Abstract: A flow splitter can include an inlet conduit and first and second outlet conduits separated by a junction portion. The inlet conduit can include an inlet end and a junction end. The inlet conduit is disposed along a main flow axis extending between the inlet end and the junction end. The inlet end defines an inlet opening. The junction end defines first and second junction openings. The first junction opening is disposed in spaced relationship to the second junction opening. The junction portion is disposed at the junction end of the inlet conduit between the first and second junction openings. The junction portion includes a substantially planar wall region that is substantially perpendicular to the main flow axis. The flow splitter can be placed in fluid communication with a cementitious slurry mixer and a slurry distributor with the flow splitter disposed therebetween.

Abstract: Exemplary embodiments provide materials and methods for forming CNTs-polymer composites (e.g., CNTs-SBR latex nano-composites and/or CNTs-epoxy nano-composites), CNTs-polymer concrete, and CNTs-polymer modified cementitious composites. In one embodiment, a plurality of CNTs and a surfactant-containing polymer, including a surfactant attached to a polymer chain, can be dispersed within a cementitious matrix to form a CNTs-polymer modified cementitious composite with the surfactant non-covalently bonded to one or more CNTs.

Abstract: Methods and compositions for producing flowable compositions, e.g. pastes, that set into calcium phosphate products are provided. In the subject methods, dry reactants that include a calcium source and a phosphate source are combined with a setting fluid to produce the flowable composition. A feature of the subject methods is that the dry reactants include a particulate calcium and/or phosphate reactant having a mean particle size of less than about 8 ?m and narrow size distribution. Also provided are the compositions themselves as well as kits for use in practicing the subject methods. The subject methods and compositions produced thereby find use in a variety of applications, including the repair of hard tissue defects, e.g., bone defects.

Abstract: A ceramic honeycomb structure comprised of at least two separate smaller ceramic honeycombs that have been adhered together by a cement comprised of inorganic fibers and a binding phase wherein the smaller honeycombs and fibers are bonded together by the binding phase which is comprised of an amorphous silicate, aluminate or alumino-silicate glass and the cement has at most about 5% by volume of other inorganic particles. The cement may be made in the absence of other inorganic and organic additives while achieving a shear thinning cement, for example, by mixing oppositely charged inorganic binders in water together so as to make a useful cement for applying to the smaller honeycombs to be cemented.

Abstract: A housing may include a test cell being enclosed and having at least one test cell wall and one sealable opening and has a cell central axis defined along the center line of the length of the test cell, a thermal element in thermal communication with the test cell, and an insulation, at least a portion of the insulation being disposed about the test cell and the thermal element. An apparatus may generally include a housing, a drive connection, and a shaft operably connected to the test cell and extending parallel to the cell central axis from the test cell through the insulation to the drive connection to which the shaft is operably connected. Testing a sample in the test cell of an apparatus operably connected to a driving mechanism may generally include at least manipulating the test cell and analyzing the sample.

Abstract: A variety of methods and compositions are disclosed, including, in one embodiment, a method of treating a well comprising: providing a treatment fluid comprising a base fluid and a blended cementitious component, wherein the blended cementitious component comprises kiln dust from two or more different sources; and introducing the treatment fluid into a well bore.

Abstract: A wearing compound slurry comprising an inorganic binder, ceramic particles, ceramic powder, diluent and optionally filler and discontinuous fibers. The slurry is applied to a wearable surface and exposed to heat to remove diluent and cure the wearing compound into a hard layer. The cured wearing compound layer remains intact after exposure to extremely high temperatures.

Abstract: A composition that may be used to retain moisture within fresh concrete as it cures to optimize the curing of the concrete may include one or more hardening and densifying agents and one or more temporary moisture sealing agents. Additionally such a composition may include a siliconate. The hardening and densifying agent of such a composition may penetrate the surface of fresh concrete to react with free lime, providing the fresh concrete with a strong surface. The temporary moisture sealing agent may form a moisture barrier on the surface of the fresh concrete to prevent moisture from escaping from the fresh concrete before the fresh concrete has sufficiently cured. The temporary moisture sealing agent may degrade within a matter of days, facilitating its removal from the surface of the concrete once the concrete has cured and enabling further treatment of the surface without undue delay.

Abstract: Provided herein are methods and systems to produce a bicarbonate solution from one or more of natural substances and to contact the bicarbonate solution with cathode electrolyte in an electrochemical system to produce a product containing carbonate or combination of carbonate and bicarbonate.

Abstract: A process for making concrete which is stabilized against alkali-silica reactivity (ASR) is provided. The process includes incorporating into the concrete mixture a concrete admixture mixture comprising water, first lithium-containing materials in an amount sufficient to control ASR, and second lithium-containing materials in an amount sufficient for controlling set time, and optionally mineral admixtures and other chemical admixtures for property enhancements exclusive of ASR mitigation and/or set time control, to form the concrete. An admixture for stabilizing concrete against ASR is also provided.

Abstract: Methods and compositions are disclosed that comprise cement kiln dust having a mean particle size that has been altered. An embodiment discloses a method of preparing cement kiln dust comprising: providing cement kiln dust having an original particle size; and altering the mean particle size of the cement kiln dust from the original size by grinding, separating, or a combination thereof. Another embodiment discloses a well treatment fluid comprising: cement kiln dust having a mean particle size that has been altered from its original size by grinding, separating, or a combination thereof; and water.

Abstract: A pourable aqueous cement composition is disclosed. The cement composition comprises a hydraulic cement, water and a selectively removable material comprising a plurality of selectively corrodible metal powder particles dispersed within the cement or a nanomatrix powder compact, or a combination thereof. An article, including a downhole article, and more particularly a reconfigurable downhole article is disclosed. The article includes a hydraulic cement, wherein the hydraulic cement has at least partially set into a permanent form. The article also includes a selectively removable material dispersed within the cement, the selectively removable material comprising a plurality of selectively corrodible metal powder particles dispersed within the cement or a nanomatrix powder compact, or a combination thereof, wherein the selectively removable material is configured for removal in response to a predetermined wellbore condition.

Abstract: It is the object of the invention to provide a cement admixture, and a cement composition that can impart good enough rustproofness to reinforcing bars in hardened cement concrete, and can have resistance to penetration of chloride ions entering from the outside, prevent the hardened cement concrete from getting porous due to reduced leaching of Ca ions and have a self-recovery capability. The invention provides a cement admixture characterized by containing a calcium ferroaluminate compound comprising a CaO—Al2O3—Fe2O3 system, and having a Fe2O3 content of 0.5 to 15% by mass and a CaO.2Al2O3 structure with a CaO/Al2O3 molar ratio ranging from 0.15 to 0.7.

Abstract: The invention provides a cementing composition for use in oilfield application, wherein a significant amount of cement is left intentionally un-hydrated when the cement is set; such that said amount of un-hydrated cement becomes hydrated when the set cement is damaged.

Abstract: Method for the application of sprayed concrete by using a 3-way control nozzle as mixing device for ready mix concrete, liquid admixtures and compressed air, characterized in, that the liquid admixtures and/or the conveying air are heated prior and/or during to the spraying.

Abstract: In the invention, a hydraulic powder is prepared by a step of grinding a hydraulic compound in the presence of compound (a) that is obtained by adding an alkyleneoxide having 2 to 4 carbon atoms to a compound which has no amino group, but has an active hydrogen, provided that polyethyleneglycol and polypropyleneglycol are excluded. Alternatively, the hydraulic compound can be ground in the presence of compound (a) and anti-foaming agent (b).

Abstract: A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour (for example a flue gas or a cement plant flue gas) which process includes contacting the gas with a particulate solid, which solid includes an alkaline earth metal oxide or hydroxide and a promoter selected from an alkanolamine; an unsubstituted or substituted piperazine; an unsubstituted or substituted morpholine; and a polyethyleneamine oligomer.

Abstract: A low-pressure method for producing construction materials, such as blocks, bricks or slabs, utilizing high percentages of waste cement dust in admixture with additive material capable of effectively neutralizing the high lime content and agglomerating the extremely fine particles of the cement dust upon blending of the admixture with water. The resulting blend may simply be cast in molds of various shapes and sizes and cured under normal atmospheric pressure conditions into a hardened construction material exhibiting high strength, light weight and high thermal insulation.

Abstract: The present disclosure relates to geothermal grout, methods of making geothermal grout, and methods of using geothermal grout. The present disclosure is further directed to an geothermal grout with relative ease of preparation and desirable thermal conductivity while maintaining good sealant properties.

Abstract: The method according to the invention for producing cement clinker comprises substantially the following method steps: raw cement material is preheated in a preheater, the preheated material is heated further in a calcining zone while admitting combustion air, and the material heated in this manner is fired in a kiln to form cement clinker, wherein a part of the waste gases developing in the kiln is used to preheat the raw cement material in the preheater, and another part is diverted, and is used in a heat exchanger to preheat the combustion air used in the calcining zone.

Abstract: The invention relates to mixtures containing alkali-activatable aluminosilicate binders, characterized in that the mixture contains organosiloxane compounds, to the use of organosiloxane compounds for reducing shrinkage in alkali-activatable aluminosilicate binders and to the use for hydrophobization of alkali-activatable aluminosilicate binders. The invention furthermore relates to joint mortars, levelling compounds or coatings which contain the mixtures according to the invention.

Abstract: A concrete product is produced by providing red dune sand having a particle size of 45 microns or less and mixing the red dune sand with hydraulic cement in a ratio of about 30% of the cement being replaced by the red dune sand. The cement and red dune sand are then mixed with fine and course aggregate, water and a superplasticizer and cast after pouring into a mold cavity. Then within 24 hours of casting, the cast article is steam cured for 12 hours under atmospheric pressure, demolded and placed in an auto clave at 100% humidity. The temperature in the auto clave is raised to 180° C. within one to two hours and maintained at that temperature for 4 to 5 hours. The temperature also increases the pressure to about 10 bars. The pressure is released to reach atmospheric pressure within 20-30 minutes and the temperature reduced gradually, so that the article can be removed.

Abstract: A humidity-controlling building material, which is produced by subjecting a molded product obtained by dehydration pressing a kneaded product of a hydraulic composition comprising an autoclaved lightweight aerated concrete powder and cement, and water; to autoclave curing, wherein a volume of pores with a diameter of 0.1 ?m or more is 0.1 to 0.25 cc/g and a pore volume resulting from subtracting a volume of pores with a diameter of 0.1 ?m or more from a total pore volume is 0.2 to 0.5 cc/g exhibits remarkably excellent performance in terms of both strength and moisture absorption and desorption performance.

Abstract: Methods for preventing, reducing, or eliminating construction heave, expansion, distresses, and damage primarily caused by the formation of ettringite are disclosed including introducing fluoride ion releasing agent/salt(s), such as sodium fluoride, calcium fluoride, and potassium fluoride, to expansive soil layers or concrete structural elements and allowing the fluoride ion releasing agent/salt(s) at ambient temperature to react with formed ettringite and to prevent the formation of ettringite of the expansive soil layers or concrete structural elements. Other embodiments are described and claimed.

Abstract: A wellbore servicing method comprises converting a water into an electrochemically activated water, preparing a wellbore servicing composition comprising the electrochemically activated water, and placing the wellbore servicing composition in a wellbore. Also, cement composition comprises a cement and an electrochemically activated water.

Abstract: Process for the preparation of a sprayable hydraulic binder composition containing as main components water, aggregates, hydraulic binder, set accelerator, characterized in, that a calcium silicate hydrate (C—S—H) containing component is added before and/or at the spray nozzle.

Abstract: A system for metering and adding fibres to a cement matrix comprising means (3) for supplying the fibres and means (5) for conveying the fibres designed to convey them, in use, from the supply means (3) to the cement matrix. The conveyor means (5) are closed with respect to the surrounding environment. The present invention also relates to a method for metering and adding fibres to a cement matrix comprising the stage of supplying predetermined quantities of fibres by means of a supply device (3), and conveying these predetermined quantities of fibres from the supply device (3) to a predetermined position while keeping these fibres isolated from the surrounding environment.

Abstract: Methods and compositions that comprise sub-micron alumina for accelerating setting of a cement composition. An embodiment includes a method of cementing in a subterranean formation. The method may comprise introducing a cement composition into the subterranean formation, wherein the cement composition comprises hydraulic cement, sub-micron alumina, and water. The method further may comprise allowing the cement composition to set in the subterranean formation. Another embodiment includes a cement composition that may comprise hydraulic cement, sub-micron alumina, and water.

Abstract: A mixture of material for providing at least a portion of a travelled surface. The mixture includes an aggregate with a plurality of particles. The mixture also includes a hydrocolloidal agent adapted to swell upon exposure to water to form a resilient and flexible binder, for substantially binding the particles of the aggregate together. The aggregate and the hydrocolloidal agent have an initial pH. The mixture also includes an agent for elevating the initial pH to a predetermined pH, and a hydrophilic agent.

Abstract: A method for producing a cementitious slab including mixing together cement with other materials with the combined mixture of materials having physical particle sizes sufficiently small to allow the material to be cut with a vibrating cutting tool when the material is a semi-set state.

Abstract: Methods of making particulates for use in a subterranean application comprising: providing particulates of a settable composition comprising a cementitious material, a filler material, and an activator of the cementitious material; and pre-curing the particulates until the particulates reach a crush strength of about 50 psi or greater; and curing the pre-cured particulates at a temperature in the range of about 230° F. to about 600° F., so that at least a portion of the particulates comprise a newly formed crystalline phase.

Abstract: A geopolymer composite ultra high performance concrete (GUHPC), and methods of making the same, are provided herein, the GUHPC comprising: (a) a binder comprising one or more selected from the group consisting of reactive aluminosilicate and reactive alkali-earth aluminosilicate; (b) an alkali activator comprising an aqueous solution of metal hydroxide and metal silicate; and (c) one or more aggregate.

Abstract: Cementitious formulations and their products with enhanced reactivity are provided. Formulations in certain embodiments may include at least one calcium source, a reactant and a filler in a hydrated environment, wherein the reactant, in one form, is crystalline silica that has been modified for reactivity. Enhancement of a reactant may include one or more modifications to its content, grind and/or the cement to silica ratio, as well as addition of one or more additives in the formulation, additives in the form of at least one alumina source, defoamer, catalyst and/or a clay.

Abstract: Presently described are self-assembling antireflective (“AR”) coating compositions comprising high refractive index surface modified nanoparticles. Also described are various articles such as protective films, optical displays, and windows, comprising such (e.g. dried and cured) AR coating.

Abstract: A method of forming a high strength cement in a permeable starting material, the method comprising the step of combining the starting material with effective amounts of (i) a urease producing micro-organism; (ii) urea; and (iii) calcium ions and wherein the effective amount of the urease producing organism provides a urea hydrolysis rate, under standard conditions, of 0.5-50 mM urea hydrolysed.min?1.

Abstract: The present invention relates to a novel composite structure with enhanced toughness, which incorporates features mimicked from nacre (mother of pearl). The structure can be used in many industrial and clinical applications, including aeronautics (aircraft skin), the defense industry (armor materials); orthopedics and medical devices (tough, biocompatible coatings on prostheses) and micro-electro-mechanical systems (MEMS; increased reliability for critical components).

Abstract: Cementitious compositions and processes for preparing and using the cementitious compositions are provided. The cementitious compositions are characterized by the property of a reduced or an attenuated water vapor emission from a cementitious mix and a concrete formed therefrom.

Abstract: Cementitious formulations and their products with enhanced reactivity are provided. Formulations in certain embodiments may include at least one calcium source, a reactant and a filler in a hydrated environment, wherein the reactant, in one form, is crystalline silica that has been modified for reactivity. Enhancement of a reactant may include one or more modifications to its content, grind and/or the cement to silica ratio, as well as addition of one or more additives in the formulation, additives in the form of at least one alumina source, defoamer, catalyst and/or a clay.

Abstract: A dosing bag for additives that are mixed into a cementitious mixture, wherein the dosing bag is made from a dissolvable starch-based film material. When the dissolving dosing bag with its contents are introduced into a mixture that uses water as an ingredient, the dosing bag dissolves at a particular rate such that the additives are released into the mixture in an even manner. The dosing bag has structural features that enable it to dissolve and release material over an extended period of time. Consequently, the material in the dissolving dosing bag is not released as a clump, but is rather released in a manner that ensures is even distribution during mixing. When the additives are more evenly dispensed throughout a mixture, the quality of the final product is greatly improved.

Abstract: The invention relates to a composition for preparing a liquid mortar or concrete without adding water, to a method for preparing said composition, and to a kit including said composition.

Abstract: Techniques are generally described for producing cement clinker that includes forming cement clinker in a kiln, heating waste additives, and applying the heated waste additives to the cement clinker in the kiln. Additionally, examples are generally described that include an apparatus for producing cement clinker that includes a kiln in which cement clinker is formed and a device having an opening positioned inside the kiln which provides heated waste additives to the kiln for application to the cement clinker. An example device for applying waste additives to cement clinker includes an eductor configured to receive waste additives and transport air in which the waste additives are pneumatically entrained, and includes a lance coupled to the eductor and configured to receive the pneumatically entrained waste additives and receive a support gas that reacts with the waste additives and heats the same for application to the cement clinker.

Abstract: The present invention consists in the use, in a process of manufacture of a composition with a water and hydraulic binder base, of a rheological additive characterised in that it is an emulsion of at least one non-cross-linked copolymer, consisting of: a) (meth)acrylic acid, b) alkyl(meth)acrylate having 1 to 25 carbon atoms, c) a monomer of formula R1—(R2O)m—R3, in which: R1 designates a radical containing a polymerisable unsaturated group, R2O designates an alkylene oxide group having 1 to 6 carbon atoms, m is an integer between 20 and 30, preferentially between 23 and 27, and is very preferentially equal to 25, R3 designates a linear or branched alkyl chain having 28 to 33 carbon atoms, preferentially 30 to 33 carbon atoms, and very preferentially having 32 carbon atoms. The invention also concerns the formulations thus obtained.

Abstract: The invention is in the field of construction and can be used for constructing industrial floors and foundation slabs. The offered composite concrete mixture, comprising cement, sand-stone mixture, water, plasticizer, nano-size pozzolans, shrinkage reducing additive, and steel and/or synthetic fibers, allows the construction of thin, completely jointless without limitation of area, large composite concrete slabs, with no observable shrinkage cracks or curling.

Abstract: Various embodiments of a high-performance environmentally friendly building panel and related manufacturing methods are disclosed. Certain example embodiments described herein relate to various high-performance building panel configurations that utilize at least one engineered mixture produced with a desired thickness, shape and dimension, and manufactured through several preferential manufacturing methods. To selectively enhance some of the high-performance building panel characteristics such as its ability to withstand significant loads, mitigate possible contamination by bacteria growth, as well as its ability to be fire-retardant or fire-suppressant, and other credible operating scenarios the characteristics of different engineered mixtures may be combined during the panel forming process.

Abstract: Described herein is a photocatalytic composite comprising a titanium dioxide supported on metakaolin. In comparison to known embodiments of the sector, the composite of the present invention makes it possible to obtain binders and derived products with high photocatalytic efficiency, even when using photocatalyst quantities which are lesser than those present in products of prior technical art.

Abstract: The invention relates to a mineral, hydraulic binder for producing concrete or mortars or cement suspensions, based on at least one cement. The cement comprises clinker phases such as, C3S, C2S, C3A, and C4AF, which on reaction with water form hydrate phases that cure to form hardened cement. The cement displays a delay phase after mixing with water of some hours, e.g. from 4 to 8 hours, during which time no appreciable curing reaction takes place. The binder further comprises at least one finely divided SiO2 component and at least one finely divided CaO component, which react with make-up water during the delay phase to form calcium silicate hydrate phases that cure as a result of a pozzolanic reaction and produce early strength.

Abstract: The present disclosure is directed to a system and method for managing cement in a subterranean zone. In some implementations, a method of cementing in a subterranean formation includes positioning a cement slurry including a plurality of activation devices in a wellbore. The activation devices configured to release an activator that increases a setting rate of the cement slurry. A signal is transmitted to at least a portion of the cement slurry to activate the activation devices. The activation device releases the activator in response to at least the signal.

Abstract: A detoxification method for obtaining a pigment compound free from acute and chronic aquatic ecotoxicity by mixing at least one zinc-based component with good anti-corrosive properties but high toxicity-with a phosphate or hydrogen phosphate of a magnesium, sodium, potassium, calcium, strontium, aluminum, ammonium, or organic type or any other compound based on such cations, such as carbonates, oxides, silicates, phosphites, pyrophosphates or phosphonates, said phosphates or hydrogen carbonates or carbonates or oxides or silicates or phosphites or pyrophosphates freed from toxicity enabling a very considerable reduction of the toxic power of said zinc-based component, while maintaining the good anti-corrosive properties thereof.

Abstract: A fireproof insulating foamed cementitious composition with thermal energy storage capacity is provided for use in producing wall insulation boards, fireproof claddings for steel structures, inner cores of fire resistant wall or door panels, and the like. The composition demonstrates improved energy efficiency in which phase change materials, such as microencapsulates, are used in conjunction with a cementitious mixture of calcined gypsum and hydraulic cement, lightweight aggregates, a polymer latex, and a foaming solution to create stable air bubbles inside the cementitious matrix. The calcined gypsum and the hydraulic cement are present in a weight ratio range from about 1:3 to about 3:1. The composition may further include reinforced fibers, surfactants, inorganic flame retardants, and other additives.

Abstract: A process for sequestering carbon dioxide in fresh concrete from the exhaust emitted from the combustion of carbonaceous fuel in a concrete mixing truck is disclosed. In the process, exhaust from the engine containing carbon dioxide is redirected after passing through the required environmental controls to the concrete mixing chamber on the concrete truck. This carbon dioxide is allowed to physically mix with the ingredients producing fresh concrete. When the concrete is made from cementitious material which include calcium oxide, then the carbon dioxide may chemically bind with the calcium to form calcium carbonate and be permanently sequestered in the concrete product.