The present invention is the production method of ready injection material which aims to develop natural hydraulic lime in nano size by using a single raw material.

The present invention is the production method of ready injection material which aims to develop natural hydraulic lime in nano size by using a single raw material.

A method for producing a hardened product of a hydraulic composition, includes mixing water, a hydraulic powder, a dispersant composition, and an aggregate to prepare a hydraulic composition, filling the hydraulic composition into a mold, and steam curing, in the mold, the hydraulic composition filled into the mold. The dispersant composition includes (A) a formaldehyde naphthaienesulfonate condensate or a salt thereof, (B) a compound having an alkylenoxy group, and optionally (C) a polycarboxylic acid-based copolymer, in particular proportions.

The invention relates to a composition in the form of a solid and suitable as a dispersant for inorganic solids suspensions, comprising A) at least one water-soluble polymer comprising polyether groups, and B) at least one water-soluble condensation product comprising acid groups and/or salts thereof and based on monomers, the monomers comprising at least ) a monomer having a ketone radical and ) formaldehyde. Further disclosed are a method for producing the composition of the invention, and the use thereof in an inorganic binder composition.

The invention relates to a composition in the form of a solid and suitable as a dispersant for inorganic solids suspensions, comprising A) at least one water-soluble polymer comprising polyether groups, and B) at least one water-soluble condensation product comprising acid groups and/or salts thereof and based on monomers, the monomers comprising at least ) a monomer having a ketone radical and ) formaldehyde. Further disclosed are a method for producing the composition of the invention, and the use thereof in an inorganic binder composition.

The present disclosure relates to a method of cementing comprising: providing a cement composition comprising: water, a cement, and a non-aqueous liquid anti-shrinkage cement additive comprising calcined magnesium oxide and a non-aqueous liquid; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Non-aqueous liquid anti-shrinkage cement additives, cement compositions, and systems are also provided.

The present disclosure relates to a method of cementing comprising: providing a cement composition comprising: water, a cement, and a non-aqueous liquid anti-shrinkage cement additive comprising calcined magnesium oxide and a non-aqueous liquid; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Non-aqueous liquid anti-shrinkage cement additives, cement compositions, and systems are also provided.

A modified gypsum set accelerator and a method of preparing the same is provided, which includes dry loose finely ground particles of a mixture of ground dry calcium sulfate dihydrate and a grinding aid selected from one or more of beta-naphthalene sulfonate formaldehyde condensate, trimetaphosphate phosphate salt, tripolyphosphate salt, tetra-pyrophosphate salt, and pregelatinized starch.

The present invention relates to construction chemical compositions comprising a bisulfite adduct of glyoxylic acid or a salt or mixed salt thereof and an inorganic binder. The composition is useful as a hydration control agent of the inorganic binder.

The present invention relates to construction chemical compositions comprising a bisulfite adduct of glyoxylic acid or a salt or mixed salt thereof and an inorganic binder. The composition is useful as a hydration control agent of the inorganic binder.