Matches 201 - 250 out of 265 < 1 2 3 4 5 6 >
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5084102 Cement, method of preparing such cement and method of making products using such cement  
A cement based on blast-furnace slag and fly ash, characterized in that the cement is a homogeneous dry particulate mixture in ready-to-use form, which comprises blast-furnace slag having a...
5073197 Cement compositions  
The advantages of high alumina cement (early strength, resistance to sulphate attack) are preserved and its disadvantage (weakens with age) is solved by mixing it 50:50 with silica fume, gasifier...
5040920 Disposal of waste ash  
Waste ash is controlled and adjusted in its water content to result in a compacted permeability of about 10 -5 cm/s or less. With particle size distribution adjustments, the compacted permeability...
5041398 Method for treating incinerator ash  
A process for treatment of incinerator ash typically including heavy metals and both water soluble and insoluble fractions. The insoluble fraction is first removed from the fly ash. The soluble...
5024822 Stabilization of fluorides of spent potlining by chemical dispersion  
A process for treating spent potlining from the electrolytic smelting of aluminum in cryolite includes incinerating the potlining to combust carbonaceous material to form an ash at a temperature...
5002611 Process for manufacturing a hardenable mixture containing coal ash process for manufacturing hardenend granules containing coal ash and building component containing coal ash  
Described is the process for forming a hardenable mixture of a coal ash comprising free CaO and free CaSO 4 .OH 2 O. In order to remove all free CaO the coal ash is mixed with a fly-ash...
4997484 Hydraulic cement and composition employing the same  
A hydraulic cement is formed from a Class C fly ash, an alkali metal activator, and citric acid. Mortar and concrete compositions can be prepared with this hydraulic cement. The cement is...
4979990 Foamable composition  
A composition to be mixed with water to form rapidly a lightweight high strength set product, as well as a method of placing such compositions at a desired location and the reaction produced. The...
4964912 Heat-curing cement composition, method of hardening same, and hardened body formed therefrom  
A heat-curing cement composition comprising 60 to 75% by weight of 3CaO.SiO 2 , in which the total content of 3CaO.Al 2 O 3 and 4CaO.Al 2 O 3 .Fe 2 O 3 is lower than 10% by weight, the alkali...
4956158 Stabilization of fluorides of spent potlining by chemical dispersion  
The present invention provides a process for treating spent potlining from the electrolytic smelting of aluminum in cryolite including burning the spent potlining to form an ash, mixing with a...
4930428 Cement composition comprising sodium tripolyphosphate and process for forming shaped articles therefrom  
Improved cement compositions having greater strength, density, and lesser porosity, than concretes previously known are provided, which are prepared with water which been treated so as to comprise...
4915741 Cementitious mixes  
The fluidizing or water-retention effect of plasticizers and superplasticizers in cement is increased when the cement has been treated with water before the mixing step, so that it retains from 0.1...
4828393 Method for obtaining a base material for building mortar  
A method wherein the extraction of a quantity of sand, with a granular size and distribution ratio, are subjected to a moisturing or dewatering treatment until a moisture content of a maximum of...
4772330 Process for producing low water-absorption artificial lightweight aggregate  
A process for producing a low water-absorbing artificial lightweight aggregate, which comprises: granulating a starting powdery material containing coal ash, having such a particle size...
4749413 Phosphate cement including fly ash for high-strength concrete-like products  
Rapid-setting compositions based on MgO and Al(H 2 PO 4 ) 3 and having at least a ten-minute working time, and thus suitable for mortars and road patching, form concrete-like products having...
4731120 Fill, covering material and embedding material incorporating a hydraulic and a latent-hydraulic binder  
The fill according to the invention comprises a mixture of 1-30% by weight cement with 99-70% by weight of various waste material, fly-ash, de-sulphurization product or granulated blast-furnace...
4708745 Process for the preparation and application in situ of blends of structural material  
A process for the preparation and immediate use in situ of ready to use blends of structural material, such as plaster, mortar, stucco, tile adhesive or similar blends, which, in contrast to the...
4705569 Hydraulic material composition  
A hydraulic material composition comprising cement and 0.01 to 2.0% by weight, as zinc oxide based on the cement, of a zinc-containing compound, such as zinc oxide having an average particle...
4680059 Building material  
The present invention is directed toward a building material comprising from 20 to 70% of a reactive amorphorous silicate material which has been reacted with an aqueous solution of an iron salt,...
4659679 Insulative composition and method of making articles therefrom  
Disclosed herein is a method and composition of matter for constructing temperature resistant parts for the metal making industry from a mix of refractory fibers and Silca-carbon in the form of...
4657561 Method of recovering fuel from coal ash  
A method of recovering fuel from coal ash containing non-combusted carbon in particulate form discharged from a pulverized coal fired boiler, a fluidized bed boiler or a coal gasification furnace...
4622071 Process for producing a hardened product of coal ash  
A hardened product of coal ash having strength sufficient as a civil engineering or construction material is obtained by treating coal ash with sulfuric acid and/or hydrochloric acid to obtain a...
4618376 Method of producing a suspension of fly ash in water  
The subject of the invention is a method of continuous production of fly- in water of a suspension a high concentration of ash with the subsequent addition of slag or granular ash and an...
4615643 Method of sealing off a mass of waste stock containing metal cations  
A method for sealing a mass of stored waste containing cations comprises insulating the waste mass with at least one grout barrier which retains heavy metallic cations. The grout barrier is...
4601832 Method of processing waste materials, particularly sludge containing noxious metals  
A noxious metal(s) containing waste material is treated with an acid solution of a metal of group VIIa or VIII of the Periodical System, preferably iron or manganese. Subsequently, the metal of...
4501618 Method of making a building material  
A building material consists essentially of an aqueous slurry of a dry residue obtained by treating a flue gas containing fly ash from a fossil fuel combustion chamber with a finely divided...
4495162 Preparation of a calcium sulfate anhydrite material of low chloride content  
A calcium sulfate anhydrite material is prepared from a spent absorbent resulting from desulfurization of flue gases. First the sulfite in the spent absorbent is oxidized into sulfate, preferably...
4445937 Pneumatic stowing of construction material comprising calcium alpha- and beta-sulphate hemihydrates  
An improved method for pneumatic stowing of calcium alpha-sulphate hemihydrate, calcium beta-sulphate hemihydrate or mixtures thereof using natural anhydrite, limestone or mixtures thereof is...
4432666 Process for the storage and dumping of waste materials  
A process for forming a compact, water-repellant, non-polluting mass of waste material which includes adding to the waste material a binder and forming a flowable, water-repellant mixture which is...
4398956 Process for treating moist compositions containing pollution-causing substances  
A moist sludge as obtained from gases evolved during steel preparation in converters by blowing oxygen through said liquid steel is treated with 30% flue dust. Preferably the mixing is effected in...
4397742 Composition and method combining fluidized bed residue with scrubber sludge  
A method of treating scrubber sludge removed from a gas scrubbing apparatus of the type adapted to reduce SO x content in the treated gas, is provided. The method comprises collecting the spent...
4355060 High temperature cementitious coatings with improved corrosion resistance and methods of application  
A high temperature protective coating with improved corrosion resistance and method of application for fast setting magnesium oxide, fly ash and other finely divided mineral aggregates with...
4342732 Sludge fixation and stabilization  
The physical and chemical fixation and stabilization of waste products from a sulfur-fuel burning unit through controlled crystallization of dissolved calcium sulfite. A low pH calcium sulfite...
4328037 Process of producing hydraulic cement from fly ash  
A hydraulic cement is prepared by reacting coal fly ash with concentrated phosphoric acid, and crushing or grinding the resulting mixture to granules or a fine powder. The reacted fly ash may be...
4287142 Process for the production of mineral wool products  
A process for the production of mineral wool products comprising admixing fine starting materials, a hydraulic binder, and an inorganic material containing at least 75% SiO 2 and having an average...
4282036 Flowable concrete mixture  
A flowable concrete mixture which possesses high strength and which provides facile placement of the mixture in structural forms composed of cement glue and aggregates, the viscosity of the cement...
4271118 Method of producing a clay pigeon  
A non-toxic clay pigeon with excellent mechanical and ballistic properties is produced by subjecting a mixture consisting essentially of plaster, an amount of water constituting a considerable...
4268316 Masonry cement composition  
A masonry cement is prepared by blending portland cement, kiln dust, and fly ash. The cement of this invention exhibits no efflorescence, good board life, workability, and acceptable color for use...
4256504 Fly ash-based cement  
A cement composition comprising a high calcium-content fly ash and calcium sulfate, and mortar and concrete compositions containing the cement.
4249954 Pozzolanic product produced from bagasse ash  
A product adapted for use as a filtration material, absorption material, or as a pozzolanic material in the production of concrete, is produced from unprocessed sugar mill boiler ash by crushing...
4240952 Method of making concrete from fly ash  
In a method of making concrete of the Portland Cement type wherein a quantity of cementitious material, such as Portland Cement, is mixed with a quantity of aggregate, generally sand and rock in...
4209335 Method and composition, including particular additive for hydraulic cement, for fixing waste matter  
Solidification or consolidation, for fixation of various kinds of waste matter, soil etc. containing toxic contaminants affecting ecological system of the environment, by use of composition made up...
4139488 Method of preparing solid radioactive or toxic waste for long-term storage  
Solid radioactive or toxic wastes are prepared for long-term storage by adding a hardenable binding agent to a container filled with the waste under a partial vacuum. The improved homogeneity of...
4124405 Process for solidifying aqueous wastes and products thereof  
The water-soluble pollutants contained in aqueous industrial, agricultural and domestic waste materials are converted into a water-insoluble solid mass with improved resistance to leaching of the...
RE29783 Process for treating aqueous chemical waste sludges and compositions produced thereby  
Waste sludges containing small amounts of certain types of reactive materials are treated by adding to such sludges materials capable of producing aluminum ions, lime and/or sulfate bearing...
4108677 Process for treating waste sludge from combustion plant desulfurization units and cementitious product of the process  
Aqueous alkaline desulfurization treating units for combustion gases generate as a product an aqueous sludge containing sulfur compounds of calcium. Many such sludge products contain more than 30...
4092109 Method for corrosion inhibition of reinforced bridge structures  
A method of use of calcium nitrite in corrosion control in hydraulic cements that contain metal pieces or structures, and in certain related uses, e.g., snow removal from alite cement bridge decking.
4087285 Method for strengthening vitreous products and composition boards  
A method for the strengthening of glasses, glazes, cement, gypsum board, wood fiber board, mineral fiber board, lime or gypsum by adding fly or filter dust to the starting material after which the...
4040852 Lightweight aggregate  
A lightweight aggregate for use in concrete mixes with Portland cement consists essentially of bottom ash produced as a by-product of burning pulverized coal in a dry-bottom furnace. The ash is...
4018963 Large lightweight gypsum article and a process for the production thereof  
A large lightweight gypsum article comprising anhydrous or hemihydrous gypsum, ettringite, reinforcing members, and, if necessary, fibers and/or light-weight aggregate.
Matches 201 - 250 out of 265 < 1 2 3 4 5 6 >