Cement pavement repair requires high material bond strength, waterproof and impermeability, long service life, good compatibility with the original concrete base, and wear resistance. The cement pavement repair material is a material that specifically deals with the disease of the concrete pavement. It can repair the emptying, sanding, shelling, cracks, and peeling of the concrete pavement. Next Xiaobian will introduce cement pavement repair methods and cement pavement repair materials.
Cement pavement repair method
1. Injection grouting method
a, due to the hydration of cement, concrete cutting joints are not timely and inadequate roadbed strength, uneven and many other reasons, will cause road panel block, cross-cross cracks, cracked plate corners, cracked network, cracks and other cracks damage.
b. For non-extensible surface cracks with a width of 0.5 mm or less, a pressure injection grouting method may be used.
Use air compressor to remove debris inside the joint, press a grouting nozzle every 50 cm, seal the seam with tape, and seal the rosin wax on the grout nozzle and tape (Rosin: paraffin = 1:2 ratio heating and melting ) Finally press the epoxy solution into the seam. If the condition is not available or the crack damage is light, it can also be sealed directly with joint fillers.
2, expansion joint grouting method
The slits are first widened to 1.5cm square grooves along the crack. The depth of the groove is determined by the depth of the crack, but the maximum depth must not exceed 2/3 of the board thickness. Blow out the swarf with air compressor, apply interface agent or epoxy solution, fill in 0.5 cm in diameter cleaning chips, and apply 15:2 polysulfide modified epoxy and curing agent. Grooves, with far-infrared lamp heating to enhance 2-3 hours to traffic.
3, direct grouting method
For non-extensive cracks, direct grouting can be used. First remove the impurities in the seams, seams, mud, etc., and blow the net with air compressor to ensure that the joints are dry and free of water. Apply a layer of polyurethane primer to the seams at a thickness of 0.3±0.1. Cm, the amount of primer is 0.15, and the component A composed of polypropylene glycol, toluene diisocyanate, plasticizer, white carbon, filler and the like is used. The B component consists of a catalyst, a curing agent, and an anti-sagging agent. When used, press A:B=10;1 to prepare the ratio. A, B liquid should not be exposed to the air for a long time to prevent self-polymerization. Then the prepared polyurethane adhesive is poured into the seam and cured after 4-6 hours.
4, strip cover method
For full-thickness cracked cracks, stripping should be used to repair. First, along the two sides of the crack about 20cm, and parallel to the contraction slit 7-10cm deep two transverse joints, in which artificially cut 7-10cm, 10cm along both sides of the crack, every 50cm drilling a pair of palladium 20cm long bending Hook length 7cm, ¢16 rebar, coated with interface agent or epoxy resin solution in the hole, and then cast fast hardening ç ¼, spraying curing agent. Deepen the shrinkage joint with a slitting machine, fill the sewing material, and finally, repair the blind ditch at the end of the crack to facilitate drainage.
5, surface cracking treatment
For more surface cracks and surface cracks, the crack can be classified as a construction surface, the cracks in the construction surface can be chiseled into a 7-10cm groove and blown with a compressor, and then coated with an interfacial agent or epoxy. Resin solution, filled with T-6 latex mortar (according to cement: sand: stone: J-6: water = 1:1.6:3.25:0.019:0.35: slump of 1-2cm), spraying curing agent, 4 hours It will be open to traffic.
Cement pavement repair material
1. Cement pavement repair material can bond well with cement, and it will not be pulled out when cement concrete expands;
2. The construction is more convenient and can be opened to traffic after four hours of construction;
3, this material has a very high strength in the early days, and the long service life, the late strength will not weaken;
4, high compressive strength, the final strength can be as high as 80Mpa, a good supplement to the disease;
Editor's summary: The cement pavement repair method and the cement pavement repair material are introduced here, and we hope to help everyone. If you want to know more about yourself, you can follow the information on this site.
Conch Cement Cement Cement Cabinet Price Cement Cabinet Door Decoration Cement Stair Cement Road Repair Method
Upron Bathtub
Upron Bathtub
Guangzhou Aijingsi Sanitary Products Co.,Ltd , https://www.comoxvalleyhottubs.com