4 results about "Asphalt mastic" patented technology

This invention relates to the field of road engineering, specifically to a method for identifying the asphalt-mineral powder interface transition zone based on a dynamic shear rheometer. The method includes: preparing an asphalt-trichloroethylene solution; preparing asphalt mastic and separating free asphalt based on the asphalt-trichloroethylene solution and filtered mineral powder; performing a first elution on the asphalt mastic to obtain an asphalt sample; repeating the asphalt mastic elution process n times; determining the asphalt film thickness of each asphalt sample; conducting a dynamic shear rheological test on each asphalt sample; calculating and plotting the complex shear modulus master curve based on the complex shear modulus, the time-temperature equivalence principle, the WLF equation, and the CAM model; identifying the first asphalt sample whose complex shear modulus master curve shows a significant change trend relative to the previous eluted sample, and obtaining the asphalt-mineral powder interface transition zone thickness based on the asphalt film thickness of the asphalt sample with the significant change trend. This invention accurately identifies the thickness of the asphalt-mineral powder interface transition zone.

The present application relates to an electrically conductive asphalt mastic (ECAM) composition that includes an asphalt binder, a mineral filler, and a plurality of conductive carbon microfibers, between 3 and 12 mm in length, which are the sole source of electrical conductivity in the ECAM composition where the conductive carbon microfibers and the mineral filler are dispersed in the asphalt binder, and wherein said conductive carbon microfibers are present in the ECAM composition in an amount of less than 2.00% of total volume of the ECAM composition. The application further relates to an electrically conductive asphalt concrete (ECAC) composition that includes an asphalt binder, a mineral filler, an aggregate, and a plurality of conductive carbon microfibers, where the conductive carbon microfibers are the sole source of electrical conductivity in the electrically conductive asphalt concrete composition.

This invention discloses a testing device and method for asphalt mastic adhesive samples, belonging to the field of engineering material testing technology, and can solve the problem that the adhesive properties of asphalt mastic cannot be specifically tested. The device includes: an adhesive strength tester, a steel plate, an asphalt mastic sample, and a pull-out block stacked sequentially from bottom to top. The pull-out block includes a pull-out base and a pull-out head; the pull-out base is located on the asphalt mastic sample; the adhesive strength tester is connected to the pull-out head and is used to test the adhesive sample. This invention can quantitatively evaluate the adhesive properties of asphalt mastic, including adhesive strength and failure type, providing a reliable basis for product development and quality control in the laboratory.

This invention relates to a method for preparing and using acid-etched modified copper slag powder suitable for asphalt mastic. The invention aims to address the technical problems of existing methods for modifying copper slag powder for asphalt mastic, which are cumbersome, energy-intensive, and difficult to apply industrially. This invention selectively dissolves the iron oxide and iron silicate mineral phases on the surface of copper slag with dilute sulfuric acid, creating a rough, uneven microstructure on the surface of the copper slag particles. This significantly increases the specific surface area and interfacial contact area, thereby enhancing the mechanical interlocking and interfacial bonding with asphalt, effectively improving the high-temperature deformation resistance of asphalt mastic, and simultaneously realizing the resource utilization of industrial solid waste copper slag, possessing both environmental and practical value. The method of this invention is simple, easy to operate, requires no complex equipment, and can achieve industrial-scale mass production.