Durable and Economical Technology for Bituminous Surfacing of Rural Roads

Rural Roads


The Pradhan Mantri Grameen Sadak Yojna (PMGSY) has been one of the most successful flagship programmes launched by former Prime Minister Atal Bihari Vajpayee in 2000 for constructing a wide network of rural roads across India. During the last 17 years, a total of 5,29,975 km of PMGSY roads have been constructed connecting villages of over 500 people, which is a commendable task!

Two technologies (surface dressing and premix carpet) are specified in India’s ‘Rural Roads Manual’ for bituminous surfacing of rural roads such as those under PMGSY. Either of these two technologies are permitted. Both are also standardized by the Indian Roads Congress (IRC).

Surface dressing (also called chip seal) consists of spraying a thick film of bitumen over the compacted stone base layer (called water bound macadam) with the help of a bitumen truck tank distributor at a specified rate. This is followed by spreading stone chips (aggregate) at a specified rate by a mechanized chip spreader (available from many manufacturers in Gujarat and costing less than Rs. 2.5 lakhs). Stone chips are then compacted with a road roller so as to embed/fix them (about 70%) into the sprayed thick bitumen layer. This completes the surface dressing operation as illustrated in Figure 1.

The premix carpet (PMC) simply consists of single size (about 12 mm) stone chips mixed with 3.5% bitumen by weight at a hot mix plant. PMC is highly open graded because the mix does not contain any fine aggregate (sand). This mix is laid in 20 mm thickness manually or with a paver. A sand seal coat is provided at the top.

The objective of this paper is to discuss these two technologies in detail and recommend the one which is better both in terms of durability and economics.

History of Bituminous Surfacing

Rural Roads
When the author was serving as a highway engineer in the Rajasthan PWD during the early 1960s, it was very common to use bituminous surface dressing (SD) or chip sealing on most types of roads. Surface dressing was very effective in water-proofing the water-bound macadam (WBM) roads because of heavy bitumen application rate followed by chip application. Surface dressing was scheduled once in 3 or 4 years on all roads. Very few potholes dotted the roads at that time, and traffic volumes were generally less. Road construction was largely manual and hardly mechanized. Bitumen for surface dressing was applied with perforated tin cans. Spreading the surface aggregate (chips) by hand was an art learnt through practice, usually by swirling the basket containing the aggregate.

NBM&CW September 2018

Click Here
To Know More / Contact The Manufacturer
Please provide your details we will contact you as soon as possible
Please let us know your name.
Invalid Input
Please let us know your Designation.
Invalid Input
Please let us know your City.
Please let us know your State.
Please let us know your Country.
Please let us know your Contact Number.
Please let us know your email address.
Please brief your query.

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 ...

ArcelorMittal Long Products - Benefits of steel solutions in bridge design

Today's modern bridge construction projects face totally new challenges. The public, the regulators and the authorities demand structures that are cost effective during their planning, execution, lifetime and dismantling. Read More ...

From Yarn to Bridges – Strata Takes Another Giant Leap in Technical Textiles

Strata Geosystems, a global leader in the soil reinforcement industry, has opened its new state-of-the-art manufacturing facility, which will meet the growing demand for geosynthetic products in India and around the Read More ...

Bogibeel Rail-cum-Road Bridge

There are a lot of legends and prophesies floating with the current of the mighty Brahmaputra River as it tracks its course from Tibet to Bangladesh, roaring down through narrow chasms and gobbling up land in its pursuit Read More ...

Advantages of Precast Concrete in Constructing Highways & Bridges

Prefabrication of any structure component off-site during highway construction (or reconstruction) offers major time and user cost savings in comparison with the traditional cast-in-place methods of construction. Read More ...

Long-life Pavements - European & American Perspectives

Long-life Pavements European & American Perspectives Road infrastructure investment has increased less in many countries than road traffic. If these trends continue, the outcome will be increasing intensity of Read More ...

Performance Management for Durable Pavements

Satisfactory pavement performance can be assured only with an appropriate design with a well-calibrated algorithm, material selection based on the appropriate mix design, proper processing of the materials for Read More ...

Experimental Study on Tunnel Excavation Muck for Road Construction

Substantial parts of India are covered by hills and Himalayas stand foremost among them. The border areas in the North and North-East of our country are mountainous with steep topography, difficult and hazardous Read More ...

Geocells For Pavement Reinforcement

Roads are essential for the economic growth of the country, and unlike the railway network, various classes of roads-from expressways to rural road, assure last mile connectivity. India’s growing economy requires Read More ...

Pervious Concrete Technology for Urban Roads and Pavements

Pervious Concrete Technology for Urban Roads and Pavements In recent years, the rise in employment and higher standard of living, amongst numerous other factors, has led to a gradual shift of people from rural to urban 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