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7572330 |
Fresh concrete and admixture for fresh concrete
The invention relates to the composition of fresh concrete and admixtures for fresh concrete and can be used in the construction industry for producing monolithic and precast concrete and...
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7507281 |
Antimicrobial cementitious composition, method and article
An antimicrobial cementitious composition for imparting antimicrobial characteristics to cement comprises a cement-based compound and an imazalil agent; combinations of agents also may be employed.
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7293941 |
Methods for cementing using compositions containing salts
Disulfonate salts of 2,4-pentanedione and methods for making such salts are described. The disulfonate salts are useful as cement dispersants. Cement compositions including such salts, methods for...
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7285166 |
Zeolite-containing cement composition
Methods and cement compositions are provided for sealing a subterranean zone penetrated by a wellbore, wherein the cement composition comprises zeolite, cementitious material, and a mixing fluid.
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7261771 |
Method of controlling the viscosity of a cementitious mixture using oppositely-charged polyelectrolytes
A process for increasing the viscosity of an aqueous cementitious mixture during its working state by mixing oppositely-charge polyelectrolytes into the cementitious mixture.
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7258738 |
Cementing compositions including salts
Disulfonate salts of 2,4-pentanedione and methods for making such salts are described. The disulfonate salts are useful as cement dispersants. Cement compositions including such salts, methods for...
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7255731 |
Use of particular polysaccharides as admixtures for mineral materials
The subject of the present invention is the use of particular polysaccharides as admixtures for mineral materials, especially as admixtures for mineral binders. These polysaccharides have,...
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7232873 |
Polycarboxylic acid cement dispersant and method for producing concrete secondary product
A polycarboxylic acid cement dispersant that can exhibit high dispersing ability and allow deforming in early stages in the case of producing concrete products, whereby the turnover of a formwork...
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7223443 |
Antimicrobial cementitious composition
An antimicrobial cementitious composition for imparting antimicrobial characteristics to cement comprises cement and an antimicrobial agent selected from the group consisting of an ortho-phenyl...
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7147706 |
Cementitious compositions and methods of making cementitious compositions
Cementitious compositions having high compressive strength and high flexibility. An efficient method of making such strong cementitious compositions entails pre-mixing cement additives that can...
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7128781 |
Cementitious compositions and methods of making cementitious compositions
Cementitious compositions having high compressive strength and high flexibility. An efficient method of making such strong cementitious compositions entails pre-mixing cement additives that can...
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7052543 |
Permeable cement composition and method for preparing the same
The current invention provides an improved permeable cement composition for formation of downhole sand screens. The improved composition includes an effective amount of a surfactant. Addition of...
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6989057 |
Zeolite-containing cement composition
A method and cement composition is provided for sealing a subterranean zone penetrated by a well bore, wherein the cement composition comprises zeolite, cementitious material, and water sufficient...
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6982000 |
Cement compositions including silane treated amorphous silica
The present invention provides improved cement compositions comprising hydraulic cement, silica hydrophobicized with a mixture of organosilicon compounds and water.
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6916369 |
Beneficiated water reducing compositions
Exemplary compositions comprise at least one aldopentonic acid, such as xylonic acid; and further comprise a lignin, a lignosulfonic acid or its salt, an additional sugar acid such as a aldohexonic...
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6899177 |
Methods of cementing subterranean zones with cement compositions having enhanced compressive strengths
Methods of cementing subterranean zones penetrated by well bores using cement compositions having enhanced compressive strengths are provided. A method of the invention basically comprises the...
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6863837 |
Dispersant composition
The present invention provides a sulfonated coal tar distillate salt polymer that is a condensation product of an aldehyde, preferably formaldehyde, and a sulfonated middle fraction obtained during...
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6858074 |
High early-strength cementitious composition
A high early-strength cementitious composition comprising a hydraulic cement; and a combination admixture system wherein the combination admixture system comprises a polycarboxylate high range...
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6855201 |
Cementing compositions
A cement composition is basically comprised of a hydraulic cement, water in an amount sufficient to form a pumpable slurry and a fluid loss control polymer additive comprised of 69 weight % of the...
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6843846 |
Methods and compositions for cementing subterranean zones
Methods and compositions for cementing subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of providing a cement composition which comprises a...
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6840319 |
Methods, compositions and biodegradable fluid loss control additives for cementing subterranean zones
Methods, compositions and fluid loss control additives for cementing in subterranean zones are disclosed. A composition comprises a hydraulic cement, sufficient water to from a slurry and a water...
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6835243 |
Cementing in deep water offshore wells
An improved method of cementing casing in a deep water offshore formation penetrated by a well bore comprising the steps of preparing a foamed cement composition comprised of calcium aluminate...
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6824605 |
Additive for the preparation of ecological permeable concretes with high compression, bending and abrasion resistance, and production process
An additive for elaboration of ecological permeable concretes. The additive containing from about 24.5% to 28.2% by weight of a mixture made of dispersing agents, from about 3.3% to 3.8% by weight...
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6793730 |
Methods of cementing
The present invention provides improved methods for cementing. The methods are basically comprised of the steps of preparing a cement composition comprised of hydraulic cement, water, gas,...
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6709508 |
Dry mortar formulations modified with water-redispersible polymer powders
Dry mortar formulations comprising a) from 0.5 to 80% by weight of hydraulic binder, b) from 0 to 97% by weight of fillers, c) from 0 to 3.5% by weight of thickeners, d) from 1.0 to 80% by weight...
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6656266 |
Cementing composition and application thereof to cementing oil wells or the like
Cementing compositions which are particularly suitable for squeeze cementing operations, comprise an aqueous phase, and a micro-cement, the aqueous phase including an aqueous suspension comprising...
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6641660 |
Stable well cementing methods and compositions
The present invention provides stable well cementing methods and compositions for sealing subterranean zones penetrated by well bores. The improved thermally stable and degradation resistant well...
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6630021 |
Cementing casing strings in deep water offshore wells
The present invention provides improved compositions and methods for cementing casing strings in deep water offshore formations penetrated by well bores. The cement composition basically comprises...
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6630020 |
Cement additive, and concrete composition and structure both containing the same
A cement additive composition for preventing discoloration of the surface of concrete, comprising a cement additive (a) and a water-reducing admixture (b), the additive (a) comprising a mixture of...
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6616753 |
Methods and compositions for sealing subterranean zones
Methods and compositions for sealing subterranean zones penetrated by well bores are provided. The methods basically comprise the steps of introducing a sealing composition into the subterranean...
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6565645 |
Water-resistant hydraulically setting compositions
A hydraulic setting composition is provided. The composition when set has improved water absorption properties. The composition contains a hydraulically setting inorganic material such as calcium...
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6558461 |
Set retarders for foamed cements
An improved non-dispersing set retarder additive for foamed cements, cement compositions containing the additive, and methods of cementing in a subterranean zone penetrated by a well bore are...
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6457524 |
Well cementing compositions and methods
The present invention provides improved lightweight well cement compositions useful for performing a variety of cementing applications in subterranean formations and particularly for cementing...
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6391106 |
Cementitious mixture containing high pozzolan cement replacement and compatabilizing admixtures therefor
A cementitious mixture comprises a hydraulic cement; greater than about 10% by weight of a pozzolanic cement replacement selected from fly ash, slag, natural pozzolans, and mixtures thereof, based...
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6387176 |
Multipurpose cement dispersing polymers for high flow and high strength concrete
A new category of multi-purpose polymers is presented, the polymers being capable to serve as a cement dispersing agent and which at the same time are set-accelerating and do have shrinkage...
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6358310 |
Air entraining admixture compositions
Additive for cementitious compositions, comprising: at least one admixture, such a shrinkage reducing admixture, an air entraining admixture, a water reducing admixture, an inorganic salt, a...
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6358311 |
Additives for cement materials and cement materials
New alkanolamine additives for improving the compressive strength, etc. of set cementitious compositions such as Portland cement concrete are described as having at least one alkanolamine or the...
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6342101 |
Migrating corrosion inhibitors combined with concrete and modifers
A formulation for blending with raw concrete to form an admixture wherein a concrete plasticizer and migrating corrosion inhibitors are blended with concrete prior to pour. The plasticizer enhances...
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6309455 |
Stable suspension of hydrocolloids and superplasticizer
The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated...
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6309457 |
Cement-Based Self-Leveling Composition
The present invention relates to a self-leveling composition for floor toppings, characterized in that it is based on Portland cement or on cement mix CM II or CM III, and in that it further...
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6296698 |
Cement admixture and cement composition
A cement admixture that includes a copolymer obtained by polymerizing (A) 10 to 85% by weight of N-vinylacetamide or a monomer derived therefrom, (B) 10 to 90% by weight of an (alkoxy)polyethylene...
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6277191 |
Air entrainment with polyoxyalkylene copolymers for concrete treated with oxyalkylene SRA
The present invention relates to a method and air entraining admixtures (AEAs) for achieving satisfactory levels of air entrainment in a hydraulic cementitious composition, such as concrete or...
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6270565 |
Methods and compositions for cementing pipe in well bores
Methods and compositions for cementing pipe strings in well bores are provided. The compositions are basically comprised of a hydraulic cement, water, an in situ foam generating additive and a...
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6258161 |
Masonry blocks and masonry concrete admixture for improved freeze-thaw durability
A masonry concrete, for use in making segmental retaining wall units, pavers, blocks, and the like, having zero slump and incorporating betaine for improving freeze-thaw durability, and optionally...
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6251179 |
Thermally conductive cementitious grout for geothermal heat pump systems
A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The...
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6241815 |
Gypsum-cement system for construction materials
A composition for use in construction materials, which may be substituted for high performance concrete, patching materials, joint compounds, and the like, such as backer boards or panels, which...
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6238474 |
Quick-setting, hydraulic binding agent
The present invention concerns a quick-setting, hydraulic binding agent, containing calcium silicate cement, in particular Portland cement, reactive calcium aluminates, in particular high alumina...
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6238475 |
Ammoxidized lignosulfonate cement dispersant
A modification to lignosulfonate is disclosed, the effect of which is to reduce the set retarding and air entraining properties normally experienced when using lignosulfonates as water reducing...
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6227294 |
Methods of cementing subterranean zones
Improved methods of cementing in a subterranean zone penetrated by a well bore are provided. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of...
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6228962 |
Methods of using cement dispersants for producing concrete
Cement dispersants which contain two specified kinds of water-soluble vinyl copolymers mixed at a specified ratio can produce cement compositions such as concrete with water/cement ratio of 20-40...
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