Search results
Results from the WOW.Com Content Network
Most cement kilns today use coal and petroleum coke as primary fuels, and to a lesser extent natural gas and fuel oil. Selected waste and by-products with recoverable calorific value can be used as fuels in a cement kiln (referred to as co-processing), replacing a portion of conventional fossil fuels, like coal, if they meet strict specifications.
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin , and is usually made from limestone .
The paper used in papercrete can come from a variety of sources, including newspaper, junk mail, magazines, books. A mixer is used to pulp the mix before this is combined with cement or clay. Depending on the type of mixer, the paper may need to be soaked in water beforehand.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Move over, Wordle, Connections and Mini Crossword—there's a new NYT word game in town! The New York Times' recent game, "Strands," is becoming more and more popular as another daily activity ...
Conservators and restorers use a wide variety of materials - in conservation treatments, and those used to safely transport, display and store cultural heritage items. These materials can include solvents, papers and boards, fabrics, adhesives and consolidants, plastics and foams, wood products, and many others.
The final product is a fine powder of 50 mesh size. Unlike Portland cement, Rosendale cement does not require mixing of chemical additives. Historically, this natural cement product was packaged in paper-lined wooden barrels weighing 300 lbs, or in heavy canvas bags. [9]
Roman concrete, also called opus caementicium, was used in construction in ancient Rome. Like its modern equivalent , Roman concrete was based on a hydraulic-setting cement added to an aggregate . Many buildings and structures still standing today, such as bridges, reservoirs and aqueducts, were built with this material, which attests to both ...