Reinforcing structure and reinforcing method of sea sand steel bar concrete beam

Abstract

The invention relates to the technical field of building engineering and discloses a reinforcing structure of a sea sand steel bar concrete beam. The reinforcing structure comprises a sea sand concrete layer and a reinforcing layer which are sequentially arranged in an adjoining mode from top to bottom. The reinforcing layer comprises a tensile steel bar and an ultrahigh toughness cement-based composite material layer covering the tensile steel bar. The invention further discloses a reinforcing method of the sea sand steel bar concrete beam. The reinforcing method comprises the steps that sea sand concrete on the periphery of the steel bars on the tensile side is cleaned up, the ultrahigh toughness cement-based composite material layer is poured outside the exposed tensile steel bar, and the poured ultrahigh toughness cement-based composite material layer is made to cover the tensile steel bar. According to the reinforcing structure and reinforcing method of the sea sand steel bar concrete beam, ECC (Engineered Cementitious Composites) are utilized to separately reinforce the sea sand steel bar concrete beam, or FRP (Fiber Reinforce Polymer)-ECC is utilized to reinforce the sea sand steel bar concrete beam in a combined mode, so that the bearing capacity of the sea sand steel bar concrete beam is effectively repaired, the ductility of the structure is improved, the situation that chloride ions and harmful media in the external environment corrodes the tensile steel bar is resisted, and the steel bar is prevented from being rusted for the second time, so that the durability of the structure is improved.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a reinforcement structure and a reinforcement method of a sea sand reinforced concrete beam. Background technique [0002] River sand resources are increasingly scarce, especially in coastal areas where engineering construction develops rapidly, and there has been a serious shortage of construction sand. In order to save economic costs, some unscrupulous manufacturers use sea sand or sea sand whose chloride ion content does not meet the standard after treatment for construction. High chloride ions in sea sand will destroy the passivation film on the surface of steel bars, resulting in rapid corrosion of steel bars and a decrease in structural bearing capacity, resulting in a large number of substandard housing constructions. [0003] At present, the direct repair method is commonly used for sea-sand concrete beams. This method is to directly remove the sea sand...

AI Technical Summary

Problems solved by technology

This method is to directly remove the sea sand concrete on the tension side, remove the rust on the surface of the steel bar, and then pour the concrete or mortar with high impermeability to replace the rust around the steel bar on the tension side after brushing the steel bar rust inhibitor as required. Sea sand concrete, but once the concrete or mortar with high impermeability cracks, it cannot bear the tensile force, and it cannot effectively prevent the chloride ions in the upper sea sand concrete and harmful media in the external environment from corroding the steel bars. Therefore, there is a bearing capacity Insufficient, excessive cracks, poor durability, etc.

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