Additional requirements placed on hydroanhydrite as a cement setting time regulator

The article cites the results of the works on using gypsum-anhydrite-type rock as cement setting time regulators, the anhydrite differing by the presence of changing, within wide limits, water-soluble and insoluble forms of calcium sulphate. For an additional controllable parameter, one should accept the content of water-soluble sulphur oxide, whose mass fraction should be not less than 32 abs. %.

Author: A.M. Dmitriev, I.E. Kovaleva, A.V. Shutova, V.P. Ryazin, N.S. Panina.

Section: Science and production

Keywords: regulator, setting time, cement composition