INSWAREB explores irradiated cement materials to boost concrete durability

The Institute of Solid Waste Research and Ecological Balance (INSWAREB) has proposed using reactor facilities at the Bhabha Atomic Research Centre to produce samples of Irradiated Complementary Cement Materials for advanced studies on improving the durability of concrete structures.

Speaking to the media people here on Monday, INSWAREB Director General N. Bhanumathidas and Director N. Kalidas said that global studies, including recent research by the University of Tokyo, have shown that radiation can lead to the failure of concrete in nuclear structures. Based on these findings, the institute concluded that higher amorphous content in fly ash and other complementary cement materials enhances the durability and service life of concrete.

They said proposals have been submitted to the Prime Minister’s Office and the Department of Atomic Energy seeking approval to produce irradiated cement materials in Indian reactors. If successful, INSWAREB plans to propose a commercial reactor to convert mineral quartz, fly ash and rice husk ash into ICCMs for use in the cement and concrete industry.

Mr Kalidas said BARC has agreed in principle to provide access to the Dhruva reactor, though the initial samples would be limited. He added that INSWAREB had also approached the Advanced Test Reactor at Idaho National Laboratory in the US, which suggested collaboration with American universities.

The institute has also offered nano concrete as a solution for radiation-resistant shield walls in nuclear reactors. As nano concrete contains a high proportion of fly ash, which includes radiation-resistant mullite, it offers improved protection. INSWAREB has proposed a shield wall design with a dense aggregate core covered by nano concrete plates on both sides to ensure radiation attenuation, durability and longer service life.