concretequiz

|| > Look at this [|illustrated history of concrete] //Click on the back button to come back to this page// > > || || 3000 BC || > || || 100 AD || > || || 1756 || > || || **1824** ||
 * **Concrete**
 * by Dafne González** ||
 * **Find out how much you know about concrete!**
 * 1) When was concrete first made?
 * || 9000 BC ||

2. Check all the possible components of concrete

3. What is the purpose of cement in concrete?
 * || **water** ||
 * || **cement** ||
 * || gravel ||
 *  || **sand** ||
 * || air ||
 *  || **steel ** ||
 * || rods ||

I think cement is an important raw material when making concrete because it gives to it hardness and makes it very stable

4. What role does water play in producing concrete? I think water is important to mix the materials used to make concrete > > > || || It is stronger in tension || > || || It is the same in either ||
 * 1) Is concrete stronger in compression, tension, or the same in either? Check out [|this lab] to find the answer.
 * || **It is stronger in compression** ||

Concrete can last 50,000 years
 * || **True** ||
 * || False ||