Asphalt additive compositions and methods of making and using thereof

    公开(公告)号:US11142667B2

    公开(公告)日:2021-10-12

    申请号:US16588177

    申请日:2019-09-30

    摘要: A composition useful as an asphalt additive includes a plurality of substrate particles and a coating layer disposed on the particles, the coating layer including a solid elastomer. A method of producing an asphalt additive includes mixing an emulsion comprising an elastomer with a plurality of substrate particles. Another composition useful as an asphalt additive includes a plurality of substrate particles substantially coated with a first coating layer and a second coating layer, the first coating layer including a solid elastomer. An asphalt mix includes the asphalt additive composition, aggregate, and a binder.

    METHOD FOR PREPARING HOT-MIXED ASPHALT MIXTURE

    公开(公告)号:US20210114932A1

    公开(公告)日:2021-04-22

    申请号:US16989479

    申请日:2020-08-10

    申请人: Tongji University

    摘要: The present invention provides a method for preparing a hot-mixed asphalt mixture, and relates to the technical field of road engineering. In the present invention, asphalt and aggregates are preheated separately, where the aggregates include coarse aggregates and fine aggregates; the coarse aggregates, part of the fine aggregates and asphalt that are preheated are subjected to a first mixing to obtain a first mixture; the remaining fine aggregates are added to the first mixture for a second mixing to obtain a second mixture; and a mineral powder is added to the second mixture for a third mixing, and discharging is conducted to obtain a hot-mixed asphalt mixture.

    Patch and crack sealing device and assembly

    公开(公告)号:US10982398B1

    公开(公告)日:2021-04-20

    申请号:US16546507

    申请日:2019-08-21

    申请人: Douglas Williams

    发明人: Douglas Williams

    摘要: Patch and crack sealing devices, assemblies, and methods. In one embodiment, a device for surface repair includes an application arm having a torch heating element and an interconnect end adjacent the torch heating element. The device may include at least one applier. In particular embodiments the applier is an interchangeable applier removably coupled to the interconnect end. The result may be an improved device and method for applying/manipulating a polymer asphalt binder and construction aggregate composition at a proper application temperature.

    RECYCLED ASPHALT COMPOSITIONS AND METHODS THEREOF

    公开(公告)号:US20210079599A1

    公开(公告)日:2021-03-18

    申请号:US17104738

    申请日:2020-11-25

    发明人: John Corcoran

    摘要: A pavement composition includes a recycled hot mix asphalt (HMA) sheet mix composition including more than 50% and up to 100% recycled fines mixed with a rejuvenating agent. The recycled fines of the HMA sheet mix are separated from a reclaimed asphalt pavement (RAP) composition and substantially all of the recycled fines are capable of passing through a sieve having an opening size of ⅜ inch (9.5 mm). Pavement systems include an existing pavement layer and a thin-lift overlay made of the recycled HMA sheet mix on the existing pavement layer. Pavement systems also include a three-layer system including a leveling course layer, an interlayer, and a surface course layer in which the leveling course layer and/or the surface course layer include a recycled HMA sheet mix composition.

    Asphalt composition for road pavement

    公开(公告)号:US10934434B2

    公开(公告)日:2021-03-02

    申请号:US16071316

    申请日:2017-01-18

    摘要: Asphalt composition for road pavement, excellent in drying strength, strength after immersion in water, and strength after immersion in petroleum, method for producing same, and road paving method. Composition comprises asphalt, polyester, and aggregate. Polyester has alcohol component-derived constituent unit containing ≥65 mol % bisphenol A/alkylene oxide adduct and carboxylic acid component-derived constituent unit containing ≥50 mol % terephthalic or isophthalic acid. Composition has softening point of 95°−130° C., hydroxyl group value of 20-50 mgKOH/g, and ratio of polyester resin of 5-50 parts by mass based on 100 parts by mass of the asphalt. Production method comprising mixing asphalt, the polyester, and aggregate at 130-200° C. for ≥30 seconds. Polyester resin is mixed in ratio of 5-50 parts by mass based on 100 parts by mass of asphalt. Road paving method comprises laying asphalt composition obtained by production method as set forth, thereby forming an asphalt paving material layer.