Alkali activated binding agent based on hydraulically active substances

摘要

The invented alkali activated binding agent based on latently hydraulically active substances and intended for producing slurries, mortars and concretes setting at a temperature ranging from 15 to 95 degC is characterized in that it consists of 35 to 93 percent by weight of power-station pulverized flue ash having specific surface 100 to 600 me2/kg, 2 to 50 percent by weight of inorganic active substance being selected from the group comprising ground granulated blast furnace slag having specific surface within the range of about 200 to 600 me2/kg, and/or ground Portland cement clinker having specific surface within the range of about 200 to 600 me2/kg, and/or natural and/or artificial puzzolan and/or heat activated natural clay, and 5 to 15 percent by weight of an alkali activating reagent such as a mixture of sodium or potassium water glass and NaOH or KOH, expressed as weight percentages of Nai2O or Ki2O, in which the ratio of SiOi2/Nai2O or Ki2O = 0.4 to 1.0 and it optionally further contains up to 10 percent by weight of a mixed Portland cement, such as slag Portland cement or blast furnace cement.