A Laboratory Study on Open and Dense Graded Cold Asphalt Emulsion Mixtures for Surface Courses

Wulandari, Paravita Sri and JOHNSON, and SANTOSO, LEONARDO and KRISTIANTO, YUDDY and BILLY, MOURICE (2023) A Laboratory Study on Open and Dense Graded Cold Asphalt Emulsion Mixtures for Surface Courses. [UNSPECIFIED]

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Abstract

Cold Asphalt Emulsion Mixture (CAEM) is considered as an eco-friendly asphalt mixture because it eliminates the emission. It is produced at ambient temperatures and reducing the requirement to heat aggregates and bitumen prior to mixing process, so it is good for energy saving in pavement construction. In application, there are two type gradations of aggregate for cold asphalt mixture, dense gradation and open gradation. A series of laboratory works were conducted to analyse the performance of dense and open graded cold mixture for surface courses, which is the main objective of this study. Marshall Samples were kept indoor at room temperature for 7 days prior to Marshall Test to obtain the effect of curing process for cold mixtures. All samples were tested using Marshall Tests for stability and flow. The results show that dense graded mixtures need less bitumen content than open graded mixtures. For cured samples, dense graded mixtures produces higher Marshall Stability than open grades mixtures, while uncured samples have almost the same Marshall stability value for both gradations. For open graded mixtures, curing process reduce the porosity of mixtures.

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