Geopolymer Concrete (image) Louisiana Tech University Share Print E-Mail Caption This is a 5,000 lb. geopolymer concrete block cast using fly ash. Credit Louisiana Tech University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.