Most Active Stories
- Cousin, 19, Charged With Murder Of 5-Year-Old After Kidnapping Hoax
- County Execs Propose Partial Funding Plan For The New NY Bridge
- Part Five Of Student Loan Series Focuses On Young Farmers
- Officials Inaugurate High Speed Rail Line In Western Mass.
- Part Two Of Student Loan Series Looks At Adult Learners
Fri February 17, 2012
Concrete's Role As A Building Block In History
In his book Concrete Planet, author Robert Courland discusses why the concrete first used by the Romans is more durable than the concrete used in most present day buildings. Plus, mineralogist Peter Stemmerman tells us about his invention, Celitement and why it is greener than Portland cement.