concrete is the most common artificial composite material of all and typically consists of loose stones aggregate held with a matrix of cement. concrete is an inexpensive material, and will not compress or shatter even under quite a large compressive force.
the productivity-improving technologies are the technological innovations that have historically increased productivity.. productivity is often measured as the ratio of aggregate output to aggregate input in the production of goods and services. productivity is increased by lowering the amount of labor, capital, energy or materials that go into producing any given amount of economic goods .
sodium hypochlorite solutions have been used to treat dilute cyanide waste water, such as electroplating wastes. in batch treatment operations, sodium hypochlorite has been used to treat more concentrated cyanide wastes, such as silver cyanide plating solutions. toxic cyanide is oxidized to cyanate ocn − that is not toxic, idealized as follows:
the petronas towers, also known as the petronas twin towers malay: menara petronas, or menara berkembar petronas , are twin skyscrapers in kuala lumpur, malaysia.according to the council on tall buildings and urban habitat 's official definition and ranking, they were the tallest buildings in the world from 1998 to 2004, until they were surpassed by taipei 101.
the concrete raft foundation, comprising 13,200 cubic metres 470,000 cu ft of concrete was continuously poured through a period of 54 hours for each tower. the raft is 4.6 metres 15 ft thick, weighs 32,500 tonnes 35,800 tons and held the world record for the largest concrete pour until 2007. 17