137th Day Of Lockdown

Maharashtra49026232728117092 Tamil Nadu2850242275754690 Andhra Pradesh2069601204641842 Karnataka164924842322998 Delhi1427231282324082 Uttar Pradesh113378668341981 West Bengal89666630601954 Bihar7179446294400 Gujarat68855517922604 Assam5549737225132 Rajasthan4941835186763 Odisha4255028698292 Haryana4005433444467 Madhya Pradesh3729827621962 Kerala3170019147103 Jammu and Kashmir2392716218449 Punjab2193014040539 Jharkhand165427503154 Chhatisgarh11408831987 Uttarakhand89015731112 Goa7947559570 Telangana751354330615 Tripura6014408437 Puducherry5123291475 Manipur3466192610 Himachal Pradesh3206200813 Nagaland26578247 Arunachal Pradesh204913263 Chandigarh137482023 Meghalaya10234236 Sikkim8544061 Mizoram5672890
Nation Current Affairs 05 Dec 2019 Hyderabad: Pervious ...

Hyderabad: Pervious concrete can check global warming

Published Dec 5, 2019, 1:40 am IST
Updated Dec 5, 2019, 1:40 am IST
Can also recharge groundwater, says IIT Tirupati team.
Pervious concrete could be this country’s answer to many effects of global warming, including the urban heat island (UHI) phenomenon.
 Pervious concrete could be this country’s answer to many effects of global warming, including the urban heat island (UHI) phenomenon.

Hyderabad: Pervious concrete could be this country’s answer to many effects of global warming, including the urban heat island (UHI) phenomenon.

Compared to conventional concrete, which is impermeable, pervious concrete is porous in nature. This entails a host of advantages over conventional materials: if used correctly, pervious concrete can help reduce ambient temperatures around it and recharge groundwater.


A team of researchers from IIT Tirupati have been working on the subject for the past several years. Poonrachandra Vaddy, a Masters student and a part of this team, presented his technical paper at a conference on UHI in Hyderabad on Wednesday.

Vaddy said the biggest advantage of using pervious concrete was its heat absorption capacity.

“The characteristics of this material are very distinct. In conventional concrete, the heat is absorbed and reflected by the top layer. Here, the heat is conducted throughout the material,” he said.


Explaining this further, B Krishna Prapoorna, assistant professor at IIT Tirupati, department of civil and environmental engineering, said, “The absorption of heat is a very important advantage. Due to this, the light is not reflected into the atmosphere. This means the ambient temperature can be reduced by nearly 10-15 degrees celsius. Also, the surface of pervious concrete slabs are cool to touch. One can walk barefoot on them, something that is impossible on conventional concrete slabs.”

Prapoorna explained that the porosity of the material also answers the problem of water run-off. “In the case of conventional concrete, the water is unable to seep through and is wasted in the form of run-off. But in pervious concrete, the water seeps through and goes on to recharge the groundwater table,” he said.


Also, he added, this helps in cooling down the surroundings through evaporative cooling. This is a principle that is used in water or desert coolers.  “Since the material absorbs water, on a hot day, the water will get evaporated. This will cool down the surroundings,” he said.

Pervious concrete also does not use any sand, making it cheaper than conventional concrete. “The cost of pervious concrete is cheaper. Typically, it is a mixture of cement, rock aggregate and admixture,” said Prapoorna.

Research on the subject currently is still in the nascent stage. While the principle of pervious concrete has existed since the nineteenth century, it has gained popularity due to its relevance to global warming mitigation.


In the current form, pervious concrete is durable enough to be used for applications such as footpaths, walkways, parking lots and bicycle tracks.

Location: India, Telangana, Hyderabad