NHAI to evaluate the use of Phosphor-Gypsum in highway construction

20 Feb 2023 CW Team

NHAI, in keeping with its commitment to encourage the use of waste material to build ecologically sustainable National Highway Infrastructure, will conduct field trials on NHAI projects for the use of Phosphor-Gypsum in National Highway construction to achieve a circular economy in the use of Gypsum.

Phosphor-Gypsum is a byproduct of the fertiliser industry. A Phosphor-Gypsum road was built by an Indian fertiliser company. The road was evaluated by the Central Road Research Institute (CRRI), and the Indian Road Congress (IRC) has accredited neutralised Phosphor-Gypsum waste material for road construction for a three-year period based on their report.

The fertiliser company and CRRI have been asked to conduct field trials on an NHAI project to evaluate the performance of Phosphor-Gypsum on a National Highway and to build trust among various stakeholders in the use of Phosphor-Gypsum waste material in highway construction.

The NHAI is also encouraging the use of waste plastic in road construction, which has already proven to be very effective. According to studies, roads constructed from plastic waste are durable, sustainable, and extend the life of the bitumen. The construction of one kilometre of four-lane highway contributes to the disposal of approximately seven tonnes of plastic waste.

Similarly, NHAI has used 'Fly Ash,' which is the fine residue of coal combustion in Thermal Power Plants (TPPs), to build highways and flyover embankments. The 135-kilometre-long, six-lane 'Eastern Peripheral Expressway' was built with 1.2 billion cubic metres of fly-ash.

NHAI has been encouraging the innovative use of new materials in order to reduce the carbon footprint, improve durability, and make construction more cost effective.

Also read:
The Delhi-Mumbai Expressway is set to reduce your travel time
WB CM to lay foundation stones of 37 road projects in Siliguri

Resources

03 Jun 2026

Jyoti Structures Launches Heat Safety Drive Across Sites

Jyoti Structures (JSL) has strengthened heat safety measures across its project sites and manufacturing facilities as temperatures rise across India. The company has implemented a Summer Safety Plan covering all transmission line projects to address risks related to heat stress, dehydration and worker fatigue.The initiative includes rescheduling work away from peak afternoon temperatures, provision of drinking water, ORS and lemon-salt solutions, and installation of rest shelters near work areas. Daily toolbox talks, worker health monitoring, first-aid preparedness, emergency transport arrange..

MHADA Declares 82 Buildings Most Dangerous in Central and South Mumbai

The Maharashtra Housing and Area Development Authority (MHADA) has declared 82 buildings as most dangerous across Central and South Mumbai and has appealed to residents to vacate immediately. The list, prepared after structural assessments by the authority, identifies buildings judged to pose imminent risk to occupants and to passersby. Local civic bodies have been asked to coordinate evacuations and to make arrangements for temporary shelter and rehabilitation for displaced households. Officials said the authority prioritised buildings with visible structural distress, severe cracking, tiltin..

Damage Reported At Halwara Airport Terminal After First Rains

Severe damage was reported at the terminal of Halwara Airport during the first major rain spell of the season, prompting immediate concern among aviation and local authorities. Images from the site showed water ingress and visible deterioration of the terminal interior, affecting passenger areas and ancillary services. The airport authority suspended certain operations temporarily to assess structural safety and ensure passenger wellbeing. Preliminary inspections have prioritised electrical systems and roof seals to prevent further water ingress. State aviation officials ordered a formal inqui..