Vietnam is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, Thailand across the Gulf of Thailand to the southwest, and the Philippines, Malaysia and Indonesia across the South China Sea to the east and southeast.[d] Its capital city has been Hanoi since the reunification of North and South Vietnam in 1976, with Ho ...
Cement. 1  Cement is a binder. Similar to flour in a recipe, the purpose of cement is to hold the other materials together. 2  Concrete is a composite of aggregate (such as sand or gravel), cement, and water. Itâs like a cookie. 3  The basic composition of mortar might seem similar to concrete, but what really sets it apart is how it is used.
While cement and concrete are related they are nowhere near the same thing! Cement, which is the abbreviation of the correct name, Portland cement is a fine grey powder which looks very much like grey flour. Most people have never seen cement. Concrete is a mixture of cement, sand, rock, water and small amounts of additives. Concrete is the material we encounter in our everyday lives. The relationship between cement and concrete is similar to the relationship between flour and cake.