Subgrade Stabilization Using Recycled Vehicle Oil and Stone Powder

Alejandro S.D.A.; Sebastian V.S.D.; Milton M.F.C.; Arturo C.V.S.; Siello V.N.C. · Civil Engineering and Architecture (2025) · DOI: 10.13189/cea.2025.131343

Resumen

The purpose of the research is to determine the behavior caused by the addition of recycled vehicle oil (RVO) and stone powder (SP) in subgrade stabilization, using an applied methodology, a quasi-experimental design, and a quantitative approach. The natural state soil has an A-6 classification (low plasticity clayey soils), with a plasticity index of 16%, a maximum dry density of 1977 kg/m³, and an optimal moisture content of 10.30%. Additionally, the unconfined compressive strength is 265863.64 kg/m², and its California Bearing Ratio (CBR) is 12.20%, indicating it is a good subgrade in relation to this last property. Subsequently, the addition of RVO and SP to the natural sample showed favorable results in all evaluated properties except for the unconfined compressive strength. In this regard, the dosage of 6% RVO and 15% SP presented the best values, reducing the plasticity index to 8%, increasing the maximum dry density (MDD) to 2047 kg/m³, lowering the optimal moisture content (OMC) to 4.90%, the unconfined compressive strength obtained a value of 100251.00 kg/m², and the CBR at 95% increased to 25.50%, classifying it as a very good subgrade. Finally, it is concluded that the subgrade soil with the addition of RVO and SP improves its physical-mechanical properties.

Instituciones: Universidad Nacional de Barranca; Universidad Nacional José Faustino Sánchez Carrión; Universidad César Vallejo