Rahmadani, Niko (2025) Analisis Stabilisasi Tanah Tempatan Menggunakan Semen Ditambah Additif Difa Soil Stabilizer Di Kota Tanjung Pinang Provinsi Kepulauan Riau. Other thesis, Universitas Islam Riau.

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Abstract

Tanjung pinang City is located in the Riau Islands Province, in general, the types of soil in Tanjung pinang City are Baouksit, Coral, silty sand. The density and CBR value are quite good with CBR value ranging from 8% to 10%. However, in the implementation of pavement construction, it is always found that there are soil conditions that have a large enough Plasticity Index value so that in the compaction process it is very difficult to get a density figure that meets the minimum standards. The purpose of this research is to obtain soil density and unconfined compressive strength or UCS values through the process of soil stabilization with cement and difa soil stabilizer additives. And how much the stabilization cost is. This research was conducted with quantitative methods in this case by conducting laboratory testing. Soil stabilization is done by mixing native soil plus cement and difa soil stabilizer additive. The composition was 1 m3 of native soil plus cement at 8%, 10%, 12%, 14% of the dry weight of the soil and 1 kg/m3 of native soil additive was mixed. The testing methods were Standard Proctor and UCS tests to obtain the density and unconfined compressive strength values of the stabilized soil. The soil density value based on the standard proctor test is showing increasing results, where the original soil density value is 1,323 kg/m? and the soil with 8% cement mixture is 1,460 kg/m? , 10% is 1,470 kg/m? , 12% is 1,470 kg/m? and 14% is 1,500 kg/m? . The value of unconfined compressive strength or UCS test results for soil sampels in Soaked conditions is where the original soil cannot be tested for UCS because the original soil sampel cannot maintain its shape when soaking, for the original soil with a mixture of 8% cement plus 1 kg of additive, the UCS value is 214.32 kN/m² , 10% is 527.57 kN/m² , 12% is 989.19 kN/m² , 14% is 1,005.68 kN/m² . Unsoaked is where the original soil shows a UCS value of 138.64 kN/m² , for the original soil with a mixture of 8% cement and 1 kg of additive obtained a UCS value of 735.27 kN/m², 10% of 942.23 kN/m², 12% of 1,023.93 kN/m², 14% of 1,813.51 kN/m². Keywords: Density, Unconfined Compressive Strength Value, Cost of Stabilized Soil

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