Abstract: Reversible quadrangular mats of similar construction are provided, defining a grille section on one face and a flat section on the opposite face, and interlocking edgewise joints to edgewisely releasably interlock the mats in coplanar fashion. These joints include thicknesswise grooves made at the peripheral side edge sections of each mat, defining two upturned edgewise lips in two adjacent grooves and two downturned edgewise lips in the two other grooves. The mats are made from a semi-flexible material. One side lip of a first mat is frictionally engageable into one side groove of a second mat, for their interconnection.

Abstract: A compression molded fiberglass reinforced resin grating formed of laterally spaced intersecting load bearing bars and cross bars is partially embedded within a layer of sand overlying the floor material of an animal stall defined by a vertical wall enclosure. At least the load bearing bars of the grating have flat top and bottom surfaces with opposite oblique sidewalls which taper towards each other from the bottom to the top. When embedded in the sand with the flat top surfaces exposed, the tapered load bearing bars resist downward movement into the sand layer due to the wider flat bottoms of the load bearing bars. Sand captured between opposed oppositely oblique walls of adjacent load bearing bars is solidly packed therebetween forming with the load bearing bars and the cross bars a solid mass to further resist downward movement, while permitting drainage of liquid waste therethrough. Soiled bedding may be removed from the top of the embedded grating by shoveling.

Abstract: A floor or walkway has a base and an overlay on the base. The overlay includes a plurality of prefabricated tiles each of which has an upper layer designed to contact objects on the floor or walkway and a lower layer designed to bear against the base. The upper layers are composed of a ceramic while the lower layers are composed of a resilient material having anti-skid characteristics. The upper and lower layers of each tile are adhesively secured or vulcanized to one another during manufacture of the tile. The overlay is formed by simply placing the tile on the base or loosely securing the tiles to the base by means of an adhesive. If the overlay is outdoors, the same or gaps between neighboring tiles are kept open to permit water runoff. The lower layers of the tiles are then formed with drainage channels and/or open pores for the discharge of water which has passed through the seams or gaps.

Abstract: The present invention is directed to a recreation surface which consists of a plurality of resilient, liquid-porous tiles adhered to a liquid-porous sheet that overlies a porous sub-surface and is anchored to the ground. In this way, the tiles are fixed and displacement or removal thereof is inhibited; additionally the porous tiles and sheet facilitate drainage of water from the recreation surface into the porous subsurface.

Abstract: A temporary device is used for street repair work to provide a ramp between the ground roadway surface and the upper end of such structures as manhole supports, etc. The device of this invention is removably secured to the roadway and the manhole cover by a plurality of clips having a first portion embedded within the ramp and a second portion which operably engages the manhole support and manhole cover.

Abstract: The present invention relates to a waterproofing complex for the deck of a road structure, which is intended to receive a surfacing course, the said complex comprising:a bottom layer consisting of a mortar containing about 10 to about 15% of aggregate with a diameter of less than 80 .mu.m, and from about 7.5 to about 9.5% of a bituminous binder based on elastomers, the percentages being expressed by weight relative to the dry aggregate, anda top layer consisting of a bitumen rich in elastomers.It further relates to a process for the waterproof road lining of the deck of a structure.

Abstract: Elastic plates for level railroad crossings have rail-adjacent edges which are profiled in their vertical cross sections to provide the required interlock. The plates have a first pair of grooves in the top and the bottom of the plate running parallel to the rail and have a second pair of upper and lower parallel grooves in the top and the bottom of the plate running transverse to the rail. In each pair of grooves, the groove in the top of the plate is laterally offset with respect to a parallel groove in the bottom of the plate, and each pair of grooves forms an expansion and contraction crease therebetween. Pairs of grooves in the top and the bottom of the plate are spaced, so that the distances between individual expansion creases, or between expansion creases formed by groups of creases, are large relative to the distance between the grooves which constitute the expansion creases.

Abstract: Impact-absorbing safety matting systems include a helipad, a mat for children's play areas, and an athletic sports game surface. All systems have a surface layer with a botton and outer edges, an array of air-filled cells affixed to the bottom of the surface layer, ribs extending a defined distance from the bottom of the surface layer for defining the array of air-filled cells, sealer and aggregate spread over the surface layer and the base immediate to edges, and median ribs extending a shorter distance from the bottom of the surface layer than the defining ribs in order to give added support against a strong blow striking the surface layer and the array of air-filled cells affixed thereto.

Abstract: A temporary device is used for street repair work to provide a ramp between the ground roadway surface and the upper end of such structures as manhole supports, storm sewer inlet grates, etc. The device of this invention is secured to the roadway by a plurality of stakes driven downwardly through the device and embedded in the roadway.

Abstract: Bitumen-polymer compositions are prepared, by mixing, at between 130.degree. C. and 230.degree. C., a bitumen with a styrene and conjugated diene copolymer and a sulphur source, the copolymer and the sulphur source being added to the bitumen either directly, or in the form of a mother solution in a hydrocarbon oil, then by maintaining the whole under stirring at between 130.degree. C. and 230.degree. C. for at least fifteen minutes.By way of sulphur source is used 0.005 to 15% by weight, with respect to bitumen, one or several polymeric or not, cyclic or linear polysulphides, and especially ditertiododecyl or dinonyl pentasulphide. The bitumen-polymer compositions obtained can be used for the obtention of superficial road coverings and present a constant quality of its properties.

Abstract: A porous resilient paving system for use on well-drained soil as a playing surface is described as having(1) a soil-covering layer consisting essentially of mineral aggregate having a thickness in the range of from about 2 to about 4 inches;(2) a layer of fibrous vulcanized rubber particles covering layer (1), said layer (2) having a thickness in the range of from about one-half to about two inches;(3) a core composition layer covering layer (2) consisting essentially of a matrix formed from about 70 to 87 weight percent vulcanized rubber fibers bonded with from about 13 to 30 weight percent of a rubber latex selected from the group consisting of natural rubber latex and synthetic rubber latex; and(4) a topping layer covering layer (3) consisting essentially of from about 68-74 weight percent vulcanized rubber particles of from about 12-30 mesh, zinc oxide in an amount from about 1-7 weight percent and bonded with about 25 weight percent of a rubber latex.

Abstract: An activity field is surfaced with a cushioned, resilient rubber mat over a hard undersurface. One area of the field is subject to participant impact potentially resulting in injury. That area is provided with a closed cell shock absorbing foam pad between the rubber mat and the hard undersurface to permit the mat to flex restrained by the foam pad to attenuate an impact. The rubber mat is bonded to the pad by a flexible adhesive and both the mat and the pad are bonded to said undersurface. The mat extends beyond the perimeter of the pad.

Abstract: A pressure-sensitive adhesive is disclosed which is prepared by hot melt blending paving grade asphalt, a depolymerized virgin rubber, a terpene resin, and a vulcanizable, non-depolymerized styrene-butadiene copolymer. These adhesives are especially useful in forming membranes by coating one side of an asphaltic based coated reinforcement with these adhesives. They are useful for highway repair and maintenance purposes and for waterproofing and show good adhesion to cementitious, for example asphaltic concrete or Portland cement concrete, substrates.

Abstract: A pressure-sensitive adhesive is disclosed which is prepared by hot melt blending paving grade asphalt, a depolymerized virgin rubber, a terpene resin, and a vulcanizable, non-depolymerized styrene-butadiene copolymer. These adhesives are especially useful in forming membranes by coating one side of an asphaltic based coated reinforcement with these adhesives. They are useful for highway repair and maintenance purposes and for waterproofing and show good adhesion to cementitious, for example asphaltic concrete or Portland cement concrete, substrates.

Abstract: A crossing construction for a railway including a plurality of spaced-apart cross-ties that support two parallel rails positioned thereon. The crossing includes a center pad of resilient rubber-like material positioned between the rails. A side pad of resilient rubber-like material is positioned on each side of the railway. Shims are used to position the uppermost surfaces of the center and side pads flush with the tops of the rails. On each side edge of the crossing there is provided a cap of resilient rubber-like material that includes a first leg that extends horizontally under a portion of each side pad and a second leg that extends vertically downwardly and covers the ends of the shims and a portion of the ends of the cross-ties the cap may include an extension pad and an L-shaped reinforcing member.

Abstract: Improved Portland cement compositions and their use in cement coating operations is disclosed wherein acrylic polymers modified by critical amounts of propylene glycol, a coloring ingredient and a defoaming agent such as dimethyl polysiloxane are used as additives substantially increasing the flexibility, abrasion and heat resistance and shear bond characteristics of Portland cement and sand mixtures used in coating compositions for concrete, wood, pressed boards and the like.

Abstract: A textured synthetic running surface and the like comprising a urethane elastomer base having thoroughly dispersed granular particles of urethane or rubber elastomers. Shredded particles of solid urethane or rubber of a nominal maximum dimension of from 0.062 to 0.125 inches are dispersed through the elastomer base and totally encapsulated thereby in concentrations of 26% to 32% by weight to provide a non-slip resilient running surface. The surface is applied by mixing two parts of liquid urethane elastomer in a mixing drum followed by mixing in of the granular particles in measured batches. The batched mixture is discharged from the mixing drum to a hopper which feeds the mixture by way of a pump to an application gun.

Abstract: A road surfacing (3) which emits reduced rolling noise and a method for the manufacture of such a road surfacing is disclosed. The road surfacing material is relatively soft and incorporates air-permeable, preferably intercommunicating channels or pores. In the manufacture of the surfacing, granulate or chip particles (4) are bound so that channels or pores are formed between the particles.

Abstract: Disclosed herein are carbon black-containing asphalt compositions having improved properties of resistance to thermal and actinic oxidation.

Abstract: There are provided improved asphalt cements and bituminous paving compositions containing certain reinforcing filler compositions which impart desirable properties thereto. The filler compositions of the invention are asphalt-dispersible pellets comprising certain carbon blacks which have been treated with certain non-volatile petroleum oils.

Abstract: A composition which in use is applied to existing base surfaces to provide a cushioned protective surface thereon. In its preferred form, the composition comprises, by weight, approximately 60% vulcanized rubber particles, 30% latex solution, 7% water and 3% wetting solution. When applied to existing base surfaces, the composition will dry to form a cushioned, durable, protective surface to which may be conveniently added a sealing layer for weatherproofing purposes, which protective surface is then suitable for use as a sports surface, on playgrounds, or as a roofing material.

Abstract: An outdoor surface composition for surfacing outdoor playing areas or other utility areas comprises a mixture of particulate reclaimed rubber and inorganic particulate solids, such as sand, mixed together and compacted in a particular weight ratio, with each of the components having a designated particle size range. The amount and particle size range of both the reclaimed rubber and the inorganic particulate solids are important in obtaining a composition which is water-pervious for adequate drainage, shock absorbent, resistant to shear under average athletic playing conditions, and compaction resistant. For some applications, organic particulate solids, such as wood chips, peat, manure or cinders, may be included with the composition.

Abstract: A new method is provided for emulsifing a asphaltrubber pavement repair material into a stable thixotropic emulsion capable of flowing as a liquid upon gentle agitation. The method generally comprises the steps of heating asphalt and rubber to form a jellied reaction product, and admixing a asphalt-rubber soap consisting essentially of water, an anionic water soluble emulsifying agent, a thickner, and the halide of an alkali metal or an alkaline earth metal to form a thixotropic emulsion capable of flowing as a liquid upon gentle agitation.

Abstract: Process for dispersing molten sulphur in a hydrocarbon material, such as asphalt, tar and more particularly bitumen. The dispersion is effected in such a way as to produce an emulsion of sulphur in very fine particles, with dimensions not exceeding 10 microns, in the hydrocarbon material. A turbine with a gap or clearance of about 0.1 to 2.25 mm. is very useful for this purpose. The emulsions obtained are particularly suitable for road surfaces.

Abstract: When cast sulfur-asphalt compositions, e.g., sulfur-asphalt-aggregate pavements and construction articles, are being prepared by mixing and/or heating mixtures comprising sulfur and asphalt at elevated temperatures not exceeding 175.degree.C, the evolution of hydrogen sulfide is substantially reduced by carrying out the mixing and/or heating step in the presence of a hydrogen sulfide suppressant selected from the class consisting of free radical inhibitors and redox (oxidation-reduction) catalysts.

Abstract: There are provided improved asphalt cements and bituminous paving compositions containing certain reinforcing filler compositions which impart desirable properties thereto. The filler compositions of the invention comprises certain carbon blacks which have been treated with certain non-volatile petroleum oils.