Effect of Calcium Carbide Residue and Salt (NaCl) Addition on Mechanical Properties of Soil

Ulfariansyah Ulfariansyah, R M Rustamaji, Vivi Bachtiar


Soils exhibit varied characteristics and properties, with poor-quality soil posing risks to construction integrity. Soil stabilization, typically achieved through chemical means involving additives like Salt (NaCl) and Calcium Carbide Residue (CCR), is employed to mitigate these risks. This study aims to assess the mechanical properties of soil following treatment with 16% NaCl and varying percentages of CCR (5%, 10%, and 20%) over curing periods of 0, 7, and 14 days. Tests included compaction test, California Bearing Ratio (CBR), Unconfined Compressive Strength (UCS), and direct shear. Results revealed the original soil's optimal moisture content of 29%, maximum density of 1.30 gr/cm³, CBR of 3.2%, UCS of 3.30 kg/cm², cohesion of 0.21 kg/cm², and internal friction angle of 23.95°. Post-stabilization, a decrease in optimum moisture content was observed, with the lowest reduction in the 16% NaCl-treated soil (20,15%). Maximum density increased most notably in the 16% NaCl and 20% CCR mixture (by 1.38 gr/cm³). Additionally, CBR, UCS, cohesion, and internal friction angle exhibited the highest enhancements in the 16% NaCl and 20% CCR mixture at 14 days of curing, respectively increasing by 7.83%, 5.91 kg/cm², 0.46kg/cm², and 48.55°.

Kata kunci: Calcium Carbide Residue (CCR), mechanical properties, NaCl, soil stabilization

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DOI: https://doi.org/10.20527/bpi.v7i1.254


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