Abstract: A grout for repairing a conduit, such as an underwater conduit comprises, as mixed, from 40 to 50 wt % cement; from 25 to 35 wt % water; and, from 0.05 to 0.25 wt % psyllium husk; based on the total weight of the grout as mixed.

Abstract: A cover composition that can be applied to a bulk material pile, such as landfill refuse, to protect the pile from wind, precipitation, and access by animals and insects is provided. The cover composition is a mixture of a liquid, typically, water; bentonite clay; and synthetic fibers. The composition may be enhanced by the addition of one or more of the following additives: Portland cement, pregelatinized wheat starch, synthetic polymers, soda ash, and latex paint. Unlike prior art cover compositions, the disclosed composition adheres well to waste material, most notably plastics, whereby the composition is easy to apply and provides a substantially uniform, durable protective cover to landfill refuse piles and other bulk materials. Methods of applying the composition to bulk material piles are also disclosed.

Abstract: A concrete for making articles such as fixtures, furniture and other accoutrements having high compressive and resistive strengths, good machining, cutting and abrasion resistance properties and an aesthetically pleasing finish. This concrete is obtained through mixing a composition comprising hydraulic binder, aggregate, pozzolan, a dispersant, fibers, a pozzonically reactive and/or inert filler, water and preferably a non-chloride set accelerator.

Abstract: A refractory includes a cement, a binder and a matrix. The matrix comprises both stainless steel fibers and organic fibers. The refractory can be easily cast, without additional steel reinforcement, into large fire wall 16 panels 10 capable of meeting the requirements of testing conducted in accordance with ASTM E-119, Standard Test Methods for Fire Tests of Building Construction and Materials in support of IEEE Std. 979-1994, Guide for Substation Fire Protection. The fire wall 16 assembly withstood the fire endurance test without passage of flame and gases hot enough to ignite cotton waste during a four-hour fire exposure. The assembly also withstood a 45? water stream for five minutes immediately following the four-hour fire exposure period. This is a stringent mechanical requirement, as all fire walls 16 must maintain their integrity before, during and after a fire, per the Universal Building Code=s definition of a true fire wall 16.

Abstract: A hydraulic composition of the present invention includes (A) 100 parts by weight of cement having a Blaine specific surface area of 2,500 to 5,000 cm2/g, (B) 10 to 40 parts by weight of fine particles having a BET specific surface area of 5 to 25 m2/g, and (C) 15 to 55 parts by weight of inorganic particles having a Blaine specific surface area which is 2,500 to 30,000 cm2/g and which is larger than that of the cement. The inorganic particles (C) may comprise 10 to 50 parts by weight of inorganic particles (C1) having a Blaine specific surface area of 5,000 to 30,000 cm2/g and 5 to 35 parts by weight of inorganic particles (C2) having a Blaine specific surface area of 2,500 to 5,000 cm2/g.

Abstract: A method of producing a water resistant fiber-cement product. The water repelling agent can be added or applied to the fiber-cement or indeed the material forming the fiber cement at a number of different stages in the process. The resultant material has increased water impermeability over conventional fiber-cement products.

Abstract: The present invention relates to a filamentary film construct which is used in providing cementitious mixtures supplemental and reinforcing strength upon setting, and more particularly, to a unitized filamentary construct which comprises a plurality of oriented reinforcing filamentary film components combined with a circumferential retaining element, said circumferential retaining element providing temporary retention of the oriented reinforcing filamentary components until such point the unitized filamentary substrate is incorporated and subjected to mechanical agitation during preparation of a cementitious blend or mixture. The unitized filamentary film construct is endowed with inherent and improved dispensability and dispersability of the associated reinforcing filamentary component into organic or inorganic cementitious matrixes, such as concrete, mortar, plaster, etc. The oriented reinforcing filamentary film components can comprise fibrillated film components.

Abstract: The present invention provides foamed cement compositions with improved mechanical properties and methods of cementing in subterranean formations, particularly in conjunction with subterranean well operations. The foamed cement compositions comprise carbon fibers, a hydraulic cement material, sufficient water to form a slurry, an expanding additive, and optionally other ingredients including a weighting agent, a retarding or accelerating agent, or the like.

Abstract: A mixture of metal fiber concrete based on cement, granular elements and water, comprising metal fibers whose diameter ranges from 1.15 mm to 1.8 mm, wherein the form coefficient thereof is between 35 and 45. The dosing of metal fibers is at least 80 kg/m3. This concrete mixture is particularly adapted to the creation of structural elements such as floor slabs without traditional reinforcements.

Abstract: The problem of fiber or particle settling in well cement slurries is addressed by providing a fluid containing two fiber components of differing properties. Such a well treatment fluid, comprising a base fluid; a first fiber component that it substantially more dense than the base fluid; and a second fiber component that has a density close to that of the base fluid and is relatively flexible.

Abstract: The present invention provides methods and compounds for the in situ formation in concrete of chloride sequestering compounds that resist corrosion of metals contained within the concrete. These chloride sequestering compounds may include, but are not limited to, compounds having the formula 3CaO.Fe(2-x)AlxO3.Ca(NO2)2.nH2O and 3CaO.Fe(2-x)AlxO3.Ca(NO3)2.nH2O, where x ranges from about 0 to 1.4 and n ranges from about 8 to 24. In one embodiment, at least one Fe-containing additive is introduced into cement, and at least one anion-containing additive is introduced into mixing water. When the cement and mixing water are combined to create fresh concrete, the additives react to form chloride sequestering compounds. In another embodiment, the additives are introduced or mixed directly into fresh concrete that has already been formed, where they react to create chloride-sequestering compounds. “In situ” formation refers to the creation of a chloride sequestering compound within concrete.

Abstract: The present invention relates to a fiber-reinforced cement based or cementitious material, and process for making, where the reinforcing fiber is a chemically treated cellulose or non-cellulose fiber. The fiber reinforced cementitious material includes (i) cement, (ii) optionally, sand, aggregate, or sand and aggregate, and (iii) chemically treated fibers having a polyvalent cation content of from about 0.1 weight percent to about 5.0 weight percent based on the dry weight of the treated fibers. The present invention further provides for a fiber reinforced cementitious material having a weak acid content of from about 0.5 weight percent to about 10 weight percent based on the dry weight of the treated fibers.

Abstract: Cement compositions with improved mechanical properties and associated methods are provided, which are useful in conjunction with subterranean well operations. In certain embodiments, the cement compositions comprise carbon fibers, rubber particles, a hydraulic cement material, sufficient water to form a pumpable slurry, and optionally other ingredients including a dispersant, a weighting agent, a retarding or accelerating agent, or the like.

Abstract: Foamed cement compositions comprising carbon fibers, a hydraulic cement material, sufficient water to form a slurry, an expanding additive, and optionally, other ingredients, including any suitable additives.

Abstract: Fiber reinforced concrete has thin steel wire of diameter between 0.05 and 0.3 mm such as cut from recycled vehicle tires. To avoid the problem of balling when mixing, two alternatives are suggested. The first consists of strands of fiber, which demonstrate excellent bond characteristics. The second consists of a mixture of fiber lengths and thicknesses, giving a wide distribution of l/d ratios not exceeding 250, which has the effect of reducing balling tendency so that significant densities can be achieved.

Abstract: The problem of fiber or particle settling in well cement slurries is addressed by providing a fluid containing two fiber components of differing properties. Such a well treatment fluid, comprising a base fluid; a first fiber component that it substantially more dense than the base fluid; and a second fiber component that has a density close to that of the base fluid and is relatively flexible.

Abstract: A fiber reinforced cementitious material and the fiber used therein are disclosed. The fiber reinforced cementitious material includes a conventional cementitious material and less than 5 pounds per cubic yard of the cementitious material of fibers dispersed therein. The fibers are made of a mixture of a thermoplastic polymer and an organometal compound wherein the metal of the compound is selected from the group consisting of Ti, Si, Zr, Al, and combinations thereof, and the organometal compound comprising less than 10% by weight of said fibers.

Abstract: Purposeful addition of crack-initiating voids in the form of low tensile strength particulates, particulates having low matrix interaction, or gas bubbles formed by chemical reaction, in a size range of 0.5 mm to about 5 mm, and preferably of a size commensurate with or larger than naturally occurring crack-initiating gaseous voids, to fiber-reinforced strain hardening cementitious composites generates controlled and uniform cracking which increases strain hardening behavior in conventionally dense cementitious compositions.

Abstract: The present invention relates to a thickened aqueous solution, or gel solution, for use in providing fiber to a cement composition. Additionally, the present invention relates to a method for adding fibers to cement.

Abstract: A corrosion inhibiting composition for use in reinforced concrete structures, the inhibitor composition reducing the rate of corrosion in metallic reinforcing rods placed within the structures. The composition includes a combination of one or more corrosion inhibiting agents and one or more silica neutralizing agents.

Abstract: The present invention provides methods for resisting corrosion of metal elements in concrete, and associated compounds and structures. Acid mine drainage sludge is used as a source of a precursor compound that reacts with a source of anion to form a chloride-sequestering compound. The precursor compound may have the formula 2Me?(II)O·(Y(2?x),Y?x)O3+qMe?(II)O, where at least one of Y and Y? is present; Y and Y? are different and are independently selected from the group consisting of Al, Fe, Cr, and not present; Me? is a cation and is selected from the group consisting of Ca, Ba, Sr, Mn, and Zn; x is a number ranging from 0 to 2; and q is a number ranging from 0 to 2; and combinations thereof. In a preferred embodiment, the precursor compound has the formula 2CaO(Fe(2?x),Alx)O3+CaO.

Abstract: In some embodiments, alternate sources of aluminum or calcium are provided in various ways including the desired compounds. The further object of the present invention contemplate in situ creation of the compound in interest in fresh concrete and as a slurry which can be employed in remediation of existing concrete structures. A method of resisting corrosion in concrete containing metal elements is provided. It includes introducing into fresh concrete, containing metal elements, at least one compound capable of sequestering chloride ions. The method may also involve employing a compound which is capable of establishing a corrosion resistant oxide layer on the metal reinforcing elements. The invention also includes certain compounds which may be employed in the method as well as concrete structures containing the compounds.

Abstract: A concrete article comprised of concrete having therein a reinforcing fiber, where at least about 50 percent of the reinforcing fibers are frayed only at an end or ends of the reinforcing fibers, may be made by mixing concrete, water and a reinforcing fiber for a sufficient time to fray the ends of at least 50 percent of the fibers and curing the mixture to form the concrete article. The fiber may be a reinforcing fiber comprised of at least two filaments bonded together and the filaments being comprised of a polymeric core and a polymeric sheath comprised of a fusing-fraying polymer, such that the reinforcing fiber, when mixed with inorganic particulates, frays predominately only at an end or ends of the fiber.

Abstract: A concrete article comprised of concrete having therein a reinforcing polymer that has a surface comprised of a thermoplastic hydroxy-functionalized polyether or polyester. The concrete article is made by mixing concrete, water and a reinforcing polymer that has a surface comprised of a thermoplastic hydroxy-functionalized polyether or polyester and curing said concrete mixture forming the concrete article.

Abstract: The present invention relates to a fiber-reinforced cement based or cementitious material, and process for making, where the reinforcing fiber is a chemically treated cellulose or non-cellulose fiber. The fiber reinforced cementitious material includes (i) cement, (ii) optionally, sand, aggregate, or sand and aggregate, and (iii) chemically treated fibers having a polyvalent cation content of from about 0.1 weight percent to about 5.0 weight percent based on the dry weight of the treated fibers. The present invention further provides for a fiber reinforced cementitious material having a weak acid content of from about 0.5 weight percent to about 10 weight percent based on the dry weight of the treated fibers.

Abstract: Noncorroding reinforcing steel, and steel reinforced concrete, which has an adherent bond with hydrated concrete formed by a thermally sprayed hydraulically reactive layer of a material such as blast furnace slag on the steel surface.

Abstract: A fiber reinforced cementitious material and the fiber used therein are disclosed. The fiber reinforced cementitious material includes a conventional cementitious material and less than 5 pounds per cubic yard of the cementitious material of fibers dispersed therein. The fibers are made of a mixture of a thermoplastic polymer and an organometal compound wherein the metal of the compound is selected from the group consisting of Ti, Si, Zr, Al, and combinations thereof, and the organometal compound comprising less than 10% by weight of said fibers.

Abstract: An object of the present invention is to provide a hydraulic-composition bonded magnet having moldability, heat resistance, corrosion resistance and high strength. A hydraulic-composition bonded magnet according to the present invention is characterized by that a magnetic powder is held in a hydraulic composition produced by cure of a hydraulic powder. Preferably, in the hydraulic-composition bonded magnet, the hydraulic composition is cured together with a non-hydraulic powder. More preferably, a processing modifier is added to the hydraulic-composition bonded magnet.

Abstract: A concrete in which metallic fibers are dispersed, obtained through mixing with water a composition including a cement; ultrafine elements with a pozzolanic reaction; granular elements distributed into two granular classes (C1)>1 mm and <5 mm and (C2) ranges from 5 to 15 mm; cement additions; an amount of water E added in the mixture; a dispersant, and preferably a superplasticizer; metallic fibers, in an amount maximum equal to 120 kg per m3 of concrete, the contents of the various components (a), (b), (C1), (C2), (d) and the amount of water E, expressed in volume, meeting the following relationships: ratio 1: 0.50?(C2)/(C1)?1.20; ratio 2: 0.25?[(a)+(b)+(d)]/[(C1)+(C2)]?0.60; ratio 3: 0.10?(b)/(a)?0.30; ratio 4: 0.05?E/[(a)+(b)+(d)]?0.75; ratio 5: (d)/(a)?0.20. The invention applies to the manufacture of voussoirs without frameworks, of tiles and of elements of the plate, shell type or the like.

Abstract: The invention concerns the use of organic fibers having a melting point lower than 300° C., an average length l more than 1 mm and a diameter Ø not more than 200 ?m, in ultra high performance concrete for improving the concrete fire resistance, the amount of organic fibers being such that their volume ranges between 0.1 and 3% of the concrete volume after setting and the concrete having a compressive strength at 28 days of at least 120 Mpa, a bending strength of at least 20 Mpa, and a spread value in non-hardened state of at least 150 mm, the values being for a concrete preserved at 20° C., the concrete consisting of a particularly hardened cement matrix wherein metal fibres are dispersed.

Abstract: The present invention relates to compositions comprising the reaction product of amorphous silica or ultra-fine silica and one or more bases. The present invention also relates to materials and method involving the use of such products. In particular, the present invention i.a. relates to new mineral wool products, e.g. products comprising man-made vitreous fibres (such as glass fibres, slag fibres, stone fibres and rock fibres) or perlite, having included therein a binder component which comprises amorphous silica and aklali metal organosiliconates, e.g. potassium methyl siliconate. An important feature of such products is the preparation of the binder systems under vigorous mixing. Such products provide good fire, heat and sound insulating properties. The present invention also provides to a method for removing odorous substances from a gas where materials prepared from ultra-fine silica, water, and one or more components enabling porosity-conferring binding of the material, e.g. a base or bases.

Abstract: The invention relates to a fiber/cement composite, the cementitious matrix of which has a water/binder ratio of less than 0.25 and consisting of cement, aggregate elements, fine pozzolanic elements and a plasticizer. The reinforcement consists of three types of fiber: a) metal fibers having a length of between 15 and 25 mm and a diameter of between 0.25 and 0.3 mm, in a percentage by volume of between 0.5 and 3%; b) metal fibers having a length of between 5 and 10 mm and a diameter of between 0.15 and 0.2 mm, in a percentage of between 4 and 7%; and c) 1.5 to 5% of short metal fibers having a length of less than 3 mm. The strength of this composite in uniaxial tension is greater than or equal to 30 MPa. It exhibits positive work-hardening and ductile behavior in uniaxial tension.

Abstract: The invention relates to a novel cement-bound material with a mineral binding agent, a mineral filler and/or mineral aggregates. Said cement-bound material has a proportion of a mass hydrophobing agent comprised of stearates, siliconates, silanes or siloxanes ranging from 0.5 to 20 wt. % with regard to the weight of the mineral binding agent. The cement-bound material also has a proportion of a corrosion inhibitor, which is capable of migrating and which is comprised of nitrites, benzoates, amio alcohols or of sodium monofluorophosphates ranging from 01. to 20 kg per m3 of the active substance, and/or has a proportion of flexible fibers.

Abstract: To provide a high ductility to tensile load and compressive load and to enhance workability, the present invention provides a high performance fiber reinforced cementitious composition comprising fragments of a steel cord stranded wire accounting for 0.5 vol % or more and less than 1.5 vol % and fragments of at least one type of organic fibers accounting for 2.5 vol % or less.

Abstract: The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.

Abstract: The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous or non-aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.

Abstract: A cement repair material composition is provided for repairing thin concrete. The composition comprises, in weight percentages: fine aggregates, 50-80%; cement, 10-20%, said cement being selected from the group consisting of expansive hydraulic cement, gypsum cement, and magnesium phosphate cement; reinforcing fibers such as polyethylene, steel and fiberglass fibers, 1-5%; and a first water-reducing chemical additive, and a second shrinkage compensating chemical additive, a combined 0.01 to 5%.

Abstract: To provide a high ductility to tensile load and compressive load and to enhance workability, the present invention provides a high performance fiber reinforced cementitious composition comprising fragments of a steel cord stranded wire accounting for 0.5 vol % or more and less than 1.5 vol % and fragments of at least one type of organic fibers accounting for 2.5 vol % or less.

Abstract: Described is a composite material and therefrom produced cured, preferably shaped, articles having a thermal conductivity and specific gravity on demand by selecting an appropriate inorganic aggregate and a cementiteous binder composition, said binder composition comprising a binder and ultrafine particles. With the addition of a polymer based superplasticizer self compacting properties at any desired specific gravity can be achieved. No mechanical compaction or vibration is needed for the production of shaped articles. The mixture can be polymer- and/or fiber reinforced. Workability time and hardening can be adapted to job site needs by addition of set retarders and/or accelerators and/or by heating.

Abstract: The invention relates to a process for preparing an aqueous polymer dispersion comprising an emulsion polymer a polymer composed of at least 5% by weight of an ethylenically unsaturated monocarboxylic acid, dicarboxylic acid or dicarboxylic anhydride (acid polymer SP for short), and an alkoxysilane of the formula SiR1R2R3R4 in which the groups R1 to R4 independently of one another are each an organic radical with the proviso that at least one of the groups is an alkoxy group, which comprises preparing said emulsion polymer by emulsion polymerization in the presence of at least some of the alkoxysilane.

Abstract: A concrete includes organic fibers, dispersed in a cement matrix. The cement matrix includes elements having predetermined particle sizes. The organic fibers have predetermined lengths and diameters. The behavior of the concrete is improved both with respect to the occurrence of minute cracks and the propagation of large cracks as a result of a synergistic effect between the cement matrix and the organic fibers.

Abstract: The present invention relates to a fiber-reinforced cement based or cementitious material, and process for making, where the reinforcing fiber is a chemically treated cellulose or non-cellulose fiber. The fiber reinforced cementitious material includes (i) cement, (ii) optionally, sand, aggregate, or sand and aggregate, and (iii) chemically treated fibers having a polyvalent cation content of from about 0.1 weight percent to about 5.0 weight percent based on the dry weight of the treated fibers. The present invention further provides for a fiber reinforced cementitious material having a weak acid content of from about 0.5 weight percent to about 10 weight percent based on the dry weight of the treated fibers.

Abstract: The present invention relates to a thickened aqueous solution, or gel solution, for use in providing fiber to a cement composition. Additionally, the present invention relates to a method for mixing fibers with cement.

Abstract: The present invention relates to a thickened aqueous solution, or gel solution, for use in providing fiber to a cement composition. Additionally, the present invention relates to a method for mixing fibers with cement.

Abstract: The present invention relates to materials used for building products, construction projects, structural objects, mechanical devices and other materials applications. Specifically, the invention concerns composite materials made with reinforcing elements in a binder matrix material. A method of strengthening materials is described that uses high volumes of reinforcing elements, which can be easily dispersed and uniformly distributed, consisting of large diameter fibers, miniature rods or other similar geometric shapes with a diameter or thickness between 0.05 mm and 20 mm where the reinforcements are incorporated either as short, randomly distributed elements or long, continuous aligned arrays.

Abstract: A method of resisting corrosion in concrete containing metal elements is provided. It includes introducing into fresh concrete, containing metal elements, at least one compound capable of sequestering chloride ions. The method may also involve employing a compound which is capable of establishing a corrosion resistant oxide layer on the metal reinforcing elements. The invention also includes certain compounds which may be employed in the method as well as concrete structures containing the compounds.

Abstract: The invention concerns the use of organic fibres having a melting point lower than 300° C., an average length l more than 1 mm and a diameter Ø not more than 200 &mgr;m, in ultra high performance concrete for improving the concrete fire resistance, the amount of organic fibres being such that their volume ranges between 0.1 and 3% of the concrete volume after setting and the concrete having a compressive strength at 28 days of at least 120 Mpa, a bending strength of at least 20 Mpa, and a spread value in non-hardened state of at least 150 mm, the values being for a concrete preserved at 20° C., the concrete consisting of a particularly hardened cement matrix wherein metal fibres are dispersed.

Abstract: The present invention uses a three-dimensional metal reinforcing aggregate as an aggregate in producing a common ready-mixed concrete according to its object of use in producing the ready-mixed concrete and a mortar. Since it is the three-dimensional metal reinforcing aggregate, it is a technique to enhance the external pressure, internal pressure and tensile strength when the ready-mixed concrete is hardened and solidified. Since the three-dimensional metal reinforcing aggregate is forced into between an aggregate and an aggregate in the ready-mixed concrete, the aggregate and the aggregate are further bound, thereby enhancing the internal pressure, the external pressure and the tensile strength. For example, if split, crack and the like is generated on the concrete body near the cold joint of the placed concrete, the conventional concrete body leads to drop thereof and causes an accident.

Abstract: The invention relates to fiber compositions that can be pumped and metered in the fashion of fluid chemical admixtures into a concrete mix, thereby enabling the fibers to be dispensed by concrete ready-mix plant operators who can provide verification of fiber administration and dosage. The fibers, particularly plastic shrinkage control fibers having large cumulative surface area, are suspended in an aqueous or non-aqueous medium such that their surface area is already wetted out, thereby virtually assuring that substantial uniform fiber dispersion can be achieved without clumping and the delay that is usually required by fiber intermixing.

Abstract: The present fiber reinforced cellular concrete is produced through a chemical reaction that does not require high heat or pressure ovens (autoclaves). Among its unique features, is the fact that different compression strengths can be obtained by varying the proportion of ingredients and resulting densities. The concrete utilizes a base of a pozzolanic product with aluminum powder, lime, calcium formate, cement, and polypropylene fiber is added, along with water. Expanded shale, clay or slate is added to provide lower shrinkage to the resulting mass reducing cracking. Optionally, sand and compatible reinforcing material can also be added.