CD Tesis
Sifat Fisik Dan Korosi Beton Abu Terbang Untuk Sekat Kanal Pada Lahan Gambut Bagian Hilir
Peat soil is derived from plants that began half-rotted so it high contains of organic material. So that peat is one type of soil that has a high risk of fire in dry conditions and exposed to high temperatures. Therefore, a material for constructing canal blocks is needed so that they are not easily burned. Meanwhile, downstream part of the peatland experiences a dual attack, namely acid attack from peat and chloride from seawater. Fly ash concrete is expected to be a solution so that the canal blocks can function as a canal blocking material as it planned.
The material design for this canal blocking consists of 2 (two) types of mixtures, namely normal concrete as a control and fly ash concrete with a 30% substitution of fly ash to cement. This study aims to compare the effect of fly ash substitution on cement in concrete for testing compressive strength, porosity and corrosion rate. This research uses concrete with a quality test of 35 MPa and a test object for compressive strength and corrosion rate with dimensions of 210x105 mm but in testing the corrosion rate using steel with a diameter of 10 mm which is planted in the concrete at the time of casting. For porosity using a test object with dimensions of a half cylinder with dimensions of 210x105 mm and testing was carried out at the age of 0, 28, 56 and 91 days since the initial treatment of the concrete for 28 days.
Based on the test results that the concrete with a mixture of fly ash by 30% maintains the stability of the compressive strength of the concrete against aggressive environments in the three immersion methods. In terms of porosity contained in fly ash concrete, it looks better because it is not easily penetrated by chloride attack compared to normal concrete. Aside from the results of the corrosion rate highest in normal concrete in the amount of 0.00026 mm / year at the age of 28 days in the concrete mix water in the concrete of fly ash while 30% were the highest corrosion rate in water mixture when 28 days old concrete that is equal to 0.00026 mm/ year.
Keywords : Corrosion, Peat, Canal, Dual Attack, Downstream
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