Bridge coarse aggregate active powder concrete and preparation method thereof

Abstract

The invention discloses bridge coarse aggregate active powder concrete and a preparation method thereof. The coarse aggregate active powder concrete comprises, by weight, 100 parts of cement, 20-60 parts of blending materials, 2-10 parts of interface modifying agents, 60-120 parts of fine aggregates, 40-120 parts of coarse aggregates, 10-60 parts of fibers and 15-30 parts of water. Under conventional curing processes such as natural conditions, the coarse aggregate active powder concrete has super-high compressive strength, bending tensile strength and tensile strength and bonding strength andlow contraction performance and further has high elasticity modulus, anti-fatigue performance and durable performance and excellent construction performance, dead weight and shrinkage and creep influence of a bridge can be reduced, and the span, the structural stiffness and the bearing capacity of the bridge can be remarkably improved, and the service life of the bridge is prolonged.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a coarse aggregate active powder concrete which can be used in large-span bridge engineering and a preparation method thereof Background technique [0002] Traditional bridges use ordinary concrete bridge decks. Due to the weight of the concrete material, low strength, small elastic modulus, and large shrinkage and creep, the participation of the bridge deck in the stress of the composite beam is low. In order to increase the force participation of the concrete bridge deck , had to use a bridge deck with a thickness between 250mm and 300mm. In some areas, the thickness of the bridge deck can even reach 500mm. The huge main girder self-weight restricts the spanning ability and application range of the composite girder. Reactive powder concrete has the characteristics of high specific strength, large load capacity and good durability. It can not only greatly reduce the s...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a coarse aggregate active powder concrete for bridges and its preparation method, which can improve the harshness of raw materials, high cost, complex maintenance process, large shrinkage, high risk of cracking, difficult construction and elastic mold of the existing active powder concrete for bridges. Difficult to increase the volume and other issues

[0007] In order to solve the problems that the elastic modulus of reactive powder concrete for bridges is difficult to improve, the raw materials are harsh and the maintenance process is complicated, the invention provides a kind of coarse aggregate reactive powder concrete for bridges, and its product composition is calculated in parts by weight, including the following Components:

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