ScienceAugust 30, 2026
alkali
AL-kuh-ly
Definition
A substance with basic properties that reacts chemically with acidic substances; in this context, it refers to chemical compounds in cement that can react harmfully with glass.
Etymology
Derived from the Arabic 'al-qili,' meaning 'the ashes of the saltwort,' which were historically used to produce soda ash.
In the news
The article discusses an 'alkali-silica reaction,' a chemical process where alkalis in cement react with glass aggregates, potentially causing cracks in the concrete.
Miami researchers tested concrete that replaced sand with leaded CRT glass; a biopolymer helped limit lead
Read the full article ↗The Economic Times