Phosphor-gypsum, a by-product of fertilizer production, has been a concern for its weak radioactive properties due to naturally occurring uranium and thorium. However, a recent collaboration between the National Highways Authority of India (NHAI) and the Indian Government’s Department of Fertilizers is exploring the possibility of using this waste material in the construction of national highways.
Background
Phosphor-gypsum is mainly composed of gypsum, which is commonly used in construction. However, its weakly radioactive properties have raised concerns about its safe use. As a result, it has not been widely used in construction and is usually stored indefinitely.
The NHAI’s decision to explore the use of phosphor-gypsum waste material in highway construction is part of a larger initiative to achieve a circular economy. The collaboration with the Indian Government’s Department of Fertilizers is conducting field trials to study the use of this waste material in the building of national highways.
Recent developments
An Indian fertilizer company recently constructed a road using neutralized phosphor-gypsum waste material, which was accredited by the Indian Road Congress (IRC). The IRC is the apex body of highway engineers in India and sets standards for highway construction and maintenance.
The use of phosphor-gypsum waste material in the construction of national highways has several advantages. Firstly, it will reduce the environmental impact of the waste material by utilizing it in a productive way. Secondly, it will reduce the demand for natural resources, such as sand and gravel, which are used in the construction of highways. This will help in preserving the natural resources and environment. Lastly, it will contribute to the reduction of carbon emissions by reducing the need for transportation of construction material.
