Basalt-steel fiber high-performance cement-based composite material and preparation test method

Abstract

The invention relates to a basalt-steel fiber high-performance cement-based composite material and a preparation test method thereof. The basalt-steel fiber high-performance cement-based composite material comprises the following material components: cement, fly ash, silica fume, a thickening agent, fine sand, a water reducing agent, a thickening agent, basalt fibers and steel fibers. The peak stress, the peak strain, the elastic modulus and the compression toughness of the basalt-steel fiber high-performance cement-based composite material disclosed by the invention are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a basalt-steel fiber high-performance cement-based composite material and a preparation test method. Background technique [0002] At present, many buildings have reached the designed service life or even overdue service, and the traditional repair and reinforcement method of old buildings not only has a long construction period and high cost, but also reduces the building space and increases the weight of the structure. Not applicable under extreme conditions. With the transformation and upgrading of the construction industry to standardization, factoryization and assembly, the construction industry has put forward higher requirements for the quality and safety level of prefabricated structures. The concrete materials currently used for the connection of prefabricated components are poorly deformed and easy to crack, which easily leads to material mechanics. The perfo...

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Problems solved by technology

[0002] At present, many buildings have reached the design service life or even overdue service. However, the traditional repair and reinforcement methods for old buildings not only have a long construction period and high cost, but also reduce the space used by the building and increase the weight of the structure. Not suitable for extreme conditions such as

With the transformation and upgrading of the construction industry to standardization, factoryization, and assembly, the construction industry has put forward higher requirements for the quality and safety of prefabricated structures. Performance degradation and reduced durability, and the structure is prone to brittle failure due to damage to the connection parts under earthquakes, fires and other disasters

[0003] Fiber-reinforced cement-based composite materials mostly have the characteristics of high strength, high toughness, and high durability. Mixing several different fibers can often improve the lack of improvement in material performance and the mechanical properties of materials after high temperature / fire. However, organic fibers have a low melting point, and after melting at about 400°C, they cannot achieve the purpose of pulling the matrix and achieving the purpose of strengthening and toughening.

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