摘要:
A lightweight concrete composition containing from 10 to 90 volume percent of a cement composition, from 10 to 90 volume percent of particles having an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.03 g/cc to 0.64 g/cc, an aspect ratio of from 1 to 3, and from 0 to 50 volume percent of aggregate; where the sum of components used does not exceed 100 volume percent, and where after the lightweight concrete composition is set it has a compressive strength of at least 1700 psi as tested according to ASTM C39 after seven days. The concrete composition can be used to make concrete masonry units, construction panels, road beds and other articles.
摘要:
A lightweight cementitious composition containing from 22 to 90 volume percent of a cement composition and from 10 to 78 volume percent of particles having an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.03 g/cc to 0.64 g/cc, an aspect ratio of from 1 to 3, where after the lightweight cementitious composition is set it has a compressive strength of at least 1700 psi as tested according to ASTM C39. The cementitious composition can be used to make concrete masonry units, construction panels, road beds and other articles and can be included as a layer on wall panels and floor panels and can be used in insulated concrete forms. Aspects of the lightweight cementitious composition can be used to make lightweight structural units.
摘要:
Methods of constructing concrete walls that include placing a plurality of cleats along a wall perimeter, securing the cleats to a surface under the wall perimeter, placing a plurality of insulating concrete forms along the perimeter, and placing concrete into the insulating concrete forms to form the insulating concrete wall. The cleats include a base plate, a first vertical flange extending approximately perpendicular from the base plate, and a second vertical flange extending approximately parallel to the first vertical flange. The space defined by the first vertical flange, second vertical flange and the base plate, is adapted to receive a bottom portion of a form component or a bottom portion of a form. The insulating concrete forms are placed along the perimeter such that a bottom portion of the form components or a bottom portion of the form are press fit into the defined space.
摘要:
A device and method for producing labeled expanded resin containers; the method including applying a label sheet, formed from a label material capable of maintaining an electrostatic charge, to an inner wall of female portions of two-part molds, positioning one or more male portions of the two-part molds in contact with the corresponding female portions to form one or more mold cavities; adding expandable resin beads or pre-expanded resin beads to the mold cavities; applying a sufficient amount of heat for a sufficient length of time to the mold cavities to effect expansion of the expandable resin beads or pre-expanded resin beads to form labeled containers; cooling the labeled containers; and removing the labeled containers from the mold cavities. The labels on the external wall of the labeled containers present a smooth circumferential surface.
摘要:
Labeled thin-wall containers molded from pre-expanded expandable thermoplastic particles having a label disposed over at least a portion of the outer surface of the container. The particles are coated with a composition that includes at least 2,500 ppm of a salt of a C8 to C32 carboxylic acid based on the weight of the particles. The label has a thickness of from 10 μm to 1,500 μm and the sidewall has a thickness of from 0.5 mm to 5 mm. An aqueous beverage at 80° C. does not leak from the container after being left undisturbed for 24 hours and the container has a rim strength of at least 0.54 kg. The containers are made by placing a label against an inner surface of a female portion of a two-part mold; closing the mold to form a mold cavity; filling the mold cavity with the particles; and fusing the particles.
摘要:
Methods for identifying defective containers that include a) providing a container having an open rim end, a closed base end, an exterior surface and an interior surface; b) directing one or more sources of electromagnetic radiation toward the exterior surface or interior surface of the container; c) positioning one or more sensors for the electromagnetic radiation opposite the exterior or interior surface not directed to in b); d) accepting the container if the amount of electromagnetic radiation detected by the one or more sensors is within a predetermined range; and e) rejecting the container if the amount of electro-magnetic radiation is not within the predetermined range. The methods can be used in devices that contain a) conveying means for moving containers; b) means for directing sources of electromagnetic radiation; c) means for detecting electromagnetic radiation; and d) means for separating containers.
摘要:
A method of placing a concrete compositions including a) combining 3-40 volume percent cement, 5-50 volume percent fine aggregate, 5-50 volume percent coarse aggregate, and 10-22 volume percent water; b) adding 1.5-40 volume percent of prepuff particles to form a concrete composition; and c) pumping the concrete composition to a point higher in elevation than the delivery point of the concrete to place the concrete. The concrete composition contains less than 30 volume percent of other light weighting aggregates and the prepuff particles have an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.02 g/cc to 0.64 g/cc, an aspect ratio of from 1 to 3. The slump value of the placed concrete measured according to ASTM C 143 is greater than 1 inch and the concrete has a density of from about 40 to about 135 lb./ft3.
摘要:
Process for preparing polymer, e.g. polystyrene, particles that may not or may contain a water-retaining agent and that require only a one-step process for incorporating the water-retaining agent. The polymer particles may be prepared via an extrusion process, or a bulk polymerization process wherein a water-retaining agent is blended into the polymer melt. Water is incorporated into the particles by soaking them in hot or cold water or treating the particles with steam for a predetermined time depending on the desired water content in the particles. The water-retaining agent may be starch, zeolite, silica dioxide or poly (N-isopropyl acrylamide) ranging from 0.1% to 10.0% by weight. The particles can be expanded via appropriate means to form pre-expanded or expanded particles in a conventional manner.
摘要:
Foamed plastic structures that include one or more foamed plastic bodies containing a polymer matrix that includes one or more polymers formed by polymerizing a monomer mixture formed by polymerizing a monomer mixture containing vinyl aromatic monomers using a polymerization initiator having a structure corresponding to: R(Y)n where R is a C2 to C32 linear, branched, and/or cyclic aliphatic and/or aromatic group that can also include one or more atoms selected from oxygen, nitrogen, halides, silicon and sulfur, Y is a group that can generate a free radical capable of initiating polymerization of the monomers in the monomer mixture; and n is from 2 to 6. The structures formed can include, as non-limiting examples, pallets, containers, stackable containers, produce boxes, seafood shipping containers, geofoam blocks, and insulated concrete forms.
摘要:
Interpolymer resin particles comprised of 20% to 60% by weight of uncross-linked polyolefin e.g. polyethylene, polypropylene, and from 40% to 80% by weight based on the weight of the particles of a vinyl aromatic monomer, e.g. styrene, that is polymerized in a suspension process to form an interpenetrating network of polyolefin with polymerized vinyl aromatic monomer particles and having a gel content of 0 to 1.5% by weight based on the weight of the particles for improved processability in end-use applications and improved ESCR properties. The interpolymer resin particles have a VICAT softening temperature from about 90° C. to about 115° C., and a melt index from 0.2 to 35.0 g/10 minutes (Condition G). The particles can be mixed with a blowing agent to form extruded foam articles, such as foam board, and can be used in extrusion, injection molding, rotomolding, and thermoforming processes to form a layer, e.g. sheet, film, and as a tie layer in multi-layer structures to bind adjacent layers consisting of incompatible polymers, i.e. polystyrene and polyethylene for improved rigidity in multi-layer structures.