Автор работы: Пользователь скрыл имя, 06 Января 2014 в 22:52, доклад
Building material is a material which is used to build constructions. Many naturally occurring substances, such as clay, rocks, sand, and wood, even twigs and leaves, have been used to construct buildings. A part from naturally occurring materials, many man-made products are in use, some more and some less synthetic. The manufacture of building materials is an established industry in many countries. Here we can see some materials, which will characterize the houses.