Abstract: In one embodiment of the present invention, a method comprises a plurality of operations. An operation is performed for depositing a quantity of article-forming media within a media receiving cavity of article forming equipment. After depositing at least a portion of the article-forming media within the media receiving cavity, an operation performed for depositing a volume of a prescribed fluid into the media receiving cavity. Depositing the prescribed fluid includes moving a first fluid delivery device through the quantity of the article-forming media while injecting the prescribed fluid through the first fluid delivery device into the quantity of the article-forming media.

Abstract: A structural element for use as a brick, construction block, panel, floor or suchlike in the building trade, comprises at least one part made of conglomerate material, such as concrete and suchlike, to which an insert made of insulating or filling material is constrained, to define peripherally at least a connection face for connection to another structural element, the connection face has visible a first surface of the insert and at least a connected second surface of the part made of conglomerate material. On the connection face one or more other structural elements are able to be combined, along a support plane (R, R1, R2) provided in correspondence with the connection face, so as to be laid and stably connected by means of a layer of binder material. The second surface has a seating made longitudinally and lowered with respect to the support plane (R, R1, R2), on which seating the layer of binder material is located. The seating has a determinate depth (D), with respect to the support plane (R, R1, R2).

Abstract: Pressure cast lined steel pipes comprise an annular concrete or mortar liner along an inside diameter, and a metal shell surrounding the liner, wherein the liner is in direct contact with the metal shell. The wall thickness of the liner can be from 10 to 50 times the thickness of the metal shell. The pipe may be coated with a dielectric material. A mold assembly used to form the pipe includes an annular concrete or mortar composition chamber formed between the metal shell and an inner mold member. Pressurized water is used in the mold assembly to pressurize the concrete or mortar composition and exert a desired pressure force onto the metal shell while the composition cures in the mold. Once a desired degree of cure is achieved, the pressure is removed causing the metal shell to exert a desired compression force onto the cured liner.

Abstract: A method of making a masonry block employing a mold assembly having a plurality liner plates each having a major surface that together form a mold cavity having an open top and an open bottom, wherein at least one liner plate is moveable between a retracted position and a desired extended position within the mold cavity. The method includes providing a negative of a desired texture on the major surface of the moveable liner plate, moving the moveable liner plate to a retracted position, closing the bottom of the mold cavity by positioning a pallet below the mold assembly, filling the mold cavity with dry cast concrete via the open top, vibrating the mold assembly and dry cast concrete therein, and moving the moveable liner plate to a desired extended position during the vibrating.

Abstract: In one embodiment of the present invention, a method comprises a plurality of operations. An operation is performed for depositing a quantity of article-forming media within a media receiving cavity of article forming equipment. After depositing at least a portion of the article-forming media within the media receiving cavity, an operation performed for depositing a volume of a prescribed fluid into the media receiving cavity. Depositing the prescribed fluid includes moving a first fluid delivery device through the quantity of the article-forming media while injecting the prescribed fluid through the first fluid delivery device into the quantity of the article-forming media.

Abstract: A tank seal for use in cast concrete walls has a generally cylindrical main body portion with a stepped outside wall having first axially-extending portion, a second axially-extending portion having an outermost diameter less than an outermost diameter of the first axially-extending portion, and a radial ledge or step separating the first and second axially-extending portions. A wiper blade portion extends radially inwardly of the stepped outside wall, from an end of the second axially-extending portion opposite the radial ledge, terminating at a third end. A circular membrane or web extends across the third end, including at least one annular groove therein to facilitate removal of at least one circular portion of the web. The radial ledge collapses and the first axially-extending portion puckers in response to compressive force exerted on the tank seal in an axial direction, reducing the axial length of the tank seal.

Abstract: A wall block having at least one weight bearing pad on an upper or lower surface of the block and a compression head and methods of making the block and making walls with the block.

Abstract: The present invention provides an improved building block formed of recycled straw stalks, a mold for forming the block, and a method of forming the block. The improved block provides a moisture and pest resistant building block having high dimensional tolerances and being capable of long term use without structural degradation.

Abstract: Described in this specification is a formula for a light weight flyash aggregate for concretes, as well as the method for producing the aggregate and the facilities needed to produce the aggregate. The compaction and bonding of the flyash is facilitated by essentially pure fine washed sands, with the presence of a binding agent that is a caustic soda solution.

Abstract: A method and an apparatus for casting concrete products substantially with a horizontal slipforming process, the concrete mass in said method being fed by means of at least one feed element (2) through a limited cross section (13, 7, 8) for forming a concrete product, whereby the feed elements (2, 5, 15, 16) produce a two-directional compacting motion for compacting the concrete mass.

Abstract: The problems to be solved by the invention are to provide a fiber reinforced cement composition for obtaining a fiber reinforced cement product which is excellent in bending strength, dimensional stability and installing property such as handling property, flexibility performance and nail performance, as well as a process for manufacturing the product. Namely, the fiber reinforced cement composition comprises the following raw materials: a hydraulic inorganic material, a siliceous material and a woody reinforcement, wherein the siliceous material is an inorganic hollow material and/or an inorganic spherical material and a finely dividing inorganic hollow material and/or a finely dividing inorganic spherical material. The effects of the present invention, it is possible to obtain a fiber reinforced cement product having good bending strength, dimensional stability and installing property such as handling property, flexibility performance and nail performance.

Abstract: This invention relates to pole structures used for supporting transmission and distribution lines, lighting and communications systems, highway signs, traffic signals, and the like. More specifically, this invention relates to a new and useful design of a multi-sectioned pole, with at least one telescoping upper section made of metal or another similar lightweight material and a base section composed of concrete or similar material that can be directly embedded into the ground without the need for baseplate-type foundations, or other preparatory work.

Abstract: A pocket former includes an outer barrel having a first rim, a second rim and a frustoconical body portion extending from the first rim to the second rim. A center barrel is connected to the outer barrel and has a proximal lip adjacent the first rim of the outer barrel, a distal lip adjacent the second rim of the outer barrel, and a tubular body portion extending from the proximal lip to the distal lip, and extends beyond both the first rim and the second rim. An annular flange curves out and away from the second rim of the outer barrel. A spiral surface is located on the frustoconical body portion of the outer barrel. A nut surface is located on the tubular body portion of the center barrel adjacent the distal lip.

Abstract: A reinforcing bar joint sleeve fixing device for fixing a reinforcing bar joint sleeve disposed in the interior of precast concrete to a molding form in fabricating a precast concrete structure with use of the molding form, which device permits both axial and radial positions of the reinforcing bar joint sleeve to be set positively and is employable repeatedly, the reinforcing bar joint sleeve fixing device comprises a cylindrical ring member disposed in the interior of a reinforcing bar joint sleeve, a plurality of slide pins fitted in an outer wall of the ring member so as to be slidable radially outwards, an elastic ring for pressing the plural slide pins radially inwards, a shaft formed of a head portion and a rod portion concentric with the head portion, the head portion being received in the interior of the ring member and having a conical shape which is larger in diameter toward axially the inside of the reinforcing bar joint sleeve, an insertion hole formed in the molding form for insertion therethrou

Abstract: The present invention relates to a fibrous construct which is used in providing cementitious mixtures supplemental and reinforcing strength upon setting, and more particularly, to a unitized fibrous construct which comprises a plurality of oriented reinforcing fibrous components, wherein the fibrous components can be cut to a predetermined and finite cut length upon formation and remain in a plural parallel form until such point the unitized fibrous substrate is incorporated and subjected to mechanical agitation during preparation of a cementitious blend or mixture.

Abstract: Pre-tension and post-tension processes for the manufacture of pre-stressed structures in which bonded carbon fiber cables are provided with burial anchors and temporary anchors outward of the burial anchors. The burial anchors are embedded in the structure. The temporary anchors enable stressing of the carbon fiber cables.

Abstract: In a method of constructing a rail track on a concrete slab, the concrete slab is poured around anchor members for fixing tie plates supporting the rails of the rail track. The method includes the following steps: suspending the rails premounted on their tie plates above the location at which the concrete slab is to be poured, each tie plate including a base under which is disposed a temporary tie plate for accurately guiding the anchor members, adjusting the position of the rails, pouring the concrete slab up to the height of the temporary tie plates, raising the rails and removing the temporary tie plates, and accurately positioning the rails premounted on their tie plates on the concrete slab in their final position and fixing the tie plates to the anchor members.

Abstract: A method of constructing a rail track in which a concrete track slab is produced and rail track anchor members are inserted in the track slab by an inserter system mobile along the route of the rail track includes the following steps: using a machine for continuously pouring concrete to produce two concrete walls laterally delimiting the edges of the track slab to be poured; pouring the concrete track slab between the walls; and using the inserter system to insert anchor members in the freshly poured track slab, the tie plate inserter system being adjusted accurately by a measuring station, topographical survey points, a measuring system, and reflectors carried by the inserter system.

Abstract: A method and apparatus are for fabricating a concrete product in a slip-form casting process, in which method concrete mix is fed into a slip-form mold of a defined cross section moving progressively in the casting process so as to obtain a concrete product of a desired shape. The method includes an interruptible guidance control of the prestressing tendons so as to allow the tendon guides to travel past supplementary parts such as reinforcing steels connected to the prestressing tendons.

Abstract: A method and apparatus is disclosed to prepare strand segments of predetermined length for use in a molded concrete product at an assembly facility. The strand segments are loaded into a strand reel (10) having multiple slots. The strand reel is then transported to the mold site. At the mold site, the strand segments can be simultaneously pulled out from the strand reel for placement in the mold.

Abstract: An apparatus is disclosed to feed strand (30) through apertures (214) in bearing plates (60) and bulkheads (202) in a mold (62). A collar (210) can be attached to a rod (208) for limited motion relative thereto, including rotation relative the rod about its elongate axis. The end (96) of the strand (30) is received in a cylindrical receptacle (232) in the collar and the strand can then be used to push the rod, collar and strand through the apertures. A strand feeder rack (56) can be used to simultaneously feed a number of strands.

Abstract: A dry cast article and method for making the same, wherein the dry cast article includes an oligomeric dispersant that is a reaction product of two or three moieties is provided. To make a dry cast article, hydraulic cement, water, coarse aggregate, fine aggregate, optionally a surface active agent/air entraining agent, and an oligomeric dispersant are mixed and used to form a dry cast article from the mixture.

Abstract: A method is disclosed to feed strand (30) through apertures (214) in bearing plates (60) and bulkheads (202) in a mold (62). A collar (210) can be attached to a rod (208) for limited motion relative thereto, including rotation relative the rod about its elongate axis. The end (96) of the strand (30) is received in a cylindrical receptacle (232) in the collar and the strand can then be used to push the rod, collar and strand through the apertures. A strand feeder rack (56) can be used to simultaneously feed a number of strands.

Abstract: A method for storing nuclear fuel in a container (10) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork (62) for the concrete body and supporting the fuel receiver within the formwork; placing the formwork in an immersed position in a pool (54) containing a body of water; placing concrete in the immersed formwork (62); and removing the formwork with the concrete body cast therein from the pool (52).

Abstract: A prestressed concrete casting apparatus includes a prestressing element (e.g., wire cable or rod) pretensioning fixture of simple easy to use construction, and great strength/rigidity for withstanding considerable pretensioning forces. Advantageously, a clamshell-type mold form may be used together with the pretensioning fixture, in such a manner that the mold form is easily properly locatable on the pretensioning fixture. The form can be removed for reuse without moving the pretensioning fixture or otherwise disturbing the casting, which is permitted to continue to cure in the stationary pretensioning fixture. Maintaining the pretensioning fixture stationary during the process lends greater structural integrity and stability to the pretensioning fixture under the considerable forces set-up by the pretensioning of the prestressing elements.

Abstract: A device (10) for storage of hazardous material, especially heat-producing hazardous material, such as radioactive spent nuclear reactor fuel, comprises a substantially cylindrical reinforced concrete body (12) and has an axially elongate storage space (18) for the hazardous material. A prestressed reinforcement (17) having reinforcing members (28, 29) extending helically about the storage space (18) is provided in the concrete body (12) adjacent to the outer side thereof. Preferably, the reinforcing members (28, 29) are divided into two groups, one inside the other, the hand of the reinforcing members (28) of one of the groups being opposite to the hand of the reinforcing members (29) of the other group. Also preferably, the ends of the concrete body are provided with end covers (15, 16) in which the reinforcing members (28, 29) are anchored.

Abstract: According to a post-tension process, carbon fiber bundles 13a, 13b, which extend from a straight carbon fiber cable 10, are folded and inserted in a sheath 21. U-shaped carbon fiber anchors 33 (burial anchors) are bonded to the folded part of the carbon fiber bundles 13a, 13b. After green concrete is aged to a hardened concrete body 23, the straight carbon fiber cable 10 is stretched by pulling tentative anchors 40a, 40b, and grout 22 is poured in the sheath 21. After the grout 22 is hardened, the straight carbon fiber cable 10 is released from tension by cutting off the tentative anchors 40a, 40b. Consequently, a concrete member 20 is pre-stressed due to shrinkage of the straight carbon fiber cable 10. According to a pre-tension process, a carbon fiber hoop is wound on and bonded to a plurality of straight carbon fiber cables, which are arranged parallel to each other. Green concrete is poured in a molding box under the condition that the straight carbon fiber cable are stretched.

Abstract: A method of constructing a rail track on a concrete slab, in which method the concrete slab is poured around anchor members for fixing tie plates supporting rails of the rail track, includes the following steps: suspending temporary tie plates at the location where the tie plates supporting the rail track are to be placed, the temporary tie plates supporting anchor members to be partly embedded in the concrete and including vents for evacuating air trapped under the bottom face of the temporary tie plate when pouring the concrete slab, pouring a concrete slab up to the height of the temporary tie plates, removing the temporary tie plates after the concrete slab has dried, and placing the tie plates supporting the rails accurately in their final position and fixing the tie plates to the anchor members.

Abstract: The invention relates to a method of manufacturing a reinforced oblong concrete product for longitudinal load-bearing purposes, in particular a driving pile. According to the present invention reinforcing fibers are used to prevent break-up of the concrete due to radial forces which occur during driving, and the concrete composition is provided with said reinforcing fibers before the concrete composition is applied to the reinforcing wire. This method reduces the amount of heavy labour and cost. The invention also relates to a driving pile comprising reinforcing fibers.

Abstract: In order to install or tension a brace (1) having a false bearing, for example a stay cable for a cable-stayed bridge, an external tensioning member or similar comprising a bundle of plastic-sheathed individual elements (2) made of steel, for example, wires, strands of wires or similar, the individual elements (2) are exposed in the area of the anchoring in order that they may be anchored at this point in holes (6) in an anchoring plate (7) which is supported by the building structure (9) by means of wedges (5). In order to ensure that when the strand is anchored the remaining plastic jacket (4) ends as close as possible to the anchoring plate (7), it is suggested that the plastic jacket be prevented from making any longitudinal movement during the extension of each individual element (2) which occurs during tensioning by a stop in the form of an annular shoulder (6d) which surrounds the element (2) in the anchoring area, and thereby compressed.

Abstract: A method and apparatus is disclosed to feed strand (30) through apertures (214) in bearing plates (60) and bulkheads (202) in a mold (62). A collar (210) can be attached to a rod (208) for limited motion relative thereto, including rotation relative the rod about its elongate axis. The end (96) of the strand (30) is received in a cylindrical receptacle (232) in the collar and the strand can then be used to push the rod, collar and strand through the apertures. A strand feeder rack (56) can be used to simultaneously fed a number of strands.

Abstract: The present invention comprises a method for the manufacture improved structural panel with synthetic ingredients, such as vermiculite and fibers. The improved structural panel achieves enhanced lateral and surface integrity by the use of fibers within the core of the structural panel and adhesives and smooth materials (such as foil) as a surface coating. The method is particularly suited for manufacture of the structural panel at low cost and high efficiency.

Abstract: A method and apparatus is disclosed to feed strand (30) through apertures (214) in bearing plates (60) and bulkheads (202) in a mold (62). A collar (210) can be attached to a rod (208) for limited motion relative thereto, including rotation relative the rod about its elongate axis. The end (96) of the strand (30) is received in a cylindrical receptacle (232) in the collar and the strand can then be used to push the rod, collar and strand through the apertures. A strand feeder rack (56) can be used to simultaneously fed a number of strands.

Abstract: Apparatus for the manufacturing of prestressed reinforced concrete railroad ties and the like in which the apparatus consists of an elongated spine or compression member which has no foundation but rather is independent of the supporting surface upon which it rests. In one version of the apparatus two bridge members confront the opposite ends of the spine and permanent tension resisting members pass beneath the spine from end to end of the spine and are attached to the lower ends of the bridge members. In another version two structural members are embedded in the concrete of the spine and protrude to provide terminal members.

Abstract: A method for the production of prestressed concrete products and a plant for implementing the method. Moulds provided with pretensioned wires are moved through fixed casting machines into a hardening space. In the hardening space, the combination of mould and product is lifted sideways from the casting line before hardening, using synchronised lifting equipment. The combinations may be stacked for space economy. After hardening, the product is removed from the mould using the same lifting equipment. The moulds are returned to the beginning of the casting line, during which stage they are cleaned and refurnished. The products are transferred to cutting and finishing stations.

Abstract: A method and apparatus is disclosed to prepare strand segments of predetermined length for use in a molded concrete product at an assembly facility. The strand segments are loaded into a strand reel (10) having multiple slots. The strand reel is then transported to the mold site. At the mold site, the strand segments can be simultaneously pulled out from the strand reel for placement in the mold.

Abstract: Long carbon fibers f0 are stretched between a couple of anchor-installing bases 40L, 40R. Continuous carbon fibers f are drawn out of a reel 34 on a carrier 30 and helically wound around the stretched long carbon fibers f0, by combination of rotation of the stands 40L, 40R with unidirectional travel of the base 30. A reinforcing element composed of the long carbon fibers f0 and the continuous carbon fibers f is set in a molding box 60, and fresh concrete is cast from a tank 62 in the molding box 60. Since the stretched reinforcing element is embedded in cured concrete, a fabricated concrete member is very strong with high reliability on quality and performance.

Abstract: Parallel spaced shallow grooves are cut within the surface of an existing reinforced concrete member in the direction of bending and at locations where existing tensile reinforcing is inadequate. A curable polymer adhesive resin, such as an epoxy resin, is inserted into each groove and an elongated fiber reinforcing element, such as a composite rod with continuous carbon fibers, is positioned within each groove, substantially filling the groove, so that the minimum volume adhesive resin surrounds the reinforcing element. The adhesive resin within each groove is formed flush with the surface and allowed to cure to bond each reinforcing element to the concrete defining the groove. The grooves and reinforcing elements extend within the top surface of a concrete slab across a beam or support for the slab, extend within the bottom surface of the slab at least fifty percent of the distance between adjacent supports for the slab, or within a vertical surface of a concrete or masonry wall or column.

Abstract: A prestressed pavement has apparatus to prestress the slabs, has slab abutments to resist the prestress force, has short-life friction-reducing medium to prevent the slab early cracking, has restraints to prevent the slab buckling, and has accumulators to control the prestress. The pavement does not need longitudinal tensile material, and can be built by continuous and one-time concrete casting. The prestressing is simple, fast, and may be delayed or made by stages. The techniques can be used to convert existing non-prestressed concrete pavements to prestressed pavements.

Abstract: A thermosetting resin composition for prestressed concrete tendon, wherein the composition does not harden until the completion of the straining of the tendon, which is the inherent object in the post-tension technique, even if the heat storage temperature in the concrete structures elevates from 30° C. to 80° C. or higher due to heat of hydration reaction in setting a concrete, particularly 95° C. that is the maximum temperature in solidifying a concrete, and the composition including the site of 30° C. or lower where there is substantially no partial heat storage due to heat of hydration reaction in setting the concrete hardens within the prescribed period of time under spontaneous environmental temperature after the subsequent natural cooling, thereby achieving anti-rust and anti-corrosion of the tendon and also adhesion and integral bonding of the tendon and the concrete, a use method thereof and a prestressed concrete tendon.

Abstract: A method for a variable manufacture of concrete railroad ties, with or without prestressed reinforcement, is provided wherein molds are cleaned in a preparation station and provided with the reinforcements, and are subsequently filled with concrete in a concreting and shaking station. Then the railroad ties are cured by a heat treatment. All railroad ties are produced in multiple molds, preferably in quadruple molds having identical dimensions, and the heat treatment is carried out in heating chambers. The heating chambers are loaded and unloaded with the concrete-filled molds by means of a shelf servicing device, which also supplies the molds to a stress relieving and emptying station which leads to the preparation station. Furthere provided is an apparatus for implementing this method.

Abstract: Methods and apparatus for the manufacturing of prestressed reinforced concrete railroad ties in which the apparatus consists of an elongated spine or compression member which has no foundation but rather is independent of the supporting surface upon which it rests. In one version of the apparatus two bridge members confront the opposite ends of the spine and permanent tension resisting members pass beneath the spine from end to end of the spine and are attached to the lower ends of the bridge members. In another version two structural members are embedded in the concrete of the spine and protrude to provide terminal members.

Abstract: A filled structure includes a fiber reinforced resinous hollow structure having a tensile strength of at least 30,000 psi, and an inside surface forming a boundary which defines a space. A hard core is provided within the space. The hard core has a density of at least 35 pounds per cubic foot and a compressive strength of at least 1500 psi. The hard core is formed from a mixture of particulate cementitious material and liquid. At least one tendon under stress is provided in the hard core. The tendon is constructed and arranged to exert permanent stress on the hard core.

Abstract: A synthetic wood material and method are disclosed, including providing a plurality of continuous glass fibers oriented substantially in the longitudinal axis and coated with a resorcinol modified phenolic resin binder substantially free from catalyst. In one aspect, the synthetic wood material is oxidatively treated to restore color. In one aspect, the fibers and binder are precoated with a furfuryl alcohol resin prior to the pultrusion step to form the synthetic wood.

Abstract: An anode is embedded in an electrolyte layer applied to the surface of a structure such as a pipe section to provide an ionic conductive path between the anode and structure to supply cathodic protection to the structure, where the natural environment may not provide a continuous electrolyte. The anode is comprised of a material normally used as a cathodic protection anode material, such as, an expanded valve metal mesh or ribbon having either an electrochemically active coating or noble metal coating, or a sacrificial anode metal alloy. The anode material is made continuous from one end of the structure to the other and may be connected to a common bus wire from one end to the other. The anode and structure to be protected are connected using wires to a DC power supply that causes cathodic protection current flow to the structure in the case of an impressed current system. No separate power supply is needed in the case of a galvanic or sacrificial anode system.

Abstract: A vent flow apparatus and method for general application in venting and filling air pockets in conduit or duct type apparatuses designed for passage of material therethrough is provided including a hollow vent flow conduit preferably in the form of a tube having an entry opening and a downstream exit opening with both openings being in communication with a duct for flow of material therethrough. The entry opening is in communication with the duct at a first location of greater cross-sectional area of the duct than a second location of communication of the exit opening with the duct. The vent flow conduit has particular applicability for post-tensioning systems for concrete or other suitable structures, particularly post-tensioning systems which include body sections interconnected in series by an intermediate anchor head and which use a transfer means for routing grout between the body sections and around the intermediate anchor head.

Abstract: Concrete strengthening members, particularly prestressing tendons such as strands of steel wire, are provided with a strongly adherent plastic coating which may be substantially impermeable for improved corrosion resistance, and/or which may have embedded therein abrasive or grit-form particles to provide improved bond with the concrete, and particularly to provide controllable bond transfer in prestressing tendons of the pre-tensioned type. The plastic coating preferably is applied electrostatically in powder form, and fusion bonded by heat. The abrasive can be applied by spraying during a viscous state of the heated resin, and can be varied as to size and spacing density so as to control the surface condition and the bonding effect. Fusion and curing heat may come from preheating of the member before application of the resin powder, which preferably is a heat curable, thermosetting epoxy. Coating thickness and grit application are readily variable to meet particular requirements.

Abstract: A mold bed for fabricating pre-stressed concrete elements has a mold frame (8) that extends between the ends of the bed. Tensioning heads are mounted at the bed ends for tensioning reinforcement ropes or lines (10) extending in the mold cavity. The mold frame (8) includes longitudinally extending beam elements (4) that take up pressure forces which constitute counter-pressure forces that are generated by the tension forces that are taken up by the tensioning heads when tensioning the ropes. These beam elements have the form of long bars (4), e.g., bars of rectangular profiles, that are surrounded by continuously or discontinuously extending sleeve elements (5). The bars (4) are therewith prevented from buckling or breaking sideways as a result of the pressure forces generated by the tension in the ropes (10). The sleeve elements (5) are stiffened by means of anchoring devices (14) that engage in the underlying surface.

Abstract: An improved post tensioning system for prefabricated building panels in which a concentric uniform radial compression is maintained in the slab. A post tensioning cable is placed in the concrete slab to form a perimeter loop starting from one corner of the slab to a point where the cable entered the slab and at a point turning 90.degree. to follow that portion of the cable in the periphery to a point midway up the Y axis and then turning 90.degree. across the X axis to bisect the slab and cross the opposite parallel portion of the cable to exit out the adjacent side of the slab. This creates a cable pattern with no less than 2.5 parallel cables in any direction.

Abstract: A road transportable concrete railroad long-line tie molding system is described in which a rigid horizontal metal stressing frame is assembled from transportable sub-frame segments. The sub-frame segments are releasably connected in axially aligned end-to-end relation, and include parallel longitudinal reaction members. In a preferred form, the sub-frame segments are convertible from inoperative transport conditions to extended operative conditions. Footings are provided along the stressing frame length to engage the sub-frame segments to releasably mount the sub-frame segments in axial alignment and stabilize the reaction members against lateral deflection during compressive loading. A plurality of conventional gang tie molds having upwardly open elongated mold cavities are releasably received in end-to-end alignment along the framework. A reinforcing wire anchor is provided on the sub-frame at the dead end of the framework and a tensioner is located at the live end of the framework.