The present invention relates to a high-toughness geopolymer grouting material modified by ultra-high molecular weight fibers and emulsified asphalt, and a preparation method and application thereof, wherein the grouting material comprises the following components in parts by mass: 4-12 parts of emulsified asphalt, 80-100 parts of a geopolymer, 103-126 parts of an alkali-activated solution, 2-3 parts of ultra-high molecular weight fibers and 30-35 parts of water. Compared to the prior art, the grouting material modified by ultra-high molecular weight fibers and emulsified asphalt is simple to prepare, has good fluiditygood, and matches well with road substrate; the good toughness and crack control capability of the ultra-high molecular weight fibers enables this novel grouting material to overcome the problem in durability of common geopolymer-based materials. The material of the present invention can be applied in filling voids beneath a slab of a cement concrete pavement and in the technology of non-excavation road reinforcement of a road base course and a subgrade of a high-grade highway.

A method of using a flowable binder for construction or repair comprises providing a binder mixture including an alkali metal silicate, fly ash, slag, and added water, where a total water-to-solids mass ratio of the binder mixture is in a range from about 0.2 to 0.5. The binder mixture is mixed together with inert particles to form a flowable mortar. The flowable mortar is distributed over a bed of coarse aggregate, and the mortar seeps into interstices of the coarse aggregate. Upon curing, a composite comprising reinforcement material embedded in a cured binder is formed.

A composition and method of repairing damaged concrete and asphalt surfaces includes a two-part polymer resin mixture. To effectuate a repair, the damaged portion is cleaned of debris and loose pieces. The two-part polymer resin mixture is mixed onsite and is applied as a protective overlay over the damaged portion. Once cured, the mixture provides a protective layer over the damaged area.

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. Methods for making the compositions are also disclosed.

Embodiments of a dry mix for producing a concrete composition are provided. The dry mix includes aggregate, cement, and bed ash. The bed ash contains the combustion product of a fluidized bed coal combustion reaction. Additionally, embodiments of a method of preparing the dry mix and embodiments of a method of preparing a concrete composition are provided. The dry mix is also suitable for repairing soil slips, and embodiments of a method of repairing a soil slip are also provided.

The present disclosure provides various aspects for mobile and automated processing utilizing additive manufacturing and the methods for their utilization. In some examples, discrete material formats for use in an Additive Manufacturing Array are disclosed. Methods of using the additive manufacturing robot, discrete materials, and the roadways produced with the additive manufacturing robot are provided. A combined function Addibot, with Additive Manufacturing capabilities, cleaning capabilities, line painting capabilities and seal coating capabilities which may be used in concert with a camera equipped aerial drone for design and characterization function is described.

Various embodiments provide a concrete slab joint stabilizer including an expandable housing including a cylinder defining a slit running along its longitudinal length, the expandable housing having a housing axis extending longitudinally there through, and an expander configured to expand the expandable housing in directions perpendicular to the housing axis. The concrete slab joint stabilizer is configured to limit relative vertical displacement between two adjacent concrete slabs.

Methods, compositions and systems for prolonging the lives of transportation surfaces, including pavement, runways, bridges and parking structures include chemically protecting the transportation surfaces. Chemical protection may be accompanied by physical alteration of the transportation surface, which may enhance one or both of a microtexture and a macrotexture of the transportation surface.

A restoration system which is used to restore brick, glass, concrete, metal, plexiglass, and stone to their original color and preserve the materials. The restoration system includes a treatment composition overlay including a first-dry-part, a second-dry-part, a first-liquid-part, and a second-liquid-part. The first-dry-part is an acrylic based dry polymer. The second-dry-part is an acrylic based dry hardener. The first-liquid-part includes polymeric resin, water, acrylic polymer, and sodium. The second-liquid-part includes acrylic resin, water acrylic polymer, aqueous ammonia, and additives. The first-dry-part, the second-dry-part, the first-liquid-part, and the second-liquid-part are configured to be mixed to create a treatment composition overlay for restoring and preserving at least one surface.

A portable paving material mixing apparatus includes a material hopper, a rotatable mixing drum, and a discharge bed, all configured to be supported on a vehicle trailer. A burner heats material within the mixing drum. Embodiments of the mixing apparatus include a rejuvenator application system suitable for hot mix asphalt, cold mix asphalt, hot in-place recycling, and asphalt based concrete mixing. The apparatus rapidly processes a batch of material sufficient to fill 5-7 potholes, has sufficient carrying capacity to process multiple mixer batches, and stores prepared material in the discharge bed while the next batch is being prepared in the mixing drum. The apparatus enables a more efficient, less equipment-intensive paving repair process without the need for a separate millings loader or hot box.