Concrete is a plastic liquid, made of aggregate, water and cement. This substance is used in nearly every structure today, but not everyone knows exactly what goes into the common mixture. Even thousands of years ago, the Romans were familiar with the process and used concrete often in their construction. Use of concrete was infrequent after the Roman Empire fell until it was rediscovered in the 18^th century. Many people these days often confuse concrete with cement. The truth is that cement is one of the ingredients in concrete. There are many different recipes for concrete, but the basics do not change much. Continue reading →