Goutham Sarang

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Address: Assistant Professor (Senior)
School of Mechanical and Building Sciences
VIT University - Chennai campus
Vandalur Kelabmakkam road
Chennai - 600127
Tamil Nadu, INDIA

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Perspectives on the utilization of reclaimed asphalt pavement in concrete pavement construction: A critical review

Case Studies in Construction Materials

Evaluation of Performance of Reclaimed Asphalt Pavement Mixtures Using Acetone as Rejuvenator

Lecture notes in civil engineering, Nov 11, 2022

A Study on the Effectiveness on the Polyethylene Strips in Cement-Treated Soil

Lecture notes in civil engineering, Nov 24, 2022

Replacement of stabilizers by recycling plastic in asphalt concrete

Use of Recycled Plastics in Eco-efficient Concrete, 2019

Abstract Plastic is a major source of continuing pollution and poisons the environment. Environme... more Abstract Plastic is a major source of continuing pollution and poisons the environment. Environmental hazards due to waste plastics can be addressed to a large extent by using them effectively in road construction. The incorporation of different types of virgin or recycled polymers improves the performance of asphalt concrete. In dense graded mixtures they act as a modifier to improve the mixture properties, namely, Marshall characteristics, resistance to moisture action, rutting, etc., thus ultimately improving the pavement life. In case of gap and open graded asphalt concrete mixtures, some suitable stabilizing additive may be required due to their aggregate structure. Instead of the costly polymers and other commercial stabilizers, waste and recycled plastics can be used, which act as an effective stabilizer material and also provide economical and environmental benefits. The incorporation of plastics to asphalt mixtures can be accomplished either by mixing it with asphalt binder (known as wet process) or by adding directly to aggregates (known as dry process). Many researchers observed dry process as a better method compared to wet process, and considered it as practically more viable. Still, if proper mixing of plastics with asphalt binder, by using high power stirrers, is ensured, wet process also provides a good plastic-modified asphalt. This chapter discusses on the need of stabilization of asphalt concrete, different stabilizer materials that can be adopted, and the possibility of using recycling plastics instead of costly virgin polymers. Suitable methods for incorporating waste plastics, advantages of each, and performance of waste plastic added mixtures are discussed in detail with a brief information on some field evaluations. Considering the availability, economy, and environmental benefits, waste plastics or recycling plastics (after processing) can be recommended as an efficient stabilizer and modifier in asphalt concrete to enhance the mixture stability performance.

Characteristics of aggregate gradation, drain down and stabilizing agents in stone matrix asphalt mixtures: A state of art review

Journal of Traffic and Transportation Engineering (English Edition), 2022

A Review on the Performance of Additives in Warm Mix Asphalt

Urbanization Challenges in Emerging Economies, 2018

Investigation on the Effect of Anti Stripping Additives on the Moisture Sensitivity of Bituminous Concrete

Materials for Sustainable Infrastructure, 2018

Moisture damage is one of the most common reasons for the premature deterioration of Hot Mix Asph... more Moisture damage is one of the most common reasons for the premature deterioration of Hot Mix Asphalt (HMA) pavements. Over the years, extensive research has been carried out by scientists and engineers on this subject; however, pavements still succumb to early failure from infiltrating moisture. A very popular method of minimizing the moisture susceptibility of asphalt pavements is by the use of anti-stripping agents. These additives are chemical substances that alter the physicochemical properties of the asphalt by making it more hydrophobic. This study focuses on the effect of anti-stripping agents on the moisture susceptibility of Bituminous Concrete (BC) mixture. The anti-stripping agents used were hydrated lime and Zycosoil. Three mix types were studied, namely: BC mix without additive, BC mix with hydrated lime and BC mix with Zycosoil. Viscosity Grade (VG) 30 bitumen was used in all three groups of samples. Marshall mix design method was adopted and specimens were prepared at bitumen contents 4.5, 5.0, 5.5, 6.0, 6.5 and 7.0% by weight of mixture. Volumetric properties and Marshall characteristics were determined for each specimen, and using them, the Optimum Binder Content for each mixture was obtained. Moisture susceptibility of mixtures was assessed using Tensile Strength Ratio, Retained Stability and Stripping Value. From the experimental results, it is observed that the addition of anti-stripping agents had a significant positive influence on the results of the test properties being evaluated in each test.

Goutham Sarang

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