Regina Moran

Paper and cardboard found very wide application and play a huge role in the modern world. The ancient Egyptians more than 3 thousand years ago, used similar to the properties of the material that is made from the fibers of the papyrus. More than half produced paper accounts for printed products, while the other half [...]

The word "cement" comes from the German "zement" or Latin "caementum", which means gravel, broken stone. Cement has been known since ancient times. . The first variety of cement were gypsum and lime. The Egyptians and Greeks in the construction structures used cement. Some of the buildings of those times still remain, indicating a tremendous [...]