What is the different between cement and concrete?

Althought the terms cemenet and concrete odten are used interchangeably , cement is actually an ingredient of concrete . Concrete is basically a mixture of aggregates and paste . THe aggregates are sand and gravel or crushed stone : the paste is water and portland cement . Concrete gets stronger as it gets older . Portland cement is not a brand name , but the feneric terms for the type of cement used in virtuallly all concrete , just a stainless is a type of steel and sterling a type of silver . Cement comprises from 10 to 15 percent of the concrete mix , by volume . Throught a process called hydration , the cement and water arden and binf the aggregates into a rocklike mass , THis hardening process continues for uyear meaning that conxrete gets stronger as it get older .

So , there is no such thing as a cement sidewalk , or a cement mixer l; ther proper terms are concrete sidewalk and concrete mixer .