WATER cement composition comprises particles that are activated to control rheology, water-soluble portion WHEN particles are released in the presence of water

摘要

1. A method for producing an aqueous cementitious composition comprising the following steps: (a) preparation of particles with a release into the water, said particles with separation into water containing at least one water-soluble polymer in such a way that its particles are separated in the presence of water releasing vodozaguschayuschie, water-soluble portion of the particles, wherein said active portion comprise at least one water soluble polymer; and (b) isolation of the inclusion particles in water in an aqueous cementitious composition comprising these particles, the inorganic curable cement in water, a dispersant and an aqueous liquid nositel.2. A method according to Claim. 1, wherein the particles contain the water release reversible gel matrix derived at least partially from at least one water-soluble polimera.3. A method according to claim. 2, wherein the gel matrix comprises a polymeric testo.4. A method according to Claim. 1, wherein the particles comprise a water release in a reversible manner agglomerated particles of water-soluble polimera.5. A method according to Claim. 1, wherein the release rate is a function of the water-soluble parts of water-soluble chastits.6 size. A method according to Claim. 1, wherein the particles release in water is obtained from the first set of particles having a first particle size distribution, and a second set of particles having a second particle distribution razmeru.7. A method according to claim. 6, wherein at least 80% of the particles in the first population have a particle length (LOP) (50,3) in the range from 600 micrometers to 850 mikrometrov.8. A method according to Claim. 1, wherein step (a) comprises blending a powder of at least one water-soluble polymer and a liquid to form a compounded mass and grinding