Research Article Effectiveness of Liquid Antistripping Additive for Emulsion-Treated Base Layer Using Reclaimed Asphalt Pavement Material Rishi Singh Chhabra , 1 G. D. Ransinchung R. N. , 1 and Sitesh Kumar Singh 2 1 Civil Engineering Department, Indian Institute of Technology, Roorkee, Uttarakhand, India 2 Civil Engineering Department, Wollega University, Nekemte, Oromia, Ethiopia Correspondence should be addressed to G. D. Ransinchung R. N.; gdranfce@iitr.ac.in and Sitesh Kumar Singh; sitesh@ wollegauniversity.edu.et Received 17 May 2022; Accepted 6 August 2022; Published 26 September 2022 Academic Editor: Mahdi Salimi Copyright © 2022 Rishi Singh Chhabra et al. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In the new global economy, getting natural aggregates (NA) has become a central issue for constructing flexible pavements due to the scarcity of aggregates and the ban on mining in various states in India. is research is an attempt to achieve sustainability by using a liquid antistripping additive for emulsion-treated base layer to improve the performance of Reclaimed Asphalt Pavement Material (RAPM) inclusive aggregates. RAPM was evaluated, with inclusion percentages of 50 and 70 percent, whereas, the control mix was prepared using 100 percent natural aggregate (NA). e effect of inclusion of liquid antistripping additive (ASA) with different RAPM percentages on various properties of ETB mixes, such as maximum dry density, indirect tensile strength, moisture resistance and resilient modulus, was studied. Furthermore, when compared to RAP-ETB mixes without ASA, RAP-ETB mixes with ASA were found to preserve many of their qualities. e present study aimed to propose the laboratory design of optimum bitumen emulsion content (OBEC) for ETB in a simpler manner. For 50 RAP, obtained OBEC was at 4.4%, whereas for 70 RAP, OBEC was obtained at 3.8%. However, for 100 % NA, calculated OBEC was 7.0% as there was 0% RAP in it, hence binder absorption was more. e strength parameter was assessed using the Indirect Tensile Strength (ITS) test. At the same time, the pavement response was measured in terms of Resilient Modulus (MR). MR of 70 RAP mixes was higher than that of 50 RAP mixes, and 100 NA mixes with antistripping additive. Test results were encouraging, and significant improvement in strength was caused by cement filler and antistripping additive. 1. Introduction e increasing cost of binder and environmental concerns attract Government agencies and the construction industry to use other alternatives for pavement construction [1–6]. Moreover, getting a natural aggregate is becoming more challenging due to the ban and restriction in mining. is is equally responsible for shifting to other alternatives of construction [4, 7–9]. To overcome this issue, the use of reclaimed asphalt pavement (RAP) seems a promising alternative. When the mixture of bitumen and aggregate is removed from the flexible pavement by controlled milling up to the desired depth, the collected material is termed RAP material. Moreover, utilization of RAP for the construction of emulsion-treated base (ETB) by cold in- place recycling (CIPR) not only reduces the cost of virgin aggregates but also provides a stiffer base course and re- duces the problem of stockpiling of RAP material due to which its properties get degraded [1, 10–12]. According to Federal Highway Administration (FHWA) reports, up to 33 million metric tons (36 million tons) of excess asphalt concrete is currently being used as a portion of recycled hot mix asphalt, in cold mixes, or as aggregate in granular or stabilized base materials, accounting for 80 to 85 percent of all asphalt concrete currently produced. e quantity of surplus asphalt concrete that needs to be disposed of is expected to be less than 20% of the total amount of RAP produced each year. Hindawi Advances in Civil Engineering Volume 2022, Article ID 6280681, 12 pages https://doi.org/10.1155/2022/6280681