The road construction industry in India is undergoing a paradigm shift: strong demand, higher investments, and the emergence of newer and more innovative technologies is giving a renewed focus on sustainable developments. These technologies include the use of improved materials for road construction like recycled materials, plastic waste, asphalt, etc.

Colored Asphalt: The Changing Face of Road Construction in India

There is an emphasis on recycled materials and reducing the amount of energy required to produce asphalt. Low-temperature asphalt is one such development. Asphalt’s core ingredients are aggregate, bitumen, additives, and air. Bitumen is produced in various grades of hardness. Depending on the mix and grade of bitumen used, it is possible to lay road surfaces to meet a variety of requirements.

Colored asphalt is increasingly being used not only in road construction but also in gardens and landscape architecture. Colored asphalt pavement can be used to differentiate bike paths from roads and direct traffic. It is also suitable for highlighting dangerous points and in making areas more attractive. For instance, functional colour differentiation can highlight pedestrian and bicycle paths, thus increasing the safety of road users.

LANXESS is offering Bayferrox® and Colortherm® pigments for colouring bituminous mixtures used as raw materials for all asphalt types such as grid mastic asphalt, noise-reducing and semi-rigid asphalt, and asphalt concrete. The color is influenced mainly by the type of bitumen used. Dark bitumens are most commonly colored red by using inherently heat-stable iron oxide red pigments with high tinting strength. By using a clear polymer bitumen, the color spectrum can be extended to even yellow or green surfaces.

LANXESS pigments provide further decisive benefits. Bayferrox® 130A red pigment, for example, provides the highest heat stability in the market. Since it is produced via the Laux-Process, the product’s colour is not influenced even at the high manufacturing temperatures that are applied during the production of mastic asphalt. Bayferrox® 130A is also available in low-melt PE bags which can be dosed manually and directly into the asphalt mix.
Rapid growth in industrial development and economy in last two decades has demanded upgradation of the existing road network in the country. Though there is a huge road network in the country, it is still inadequate to meet accessibility and mobility requirements

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Namrata Bichewar, Regional Manager - Maharashtra, Gabion Technologies India Pvt Ltd, discusses the company’s contribution in constructing green highways using Bio-Engineering Erosion Control methods and solutions. The government plans to construct 26 green expressways

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A Stone Matrix Asphalt (SMA) pavement laid at Parimal Underpass in Ahmedabad Municipal Corporation has completed 7 years. The underpass, which used to get submerged under almost 2m depth of water due to waterlogging in the monsoons every year

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Dr. Abhishek Mittal, Principal Scientist, CSIR-CRRI New Delhi, discusses the effects of changes in temperature due to climate change on pavements with respect to their material, design, construction, and maintenance. A long-term shift in temperature and weather

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Massive road development work for huge road network of the country’s national assets is essential for overall development of the country. However, major road development projects consume a huge quantity of soil and crushed aggregates. The consumption of these materials

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Following the launch of AEW’s road repair machine ‘Dr. Road’ by Shri Nitin Gadkari, Minister for Road Transport & Highways, Shatish Panchal, Director, AEW Group, informs that the company is geared up to promote the machine to State PWDs and CPWDs

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Evaluating the Quality of Asphalt Binders and Plant Produced Asphalt Mixes through Recovered Asphalt Testing and other Mix Properties, Amma Wakefield, MASc, PEng Canadian Regional Engineer Asphalt Institute, Paving-grade asphalt binders are specified based

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The Global Road Construction & Safety Conference 2022 will be held on 30th November 2022, at Hotel Taj Palace, New Delhi, in collaboration with CSIR- CRRI, Bitumen India Forum (BIF), National Highways Builders Federation (NHBF)

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Subgrade makes the formation level of the road crust. The material specifications of subgrade material are therefore more demanding than the soil used in general fill or embankment. In some construction projects, it becomes difficult to get the required subgrade

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Atasi Das, Assistant Vice President, G R Infraprojects, explains the concept of the Perpetual Pavement in India’s expressway constructions and its practical implementation with due consideration of layers, materials, and thicknesses

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Dr. Rakesh Kumar, Senior Principal Scientist & Pankaj Goel, Senior Technical Officer, Rigid Pavements Division,CSIR-Central Road Research Institute (CRRI), New Delhi, give information on the Performance of Curing Compounds in Strengthening

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The construction and maintenance of roads with flexible pavements in very cold regions where annual temperatures range between +30oC to -35oC has got its own challenges. The bitumen in the asphalt layer becomes hard at such low temperatures

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The Bundelkhand site team achieved yet another feat on 15 Jan 2022 by completing 13 deck slabs of varying types in just 46 days. Therefore, it is a demonstration of exemplary display of overall project executing capabilities

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Er. Devjyoti Paul, Project Manager & Er. Harpreet Singh, Chief Project Manager, B&SEC, share the technical and construction features of three bowstring girder ROBs, recently constructed under Package I & III of Purvanchal Expressway in the state of Uttar Pradesh

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Use of Extruded Polystyrene Sheets (XPS) in the construction of the Zojila Approach Road has been especially effective as XPS is the most suitable, convenient, and cheaper solution for mitigating frost action on pavements, increasing the life of pavements

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The Indian road network is the second largest globally, with a length of around 63.86 lakh km. The outbreak of the virus towards end-FY20 had created panic globally, leading to the temporary suspension of economic activity

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Roads and Railways boost awards; tenders up marginally Overall tendering grew 5% YoY during H1FY22 Awarding activity grew at a 2-year CAGR of 22% in H1FY22 Infrastructure credit near all-time highs

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There are many challenges being faced by the highway sector such as ensuring availability of construction materials and machinery, timely completion of projects, availability of trained human resources

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Practical Recommendations for Construction of Longitudinal Joints in Hot Mix Asphalt (HMA) Pavements Rajib B. Mallick, Ralph White Family Distinguished Professor, Civil and Environmental Engineering, Worcester Polytechnic Institute (WPI), Massachusetts, USA, and Veeraragavan

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