IIT Indore develops eco-friendly concrete to cut CO₂ emissions by 80%

Researchers at the Indian Institute of Technology Indore (IIT Indore) have created a cement-free, eco-friendly concrete that could significantly reduce the construction industry's carbon footprint and costs.

Using geopolymer technology, the new concrete is made from industrial by-products like fly ash and ground granulated blast furnace slag (GGBS), completely replacing traditional cement.

Cement production is known to be one of the leading sources of global carbon dioxide emissions.

Initial results suggest that the new material could cut carbon emissions by as much as 80% and lower construction expenses by nearly 20%.

"This development is a step toward transforming the way we build our future infrastructure as stronger, faster, and greener," said Dr Abhishek Rajput, who led the research team. "The goal is to find a practical solution that benefits both the environment and the construction industry."

One of the key features of the geopolymer concrete is its ability to develop strength quickly. This makes it ideal for emergency construction, including military bunkers, road repairs, disaster-relief shelters, and precast infrastructure like railway components.

It also eliminates the need for water curing, an added advantage amid rising water shortages.

Ordinary Portland Cement Concrete (PCC) contributes about 8% of global CO₂ emissions, mainly due to limestone processing and the energy-intensive production process.

Highlighting the larger impact of the innovation, IIT Indore Director Prof Suhas Joshi said, "This is an excellent example of how IIT Indore is contributing to national priorities through sustainable technology. Such developments align with India's vision for green infrastructure and carbon neutrality."