Karakteristik Nilai CBR California Bearing Ratio Dan Permeabilitas Pada Tanah Lempung Dengan Penambahan Renolith Dan Fly Ash

Abstract

Soil consists of relatively weak bonds between particles, often caused by carbonates, organic matter, or oxides that settle between the particles. As a construction foundation, soil sometimes does not meet the required specifications, such as clay, which has many limitations when used as a subgrade. Chemical additives can be used for soil reinforcement, such as Renolith and Fly Ash. In this study, each sample was substituted with 3% Renolith, along with Fly Ash additions of 10%, 15%, and 20%. For the California Bearing Ratio (CBR) test, three original soil samples were used, with an original CBR value of 25.38%. This value increased to 31.03% with the addition of 3% Renolith and 0% Fly Ash, showing that Renolith enhances CBR, with further increases seen with 3% Renolith plus 10%, 15%, and 20% Fly Ash. For permeability testing, one original soil sample was used, with each composition variation weighing 500 grams. The permeability coefficient of the original soil was 0.0017%, which increased to 0.0039% with 3% Renolith and 0% Fly Ash. This demonstrates that Renolith improves permeability, with further increases achieved by adding 3% Renolith plus 10%, 15%, and 20% Fly Ash. Using Renolith and Fly Ash can enhance the CBR and permeability coefficients, improving the load-bearing capacity of clay soil.