Terre Haute, IN, United States
Terre Haute, IN, United States

Time filter

Source Type

Patent
Road Science Llc | Date: 2010-06-23

A device for breaking up compressed masses of fibers into pieces of fiber and transporting the pieces of fiber, comprising: an intake chute; a plurality of break-up implements mounted on a plurality of shafts rotatably mounted within the intake chute; a plurality of devices with protrusions, where the plurality of devices are mounted on a plurality of shafts rotatably mounted within the intake chute; and a transportation device. A compressed mass of fibers may be placed within the intake chute, the compressed mass of fibers may come into contact with the plurality of break-up implements, the compressed mass of fibers may be broken into large pieces of fiber by the break-up implements, the larger pieces of fiber may come into contact with the plurality of devices, the larger pieces of fiber may be broken into small pieces of fiber by the devices, and the small pieces of fiber may fall onto the transportation device.


Patent
Road Science Llc | Date: 2011-04-26

A method of applying a new surface to an existing surface. The method comprises applying a bituminous emulsion bonding layer to the existing surface; destabilizing the bituminous emulsion bonding layer; and applying a bituminous mixture to the bituminous emulsion bonding layer.


A method of selecting a crack resistant layer to be applied to an existing surface, the method comprising the steps of: selecting at least one bituminous binder to examine, where the bituminous binder comprises bitumen and one or more polymers, where the one or more polymers include a sufficient amount of conjugated diene such that at least 2.5% of the bituminous binders weight comprises conjugated diene, preferably at least 3.0%, more preferably at least 3.5%, and most preferably 4.0%; forming at least one bituminous mixture comprising the bituminous binder and an aggregate; testing each bituminous binder for binder fracture energy properties; and selecting a bituminous binder for use in the crack resistant layer. The method may further comprise the steps of testing the bituminous mixture for fatigue properties and selecting the bituminous binder for use in the crack resistant layer based on fatigue properties and binder fracture energy properties, and/or testing the bituminous mixture for fracture energy and selecting the bituminous binder for use in the crack resistant layer based on mixture fracture energy properties and bituminous binder fracture energy properties.


Patent
Road Science Llc | Date: 2010-10-27

A composition for use in a fiber modified layer, comprising an aggregate material, a binder, and a plurality of fibers, wherein each fiber has a length of greater than 0.25 inches. Also provided is a method of selecting a fiber modified layer for applying on an existing surface, comprising the steps of: providing a binder mixture having an effective amount of an aggregate material, a binder, and a plurality of fibers, wherein each of the plurality of fibers has a length greater than 0.25 inches; applying the binder mixture to a selected surface to form a fiber modified proposed layer; testing the fiber modified proposed layer for fatigue or crack resistant properties; and selecting the binder mixture for application on the existing surface for performance if the fiber modified proposed layer has fatigue or crack resistant properties.


Patent
Road Science Llc | Date: 2011-01-20

The invention is a foamed bituminous emulsion comprising a bituminous emulsion and vapor entrained within the bituminous emulsion, such that the foamed bituminous emulsion is a frothy mass of foam. The temperature of the foamed bituminous emulsion may be less than 100 C., less than 75 C., or less than 50 C. The vapor entrained within the bituminous emulsion may have a volume greater than 5%, 25%, or 50% by volume of the volume of the bituminous emulsion. The foamed bituminous emulsion may be combined with paving materials to produce a foamed bituminous emulsion paving mixture. A layer may by produced by forming a bituminous emulsion; foaming the bituminous emulsion to produce a foamed bituminous emulsion, where foaming the bituminous emulsion comprises causing vapor to become entrained within the bituminous emulsion; combining the foamed bituminous emulsion with paving materials to produce a paving mixture; and applying the paving mixture to an existing surface to form a new surface. The method may further comprise compacting the new surface. The paving mixture may have a temperature less than 100 C., less than 75 C., or less than 50 C. when applied to the existing surface.


Patent
Road Science Llc | Date: 2010-11-18

A design method for making a bituminous mixture that is used to form a vapor-permeable layer of pavement is provided. This design procedure includes preparing one or more bituminous mixture test specimens, measuring the performance of these specimens, and selecting a desirable bituminous mixture for paving that is vapor-permeable based on the performance of the specimens. Another aspect of the present invention is the selected bituminous mixture, which includes aggregate and a bituminous binder. The aggregate may be selected such that no more than about 5% by mass of the aggregate and preferably no more than about 3.5% by mass of the aggregate is able to pass through a 75 m sieve. The selected bituminous mixture may have an Air Permeability Value that is at least about 8 cm^(2 )so as to reduce its propensity for blistering during and after construction. Still further, the selected bituminous mixture may have desirable fatigue resistance and may be substantially water-impermeable.


Patent
Road Science Llc | Date: 2010-06-29

A composition for use in a fiber modified layer, comprising an aggregate material, a binder, and a plurality of fibers, wherein each fiber has a length of greater than 0.25 inches. Also provided is a method of selecting a fiber modified layer for applying on an existing surface, comprising the steps of: providing a binder mixture having an effective amount of an aggregate material, a binder, and a plurality of fibers, wherein each of the plurality of fibers has a length greater than 0.25 inches; applying the binder mixture to a selected surface to form a fiber modified proposed layer; testing the fiber modified proposed layer for fatigue or crack resistant properties; and selecting the binder mixture for application on the existing surface for performance if the fiber modified proposed layer has fatigue or crack resistant properties.


The present invention relates to a method for applying a crack resistant coating on a surface, where the crack resistant coating increases resistance to high vertical and horizontal movements and high shear stresses on the surface. The method comprises the steps of applying a binding material to the surface and applying an aggregate mixture within 15 seconds of applying the binding material to the surface, where the aggregate mixture comprises aggregate particles and an asphalt solution and where the aggregate mixture has a plurality of air voids, and where the binding material fills at least 15% of the air voids in the aggregate mixture (AVFA).


The present invention relates to a method for applying a crack resistant coating on a surface, where the crack resistant coating increases resistance to high vertical and horizontal movements and high shear stresses on the surface. The method comprises the steps of applying a binding material to the surface, applying an aggregate mixture within 15 seconds of applying the binding material to the surface, and allowing the binding material to fill some of the air voids in the aggregate mixture to form a substantially voidless layer with a height of at least 0.38 cm.


Patent
Road Science Llc | Date: 2011-08-25

A method of selecting a fiber modified layer for applying on an existing surface, comprising the steps of: providing a binder mixture having an effective amount of an aggregate material, a binder, and a plurality of fibers, wherein each of the plurality of fibers has a length greater than 0.25 inches; applying the binder mixture to a selected surface to form a fiber modified proposed layer; testing the fiber modified proposed layer for fatigue or crack resistant properties, where testing the fiber modified proposed layer for fatigue or crack resistant properties comprises using a Modified Disc Compact Tension Test in accordance with Modified ASTM D7313-07; and selecting the binder mixture for application on the existing surface for performance if the fiber modified proposed layer has fatigue or crack resistant properties.

Loading Road Science LLC collaborators
Loading Road Science LLC collaborators