Abstract:
A cement retarder composition, method, kit and system are herein disclosed. Seeds are added to cement to delay the setting of cement. Cement retarders are added to cement to delay the setting of the cement until it is pumped to the desired position.
Abstract:
Additives for use in treatment operations, and more particularly, additives that include chlorinated carbohydrates, are provided. An example of an additive is a well fluid additive for use in a subterranean formation that includes a chlorinated carbohydrate. Another example of an additive is a well fluid additive for use in a subterranean formation that includes a chlorinated carbohydrate and a tartaric acid. The invention also relates to treatment fluid compositions comprising chlorinated hydrocarbons. The invention further relates to methods of treating subterranean formations using treatment fluid compositions comprising chlorinated carbohydrates.
Abstract:
The present invention relates to a method of retarding the setting of alkali activated binders by adding a boron compound and at least one of acetic acid or an acetate as a retarder, a retarder for alkali activated binders that comprise an alumino-silicate source and an activator, wherein the retarder contains a boron compound and at least one of acetic acid or an acetate, and to the use of the binder retarded accordingly or containing such a retarder for manufacturing precast products or ready mix concrete.
Abstract:
A method of controlling the setting time of a geopolymer by coating aluminosilicate particles with nanoparticles to slow the geopolymerization reaction. The coating effectiveness of the nanoparticles may be enhanced by pretreating the aluminosilicate particles with a layer-by-layer assembly of polyelectrolytes. A geopolymer is formed by mixing about 39% to about 66% by weight aluminosilicate source, about 0% to about 40% by weight sand, about 19% to about 33% by weight of alkali activator solution, and about 1% to about 4% nanoparticles.
Abstract:
La présente invention se rapporte à un procédé de de transport d'une composition hydraulique à l'état frais comprenant: -de 220 à 500kg, par mètre cube de la composition hydraulique à l'état frais, d'un liant hydraulique comprenant du ciment Portland; -de 400 à 1200kg, par mètre cube de la composition hydraulique à l'état frais, d'un sable; -de 150 à 1000kg, par mètre cube de la composition hydraulique à l'état frais, d'un gravier; -de 0,05 à 5% en masse d'extrait sec par rapport à la masse du liant hydraulique d'un superplastifiant; et -de 0,01 à 0,5% en masse d'extrait sec par rapport à la masse du liant hydraulique d'un agent modificateur de rhéologie, le transport étant réalisé pendant plus de dix minutes sans agitation de la composition hydraulique.
Abstract:
The invention relates to the use of acrylic acid and poly(oxy)alkylene copolymers for obtaining an adjuvant useful as a fluidiser and/or blocking agent for calcium sulphate-based hydraulic binders.
Abstract:
L'invention se rapporte à l'utilisation d'un thiosulfate comme retardateur de prise d'une pâte cimentaire comprenant un ciment phosphomagnésien. Applications : génie civil.
Abstract:
Methods of cementing include providing a geopolymer cement composition that includes a monophase amorphous hydraulic binder material (MAHBM), a metal silicate, an alkaline activator, and a carrier fluid, introducing the geopolymer cement composition into a subterranean formation, and allowing the geopolymer cement composition to set in the subterranean formation. The MAHBM includes silica or alumina core particulates coated with an amorphous calcium silicate hydrate.