The Future of Road Construction in India

India is building roads at an unprecedented pace. With the National Highways network crossing 1.5 lakh KMs and ambitious targets under Bharatmala Pariyojana, the demand for construction materials — cement, bitumen, aggregates, steel, and geosynthetics — has never been higher. The roads we build today must last longer, cost less to maintain, and leave a smaller environmental footprint.

The insights have been taken from Indian Roads Congress (IRC) journal. Here are five key takeaways — and what they mean for contractors, suppliers, and procurement teams sourcing construction materials today.

## 1. Geopolymers Are Replacing Cement in Cold Mix Asphalt — And the Results Are Impressive

Cold Mix Asphalt (CMA) has always been the more eco-friendly than Hot Mix Asphalt (HMA). It does not require heating during production, which means lower energy bills on-site and significantly reduced carbon emissions. But CMA has traditionally struggled with low early strength and moisture damage, limiting its use to low-traffic rural roads.

Why this matters for material buyers and suppliers:

Geopolymer-modified CMA achieved a stiffness modulus 27 times higher than conventional cold mixes after just 3 days, reaching performance levels comparable to traditional hot mix asphalt. And because geopolymers are made from industrial by-products like fly ash and blast furnace slag — materials already widely available in India — they offer a dual benefit: better roads and lower material costs.

For contractors, this means CMA can now be considered for higher-traffic corridors and this represents a growing market opportunity as IRC/

## 2. Bitumen Quality Varies More Than You Think — Even Within the Same Grade

A study from IIT Bombay evaluated twelve different sources of VG40 bitumen — the standard grade specified by MoRTH for expressways and high-traffic pavements — and found striking differences in how these binders age during construction.

All twelve sources met the IS 73:2013 specification on paper. But when subjected to short-term aging tests (simulating what happens during mixing and laying), their performance diverged significantly. Viscosity ratios ranged from 1.3 to 3.5, and ductility values varied from 32 cm to 69 cm — a more than two-fold difference.

What this means for procurement:

For material procurement teams, the takeaway is clear: source matters. Specifying VG40 bitumen by grade alone may not guarantee uniform pavement performance. Working with suppliers who provide comprehensive test data — beyond just the IS 73 minimum requirements — can reduce the risk of premature cracking and rutting on your projects.

## 3. India's Iconic Bridges Are Pushing Foundation Engineering to New Limits

The IRC journal features a detailed case study of Delhi's Signature Bridge — India's first asymmetrical cable-stayed bridge across the Yamuna. The 575-metre structure required foundations on highly variable terrain: fractured rock, sloping surfaces with 10-metre drops across a 17-metre diameter, and alluvial river soils.

Projects of this scale consume enormous quantities of concrete (M25 and M40 grades), structural steel, reinforcement bars (25mm and 32mm diameter), steel girders, and specialized construction chemicals. The Signature Bridge case illustrates the kind of material specifications that major infrastructure projects demand — and the importance of suppliers who can deliver to tight quality parameters and project timelines.

As India plans more cable-stayed bridges, elevated corridors, and river crossings under Bharatmala and Smart Cities initiatives, contractors and quantity surveyors need reliable procurement partners who understand these demanding specifications.

## 4. Sustainable Materials Are No Longer Optional — They Are Becoming Standard

The shift toward sustainable materials means growing demand for fly ash, GGBS, rice husk ash, geosynthetics (geocells, geogrids, geotextiles), and cold-application road marking materials. Suppliers who can document the environmental credentials of their products — carbon footprint data, recycled content percentages, compliance with green building standards — will have a competitive advantage as government agencies increasingly factor sustainability into tender evaluations.

## 5. Pavement Design Is Getting Smarter — And Material Selection Is the Key Variable

The materials you choose for each pavement layer — subgrade, base, binder course, and wearing course — have a cascading effect on the overall pavement life and maintenance costs.

Getting the material specifications right at the design stage, rather than correcting deficiencies during construction, saves significant time and money. This is where accurate Bill of Quantities matters what is available in the market and what gets delivered to site.

What This Means for Constromat Users

Whether you are a contractor preparing a bid for a highway project, a quantity surveyor finalizing a Bill of Quantities, or a material supplier looking to serve infrastructure clients, staying informed about these trends is not just useful — it is essential for competitive advantage.

**Constromat simplifies this complexity. Our procurement platform connects you directly with verified suppliers and every other material that goes into building India's roads and infrastructure.