Civil Engineering and Architecture 11(5): 2405-2412, 2023 http://www.hrpub.org DOI: 10.13189/cea.2023.110512 Performance of Asphalt Wearing Course against the Immersion Effect of Tidal Flood (Rob) with Added Materials Polyethylene and Fine Aggregate Slag Juny Andry 1,* , Pratikso 2 , Rachmat Mudiyono 2 1 Post-Graduated Program of Civil Engineering, Sultan Agung Islamic University, Indonesia 2 Department of Civil Engineering, Sultan Agung Islamic University, Indonesia Received March 5, 2023; Revised April 24, 2023; Accepted June 11, 2023 Cite This Paper in the Following Citation Styles (a): [1] Juny Andry, Pratikso, Rachmat Mudiyono , "Performance of Asphalt Wearing Course against the Immersion Effect of Tidal Flood (Rob) with Added Materials Polyethylene and Fine Aggregate Slag," Civil Engineering and Architecture, Vol. 11, No. 5, pp. 2405 - 2412, 2023. DOI: 10.13189/cea.2023.110512. (b): Juny Andry, Pratikso, Rachmat Mudiyono (2023). Performance of Asphalt Wearing Course against the Immersion Effect of Tidal Flood (Rob) with Added Materials Polyethylene and Fine Aggregate Slag. Civil Engineering and Architecture, 11(5), 2405 - 2412. DOI: 10.13189/cea.2023.110512. Copyright©2023 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract Rob or tide water is a flood of seawater or rising sea level caused by high tide inundating land. Heavy traffic and tidal immersion on main roads result in permanent deformation and require quality asphalt that is resistant to tidal immersion and traffic loads. The use of a combination of LDPE and aggregate slag is an unprecedented update. Polyethylene (PE) plastic waste provides water resistance, therefore the combination can be a new Job Mix Formula that is able to withstand tidal immersion (rob) allowing it to be used in the construction of road structures (Flexible Pavement). The duration of immersion is 7 days, 14 days and 21 days and the soaking method consists of immersing with a continuous pattern and soaking with a periodic/ cyclic pattern (intermittent). Job Mix Formula that can be used on asphalt concrete wearing course modification is a combination of 50% Slag aggregate and 6% LDPE, while asphalt concrete wearing course modification of 0% and 100% Slag Aggregate grades with LDPE 0%, 2%, 4%, 8%, 10% and 18% cannot be used as road pavement because it does not meet the requirements of Bina Marga technical specifications. Keywords Permanent Deformation, Immersion, Tide, Asphalt Concrete Wearing Course, LDPE 1. Introduction Rob or tide water is a flood of seawater or rising sea level caused by high tide inundating land [1]. Tidal water makes the asphalt's adhesion towards the aggregate weaker so leading to deformation when the road pavement is passed. Tidal water also comes from the sea which contains high levels of acidity, chloride and sulfate levels that can weaken the adhesion ability of asphalt to maintain the bonds between asphalt either cohesion or adhesion [2]. A way to overcome tidal water immersion is to modify the asphalt using an added material, namely polymer [3]. Asphalt wearing course with polyethylene additives and slag fine aggregates is a mixture of asphalt materials where plastomeric polymers are added, namely Low Density Polyethylene (LDPE) and steel slag aggregates with the aim of gaining strength against tidal immersion and traffic loads with the main axle load so that this asphalt has durability and good stability up to 21 days of immersion. The use of a combination of LDPE and aggregate slag is an unprecedented update. Polyethylene (PE) plastic waste provides water resistance, therefore the combination can be a new Job Mix Formula that is able to withstand tidal immersion (rob) allowing it to be used in the construction of road structures (Flexible Pavement). Heavy traffic and tidal immersion on main roads result in permanent deformation; it requires quality asphalt that is resistant to tidal immersion and traffic loads. Similar problems can also be encountered even on straight roads due to slowing speed and heavy truckloads and trailer loads. The construction of asphalt that is resistant to tidal immersion in accordance with the specifications is required.