Construction of Sustainable Pavements Through Recycling

Dr. Ambika Behl, Dr. G. Bharath, Dr. Siksha Kar, Central Road Research Institute, New Delhi

Construction of Sustainable Pavements Through Recycling

Increased connectivity and improved road infrastructure developed in the country in the recent past has resulted in significant increase in the growth of traffic in terms of the number of vehicles and axle loads. However, the increased construction activities have resulted in an increased demand of materials and thereby allowing depletion of naturally occurring materials like stone aggregates. This has made the concerned engineers to explore the alternate methods including re-use of materials from existing pavements. Beneficial utilization of recycled materials can result in an important opportunity to save the mining and use of virgin materials, preserve energy, and save landfill space.

The main components of asphalt mixture are asphalt binder and aggregate, which have the potential to be replaced by recycled materials. The largest portion of pavement in terms of mass and volume are aggregates. The unit price of the aggregates is comparatively low with relatively low environmental impact on production. Correspondingly, because aggregate is exercised in large quantities, is non-renewable, and incapable to mine near its point of use, it can play a vital role in pavement sustainability.

Milling of distressed pavements for their complete or partial use is an accepted norm now to save fresh aggregates and bitumen. Recycling or reuse of pavement material is a very simple but powerful concept. In a time when highway professionals determine pavement rehabilitation techniques based on cost, performance, and environmental sustainability, in-situ recycling processes offer the best alternative to optimize these benefits. With strict attention paid to pre-engineering, mix design formulation, construction, and quality control, pavements constructed using these techniques offer the ability to decrease life-cycle costs and the environmental impact.

The conventional method of providing bituminous surfacing on flexible pavements requires significant amount of materials and energy. Therefore, in order to reduce consumption of fuel and aggregates, pavement recycling technology may be adopted for Indian roads (Reddy et al., 2013). Also, there is a problem of the scarcity of aggregates, which forces truck delivery of materials from long distance. The use of diesel for running these trucks contributes to emission of pollutants such as particulate matter, nitrogen oxides, carbon dioxides and sulphur dioxides. Many of the diesel engine emissions have been identified as carcinogenic, and harmful to the human health, even at occupational and environmental levels of exposure. For a lead of 200 km (which is common in north India), requires 18 million liters of diesel in transportation alone (Mallick and Veeraraghvan, 2010).

Based on the process adopted in recycling the asphalt mix, it can be broadly classified as central plant recycling and in-situ recycling. If the RAP (recycled asphalt pavement) is modified at a plant, away from construction site then the process is known as central plant recycling. In-situ recycling process the RAP modified in place, where from it is available. Further, the RAP could be heated to condition it. If heat is applied, then the process is known as hot mix recycling. In case of cold mix recycling, old materials are conditioned using recycling agent (like, low viscosity emulsion or foamed bitumen) without application of heat.

CSIR-Central Road Research Institute (CSIR-CRRI) has recommended recycling of pavement in several projects of maintenance, rehabilitation and up gradation of roads. This article presents the case study of rehabilitation and up grading of two road sections in India, Ranchi Ring Road using hot in place recycling (HIPR) and NH-31, using cold in place recycling (CIPR).

NBM&CW September 2019

Click Here
To Know More / Contact The Manufacturer
Please fill in your details, we will contact you as soon as possible
Choose Title from the listPlease let us know your name.
Please let us know your Designation.
Invalid Input
Please let us know your email address.
Please let us know your City.
Please let us know your Contact Number.
Please brief your query.
Our other value-added services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Equipment & Machinery
Invalid Input
Building Products
Invalid Input

Suggestive Framework for Mitigating Project Delays in Indian Roads & Highways Sector

Time delay had been a common phenomenon associated with nearly all road construction projects in India but very little effort and studies had been done to amputate the phenomenon.The objectives of this study provided industry Read More ...

Characterisation of Foundry Sand Waste Material for Road Construction

Characterisation of Foundry Sand Waste Material for Road Construction Different types of waste materials viz. copper slag, zinc slag, steel slag, manganese slag, phosphogypsum slag, cinder, red mud, kimberlite, lime sludge, foundry sand, coal ash, jarofix, jarosite, manganese slag, marble dust etc Read More ...

Thin Whitetopping Cement Concrete Overlays on Bituminous Pavements:

Concrete is a very durable and versatile material for the construction of roads and highways. Several highways, expressways, and city roads have been constructed with cement concrete in the recent past in India. Cement concrete Read More ...

A Transformative Approach to Highway Construction

An 18-mile stretch of Georgia interstate is pushing the technological envelope with respect to safety and sustainability in road construction. By leveraging solar energy, recycled tires, vehicle telematics data and valuable roadside Read More ...

Accelerated Pavement Testing

Accelerated Pavement Testing images/Road-Pavements/40594-APTtesting.jpg The Indian road network is mainly built with flexible pavements, because of ease of construction and low initial cost as compared to concrete pavements. The flexible pavements are designed as per Indian Roads Congress Read More ...

Pavement Maintenance Management System

An efficient road transportation system is of vital importance to the economy of a nation. Road transport occupies a dominant position in the overall transportation system of India due to its advantages in terms of easy availability, flexibility Read More ...

Cement Grouted Bituminous Mix for Flexible Pavements

India has the second largest road network with heterogeneous traffic conditions. Although the road construction in India has improved a lot in the last two decades, at times, it is observed that the pavements, especially in urban areas Read More ...

Whitetopping Durable and Cost-effective Solution for City Roads

Concrete is a very durable material for the construction of roads and highways. Cement concrete has been used for the construction of new roads, highways and also for the rehabilitation of existing distressed bituminous pavements Read More ...

Utilisation of Waste Materials in Road Construction

The Road sector has been receiving a lot of attention by the central as well as state governments during the last two decades. As a result, new roads are being constructed and existing ones are being upgraded to meet the traffic demand Read More ...

StrataWeb®: An Innovative Solution for Embankment Slope Protection Stabilization

Side slope erosion has always been an issue for highway embankments. Especially during the monsoons, these slopes pose a challenge. The Larsen & Toubro-IDPI SPV, constructing its 163km long Rourkela-Sambalpur toll-way road Read More ...

Role of Concrete in - Road Infrastructure

In India, the emphasis in recent years has rightly been on the housing and infrastructure, including, amongst other things, roads, power and irrigation sectors. The Global Infrastructure Outlook reflects that rising income levels Read More ...

Ammann ARS 121 Soil Compactors deployed at 354-km Purvanchal Expressway

Ammann ARS 121 Soil Compactors are bringing efficiency to an enormous, high-profile roadbuilding project in India. The compactors are handling soil work for a key section of the 354-km Purvanchal Expressway, the longest current Read More ...

Ashoka Buildcon constructs Package 4 of landmark Eastern Peripheral Expressway project

Ashoka Buildcon, which was awarded package 4 of the EPE project, constructed 22km of the 135 km EPE, at a cost of ₹789 crores. It built three grade separators, one ROB, 12 VUPs, 22 PUPs, four minor bridges and 20 Read More ...

Wirtgen: Cold milling machines have a decisive impact on quality of road rehabilitation

Wirtgen offers the widest range of cold milling machines in the industry. Customers can choose from more than 30 different types of machines, with each also available with a variety of milling widths. The lower Read More ...

Smart Pavement Materials and Emerging Technologies

Smartness describes self-adaptability, self-sensing, and multiple functionalities of the materials. These characteristics provide numerous possible applications of such materials in manufacturing and civil Read More ...

Repair of Scaled Surface Areas of Newly Constructed Cement Concrete Pavement Slabs

After 2014, the speed of the construction of cement concrete road for national highways and expressways, in cities and even at village level has significantly increased due to the policy adopted by the Government of India Read More ...

New Building Material & Construction World

New Building Material & Construction World
MGS Architecture

Modern Green Structures & Architecture

Modern Green Structures & Architecture

Lifting & Specialized Transport

Lifting & Specialized Transport

Indian Infrastructure & Tenders Week

Indian Infrastructure & Tenders Week