Reinforced concrete structure containing early strength type ultra-high performance concrete

Abstract

The invention relates to a reinforced concrete structure containing early-strength ultra-high-performance concrete, which includes a construction panel and a reinforced concrete structure body. The reinforced concrete structure body includes a steel skeleton and early-strength ultra-high-performance concrete poured into the steel skeleton , the upper part of the reinforced concrete structure body is provided with a wear layer, and the early-strength ultra-high performance concrete is composed of cement, fine admixtures, aggregates, admixtures, fibers and water, and has the following properties: 3h compressive strength is less than Less than 30MPa, 28d ultimate tensile strain not less than 3000με. Compared with the prior art, the early-strength ultra-high-performance concrete of the present invention has good ductility and is not easy to crack. It can coordinate deformation with the construction panel and improve the mechanical performance of the structure; the steel skeleton is a steel mesh shear structure, reducing The stress range in the construction panel under the action of the vehicle is reduced, and its durability is improved; the reinforced concrete structure is suitable for rapid maintenance of the bridge deck structure, and the impact of construction on traffic is minimized.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a reinforced concrete structure containing early-strength ultra-high performance concrete. Background technique [0002] Because reinforced concrete has the advantages of local materials, simple construction, strong moldability, good durability and fire resistance, and low cost, it has been widely used in buildings and bridge structures. Ultra-high performance concrete has excellent mechanical properties, which makes the development of building structures tend to be large-span and lightweight. The reinforced concrete structure using this type of concrete can reduce the thickness of the concrete layer and improve the durability of the building structure. [0003] Ultra-high performance concrete and construction panels have simultaneous deformation. If the ultimate tensile strain of ultra-high performance concrete is small, it will lead to premature cracking of ultra-hi...

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Problems solved by technology

[0003] Ultra-high performance concrete and construction panels have simultaneous deformation. If the ultimate tensile strain of ultra-high performance concrete is small, it will lead to premature cracking of ultra-high performance concrete, which will affect the service life of ultra-high performance concrete. Cracks will cause water seepage and rust the steel structure , affecting the safety of the building structure; at the same time, ultra-high performance concrete curing generally adopts high-temperature steam curing, and the curing time is not less than 48 hours, and the curing time is relatively long. It is not ideal, so the quality is difficult to control; and for the bridge deck structure section with heavy traffic flow and poor social impact caused by the closure, maintenance for 48 hours will make it difficult to implement traffic organization, and these sections usually require maintenance to be completed within 7 o'clock at night work, which brings great inconvenience to construction workers

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