Normal temperature curing type ultrahigh-performance concrete and application thereof

Abstract

The invention relates to normal temperature curing type ultrahigh-performance concrete and an application thereof. The concrete per cubic meter comprises, by weight, 600-1200kg of cement, 50-200kg of mineral additives, 800-1200kg of fine aggregate, 78-300kg of steel fiber, 3-15kg of a water reducing agent (solid content), 0.6-5kg of a defoaming agent, 60-129kg of an expanding agent and 100-250kg of water. Compared with the prior art, the normal temperature curing type ultrahigh-performance concrete has the advantages of good ductility, less proneness to cracking, coordination deformation with construction panels and improvement of structural tension performance; the normal temperature curing type ultrahigh-performance concrete is short in curing time, 3 hours is enough for completion of curing, construction time can be effectively reduced, compressive strength is not less than 120Mpa, and service life of the ultrasonic-performance concrete is prolonged.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a normal temperature curing ultra-high performance concrete and its application. Background technique [0002] Concrete has been widely used in buildings and bridge structures due to its advantages of local materials, easy construction, strong moldability, good durability and fire resistance, and low cost. Ultra-high-performance concrete has excellent mechanical properties, which makes the development of building structures tend to be large-span and lightweight. The application of this type of concrete can reduce the thickness of concrete layers in various structures and improve the durability of building structures. [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 af...

AI Technical Summary

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. Not ideal, so quality is difficult to control

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