Composite repairing material as well as application and construction method thereof

Abstract

The invention discloses a composite repairing material. The composite repairing material is prepared from the following raw materials in parts by mass: 30 to 40 parts of #191 unsaturated resin, 3 to 5 parts of glass micro-powder, 15 to 20 parts of gas-phase-method silicon dioxide, 15 to 20 parts of American white carbon black, 3 to 5 parts of reduced iron powder, 10 to 15 parts of silicon micro-powder and 1 to 3 parts of a coupling agent. The composite repairing material is used for reinforcing and repairing corroded parts of a pipeline; an embedded part is mounted at the 30cm part of each of the two ends of a polished pipe section; in a construction process, the embedded parts and the outer part of the polished pipe section are coated with one layer of special composite repairing material; after platinum fiberglass cloth is sufficiently impregnated by the composite repairing material, the glass fiber cloth is uniformly pressed and wound on the pipe section of a polishing section until a standard thickness is reached. The pipeline is repaired and reinforced through the composite repairing material and a previous bearing capability of the pipeline is recovered, so that the service life of the pipeline is prolonged; after the pipeline is repaired, the technical requirement of 10 years of service life can be realized.

Description

technical field [0001] The invention relates to the technical field of pipeline corrosion parts reinforcement, in particular to a composite repair material and its application and construction method. Background technique [0002] Pressure pipelines have many defects due to corrosion, mechanical damage and other reasons during service. These defects reduce the strength of the pipeline, making its bearing capacity unable to reach the original design pressure. These defects seriously threaten the safe operation of the pipeline. The radial expansion of the pipe due to internal pressure produces hoop tensile stress in the pipe wall. Stress concentrations occur in areas of pipe wall thinning, such as corrosion pits, where crack failure and leakage will occur when the stress is greater than the material's tensile strength limit. [0003] In order to repair the defects, welding, carbon fiber, and fixtures are generally used for repairing. Reinforcement by welding or fixture metho...

AI Technical Summary

Problems solved by technology

Reinforcement by welding or fixture method requires hot fire, and also needs to stop pipeline transportation. The resin-based fiber used in carbon fiber cannot solve the secondary leakage problem caused by the difference in expansion coefficient between resin and metal pipelines; this will increase the cost, and Short service life and poor repair effect