Abstract: A process for producing bituminous surfacing, bituminous surfacing produced y the process and hot plant mix for carrying out the process. To improve the resistance to fracture, the proposed bituminous surfacing contains metal fibers, for example steel fibers of finite length. These fibers can be admixed to the mix of solids mix and bituminous binder in the course of the preparation of the hot plant mix or in the course of laying the hot plant mix. Due to the compaction of the hot plant mix to form the bituminous surfacing, the metal fibres are bent and thus loop around the particles of the solids mix and/or form a network with one another to give a kind of random nonwoven fabric.

Abstract: Polyamide resins are used as primer for highway repairs using asphaltic membranes.

Abstract: Propane-precipitated asphalt is heated with 1-15 wt. % elemental sulfur at 140.degree. to 300.degree. C. until hydrogen sulfide evolution ceases. The sulfur-treated asphalt base material having an increased softening point of about 65.degree.-300.degree. C., is blended with 5-60 wt. % liquid petroleum fraction, such as vacuum gas oil or extract oil, having an equivalent atmospheric boiling point of 370.degree.-500.degree. C., to yield a quality paving grade asphalt cement composition meeting ASTM standards.

Abstract: Propane-precipitated asphalt is contacted with a stream of air at 200.degree. C. and above to increase the softening point of the asphalt. The resulting asphalt base, having a softening point of about 65.degree.-300.degree. C., is then blended with 5-60 weight percent liquid sulfur-treated petroleum fraction, having an equivalent atmospheric boiling point range of 370.degree.-500.degree. C., to yield paving grade quality asphalt cement composition.

Abstract: An improved asphaltic material useful for sealing or patching of porous, interstitial substrates such as concrete or asphalt is provided which achieves superior results by flowing into and at least partially filling the substrate interstices themselves, as opposed to serving merely as a surface coating. The material preferably includes a conventional CRS-1H cationic asphaltic emulsion, respective quantities of a vinyl acrylic copolymer and a NEOPRENE latex. In one type of sealing application, a diluted quantity of the asphaltic material is heated to about 160.degree. F. and is flooded over the substrate to be sealed; the liquid passes into and fills the substrate voids, and, after hardening of the material, an effective, gasket-like seal for the substrate is presented which retains its integrity during varying ambient weather conditions and under hard use.

Abstract: A modified asphalt cement including manganese chloride (MnCl.sub.2) dispersed throughout the asphalt cement. A paving composition including the above material forming a binder for aggregate used for paving roads or the like.

Abstract: The employing of finely-divided and naturally-occurring particulate matter of Trinidad Asphalt to lock or hold the aggregate filler mixture of the pavement mix in position, almost entirely filling the mix with soft bitumen, permitting subsequent compacting (as by rolling) to a state of substantial voidlessness, and thereby achieving a pavement which is both strong with respect to bearing strength yet soft and/or flexible with respect to its tendency to crack, and which will optimize a sort of self-rehealing of the membrane if cracking should start to occur.

Abstract: A low density particulate vanadium-containing metallic ash concentrate, at least 50 percent of the articles of said concentrate having a diameter not greater than about 1 micron, is produced from a partially gasified coke comprising metallic components including vanadium components by heating the partially gasified coke in an oxidizing atmosphere at a temperataure below the fusion point of the metallic components.

Abstract: There is provided a method for depositing asphalt from an asphalt emulsion onto an aggregate, as in road construction. Prior to applying the asphalt emulsion, the aggregate is wetted down with water containing a minor amount of an anionic or a cationic coupling agent selected to have a charge opposite to that of the asphalt emulsion.

Abstract: An additive for admixture with road surface preparation materials to prevent formation of ice and to melt snow on the finished road surface. The additive is distributed throughout the road surface and comprises coated particles of a halide, e.g. calcium chloride, coated particles of an alkali metal hydroxide, e.g. sodium hydroxide and a trace of coated or uncoated particles of calcium hydride, the coatings being of a water-tight inert substance such as linseed oil. These coatings are worn away at the road surface by traffic to expose the particles.

Abstract: There is described a method for road surface marking with tape material, including the steps of forming an essentially bituminous primer layer on such surface and then pressingly laying a prefabricated tape material on said primer layer, such layer being formed with an essentially thermoplastic composition containing at least 60% by weight of solid thermoplastic substances fluidified for intimately contacting the road surface. The layer is capable of quickly solidifying to a viscosity of at least 10.sup.3 - 10.sup.4 cP for receiving the tape material and then up to at least 10.sup.5 cP within 30 seconds to provide a bond between the tape and said surface capable of resisting horizontal stresses of at least 1.5 Kg/cm.sup.2. Thereafter, the later further hardens at ambient temperature resist to a stress of at least 3 Kg/cm.sup.2. There are also described devices for applying such composition and tape and for melting the said solid thermoplastic substances.

Abstract: Disclosed are: (1) A composition comprising a major amount of catalytically air-blown asphalt and minor amounts of plasticizer and solvent for the asphalt; (2) a method for curing uncured concrete comprising coating the uncured concrete with the composition set forth above, then curing both the concrete with the composition; and (3) cured concrete coated with a composition comprising a major amount of catalytically air-blown asphalt and a minor amount of plasticizer.

Abstract: There is described a method for road surface marking with tape material, including the steps of applying a thin layer of an essentially liquid hydrophilous wetting agent on said surface, of forming an essentially bituminous primer layer thereon, and then pressingly laying a prefabricated tape material on said primer layer, such being formed with an essentially thermoplastic composition containing at least 60 % by weight of solid thermoplastic substances fluidified for intimately contacting the road surface, capable of fastly solidify at least to 10.sup.3 - 10.sup.4 cP for receiving the tape material, then up to at least 10.sup.5 cP to provide a bond of the tape to said surface capable to resist to horizontal stress of at least 1.5 kg/cm within 30 seconds, and further harden at ambient temperature to resist to a stress of at least 3 kg/cm. There are also described devices for applying such composition and tape and for melting the said solid thermoplastic substances.

Abstract: The dissolving and/or dispersing of relatively large proportions of reclaimed rubber into molten paving asphalts is facilitated by incorporating into the asphalt a minor proportion of a highly aromatic, high-boiling, high-flash-point mineral oil. The resulting mixtures can be held at temperatures above 300.degree. F for substantial periods of time without becoming too viscous for convenient handling, thereby facilitating the application thereof to roadways. The rubberized asphalt mixtures are particularly useful in the form of stress absorbing membrane interlayers between old, damaged pavement surfaces and an overlayer of new asphalt concrete, for providing chip-seal coatings over old pavement, as crack fillers in Portland Cement concrete or asphalt concrete pavements, and bridge deck waterproofing membranes.

Abstract: A system of temperature determination and control for molten bituminous material during construction of built-up roofs is provided wherein a heating temperature is preselected based upon a number of factors and is adjusted insofar as may be called for upon checking the temperature upon application to the roof deck. Factors considered in the predetermination include type of bituminous material, type of roofing material, and deck type and temperature; ambient temperature, cloud cover, and wind speed; and also opportunities for cooling of the bituminous material between temperature-controlled and deck locations, during application to the deck, and thereafter until application of an overlying layer of roofing material.

Abstract: A water-proofing/sound-proofing coating composition comprises, in order, from a surface to be coated (A) a prime coat comprising (1) a paint binder, (2) a heat absorber, comprising a dark, preferably black, pigment, (3) a volatile solvent, and optionally (4) an inert fller, and (B) a membrane coat comprising (1) a polyurethane formed from (a) a mixture of high molecular weight polyols and low molecular weight chain stiffeners and (b) a polyisocyanate, (2) a nonvolatile extender and (3) a volatile solvent. The surfacing composition can also include an overlay of a wearing surface such as an asphalt concrete.

Abstract: A composition for admixture with road surface preparation materials to prevent formation of ice and to melt snow on the finished road surface. The composition is distributed throughout the road surface and comprises particulate thawing substances at least some of which have a watertight coating resistant to the thawing substance and to the temperature at which the composition materials are prepared for application as a road surface. The coating may, however, be worn away by mechanical action, e.g. traffic movement, to expose the thawing substance.

Abstract: An insulating and protective structure for frozen substrates wherein a hydrophobic or water impermeable base layer is applied first to the substrate and successive layers of a polyurethane foam or similar synthetic plastic foam material are foamed in place on the base layer, each of said foam layers having a vapor penetration-resistant layer on its upper surface and below the next layer of foam. Finally, there is applied a hydrophobic or water impermeable layer to the upper surface of the uppermost vapor penetration-resistant layer.This structure is designed particularly for application to substrates underlain with permafrost in the Arctic and sub-Arctic regions. It is designed to provide moisture penetration resistance, low thermal conductivity and to have both high compressive and flexure strength in order to impede heat transfer even with consequent freeze-thawing of the frozen substrate and likewise prevent physical damage to the surface of the substrate.

Abstract: Surfaces of roads, bridges, floors, etc., are easily paved by using a mixture of at least one of granular, powdery and flaky asphalt material and a suitable paving aggregate and applying heat and press thereto at the working site.

Abstract: Surface coating compositions consisting essentially of (a) at least one of coal tar and asphalt, (b) an epoxy resin and (c) at least one of tetrasubstituted boron salts of onium ions and tetrasubstituted boron salts of imidazolium ions, which are suitable for coating the surface of concrete, asphalt, metals or the like.

Abstract: Asphalt emulsions are rapidly hardened by incorporating therein an isocyanate-terminated urethane prepolymer formed by reacting one equivalent of the OH group of a polyalkylene glycol having the following formula ##EQU1## wherein p + r .gtoreq. q, q .gtoreq. O, p .gtoreq. 1, r .gtoreq. 1 and 20 .ltoreq. p + q + r .ltoreq. 100, with 1.1 to 2.0 equivalents of the NCO group of an organic diisocyanate.