Concrete in Berlin is a composite construction material, composed of cement and other cementitious materials such as fly ash and slag cement, aggregate (generally a course aggregate made of gravel or crushed rocks such as limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures. Concrete solidifies and hardens after mixing with water and placement due to a chemical process known as hydration. Concrete in Berlin is used to make pavements, pipes, architectural structures, foundations, motorways/roads, bridges/overpasses, parking structures, brick/block walls and footings for gates, fences and poles. Concrete is used more than any other man-made material in the world.
Two New York teams are among the finalists (Long Island, NY) Alliance for Green Heat and the New York State Energy Research and Development Authority (NYSERDA) today announced that seven pellet stoves have been chosen as finalists in the Pellet Stove Design Challenge. This international competition, administered by the Alliance for Green Heat, identifies innovative low emissions and high efficiency..