.…”