Sustainable Subgrade Soils: Impact of Pine Ash and Donax Obesulus Dust

Abstract

Road infrastructure plays a crucial role in economic growth and promoting decent employment by connecting different regions and cities through roads and highways. The use of recycled materials offers an alternative to optimize and reduce resources while improving the physical and mechanical properties of the soil, which in turn reduces costs. The purpose of this study was to evaluate the effect of pine ash (CP) and Donax obesulus dust (PDO) on the natural soil sample with dosages of 10% and 16%. It is a basic type study, with a quantitative approach and according to its explanatory level, with a quasi-experimental design with post-test. The most optimal dosage was 16% CP and 16% PDO, a variation with respect to the natural soil (NS) of MDS of 1,680 gr/cm³ to 1,799 gr/cm³, OCH of 5.87% to 2.00% and CBR of 8.4% was achieved. to 24.17%. According to statistical tests, the parallel dosages of both materials contribute to good compaction, bearing capacity and resistance in low quality soils intended for subgrade.