3results about How to "Avoid secondary cracking" patented technology

This utility model relates to the field of road and bridge construction technology, and in particular to a fixing structure for repairing road and bridge cracks. It includes a cylinder and a road surface. A crack groove is provided at the crack in the road surface for placing the cylinder. A top groove is formed above the crack groove. A vertically placed support is slidably installed inside the cylinder. A waterproof plate is fixedly connected to the top of the support after it slides through the cylinder. An inner cavity is formed at the top of the cylinder. Connecting rods are rotatably connected to both sides of a section of the support located in the inner cavity. A pull rod is rotatably connected to the end of the connecting rod away from the support. A fixing rod is provided at the end of the pull rod away from the connecting rod. This application improves construction efficiency and reduces difficulty through convenient adjustment of the fixing structure. Furthermore, the design of barbs and waterproof grooves enhances structural stability and waterproof performance. The mechanical structure under stress also prevents further cracking, ensuring the quality of the repair work in terms of construction efficiency and long-term stability of the repair effect.

The present application belongs to the technical field of metal material pressure processing, in particular to a hot rolling process method of wire rod for dual-phase steel welding wire, which comprises providing an electroslag remelted ingot with PREN value of 42±1; heating the ingot to 1200±10 DEG C and conducting 16 passes of blooming to obtain 120*120mm square billet with single pass reduction of ≤16%; adopting four-section step beam type heating furnace with soaking section temperature of 1180-1210 DEG C and holding time of ≥90min; closing the cooling water of rough rolling and intermediate rolling, adopting 1150 DEG C induction temperature compensation after the Φ76mm rough rolling outlet to make the core-surface temperature difference ≤20 DEG C; sequentially conducting 14 racks of intermediate rolling, 4 racks of pre-precision rolling, 8 racks of precision rolling and 4 racks of reducing diameter, with final rolling speed of 70-75m / s, precision rolling temperature of 1080-1120 DEG C and wire laying temperature of 1100-1180 DEG C; after the wire rod is coiled, cooling to below 550 DEG C at 0.8-1.0 DEG C / s on the delayed Stelmor line, with residence time above 550 DEG C of ≤35s; online solid solution treatment: by setting the process, the problem that the traditional hot rolling process is difficult to meet the temperature and deformation control is solved.

The application discloses a kind of fair-faced concrete wall crack repair methods, comprising: preparation bonding slurry, the bonding slurry includes epoxy resin base fluid, curing agent and nano calcium powder filler;The bonding slurry is full irrigation in the crack of fair-faced concrete wall;Along the length direction of the crack, the accommodation groove is opened in the outer side of the fair-faced concrete wall, the position of the accommodation groove corresponds to the position of the crack;Lay anti-cracking mesh on the groove bottom of the accommodation groove, the opposite sides of the anti-cracking mesh are overlapped on the opposite sides of the crack;Fill the fine aggregate concrete layer in the accommodation groove, anti-cracking agent and anti-cracking fiber are mixed in the fine aggregate concrete layer;Coat elastic protective layer on the outer side of the fine aggregate concrete layer.The application solves the existing repair method of fair-faced concrete wall surface, and the problems that the repair effect is not durable and secondary cracking is prone to occur.