A drilling machine for boring holes in a slab having a hole formed therein includes a main frame to which a drill gang assembly is rotatably and telescopingly mounted. The drill gang assembly includes a drill support frame supporting a plurality of drills in parallel spaced alignment. The drill gang assembly is mounted on a mast which may be rotated three hundred and sixty degrees relative to the main frame about a vertical axis up to at least one hundred and eighty degrees. The mast slides laterally relative to the main frame and the wheels supporting the main frame telescope laterally so the wheels can be supported on an adjacent lane or shoulder when the drill gang assembly is supported over a hole extending the width of a lane of a road forming by the slab.

A method for repairing a paved road comprises forming a repair section by removing a damaged part of a concrete pavement or an asphalt pavement, and repairing by shooting in the repair section rapid-set blended concrete wherein concrete having improved fluidity as a result of mixing normal concrete having compressive strength of 21-30 MPa with bubbles of 20-40% of the volume of the normal concrete is mixed with a high-early-strength mixture material; and high-performance rapid-set blended concrete wherein a high-early-strength mixture material and a high-durability mixture material are mixed together.

A drilling machine for boring holes in a surface includes a main frame to which a drill gang assembly is rotatably and telescopingly mounted. The drill gang assembly includes a drill support frame supporting a plurality of drills in parallel spaced alignment. The drill gang assembly is mounted on a mast which may be rotated relative to the main frame about a vertical axis up to at least one hundred and eighty degrees. The drill gang assembly is also pivotally mounted relative to the mast to permit pivoting of the drill support frame and attached drills about a horizontal axis.

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.

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.

Systems and methods for performing repairs to a longitudinal joint are disclosed. In certain methods, a pavement surface having a longitudinal joint formed by two adjacent pavement passes is disclosed. Milling out a section of a substrate that comprises the longitudinal joint is also disclosed. Also disclosed is applying a void reducing asphalt membrane to the surface of the milling slot. Hot mix asphalt may be used to fill milling slot with void reducing asphalt membrane applied.

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.

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.

A concrete dowel tube made of carbon steel comprises a welded longitudinal seam.

A system and method for applying a construction material is provided. The method may include mixing blast furnace slag material, geopolymer material, alkali-based powder, and sand at a batching and mixing device to generate a non-Portland cement-based material. The method may also include transporting the non-Portland cement-based material from the mixing device, through a conduit to a nozzle and combining the transported non-Portland cement-based material with liquid at the nozzle to generate a partially liquefied non-Portland cement-based material. The method may further include pneumatically applying the partially liquefied non-Portland cement-based material to a surface.