Compressive Strength on Clay Shale Soil Stabilization with Asphalt Emulsion and ALWA Perlite Victor Firstkiel Feber Naess (1), Syahril S (1a), Nursyafril (2), Indra Noer Hamdhan (3)
(1) Magister of Applied Infrastructure Engineering Study Program, Department of Civil Engineering, Politeknik Negeri Bandung, Indonesia
(2) Department of Civil Engineering, Faculty of Engineering, Politeknik Negeri Bandung, Indonesia
(3) Department of Civil Engineering, Faculty of Engineering, Institut Teknologi Nasional, Indonesia
Abstract
Subgrade conditions unsuitable for use as pavement subgrade, such as clay shale, result in low-strength subgrade soils that cause the pavement to deform and crack easily. When in a dry and undisturbed state, clay shale will undergo expansion and weathering, resulting in a notable decrease in strength. Therefore, it is crucial to enhance the intrinsic quality of clay shale soils to achieve optimal bearing capacity and ensure the capacity to support superimposed structures. This study aims to augment the compressive strength value of clay shale soils with the use of artificial light weight aggregate (ALWA) perlite and asphalt emulsion stabilization materials. ALWA perlite possesses pozzolanic properties that are beneficial for improving soil quality and enhancing bearing capacity. The asphalt emulsion component plays a role in increasing soil strength by facilitating stronger interparticle bonding. In this study, a uniform asphalt emulsion concentration of 8% was employed. Various concentrations of ALWA perlite were tested, including 4%, 8%, 12%, and 16%. The results demonstrated that an 8% mixture of asphalt emulsion and ALWA perlite was optimal for enhancing the compressive strength of clay shale soil. This resulted in a 106% increase from 0.39 to 0.81 in the soil^s compressive strength value.
