Abstract: A mobile system and process for manufacturing cement additives and/or concrete admixture products comprises at least two tanks each containing a different raw material for manufacturing cement additives or concrete admixtures; a frame for mounting and transporting as an integral unit at least two pumps operative to transfer the raw materials into a blender which mixes the raw materials together to provide a cement additive or concrete admixture for dispensing at the destination site, which could be the manufacturer's new or remote manufacturing site, or even a customer's site such as a cement plant or a ready-mix concrete plant. The frame can be placed upon or attached to wheels, as in a truck or trailer frame, and the tanks may also be placed on or secured to the truck or trailer frame. A preferred skid-mounted system comprises pumps, valves, meters, and a computer processor unit which can control the equipment and permit adjustments to be made at the destination site.

Abstract: An exemplary process for grinding cement clinker using rollers comprises introducing cement clinker into grinding contact with rollers operative to grind the clinker into particles; and introducing to the clinker and/or rollers, in an amount of 0.001-0.5 percent based on the dry weight of clinker, a binding-densifying agent comprising at least one polymer having an average molecular weight of 50,000-500,000. The clinker may be ground alone or in combination with other agrillaceous or pozzolanic materials.

Abstract: Exemplary mechanically-flattened fibers of the invention comprise generally elongate bodies having varied width or thickness dimensions and micro-diastrophic surface deformities. Preferred fibers are elongate synthetic polymer or multipolymer blend fibers for reinforcing matrix materials such as concrete, shotcrete, gypsum-containing materials, asphalt, plastic, rubber, and other matrix materials. Preferred methods for manufacturing such fibers comprise subjecting synthetic polymer fibers to compressive forces sufficient to achieve flattening and surface micro-diastrophism without substantially shredding and abrading the fibers.

Abstract: Mortar cement additives provide workability while retaining strength by employing a multi-stage polymer comprising a hydrophobically-modified, ionically-soluble polymer stage, the polymer being soluble at a pH of 6 and above; and an air-entraining agent. The additives also employ, as optional ingredients, set retarding agents and superplasticizers. Examplary methods of the invention involve addition of the multi-stage polymer and an air entraining agent to the mortar cement, preferably during intergrinding of Portland cement in the mill. Cement compositions comprising the polymer and an air-entraining agent are also disclosed.

Abstract: Improved sprayable gypsum-based fireproofing composition comprising a lightweight aggregate and a set retarding agent in an amount effective to delay the setting of said composition for at least 24 hours and preferably for at least 72-96 hours without causing the composition to swell or shrink or to cause a salt layer to form on the composition when it is spray-applied. The fireproofing composition can retain fluidity in conventional spray hoses overnight and yet is capable of being injected with a set accelerator, such as aluminum sulfate, on the next day or on a successive day when spray-applied onto a substrate.

Abstract: An improved method for modifying slag in an electric arc furnace comprising introducing into the slag, or on top of the slag, vermiculite platelets which have been refined into concentrated form whereby the flakes comprise at least 50%, and more preferably at least 80%, by dry weight hydrated magnesium aluminum (iron) silicate.

Abstract: Exemplary emulsion admixture for use in hydraulic cement compositions formed by emulsifying an antifoaming agent, surfactant, and a comb polymer having a carbon-containing backbone to which are attached cement-anchoring members and oxyalkylene groups. A method of making a stable emulsion admixture comprising the comb polymer, as well as a hydraulic cement composition comprising the admixture, are also described.

Abstract: A hybrid fiber reinforcing system that enhances ductility of concrete at small and large crack openings, while avoiding the necessity of using steel fibers at high (e.g., 1%) volumes, by taking into account Young's modulus, deploying large surface area to volume ratios for improved anchorage, and using different relative lengths.

Abstract: This invention relates to enhancing the compressive strength of cements after 1, 3, 7 and 28 days following hydration and to improving porosity and finished surfaces of the hardened cements and concretes made therefrom. The improved cements are prepared using certain hydroxylamine additives in amounts of up to 0.1% which preferably are added during grinding of the cement in which case the amines further act as grinding aids.

Abstract: An oxygen scavenging composition capable of providing good oxygen absorption capabilities wherein the oxygen scavenging agent is a hydroxosulfitometalate. Methods for making a hydroxosulfitometalate are also disclosed.

Abstract: A grinding aid and an enhanced roll press method of grinding granulated blast-furnace slag by treating the slag feed of the roll press with from about 0.002 to 0.2 weight percent of polyacrylic acid or its alkali metal salt in combination with up to about 4 weight percent water.

Abstract: A gasket for a crown cap to be used on a carbonated beverage, especially a twist-off crown or for a bottle which is to be pasteurized, is formed of a thermoplastic material, which is preferably free of polyvinyl chloride, and which contains a hydrogenated copolymer of styrene and a conjugated diene, or a functionalized derivative thereof. The material is resistant to heat, and provides a gasket with advantageous sealing properties.

Abstract: A rotary union for dispensing of a single central supply of water-based can sealing compound to an orbiting can end lining station includes a rotating reservoir (1) inside a stationary housing (2) with a dip tube (3) carried by the housing extending down below the liquid level of the reservoir. A sensor (4) in the ceiling of the housing determines the liquid level for controlling the admission of the compound through the down tube in response to the level sensed. The seal (7), where the stationary and rotating parts interface, is below the reservoir and simply needs to support gas pressure but does not come into contact with the compound.

Abstract: A cement admixture comprised of a mixture of certain alkyl ether oxyalkylene adducts with certain oxyalkylene glycols to provide cement compositions of mortar and concrete which inhibit drying shrinkage while permitting substantial air entrainment and enhanced compressive strength.

Abstract: A mobile system and process for manufacturing and delivering concrete admixture finished products comprises: providing in separate transport tanks mounted on a vehicular frame at least two raw admixture materials (components); and blending together said at least two concrete admixture raw materials to provide a finished admixture product, whereby a finished admixture product is provided at a customer site, such as at a customer's mixing plant. Preferred processes and systems of the invention employ pump means for feeding admixture raw materials from the transport tanks to a blender, metering means for measuring the amount or rate of raw materials fed into the blender, and quality control units for monitoring physical characteristics of the finished product being delivered.

Abstract: A high early strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which are attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can be added simultaneously as one admixture, or separately. The invention relates also to methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particarly, and also pertains to such hydraulic mixtures containing the calcium salt and copolymer.

Abstract: An exemplary moveable guard rail system of the present invention, useful for preventing fork lift trucks from falling off flat bed trailers, comprises at least two guard rails connected sequentially to each other and to hinged supportive frame members. The guard rails can be moved between extended and retracted positions by hinged arm members which may be powered by hydraulic pistons. Preferably, gimbal bearing members are used for connecting the guard rail or rails to the hinged supportive frame members.

Abstract: A oil barrier waterproofing membrane laminate for waterproofing structural surfaces comprises a bituminous rubber adhesive membrane containing oil wherein on one face of the bituminous membrane is a carrier support structure comprising at least three polymeric layers. The carrier comprises an innermost light-absorbing polyethylene film containing carbon black situated closest to the bituminous membrane; an outermost surface layer comprising a light-reflecting polyethylene film containing a light-reflecting pigment; and at least one oil barrier film situated between the light-absorbing and light-reflecting polyethylene films.

Abstract: Mortar cement additives provide workability while retaining strength by employing a multi-stage polymer comprising a hydrophobically-modified, ionically-soluble polymer stage, the polymer being soluble at a pH of 6 and above; and an air-entraining agent. The additives also employ, as optional ingredients, set retarding agents and superplasticizers. Examplary methods of the invention involve addition of the multi-stage polymer and an air entraining agent to the mortar cement, preferably during intergrinding of Portland cement in the mill. Cement compositions comprising the polymer and an air-entraining agent are also disclosed.

Abstract: A cement admixture composed of a mixture of lower alkyl ether oxyalkylene adducts with a sulfonated organocyclic material to provide cement compositions of mortar and concrete which inhibit drying shrinkage while attaining very high slump and/or increased compressive strength.