摘要:
Cementitious compositions and methods for producing the cementitious compositions are described herein. The methods can include mixing a compound of the general formula MaSibXcOd, MaSibXcOd(OH)e, MaSibXc(OH)e, or MaSibXc(OH)e.(H2O)f, wherein M comprises a metal that can react with carbon dioxide in a carbonation reaction to form a carbonate, Si forms an oxide during the carbonation reaction, X is an element other than M or Si, a, b, d, e, and f are greater than zero, and c is zero or greater, with a rapid setting hydraulic cement to produce a cementitious mixture. The methods can further include hydrating the cementitious mixture and carbonating the cementitious mixture. Carbonating the cementitious mixture can occur simultaneously with hydrating the cementitious mixture or subsequent to hydrating the cementitious mixture. In some embodiments, the non-hydraulic cement can comprise wollastonite. The hydraulic cement can be in an amount of from 5 wt % to 80 wt % of the cementitious composition.
摘要:
Polymeric composites and methods for preparing the composites are described herein. The polymeric composites can comprise a polymer, an inorganic filler, and a plurality of short length fibers. The polymer in the composites can include homopolymers and copolymers and can also include plastics, resins, elastomers, thermoplastics, thermosets, and hot melts. The inorganic filler can be fly ash. The short length fibers can have an average length of 650 μm or less. Methods for making the polymeric composites are also described.
摘要:
Cementitious compositions and methods for producing the cementitious compositions are described herein. The methods can include mixing a compound of the general formula MaSibXcOd, MaSibXcOd(OH)e, MaSibXc(OH)e, or MaSibXc(OH)e.(H2O)f, wherein M comprises a metal that can react with carbon dioxide in a carbonation reaction to form a carbonate, Si forms an oxide during the carbonation reaction, X is an element other than M or Si, a, b, d, e, and f are greater than zero, and c is zero or greater, with a rapid setting hydraulic cement to produce a cementitious mixture. The methods can further include hydrating the cementitious mixture and carbonating the cementitious mixture. Carbonating the cementitious mixture can occur simultaneously with hydrating the cementitious mixture or subsequent to hydrating the cementitious mixture. In some embodiments, the non-hydraulic cement can comprise wollastonite. The hydraulic cement can be in an amount of from 5 wt % to 80 wt % of the cementitious composition.
摘要:
Polymeric composites and methods for preparing the composites are described herein. The polymeric composites can comprise a polymer, an inorganic filler, and a plurality of short length fibers. The polymer in the composites can include homopolymers and copolymers and can also include plastics, resins, elastomers, thermoplastics, thermosets, and hot melts. The inorganic filler can be fly ash. The short length fibers can have an average length of 650 μm or less. Methods for making the polymeric composites are also described.
摘要:
Inorganic polymer compositions and methods for their preparation are described herein. The compositions include the reaction product of a reactive powder, an activator, and optionally a retardant. The reactive powder includes fly ash, calcium sulfoaluminate cement, and less than 10% by weight portland cement. In some examples, the composition is substantially free from alkanolamines. In some examples, the ratio of water to reactive powder is from 0.06:1 to less than 0.2:1. Also described herein are building materials including the compositions.
摘要:
Inorganic polymer compositions and methods for their preparation are described herein. The compositions include the reaction product of a reactive powder, anhydrous calcium sulfate, an activator, and optionally a retardant. The reactive powder includes fly ash and no more than 10% by weight portland cement. The anhydrous calcium sulfate is present in an amount of 2% or greater by weight of the reactive powder. Also described herein are building materials including the compositions.
摘要:
Composite materials and methods for their preparation are described herein. The composite materials include a polyurethane made from the reaction of at least one isocyanate and at least one polyol, and coal ash (e.g., fly ash). The composite materials are highly reactive systems such as through the use of highly reactive polyols, highly reactive isocyanates, or both. The coal ash is present in amounts from about 40% to about 90% by weight of the composite material. Also described is a method of preparing a composite material, including mixing at least one isocyanate, at least one polyol, coal ash, and a catalyst.
摘要:
The present invention is a fly ash filler or filler blend having a particle size distribution with at least three modes that can be combined with a polymer at higher filler loadings to produce a filled polymer for polymer composites that, in many cases, can produce improved mechanical properties for the polymer composites over polymer composites using conventional fillers. As a result, superior polymer composites (e.g. those used in carpet backing) can be produced at a lower cost than conventional polymer composites. The present invention also includes a method for producing a polymer composite, comprising the steps of combining a polymer with a fly ash filler or a filler blend having a particle size distribution with at least three modes to produce a filled polymer and producing a polymer composite with the resulting filled polymer. The present invention further includes a method of determining what fly ashes can be used as fillers for polymer composites.
摘要:
The present invention is an admixture for cementitious compositions that provides both good flowability and high early strength as is desired in the art. The admixture of the invention includes a superplasticizer comprising a water-soluble modified acrylic copolymer and at least one accelerant selected from the group consisting of salts of thiocyanic acid, water-soluble alkanolamines, ethylene oxide adducts of ethylenediamine, and morpholine derivatives. The combination of the superplasticizer and the accelerant used in the invention surprisingly has a synergistic effect on the early compressive strength of the cementitious composition and also enhances the W/CM ratio and the flowability of the cementitious composition.
摘要:
Panel systems and related methods of controlling sound transmission are discussed. For example, the panel system may include a sound control component, which may include a foam composite of a polymer and an inorganic filler. The panel system may further include an attachment mechanism, e.g., including at least one fastener, at least one bracket, and/or at least one rail or rail system. The attachment mechanism may be configured to secure the sound control component between a first wall and a second wall, such that the panel system controls sound transmission between the first and second walls.