An asphaltic sheet comprising an asphaltic component including an asphalt binder and expandable graphite.

Methods are provided for predicting the properties of an asphalt fraction that contains two or more asphalt components based on measurements of the viscosity versus temperature profile for the components of the asphalt fraction. The viscosity versus temperature profile for each component can be used to determine characteristic (such as limiting) values for the viscosity and temperature for a component. Based on this ability to determine characteristic values for an asphalt blend based on the properties of individual blend components, appropriate blends of asphalts can be selected in order to arrive at an asphalt blend with desired properties.

Asphalt-based compositions that contain little or no VOCs. The compositions are particularly useful for roofing applications, including as plastic roofing cement, flashing cement, roof coatings, and primers. The compositions include asphalt, a VOC-free solvent, a surfactant and clay. The compositions may also include fibers, technical or functional fillers, and a wet surface adhesion additive. The compositions may further include aluminum flakes for enhanced durability, strength, reflectivity and colorants for enhanced appearance.

A method for continuously producing a mat of cellulose fibers intended for producing roofing elements made from bitumen-impregnated cellulose fibers, from a dilute slurry of cellulose fibers spread by a headbox on a dewatering fabric of a forming table having a predefined width, the dewatering fabric moving between an inlet of the forming table at the headbox side and an outlet of the forming table, moving the dilute slurry towards the outlet, gradually removing the liquids of the dilute through the dewatering fabric during the movement to obtain, at the outlet, the mat having a thickness of at least 2 mm, the dilute slurry having a certain level of pre-existing mineral materials. The method involves adding mineral material to the cellulose fibers by spraying a controlled quantity of aqueous solution or dispersion of mineral fillers over the width of the forming table onto the surface of the dilute slurry.

The present invention relates to relates to a method of producing an improved asphalt. This method includes providing an asphalt binder and providing a compound of formula (I):

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as described herein. The asphalt binder is mixed with the compound of formula (I) under conditions effective to produce an improved asphalt. Also disclosed are an asphalt product and a method of making asphalt material.

A method for regenerating asphalt and/or bitumen containing debris, which allows to recycle more bulk material and optionally binding agents.

An object of the instant application is to provide a process of recycling a bituminous product such as a waste bituminous membrane product optionally containing reinforcement layers comprising grinding and melting steps.

An improved method forms and employs a wax to modify asphalt. The method includes: (a) selecting a solid polymeric material, (b) heating the solid polymeric material in an extruder to produce a molten polymeric material, (c) filtering the molten polymeric material, (d) placing the molten polymeric material through a chemical depolymerization process in a reactor to produce a depolymerized polymeric material, and (e) adding the depolymerized material to a pre-wax mixture to produce a polymer-modified asphalt. The addition of wax reduced the mixing time necessary to achieve improved polymer dispersion compared to the control formulation modified bitumen and reduced the viscosity of the neat bitumen. Pre-polymer addition of wax is detrimental to most properties of the resulting modified asphalt. Post-polymer addition improved viscosity reduction, higher softening point and improved dimensional stability.

The present technology relates to ultra-low VOC compositions comprising asphalt, a softener, clay, a surfactant and one or more polymeric adhesives. The compositions may optionally include functional fibers, fillers and other additives. The present technology also includes methods of manufacturing such compositions and methods for using such compositions in coating, sealing, waterproofing and other applications.

This invention encompasses rubber modified asphalt cement compositions, as well as systems, apparatuses, methods for preparing, as well as methods for using rubber-modified asphalt cement compositions.