Abstract:
The present invention relates to a supplementary cementitious material, a method for producing the supplementary cementitious material, the use of the supplementary cementitious material, a binder comprising the supplementary cementitious material, a method for the preparation of the binder and use of the binder to make hydraulic building materials like concrete.
Abstract:
The present disclosure provides methods, compositions, and systems embodying cement compositions and the synergistic effect of lost circulation materials (LCMs) and fluid loss control additives (FLCAs) thereupon for cementing subterranean zones. A method of subterranean well cementing, comprising providing a cement composition comprising a hydraulic cement, a first FLCA, an LCM, and water, wherein the first FLCA comprises a water-soluble polymer with repeating units comprising a 5- to 6-membered cyclic amide; introducing the cement composition into a wellbore penetrating a subterranean formation, wherein inclusion of the first FLCA and the LCM in the cement composition fluid reduces fluid loss into the subterranean formation, wherein the subterranean formation has fractures with a width of from about 1 micron to about 800 microns, and wherein the subterranean formation has a permeability of about 1milliDarcy to about 300 Darcy; and allowing the cement composition to set in the subterranean formation.
Abstract:
Cement slurries are prepared that comprise water, a hydraulic cement, particles of an oil-absorbent particles and non-swellable hydrophobic particles. The particles are present in an amount sufficient to alter a property of a non-aqueous drilling fluid. The cement slurry is placed in a subterranean well, whereupon the slurry contacts residual drilling fluid on casing and formation surfaces. The oil-absorbent particles and hydrophobic particles in the cement slurry may reduce the mobility of the drilling fluid, thereby improving zonal isolation.
Abstract:
L'invention concerne un copolymère obtenu par une réaction de polymérisation mettant en œuvre un monomère anionique et deux monomères polyéthoxylés. L'invention concerne également une composition comprenant ce copolymère ainsi qu'un procédé pour sa préparation et son utilisation comme agent superplastifiant d'une composition de liant hydraulique.
Abstract:
본 발명은 콘크리트의 내부에서 균열이 발생했을 때 우레아 분해성 미생물에 의해 다량의 탄산칼슘이 생성되어 균열 부위를 자기치유할 수 있는 콘크리트 자기치유 마이크로 캡슐 및 그 제조 방법, 그 마이크로캡슐을 포함한 콘크리트 조성물에 관한 것으로, 본 발명에 따른 콘크리트 자기치유 마이크로 캡슐은, 우레아(urea)를 분해하여 탄산이온(CO 3 2- )을 생성하는 우레아 분해성 미생물과 우레아를 분해하지 않는 우레아 비분해성 미생물을 공배양하여 형성된 스포어(spore)를 포함하는 코어와, 상기 코어를 둘러싸는 쉘을 포함할 수 있다.
Abstract:
A batch composition containing pre-reacted inorganic spheroidal particles and pore- former spheroidal particles. The pre-reacted inorganic spheroidal particles have a particle size distribution wherein 10 µm ≤ DI 50 50 ≤ DI 50 50 , and DPb ≤ 1.32, wherein DI50 is a median particle diameter of the distribution of pre-reacted inorganic spheroidal particles, DP 50 is a median particle diameter of the pore-former particle size distribution, DIb is a breadth factor of the pre-reacted particle size distribution of the pre- reacted inorganic spheroidal particles, and DPb is a breadth factor of the pore-former particle size distribution. Also, green honeycomb bodies manufactured from the batch compositions, and methods of manufacturing a honeycomb body using the batch compositions, are provided.
Abstract:
Compositions comprising crosslinked polysaccharides, particularly levan and/or dextran, may provide advantageous benefits when admixed with concrete blends. Suitable compositions may comprise a biologically sourced surfactant, and a crosslinked polysaccharide, in which the crosslinked polysaccharide comprises at least one crosslinking group bonded via ether linkages to a first polysaccharide chain and a second polysaccharide chain. Concrete blends may comprise such compositions, a cement and water. Methods for forming and/or using the concrete blends may comprise allowing the concrete blends to form a hardened mass.
Abstract:
The present invention relates to a water-redispersible polymer powder comprising a water-insoluble polymer and a triester, wherein the triester is a triester of glycerol with a C 1 -to C 5 -carboxylic acid and/or a triester of a C 1 -to C 5 -alcohol with a tricarboxylic acid. Furthermore, processes to make said water- redispersible polymer powder are disclosed. One process comprises the making of a powder i) comprising the triester and a water-soluble polymer, wherein the powder i) is mixed with a polymer powder PP comprising a water- insoluble polymer. The intermediate powder i) is claimed as well. The polymer powder of the invention can be used in powder adhesives, wallpaper adhesives or dry mortars.