The present disclosure provides a concrete structure strengthened using a grid reinforcement material and non-shrink grout and a method of strengthening the same in which, when strengthening a concrete structure such as a concrete slab or a concrete wall body that is damaged or deteriorated, a grid reinforcement material is mounted on one side of the concrete structure, a formwork is formed on an outer side of the grid reinforcement material to have a required gap, and then the gap is filled with non-shrink grout so that the non-shrink grout is cured therein to strengthen the old concrete structure, thereby being able to automatically fill and repair cracks formed in the concrete structure just by injecting the non-shrink grout without separately performing crack repair on the old concrete structure. Also, the grid reinforcement material may be easily fixed or mounted using a grid fixing device and may be easily applied to strengthening of a concrete structure having a curved surface as well as a concrete structure having a flat surface such as a concrete slab or a concrete wall body. In addition, reinforcing bars may be additionally arranged in a gap between a surface of the concrete structure and the grid reinforcement material so that the grid reinforcement material increases a cover thickness, and thus the concrete structure is remarkably strengthened.

The present invention provides a portable device for injecting repair material, the portable device comprising: a chassis frame; tanks storing source materials; pumping means pumping the source materials; an injection nozzle mixing the source materials and injecting repair material into cracks; source material supplying means including: operating blocks connected to the pumping means; supplying pipes connected to the operating blocks and supplied with the source materials; transferring pipes connected to the operating blocks and transferring the source materials into the injection nozzle, and a pressure controller connected to the transferring pipe and controlling the source materials, wherein check valves for preventing backflow are installed inside the transferring pipes, wherein by adjusting another check valve connected to the pressure controller, an amount of the repair material for injection is controlled.

A method for reinforcing an existing stone masonry wall, wherein, the UHPC (ultra high performance concrete) material for reinforcing an existing stone masonry wall as a reinforcing material, comprising following steps: step (1): carrying out a pretreatment to the existing stone masonry wall to be reinforced; step (2): tensioning and thereby reinforcing the existing stone masonry wall pretreated in the step (1); step (3): injecting a prepared UHPC material into the mortar joint by a manual squeezing; step (4): spraying prepared UHPC material onto the existing stone masonry wall that has been treated in the step (3) by a spraying process; step (5): maintaining; the UHPC material includes: 550-600 kg/m.sup.3 of silicate cement, 180-200 kg/m.sup.3 of white silica fume, 510-530 kg/m.sup.3 of limestone powder, 715-735 kg/m.sup.3 of quartz sand, 60-75 kg/m.sup.3 of iron ore tailings particles, 50-60 kg/m.sup.3 of pumice particles, 15-30 kg/m.sup.3 of polycarboxylic acid water reducing agent, 230-255 kg/m.sup.3 of water and 25-35 kg/m.sup.3 of POM fiber.

A ballistic panel formed with a ballistic material, the panel comprising: a panel with a filled void; wherein the filled void is filled with a ballistic replacement material; and wherein the filled void exhibits ballistic properties equivalent to the ballistic panel formed with the ballistic material; wherein the ballistic replacement material and the ballistic material comprise between about 1121 kg/cubic meter (about 70 pounds per cubic foot) and about 1442 kg/cubic meter (about 90 pounds per cubic foot); and wherein the ballistic replacement material and the ballistic material comprise: about 1 part by mass Portland cement; about 0.5 to 1.5 part by mass fine aggregate; and about 0.0005 to 0.05 part by mass air entrainment additive; about 0.005 to 0.15 part by mass fiber; about 0.005 to 0.05 part by mass aluminum hydroxide and about 0.005 to 0.05 part by mass calcium phosphate.

A method and apparatus for automatically repairing structure cracks. The method may include mixing a filler material with ferromagnetic dust to create a filler material mixture. The method may also include storing each filler material mixture in a filler material reservoir. The method may also include creating an array of magnetic coils in the structure, where the array of magnetic coils creates a magnetic path through the structure. The apparatus may include a structure. The structure may include a plurality of filler material reservoirs, wherein each filler material reservoir stores a filler material mixture. The structure may also include an array of magnetic coils inside the structure.

The present disclosure provides a concrete structure strengthened using a grid reinforcement material and non-shrink grout and a method of strengthening the same in which, when strengthening a concrete structure such as a concrete slab or a concrete wall body that is damaged or deteriorated, a grid reinforcement material is mounted on one side of the concrete structure, a formwork is formed on an outer side of the grid reinforcement material to have a required gap, and then the gap is filled with non-shrink grout so that the non-shrink grout is cured therein to strengthen the old concrete structure, thereby being able to automatically fill and repair cracks formed in the concrete structure just by injecting the non-shrink grout without separately performing crack repair on the old concrete structure. Also, the grid reinforcement material may be easily fixed or mounted using a grid fixing device and may be easily applied to strengthening of a concrete structure having a curved surface as well as a concrete structure having a flat surface such as a concrete slab or a concrete wall body. In addition, reinforcing bars may be additionally arranged in a gap between a surface of the concrete structure and the grid reinforcement material so that the grid reinforcement material increases a cover thickness, and thus the concrete structure is remarkably strengthened.

A method of sealing a leaking crack in a structure involves drilling a delivery channel into the structure adjacent the crack and in towards the crack to join the crack. A delivery nozzle is inserted into the delivery channel to inject a sealant comprising latex and water under pressure into the crack. The sealant may be injected until the sealant forms a seepage on an exterior surface of the crack which is sprayed with a reactive agent to cure the sealant to form a skin. Thereafter further sealant may be injected via the delivery channel after the skin is formed to enhance the ingress of sealant within the crack.

A method for testing whether a sealing method is effective may include the steps of testing a flow characteristic of the substrate, sealing the substrate, re testing the flow characteristic of the substrate, then comparing the before and after flow characteristics of the substrate to determine whether the sealing step was effective or to quantify a sealing effectiveness to the sealing step.

Provided is an unmanned aerial vehicle capable of carrying an aerosol container, comprising: a discharge unit with a discharge outlet for discharging contents of the aerosol container from the discharge outlet; a camera capable of capturing footage of the discharge range of the contents; an information acquiring unit for acquiring predetermined information; and an estimation unit for estimating an estimated landing position of the contents based on information obtained by the information acquiring unit. The unmanned aerial vehicle may include a camera capable of capturing footage of a discharge range of the contents; and a coupling unit that is couple with the camera and is a posture control mechanism with rotational degrees of freedom to change a posture.

A ballistic panel formed with a ballistic material, the panel comprising: a panel with a filled void; wherein the filled void is filled with a ballistic replacement material; and wherein the filled void exhibits ballistic properties equivalent to the ballistic panel formed with the ballistic material; wherein the ballistic replacement material and the ballistic material comprise between about 1121 kg/cubic meter (about 70 pounds per cubic foot) and about 1442 kg/cubic meter (about 90 pounds per cubic foot); and wherein the ballistic replacement material and the ballistic material comprise: about 1 part by mass Portland cement; about 0.5 to 1.5 part by mass fine aggregate; and about 0.0005 to 0.05 part by mass air entrainment additive; about 0.005 to 0.15 part by mass fiber; about 0.005 to 0.05 part by mass aluminum hydroxide and about 0.005 to 0.05 part by mass calcium phosphate.