WO2020029308A1 - Construction method for quickly repairing concrete pavement crack in zipper-manner - Google Patents

Abstract

A construction method for quickly repairing a concrete pavement crack in a zipper-manner, comprising the following steps: (1) taking the concrete crack as a center line by using a marking pen, drawing a parallel line having a width of 20 cm, and drawing circles each having a diameter of 20 cm on the parallel line every 50 cm; (2) drilling holes in a circular position by using a drill; (3) cutting concrete, chiseling out the concrete in the range by using a pneumatic pick, wherein the chiseling depth is 1/2-1/3 of a concrete layer of the pavement; and (4) cleaning the chiseled out concrete; wetting a surface needing to be repaired and removing visible water; finally pouring a stirred SC-type repairing material to a repairing tank and performing vibration compaction, polishing by using a barby; curing by sprinkling water after complete final setting and hardening of the material, and covering the pavement by using a plastic thin film. The construction method has a good repairing effect and can effectively reduce the re-damage rate.

Description

Construction method for fast repairing cracks of concrete pavement by zipper type Technical field

The invention relates to a crack repair method for a concrete pavement.

Background technique

The existing concrete pavement cracks have problems such as troublesome construction and unsatisfactory repair effects, and need to be further improved.

technical problem

The object of the present invention is to provide a construction method for quickly repairing cracks in a concrete pavement with a good zipper type.

Technical solutions

A construction method for quickly repairing cracks in a concrete pavement by a zipper type, which is characterized in that it includes the following steps:

(1) Use a marker to take the concrete crack as the center line, draw parallel lines with a width of 20 cm, and draw circles with a diameter of 20 cm every 50 cm on the parallel lines;

(2) Use a drill to drill holes in a circular position; the drilling depth is to penetrate the concrete layer;

(3) Use a concrete cutter to cut the concrete along the line drawn. Use a pneumatic pick to cut the concrete in this range. The depth of cut should be 1/2 ~ 1/3 of the pavement concrete layer, and be as uniform as possible. Avoid cutting Edge phenomenon;

(4) Clean up: first clean up the debris and the debris, and then thoroughly wash the concrete surface with a high-pressure water gun, and clean the cut with a steel brush or iron wiper. There must be no floating ash;

(5) Wet: Wet the cut repaired surface sufficiently; there should be no clear water before repairing. If there is clear water, clean it with a sponge or rag;

(6) Stirring: Use a mixer to dry mix SC-type repair material and clean crushed stone equivalent to 50% -100% of the weight of SC-type repair material until all are evenly mixed, then add 14% ~ 15 equivalent to the weight of SC-type repair material % Water for 3-5 minutes, until it is evenly mixed to obtain the repair material;

(7) Repair: Pour evenly mixed repairing materials into the cleaned repairing grooves and “8” -shaped grooves. Immediately compact with a vibrating stick, and use a scraping rule to repeatedly level up and back again with a trowel. Forming, the operating time is controlled within 20 minutes, and the second surface must not be calendered;

(8) Maintenance: After the material has set for an hour, wait for it to fully harden before spraying and curing and cover it with plastic film.

The diameter of the clean crushed stone in step (6) is less than 30㎜ in continuous gradation, and the washed crushed stone is washed with water.

Beneficial effect

The invention has good repair effect, long service life, and can effectively reduce the re-damage rate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a construction schematic diagram of a repair structure according to an embodiment of the present invention.

Best Mode of the Invention

A construction method for quickly repairing cracks in a concrete pavement by a zipper type, including the following steps:

(1) Use a marker to take the concrete crack as the center line, draw parallel lines with a width of 20 cm, and draw circles with a diameter of 20 cm every 50 cm on the parallel lines;

(2) Use a drill to drill holes in a circular position; the drilling depth is to penetrate the concrete layer;

(3) Use a concrete cutter to cut the concrete along the line drawn. Use a pneumatic pick to cut the concrete in this range. The depth of cut should be 1/2 ~ 1/3 of the pavement concrete layer, and be as uniform as possible. Avoid cutting Edge phenomenon;

(4) Clean up: first clean up the debris and the debris, and then thoroughly wash the concrete surface with a high-pressure water gun, and clean the cut with a steel brush or iron wiper. There must be no floating ash;

(5) Wet: Wet the cut repaired surface sufficiently; there should be no clear water before repairing. If there is clear water, clean it with a sponge or rag;

(6) Stirring: Use a mixer to dry mix SC-type repair material and clean crushed stone equivalent to 50% -100% of the weight of SC-type repair material until all are evenly mixed, then add 14% ~ 15 equivalent to the weight of SC-type repair material % Water for 3-5 minutes, until it is evenly mixed to obtain the repair material;

(7) Repair: Pour evenly mixed repairing materials into the cleaned repairing grooves and “8” -shaped grooves. Immediately compact with a vibrating stick, and use a scraping rule to repeatedly level up and back again with a trowel. Forming, the operating time is controlled within 20 minutes, and the second surface must not be calendered;

(8) Maintenance: After the material has set for an hour, wait for it to fully harden before spraying and curing and cover it with plastic film.

The diameter of the clean crushed stone in step (6) is less than 30㎜ in continuous gradation, and the washed crushed stone is washed with water.

The repaired structure after repair includes the repair groove 1 along the length of the crack. The repair groove is formed by cutting out the concrete on the left and right sides of the crack. The width of the repair groove is 20cm and the depth is 1/2 ~ 1/3 of the concrete layer on the pavement. The “8” -shaped groove 2 is set at 50cm intervals in the length direction of the repair groove. The depth of the “8” -shaped groove is the thickness of the pavement concrete layer, and the arc diameter of the “8” -shaped groove is 20cm. ; A repairing layer 3 is provided in the repairing groove and the "8" -shaped groove, and the surface of the repairing layer is flush with the concrete pavement. The left and right edges of the repair groove are parallel to each other.

Claims (2)

1. A construction method for quickly repairing cracks in a concrete pavement by a zipper type, which is characterized in that it includes the following steps:

   (1) Use a marker to take the concrete crack as the center line, draw parallel lines with a width of 20 cm, and draw circles with a diameter of 20 cm every 50 cm on the parallel lines;

   (2) Use a drill to drill holes in a circular position; the drilling depth is to penetrate the concrete layer;

   (3) Use a concrete cutter to cut the concrete along the line drawn. Use a pneumatic pick to cut the concrete in this range. The depth of cut should be 1/2 ~ 1/3 of the pavement concrete layer, and be as uniform as possible. Avoid cutting Edge phenomenon;

   (4) Clean up: first clean up the debris and the debris, and then thoroughly wash the concrete surface with a high-pressure water gun, and clean the cut with a steel brush or iron wiper. There must be no floating ash;

   (5) Wet: Wet the cut repaired surface sufficiently; there should be no clear water before repairing. If there is clear water, clean it with a sponge or rag;

   (6) Stirring: Use a mixer to dry mix SC-type repair material and clean crushed stone equivalent to 50% -100% of the weight of SC-type repair material until all are evenly mixed, then add 14% ~ 15 equivalent to the weight of SC-type repair material % Water for 3-5 minutes, until it is evenly mixed to obtain the repair material;

   (7) Repair: Pour evenly mixed repairing materials into the cleaned repairing grooves and “8” -shaped grooves. Immediately compact with a vibrating stick, and use a scraping rule to repeatedly level up and back again with a trowel. Forming, the operating time is controlled within 20 minutes, and the second surface must not be calendered;

   (8) Maintenance: After the material has set for an hour, wait for it to fully harden before spraying and curing and cover it with plastic film.
2. The method for quickly repairing cracks in a concrete pavement according to claim 1, wherein the diameter of the clean crushed stone in step (6) is less than 30㎜ in continuous gradation and the washed stone is washed with water.