News Date:2016-02-23 09:21:07
1.What is slag cement (ground granulated blast furnace slag)?
Slag cement (also called ground granulated blast furnace slag) is a hydraulic cement produced during the reduction of iron ore to iron in a blast furnace. Molten slag is tapped from a blast furnace, rapidly quenched with water ("granulated"), dried and ground to a fine powder. The rapid quenching "freezes" the molten slag in a glassy state, which gives the product its cementitious properties.
2.How do I find a slag cement making equipment’s supplier?
Xinxiang Great Wall Machinery Corporation was built in 1958, up to now, Great Wall Machinery has constructed more than 100 slag grinding production lines at home and abroad. Great Wall Machinery can undertake 20 tons --1.5 million tons of Blast furnace slag/Steel slag/Nickel slag/Manganese slag powder production EPC projects. Click here to know the details. These cases will be able to let you know about the strength of Great Wall in your area.
3.What is the history of slag cement?
Slag cement use can be traced to the 1700’s when the material was combined with lime to make mortars. The first United States production was in 1896. Until the 1950’s, granulated slag was used in the manufacture of blended portland cements, or as raw feedstock to make cement clinker. However, in the 1950’s, slag cement became available in other countries as a separate product. The first granulation facility in the U.S. to make a separate slag cement product was Sparrows Point, Maryland, in the early 1980’s. Recent years have seen the supply and acceptance of slag cement grow dramatically throughout the U.S.
4.What is slag cement used for?
Slag cement is most widely used in concrete, either as a separate cementitious component or as part of a blended cement. It works synergistically with portland cement to increase strength, reduce permeability, improve resistance to chemical attack and inhibit rebar corrosion. Slag cement is used in virtually all concrete applications:
Concrete pavements
Structures and foundations
Mass concrete applications, such as dams or retaining walls
Precast and prestressed concrete
Pipe and Block
Concrete exposed to harsh environments, such as wastewater treatment and marine applications
High-performance/high-strength concrete, such as high-rise structures or 100-year service life bridges
Slag cement is also used in non-concrete applications such as soil-cement and hazardous waste solidification.
5.Does slag cement change the hardened properties of concrete?
Slag cement improves many of the strength and durability properties of hardened concrete. Slag cement is a hydraulic binder that, like portland cement, reacts with water to form cementitious material (calcium-silicate hydrate or CSH). It also, similar to a pozzolan, consumes by-product calcium hydroxide from the hydration of portland cement to form additional CSH. The resulting cement paste is stronger and denser, thus improving the concrete.
