Abstract:
The invention relates to polymer-modified cement-containing building material dry mixes which contain a redispersible polymer powder, water retention agents based on polysaccharide structures, a calcium-containing setting accelerator and a superabsorbent copolymer.
Abstract:
A heat-insulating, fire-proof, water-resistant, permeable-to-air, flexible lightweight concrete with a volume-density below 500 kg/m3, made with polystyrene pearl is equally suitable for heat-, and sound-insulation of walls and slabs, as well as decreasing their water permeability or water-absorbing capacity, as well as increasing their resistance to fire at the same time keeping their ability to be permeable-to-air and humidity, for renovation old buildings or building new buildings. Its composition is: polystyrene pearl, or recycled polystyrene of 1-10 mm diameter, water, cement and organic (polymer) binding material mixed with cement: such homo-, co-, and terpolymers—which are water-soluble and/or can be dispersed in water. Resulting from the use of organic (polymer) binding material, the polystyrene pearls can easily mixed with the inorganic binding material and water. The heat-insulating material produced this way can be even 100 kg/m, depending on the quantity of the binding materials.
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 invention provides a manufactured aggregate material that converts waste materials and/or recyclable materials (136) into construction material (154). By mixing waste materials (156) with a metal oxide and an acid, any harmful contaminates in the waste materials (136) are encapsulated and rendered into hard pellets (154) that are suitable for use in conglomerates or composites such as concrete. The manufactured aggregate material (154) may be adjusted for moisture content, density, heat capacity, and other parameters.
Abstract:
A nanocomposite has significant social, economic and environmental benefits. By having high tensile strength and high toughness, a large number of opportunities of applying fly ashes are opened up. Besides replacing ordinary Portland cement, the nanocomposite is able to be used as an inorganic adhesive/resin to make fiber reinforced inorganic composites. The composite is fire resistant and has no volatile organic compounds. Due to its multifunctional character, the nanocomposite is able to be used as a sensing element in intelligent structures, corrosion protection coating for concrete and steel structures and even electronic devices.
Abstract:
Scrap plastic is treated for incorporation into asphalt-aggregate compositions by first shredding the plastic, then heating the shredded plastic to harden any pieces of film or flexible plastic and to generally reduce the size of the shreds without decomposing the plastic, and then grinding the heat-treated pieces to a size that can be blended with an aggregate. The blend is then combined with an asphalt binder to produce an asphalt-aggregate composition. No discrimination among, or selection of, specific types or classes of plastic is required.
Abstract:
A concrete material with fastener retentive qualities that can be varied to approximate the fastening holding characteristics of a selected variety of wood species or composite wood products comprising a mixture of cement binder, aggregate, and pliable material in the following volumetric ratio of approximately one-half (½) to one (1) part cement binder to approximately two (2) parts aggregate to approximately two (2) to five (5) parts pliable additive material. Cement binder can be Portland Cement, fly ash, slag and a combination thereof. Aggregate can be sand, gravel, stone, crushed rock, and a combination thereof. Pliable material can be plastic, cellulose, crumb rubber, and a combination thereof in pelletized, grannular or powdered form.
Abstract:
The present invention is a direct reactive process of inorganic polymerization used to obtain composites whose polymeric matrix does not require chemical or thermal pre-activation of the mixture reactors of specific natural aluminosilicates and varied aggregates, in the manufacture of alternatives to ceramics, Portland cement, timber, gypsum and metallic frames, through an adequate mixture added to the inorganic matrix of one or more natural aggregates (silica, limestone, hydrated lime, vermiculite, asbestos fibers) combined or not with synthetic alkaline-resistant aggregates (tire rubber, polypropylene fibers, nylon, PVA). To these, an alkaline solution of water and sodium hydroxide and/or potassium hydroxide will be added for the molding or extrusion and cutting out of artifacts, which will be oven-dried and polymerized at temperatures between 100° C. and 500° C.
Abstract:
A cement composition for which the mechanical properties of the set cement can be controlled independently of the slurry density, both at high density (>16 ppg) and at low density (
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.