Modification of Hot Mix Asphalt Using Ethylene Vinyl Acetate (EVA) for Hot and Arid Regions
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EVA modifier, HMA, Thin surfacing, ITS, UCS
Abstract
Permanent deformation or rutting is a primary failure mode of hot mix asphalt (HMA) pavements especially in hot and arid region. The aim of this study was to achieve the viability of using Ethylene Vinyl Acetate (EVA) as a modifier of hot mix asphalt, for alternative industrial asphalt in flexible pavement preservation material at hot and arid region. The type of asphalt used was 60/70 pen. This research was conducted to get the difference about strength and durability aspect on asphalt modified with EVA with several percentages namely 2%, 4%, 6%, 8% and 10%. All of the hot mix asphalt (HMA) was prepared based on Marshall Mix design properties in terms of Marshall Stability Test (MS) to get Optimum Bitumen Content, strength and durability. The tests conducted were Marshall Stability Test, Indirect Tensile Strength Test (ITS) in different temperatures (20ºC, 40ºC and 60ºC) an unconfined Compressive Strength Test (UCS) at temperature 45ºC. The Marshal properties, unconfined compressive strength (UCS), Indirect Tensile Strength test (ITS) were conducted.The result showed that marshal stability, Marshal Quotient increase with increase in EVA modifier. However, Marshal Flow decreases when EVA modifier was increased. All the values of unconfined compressive strength (UCS) and Indirect Tensile Strength test (ITS) increased with an increase in EVA modifier. Therefore, EVA could be used as aggregate substitute for flexible hot mix asphalt at hot and arid region because it is temperature tolerant and can prevent asphalt cracking.
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