Abstract: A concrete treating composition including an aqueous solution of a polymer binder and water is disclosed. The composition is added to unset concrete during various concrete finishing steps in a process to treat the upper region of the concrete and protect the finished concrete from staining, wear, erosion, damage from chemicals and weathering. In an alternative embodiment, a wetting agent is also added to the composition.

Abstract: A paint formulation is disclosed which will paint snow without harming either animal or plant life. The paint may be pre-formulated in a powdered form as is prepared for use by merely adding water. A process of allowing one to paint or draw on snow whereby a coloring agent, such as food coloring, is mixed with a gelling agent, such as household gelatin, and applied with a spray or squirt gun. When the gel solution contacts the cold snow, the gel solution quickly sets up and is prevented from dissipating as snow undergoes partial melting. When snow melts, the gel liquefies and disappears with runoff water.

Abstract: This invention relates to a process and compositions for conditioning soils, beaches and roadways by treating the surface or the roadway construction materials of these areas with a granular composition or an aqueous solution containing a protein-polysaccharide complex. The treated surfaces and roadway materials have improved erosion resistance.

Abstract: A method is disclosed for rehabilitating an exposed cut surface of a rock formation after rock cutting has occurred so that the fresh cut surface becomes weathered and natural within several weeks to facilitate restoration back to its original shade as a part of the natural scenery. Weathering occurs by applying a solution containing FeCl.sub.2 or MnSO.sub.4 to the surface of the rocks to be colored. These rocks are limestone, dolostone, phosphorite and concrete. A method for preparing a weathering solution is also disclosed.

Abstract: Cement compositions and processes for improving the bond between new hydrating cement-based materials and the surface of "old" cement-based substrates are disclosed. A mechanically and chemically integral bond is created between the surfaces of the cement-based materials by moistening the old cement-based surface, exposing the moist surface to carbon or carbonate sources (such as with carbon dioxide) and then applying a new hydrating cement-based material thereon. The treatment of the surface of the cement-based substrate as described above creates an aqueous phase chemistry thereon which is compatible to the aqueous phase chemistry of the hydrating cement-based materials applied thereafter. The compatibility of the aqueous phase chemistries results in a mechanically and chemically integral bond formed between the surface of the old cement-based surface and the hydrating cement-based materials.

Abstract: A slump-resistant, curable polymer concrete composition, suitable for coating onto a concrete surface or an asphalt surface to resurface same, comprising (a) 5 to 95 weight percent of an aggregate at least 20 percent of which has a minimum particle dimension of 1/16 inch or greater, (b) 5 to 95 weight percent of a curable polymer composition containing an ethylenically unsaturated polymer containing carbon, hydrogen and oxygen in the molecule and carbon-bonded carboxyl groups or carbon-bonded hydroxyl groups or both in the molecule, (c) an effective amount of a curing catalyst effective to initiate the curing of the polymer, and (d) at least one reactive, time-delay thickener comprising (1) a Group IIA metal oxide or hydroxide in the amount of 0.1 to 20 equivalents per carbon-bonded carboxyl group of the polymer, the Group IIA metal oxide or hydroxide being reactive with the carboxyl groups of the polymer to thicken said polymer concrete composition and/or (2) a polyisocyanate in the amount of 0.

Abstract: The present method induces an oxidation-proof ferric silicate coating on iron sulfide such as pyrite and marcasite. The method includes the steps of placing the pyrite to be treated in a reaction vessel and leaching the pyrite with a coating composition including water, an oxidizing agent and a silicate coating agent. Examples of oxidizing agents include hydrogen peroxide, sodium hypochlorite, potassium hypochlorite and mixtures thereof. The silicate coating agent may be sodium metasilicate. In order to ensure the formation of the stable coating, the leaching is performed at a pH of 4-6 and more preferably 5. Additionally, the oxidizing agent is maintained at a concentration of substantially 0.6% by weight of the coating composition while the concentration of the silicate coating agent is maintained at at least substantially 1.8.times.10.sup.-3 M/l.

Abstract: A method for controlling and/or eliminating harmful lawn grass insects is disclosed, which comprises: foaming a surfactant composition having a total content of components present of from 0.2 to 50% by weight and comprising at least one surfactant selected from an anionic sulfonate, a higher fatty acid containing from 8 to 30 carbon atoms and salts of the higher fatty acid and a thickener; and applying the foam onto the surface of lawn grass in a thickness effective for controlling and/or eliminating the harmful lawn grass insects.

Abstract: A method and apparatus for continuously coating particulate such as rubber with liquid binder and applying the same to a substrate to form resilient athletic surfaces. Total encapsulation of the particulate with the liquid binder is accomplished prior to applying the mix to the substrate. In addition, the method of delivery of the particulate and binder maintains the ratios thereof uniform. In its method aspects, the instant invention involves separately introducing a stream of particulate and a stream of binder into a spray nozzle, where they are combined and delivered to the substrate. The apparatus includes a nozzle assembly having a central lumen and an elongated tip, the lumen being formed so as to force the particulate introduced therein to follow a circuitous or indirect path therethrough and thereby decrease its velocity prior to being ejected from the nozzle.

Abstract: The invention relates to extended, organic pigments, their method of manufacture and their use in paint formulations, particularly those suitable for road or traffic markings. The subject pigments typically comprise a particulate lithopone core coated with a layer of an organic pigment. According to preferred embodiments, the pigment comprises an azo compound, the pigments are rosinated, and/or the core also contains a colorant or doping material, typically a metal oxide or metal salt. An exemplary method involves mixing particulate lithopone with a coupler such as acetoacet-o-anisidide. A coupler precipitator, typically an acidifier, is then added in an amount sufficient to precipitate the coupler onto the lithopone. The lithopone-bound coupler is then reacted with a diazonium ion in an azo-coupling reaction to form a pigment. The pigment-coated lithopone particles may then be heated and coated with a rosin or modified rosin soap.

Abstract: A system and process for forming an instant, fixedly attached but removable game court on any type of concrete, black-top, asphalt, or like outdoor hard surface, which allows a game involving frictional contact of the players with the hard surface to be played on the game court without the removal of the game court, and the subsequent easy removal of the game court by rinsing of the hard surface with water from a conventional garden hose or by natural rainwater.

Abstract: A chipseal overlay coating having in situ deicing properties. An absorbent material such as lightweight aggregate, is mixed with oil, asphalt and/or concrete to form a thoroughfare chipseal overlay. Deicing materials are applied to the overlay or to the absorbent material prior to the mixing process. Due to the highly absorbent nature of the chipseal overlay, the deicing material is absorbed. During icing and snow conditions, the impregnated material reacts with the ice and snow to cause them to melt.

Abstract: A repair and rehabilitation treatment process for reinforced concrete structures involves the removal of concrete from above rebar or other metal reinforcement material in the concrete structure. After removal of concrete, the metal reinforcement materials are saturated with corrosion inhibiting agents. Saturation is best achieved by multiple spray applications of the corrosion inhibitor. The cavity in the concrete structure with the treated rebar or other metal reinforcement materials is then backfilled and/or overlaid with repair concrete. Preferably, the repair concrete includes corrosion inhibitors which will diffuse to the rebar over time or is a low permeability concrete that reduces the rate of diffusion of chloride corrosion causing agents to the rebar. The repair and rehabilitation process significantly increases the concrete structure's service life.

Abstract: A method for preserving porous structures, including masonry structures having embedded structural or reinforcing steel rods, applies liquid preservative material to an exposed surface of the structure and injects the material into the structure using the blasting force of a compressed air stream at high velocity. The apparatus for practicing the method includes separate manifolds having multiple outlet nozzles provided for the liquid material and for the air streams, both manifolds covered by a shroud. The manifolds and their nozzles are arranged so that, as the liquid is applied to the surface of the structure, the high velocity air forces or injects it into the interior of the structure, so as to coat the interstices of the inner porous structure including any reinforcing steel therein, the high velocity air streams acting as a fluid hammer. The preservation of the structures occurs without the need of disturbing, breaking open or repairing brick, concrete or masonry structures.

Abstract: A process affording protection to solid surfaces and especially coastal areas against hydrocarbon pollution involves applying a protective layer composed of polysaccharides containing pendant carboxyl groups, such as alginates or lightly methylated pectins.

Abstract: A process for reinforcing paving in which a second layer of paving is placed on top of a first layer. The process includes selecting a semi-rigid, open grid reinforcement of multi-filament reinforcing strands being fixed at cross-over points, the grid being in the form of a roll, a resin being applied to the strands of the grid and an activatable adhesive being applied on the resin to one side of the grid, continuously unrolling the grid, adhesive side down, essentially directly, evenly and flatly onto the first layer of paving, while maintaining the respective strands of the grid in substantially parallel alignment, activating the adhesive by applying one of heat and pressure to adhere the grid to the first paving layer and substantially eliminate bubbles, raised portions or sideways distortion of the strands of the grid during application of the second layer and applying the second layer of paving on top of the grid and the first layer.

Abstract: In the process of the invention, multi-component resins are applied to porous, granular materials intended for subsequent consolidation. Application is carried out by feeding the components, physically separated from each other, under relatively high pressure, to a mixing chamber, mixing them by turbulent means in the mixing chamber, and applying the resulting mixture, at relatively low pressure, as a thin curtain in laminar flow to the material. The simplest form of the device of the invention comprises: a) separate feed lines for the components at relatively high pressure; b) a mixing chamber preferably designed as a static mixer; c) a fan spray nozzle working at relatively low pressure. The process and device are used to increase the sound-absorption and/or ease-of-cleaning characteristics of a railway tracks, to increase the cross-sliding resistance of railway sleepers on ballast, and to smooth the transition between a soft and hard railway track.

Abstract: The invention provides a glycol additive for two component resin compositions which are particularly useful as concrete crack sealants. The glycol additive is selected from the group consisting of glycerine, ethylene glycol, diethylene glycol and triethylene glycol and can be included in either the resin or hardener component.

Abstract: The present invention is directed to a coating composition and a process for sealing an asbestos containing matrix. The coating composition may be a two-part, aqueous, emulsion based composition or a one-part, aqueous, emulsion based composition. The process comprises forming a continuous, permanent, protective coating comprising a polymer and an antimicrobial agent and leaving the coating and matrix in place to permanently seal the asbestos in the matrix.

Abstract: A method utilizing non-reactive fillers in the sealing of unstable rock strata under wet or humid conditions, the method comprising providing (a) from about 10 to about 85% by weight of a water soluble alkali metal silicate, (b) about 0.7% to about 10.0% by weight of a water soluble or water miscible reactant for said alkali metal silicate and (c) about 2 to about 50% by weight of non-reactive filler, bringing components (a), (b) and (c) together with sufficient mixing to form a sealing composition, applying the composition in a coating to the rock strata and permitting the composition to set while being exposed to wet or humid conditions to form an impervious sealant coating thereby imparting structural strength and reinforcement and preventing penetration of air and dust through the rock strata. Preferably the non-reactive filler comprises a minor proportion, for example from about 0.2% to about 10% by weight based on the weight of the sealant composition of reinforcing fibers.

Abstract: Means, methods and compositions for simulating natural desert varnish. A solution containing soluble metallic acetate salts selected from the group consisting of iron (II), manganese(II) and mixtures thereof and indigenous clay when appropriate is sprayed on distressed or abused natural or artificial rock to produce a preselected patina which is compatible to the indigenous area.

Abstract: A method of installing a cementitious composition includes providing a dry fast setting cementitious composition having a set time and in the form of finely divided particles of at least one cement binder, pouring an amount of the dry cementitious composition into a volume of water located in a hole without any type of physical mixing of the cementitious composition and water other than the mixing which occurs merely by applying the cementitious composition into the water. The major portion of the particles of the cementitious composition have approximately the same drop rate through the volume of water. The water contacts the dry cementitious composition when poured into the volume of water to hydrate the particles of the dry cementitious composition, the particles of cementitious composition dropping through the water to displace excess water and form the hydrated cementitious composition particles in a substantially non-segregated mass.

Abstract: A concrete fluid structure deteriorated to the condition of removal of substance of the concrete by sulfuric acids and like corrosive material in contact therewith is restored by a substratum of epoxy foam, polyurethane foam, or a combination thereof having a relatively thin layer of polyvinyl chloride or polyethylene bonded to the outward facing surface of the foam and bonding the layer to the structure. A method for forming the substratum in the location of the deteriorated structure is described.

Abstract: The soil composition of this invention is comprised of a mixture of sand, clay, a plasticizer material, water, and a coloring pigment, if desired. The components of the soil composition are preferably present in the following proportions by weight: sand 50-70%; clay 10-40%; plasticizer 0.5-5.0%; water 5-20%; and coloring pigment 1-5%. The method of making the invention involves continuously mixing a portion of the sand and the plasticizer in an agitation mixer. The same becomes coated with the plasticizer, whereupon a quantity of clay is then added, followed by an additional portion of the plasticizer material It is particularly important that the sand particles become coated with the plastizing compound and clay. The coloring pigments are added and mixed thereafter. As soon as complete mixing takes place, material can be immediately transferred from the mixer to suitable packaging.

Abstract: Methods and compositions for controlling fugitive dust emissions from bulk granular or powdered solids are disclosed. Fugitive dust emissions are controlled by applying an aqueous, foamed solution including a water-soluble cationic polymer to dust producing bulk, granular or powdered solids. The cationic polymer is incorporated into an aqueous foam comprising anionic, amphoteric or cationic foaming agents.

Abstract: Resurfacing surfaces of highways, roads, etc. to provide skid-resistant surface by preparing polymer concrete composition containing a curable polymer composition containing ethylenically unsaturated polymer having carbon-bonded carboxyl groups and/or hydroxyl groups and at least one reactive thickener comprising Group IIA metal oxide or hydroxide or a polyisocyanate; mixing the resulting mixture with aggregate; coating said surface with the resulting composition; compacting and shaping the resulting composition and curing the compacted, shaped composition on said surface.

Abstract: The present invention provides: a cement/asphalt mixture comprising an aggregate, an asphalt emulsion, cement, a hydraulic inorganic material and water, characterized in that the surfaces of aggregate fragments are covered with the asphalt particles prepared by the coalescence of asphalt emulsion and that the hydraulic inorganic material and water are present in the interstices between the aggregate fragments; a process for preparing a cement/asphalt mixture, the process being characterized by the steps of adding 2 to 12 parts (in terms of solids content) of a cationic or anionic asphalt emulsion to 100 parts of an aggregate; mixing them; and mixing the resulting mixture with 1 to 20 parts of a hydraulic inorganic material; and a process for preparing a cement/asphalt mixture, the process being characterized by the steps of adding 2 to 12 parts (in terms of solids content) of a cationic or anionic asphalt emulsion to a mixture of 100 parts of an aggregate and 0.

Abstract: A method utilizing non-reaction fillers in the sealing of mine stoppings, such as concrete block under wet or humid conditions, the method comprising providing (a) from about 10 to about 85% by weight of a water soluble alkali metal silicate, (b) about 0.7% to about 10.0% by weight of a water soluble or water miscible reactant for said alkali metal silicate and (c) about 2 to about 50% of non-reactive fillers, bringing components (a), (b) and (c) together with sufficient mixing to form a sealing composition, applying the composition in a coating to the stoppings and permitting the composition to set while being exposed to wet or humid conditions to form an impervious sealant coating thereby preventing penetration of air and dust through the stoppings.

Abstract: A method and apparatus for covering substrates such as landfills, sewage, contaminated soil, sludge deposits, compost piles and the like. A protein based solution, preferably mixed from a foam concentrate, is mixed with air in a foam production nozzle and then spread to an approximately uniform thickness over the surface of the substrate.In an alternative embodiment the present invention also relates to a method for providing a foam covering to substrates such as buildings and other natural and artificial structures to protect such substrates from adverse environmental conditions such as polluted air or water, insects, extreme hot and cold temperatures and toxic vapors or substances.

Abstract: A skid-resistant, surface marking material is disclosed. The skid-resistant, surface marking material comprises a polymer matrix phase and a plurality of opaque ceramic spheroids partially embedded in and protruding from the top surface of the matrix layer. The ceramic spheroids have rounded surfaces and no substantial points.

Abstract: A process for applying and providing an enhanced polyester-based polymer concrete overlay on a porous substrate structure is provided. The process requires first applying a monomeric high-molecular weight acrylate- or methacrylate-based pretreatment composition to the substrate and then forming the polyester-based polymer concrete overlay over the treated substrate.

Abstract: Dry cementitious compositions and packages and methods for their application. The dry compositions do not have to be mixed with water but instead are poured, sprayed or troweled onto a substrate which contains water in an amount in excess of that necessary for the hydration of the cementitious materials. These compositions can be applied by layering, dropping through a conduit, or preferably, merely dropped into the water.

Abstract: A composition is disclosed which is useful for the water-repellent impregnation of porous mineral building materials. The composition is based on organosilicon compounds which contain alkoxy groups and comprises an emulsion which contains 2.5 to 25% by weight of an alkoxysilane of the formulaR.sup.1 -Si(OR.sup.2).sub.3whereinR.sup.1 is an alkyl group with 3 to 12 carbon atoms andR.sup.2 is a methyl or ethyl group, 2 to 20% by weight of an alkoxysiloxane of the formula ##STR1## wherein R.sup.3 is an alkyl group with 1 to 6 carbon atomsa is 0.8 to 1.2 andb is 0.2 to 1.2,0.01 to 5% by weight of an emulsifier, 0.01 to 0.1% by weight of fillers with an effective surface area of at least 40 m.sup.2 /g and 49.9 to 95.48% by weight of water. The composition has a long shelf life and, due to its high penetration, a high water-repellent effect on the surface, as well as deep within, all mineral building materials.

Abstract: A thermal barrier coating for substrates comprising zirconia partially stabilized by yttria and having a density greater than 88% of the theoretical density with a plurality of vertical macrocracks homogeneously dispersed throughout the coating to improve its thermal fatigue resistance. The invention also discloses a process for producing the thermal barrier coating.

Abstract: The invention relates to a process for strengthening the adhesion of polymeric substances which contain organic groups or are made up of such groups, or substances containing organic groups which can be crosslinked to form polymers, to surfaces containing an inorganic carbonate, preferably alkaline earth metal carbonates, which comprises applying a solution of a phosphorus compound to the surface containing an inorganic carbonate, in which the phosphorus compound is a phosphorus acid or a phosphorus-containing organosilicon compound having at least one group of the formulaRSiOP.dbd.O,in which R is an SiC-bonded, monovalent, substituted or unsubstituted hydrocarbon radical, and the solvent is an aprotic organic solvent, removing the solvent and thereafter applying the polymeric substance or substance which can be crosslinked to form a polymer to the surface containing the inorganic carbonate.

Abstract: A method for using an ambient-temperature-drying aqueous elastomeric coating composition is provided. The coating composition comprises at least two mutually incompatible water-insoluble polymers, with at least one of the polymers comprising N-methylol functionality. The coating composition is used, for example, for high gloss elastomeric wall coatings or for sports surface coatings.

Abstract: A skid-resistant pavement marking sheet including a top surface and a plurality of skid-resistant ceramic spheroids embedded in and protruding from the surface. The ceramic spheroids are fired from a raw material mixture including 10-97 wt. % mineral particulates, 3-90 wt. % alumina, and at least 1 wt. % binder, at a temperature of about 1300.degree. C., have an outer surface rich in alumina concentration relative to the center of the spheroid, and are resistant to crushing and fracturing.

Abstract: A polymer concrete system has been discovered which is useful in road overlay and repair in both wet and dry conditions. The binder for this aggregate-filled system consists of a liquid epoxy resin and triethyleneglycol diamine or tetraethylene glycol diamine combined with polyoxypropylene glycol diamine curing agent. A piperazine accelerator ensures adequate strength development after short cure times at ambient temperatures.The binder-aggregate system is relative flexible, has excellent compression and flexural strength and adheres well to the substrate. The system is distinguished by its binding strength to smooth or rough surfaces whether the surfaces are wet or dry.

Abstract: A method for realkalizing concrete, layers of which have become carbonated and thus acidified as result of exposure to air of the surface of the concrete. The method presupposes that the concrete still contains adjacent layers that have not yet become carbonated. A substantially water-tight adherent coating is applied to the surface of the concrete that is exposed to air. Thereafter, the concrete is caused to become saturated with water from a source external to the concrete structure, and this condition of saturation is maintained for a period of time sufficient to effect a diffusion of alkaline materials from the relatively less carbonated layers of the concrete into the relatively more carbonated layers thereof. The carbonated layers thus become realkalized, so that further deterioration of the concrete structure is significantly arrested.

Abstract: A method of posttreating a concrete structure to provide corrosion inhibiting properties by heating the structure to remove entrapped water, cooling the structure under a maximum temperature gradient of +2.degree. C./in. thickness, applying an aqueous solution of corrosion inhibitor and then an aqueous wash.

Abstract: The invention relates to a process for filling space in a structure with a polyurethane composite in the presence of water which comprises adding a coarse aggregate and certain polyurethane binders to the space of the structure to be filled. The process is particularly useful for filling space in roads, runways, and other structures made of asphalt, concrete, or similar building materials.

Abstract: An aqueous foamable membrane-forming composition comprised of a water dispersible polymeric latex, preferably styrene-butadiene latex, and an alkyl ether sulfate surface active agent. The composition desirably contains a alcohol having 12 to 14 carbon atoms, an acrylic acid polymer viscosity modifying agent and powdered carbon. Compositions of the invention in dilute aqueous form can be foamed and deposited on a surface to be covered, such as a landfill. Upon standing, the foam develops into a substantially stable, weather resistent membrane.

Abstract: The process for hardening ballasts and other heaped structures calls for an adhesive, which is pourable at ambient temperatures, to first be transformed into the solid state by means of cooling. Then, the application of the liquid adhesive onto the heaped structure is time-dosed by the thawing of the cooled adhesive.

Abstract: A patch binder for road surface repair is capable of being sprayed under pressure onto existing road surfaces to foster seamless homogenizing and mending of existing road surface material with added asphalt patch material. The patch binder is composed of Toluene, Cyclohexanone, N-methylpyrrolidone, a surfactant and a black dye. It is non-hazardous to humans and to the environment, can be applied independent of weather and climate conditions, and lasts as long as the material of the road surface to which it is applied.

Abstract: An improved method and apparatus are provided for resurfacing recreational (e.g., tennis) courts and other surfaces. The apparatus includes self-contained drive means including drive wheels mounted on an elongated frame structure, and additionally supported for rolling movement on a plurality of casters. The apparatus is provided with flexible blade and brush elements for spreading and smoothing court resurfacing material uniformly across the surface. In a forward resurfacing direction, flexible squeegee-type blades, with or without associated brushes, engage the resurfacing material ahead of the device, while flexible brush elements engage the resurfacing material behind the device to erase tracks caused by the drive wheels and casters, and to effect final smoothing and texturing of the resurfacing material. The drive wheels may be moved into and out of ground engaging contact, and a steering device provides for lifting one or the other of the drive wheels out of ground engaging contact.

Abstract: Method and apparatus are provided for resurfacing recreational (e.g., tennis) courts and other surfaces. The apparatus includes self-contained drive system including drive wheels mounted on an elongated frame structure, and additionally supported for rolling movement on a plurality of casters. The apparatus is provided with flexible blade and brush elements for spreading and smoothing court resurfacing material uniformly across the surface. In a forward resurfacing direction, flexible squeegee-type blades, with or without associated brushes, engage the resurfacing material ahead of the device, while flexible brush elements engage the resurfacing material behind the device to erase tracks caused by the drive wheels and casters, and to effect final smoothing and texturing of the resurfacing material. The drive wheels may be moved into and out of ground engaging contact, and a steering device provides for lifting one or the other of the drive wheels out of ground engaging contact.

Abstract: A method and apparatus for dispensing a substance to a work area in which the method includes the steps of determining the quantity of the substance to be dispensed substantially evenly to the work area, calculating the rate of dispensing the substance to the work area for the quantity determined in the determining step to achieve substantially even dispensing, dispensing the substance to the work area at the calculated rate during movement over the work area, and adjusting the rate of dispensing at intervals during such movement to minimize error in such dispensing.

Abstract: Novel polyurethane formulations especially useful as membranes for the protection of bridge deckings. The polyurethane is prepared by mixing two components, A and B. Component A comprises castor oil, a low molecular weight polyol having a molecular wieght between 92 and about 200, preferably with an elastomer. Component B is a modified MDI, being either (i) a mix of 4,4'- and 2,4'-isomers of diphenylmethane diisocyanate or (ii) a diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxyalkylene).

Abstract: Composition for preparing a polymer concrete, a method of protecting or reconditioning surfaces by treatment with the composition, the protected or reconditioned surfaces thus-treated, and multi-package systems for bringing the components of the composition to an application site, wherein the composition comprises a substantially non-aqueous slurry of (1) an aggregate material and (2) a monomer binder system effective to bind the aggregate, upon curing, into a polymer concrete, the binder system comprising (a) a liquid comonomer component, (b) a solid, thermoplastic macromonomer component dissolved in the comonomer and comprising a linear polymer terminated at one or both ends with a polymerizable end group, and (c) a polymerization catalyst.

Abstract: A method of forming a temporary barrier between a substrate and the atmosphere by applying to the substrate a layer of foam generated from an aqueous composition comprising specified agents. Certain compositions especially adapted for this purpose are also provided.