Pengaruh Geopolymer Foam terhadap Peningkatan Nilai Cbr Tanah Lunak
DOI:
https://doi.org/10.31004/joecy.v6i1.8699Abstract
ABSTRACT
Soft soil has high water content, low bearing capacity, and low shear strength, making it unsuitable as subgrade material, particularly in coastal areas such as North Semarang. This study aims to analyze the effect of Geopolymer Foam addition on improving the California Bearing Ratio (CBR) of soft clay soil. The Geopolymer Foam consisted of fly ash, a 10 M NaOH solution, waterglass, and a foaming agent. Soil samples were tested using Atterberg Limits, Direct Shear, Standard Proctor, and CBR tests with various mixture proportions. The results show that the CBR value of the natural soil increased significantly from 3.05% to 10.10% with 30% Geopolymer Foam addition. This improvement indicates that Geopolymer Foam enhances the mechanical properties of soft soil and its suitability as a subgrade material. The findings suggest that Geopolymer Foam can serve as an environmentally friendly and sustainable soil stabilization method.
Keywords: Soft soil, CBR, Geopolymer Foam
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