Analysis of Binder Absorbent Layer Thickness Using Paper Test
DOI:
https://doi.org/10.35134/jcivil.v10i2.96Keywords:
Prime Coat, Paper Test, Flexible Pavement, Asphalt Emulsion, ThicknessAbstract
Prime coat is an important layer in flexible pavement because it provides bonding between the granular base and the subsequent asphalt layer. This study aimed to determine the application rate and estimated thickness of prime coat using the paper test method and to compare the results with the technical range stated in the General Specifications 2018. The research used an experimental approach in the Pavement Laboratory of Universitas Putra Indonesia YPTK Padang. Five paper-test samples measuring 25 cm × 25 cm were placed at different test points before manual application of emulsion asphalt. The net asphalt mass retained by each sample was converted into application rate and then into thickness using an asphalt density of 950 kg/m³. The measured application rates were 1.117, 0.766, 0.870, 0.886, and 1.123 kg/m², with an average of 0.952 kg/m². The estimated average thickness was approximately 1.00 mm. All samples were within the specified range of 0.4–1.3 kg/m². The results indicate that the manual application was technically acceptable, although control of spraying uniformity remains important to prevent excessive local application.
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