High-strength steel bar and ultrahigh-performance concrete slab for reinforcing bending member

Abstract

The invention relates to the technical field of reinforcing of building structures and discloses a high-strength steel bar and ultrahigh-performance concrete slab for reinforcing a bending member. Thehigh-strength steel bar and ultrahigh-performance concrete slab for reinforcing the bending member is constituted by high-strength steel bars and ultrahigh-performance concrete. The slab is precast to reinforce an original structure or the member in an inorganic glue pasting or cast-in-situ mode. Compared with a common reinforcing technology, the slab is convenient to transport and mount, small in thickness, light, small in weight and high in strength, the abrasion-resistant and bearing capabilities are high, anti-impact and anti-fatigue performance is good, weather resistance is good, construction is rapid and efficient, a binder inorganic adhesive material resists the high temperature and can also resist the low temperature, low toxicity is achieved, combustion is avoided, environmentalpollution is avoided, oil resistance, radiation resistance and aging prevention are achieved, durability is good, room-temperature curing can be achieved, contraction is basically avoided, but some slabs are slightly expanded, raw materials are easy to obtain, the cost is low, and using is convenient. The high-strength steel bar and ultrahigh-performance concrete slab can be widely applied to a reinforcing method in various construction environments.

Description

technical field [0001] The invention relates to the technical field of building structure reinforcement, in particular to a high-strength reinforced ultra-high-performance concrete plate used for reinforcement of bending members. Background technique [0002] Due to natural disasters, changes in housing functions, design and construction and management errors, environmental corrosion and damage accumulation, and housing reaching the design service life, the construction industry is facing the problem of how to maintain, renovate and strengthen the existing building structures. Existing methods such as enlarging section reinforcement, outsourcing steel reinforcement, pasting carbon fiber reinforcement, bonded steel reinforcement, steel mesh composite mortar reinforcement, etc., have shown their respective deficiencies in many years of engineering practice. [0003] Ultra-high performance concrete (UHPC), also known as reactive powder concrete (Reactive Powder Concrete), is a ...

AI Technical Summary

Problems solved by technology

[0004] The existing reinforcement technology has the following problems: (1) The method of enlarging the cross-section has a certain influence on the appearance and headroom of the structure; (2) The force of the node area in the structure reinforced by outsourcing steel is complicated, and the structural treatment is quite difficult; (3) ) The fire resistance of the components reinforced with carbon fiber is poor, and special fire prevention treatment is required; (4) The reinforcement with steel is only suitable for components that withstand static forces and are in normal humidity environments; (5) The composite mortar reinforcement of steel mesh (6) The prestressed reinforcement method is not suitable for the reinforcement of concrete structures in high-humidity environments or concrete structures with large concrete shrinkage and creep. (7) The traditional reinforcement method The method is limited by the site construction conditions, the operation is relatively complicated, and the process is cumbersome

(8) There are problems with the durability of general concrete

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