Researchers have developed a type of porous concrete that can essentially clean itself. The team added oil, an emulsifier and hydrophobic silicone polymer to wet concrete, and then dried and heated the concrete to evaporate the oil to leave behind polymer-coated pores. If the building industry embraces this material, it could lead to a wide range of different structures that require a lot less maintenance. Click the below link from the website engineering.com to get the full story.

https://interestingengineering.com/researchers-create-self-cleaning-concrete-that-repels-liquid

Article by  Donna Fuscaldo, published on November 20th,  for Interesting Engineering Newsletter.