摘要:
Method for grinding a solid in a vertical roller mill (VRM) and a cement composition prepared by the disclosed methods. A method comprises grinding a solid comprising a cement clinker under a water spray in the presence of a grinding stabilizing additive, wherein the grinding stabilizing additive comprises: (i) an alkanol amino acid compound or a disodium or dipotassium salt thereof having the structural formula: (I), (ii) a glycol; or a mixture of (i) and (ii), wherein the water spray level is reduced by at least 5% compared to a control. Cement compositions prepared by the disclosed methods have the pre-hydration level (W k ) equal to or less than 1.5%. The values and preferred values of R 1-3 are disclosed herein.
摘要:
The present invention provides a composition and method for controlling air voids in aqueous systems such as paints, coatings, sealants, adhesives, mastics, cements, mortar, masonry, or concrete, which comprises the reaction product of an oxidizing agent and a compound comprising at least one polyalkoxylated polyalkylene polyamine, at least one polyalkyoxylated polyethyleneimine, or a mixture thereof.
摘要:
A method of colouring cementitious building materials such as concrete is disclosed. The method uses flowable, spray-dried, particulate formulations of inorganic pigments prepared using a selection of formulants that do not substantially effect primary ettringite formation. Quantities of the formulations may conveniently be dispensed into a slurry of cement and water by gravimetric or volumetric means.
摘要:
Disclosed herein are cement compositions and methods of using cement compositions in subterranean formations. An embodiment discloses a method of formulating a cement composition. The method may comprise measuring surface area of a group of pozzolans, wherein the smallest measured surface area of the group of pozzolans and the largest measured surface area of the group of pozzolans vary by about 50% or greater. The method may further comprise selecting one or more pozzolans from the group of pozzolans. The method may further comprise adding components comprising lime and water to the selected one or more pozzolans to form a cement composition.
摘要:
The present invention relates to a composition having a gel strength of from 1.0 μΝ to 10.0 N, a method of preparing a composition having a gel strength of from 1.0 μΝ to 10.0 N, a method of hydraulically fracturing of a subterranean formation, preferably an oil well or gas well, a hydraulically fracturing fluid as well as the use of said composition for hydraulic fracturing of a subterranean formation. The present invention further relates to the gel and use of this gel in pharmaceutical applications, cosmetic applications, constructing applications, paper applications, paint applications, plastic applications, food applications and/or agricultural applications.
摘要:
Methods and compositions for cementing are disclosed. Embodiments include a method of cementing comprising: providing a set-delayed cement composition comprising water, pumice, hydrated lime, a primary set retarder, a secondary set retarder; activating the set-delayed cement composition to produce an activated cement composition; introducing the activated cement composition into a subterranean formation; and allowing the activated cement composition to set in the subterranean formation.
摘要:
A variety of methods and compositions are disclosed, including, in one embodiment a method comprises providing a set-delayed cement composition comprising: a hydraulic cement, water, and a primary retarder; activating the set-delayed cement composition through a retarder exchange whereby a secondary retarder is added to the set-delayed cement composition to produce an activated cement composition; and allowing the activated cement composition to set.
摘要:
Hydrophilic, self-cleaning coating compositions and methods to make and use the compositions are disclosed. The coatings comprise perlite and/or expanded perlite that are activated with hydrophilic agents. The perlites when incorporated in paints provide hydrophilic, self-cleaning and/or biocidal property to the coating.