Researchers use coal ash additive to create quick-set, “crack-free” concrete

Researchers from Drexel University believe they have discovered a way that coal ash can be used to help make concrete more durable and crack-free, according to a Drexel press release posted to  Science Daily.

The discovery, which was recently reported in the journal Cement and Concrete Composites, turns waste coal ash into a concrete additive that promotes a uniform hardening process from the inside out, which helps strengthen the internal structure of the concrete. The additive could shorten the time it takes for concrete to harden and improve its durability by lowering the potential for crack formation.