A kind of waste brick recycled ultra-high toughness mixture and its preparation method and application

Abstract

The invention belongs to the technical field of building materials, and in particular relates to a waste brick recycled ultra-high toughness mixture and its preparation method and application, a waste brick recycled super high toughness mixture, water, cement, fly ash, recycled brick fine aggregate , polyethanol fiber, water reducer, thickener, the mass ratio of each component is, water: cement: fly ash: recycled brick fine aggregate: polyethanol fiber: water reducer: thickener = 1: 1.2~ 1.85: 0.76~1: 0.6~1: 0.01~0.04: 0.001~0.003: 0.003, a waste brick recycled super high toughness mixture provided by the present invention uses fly ash to replace part of the cement, and uses recycled brick fine aggregate ( Particle size ≤ 0.3mm) to replace quartz sand, which can not only make cement-based materials green, the tensile strain can reach 2%~5%, and it is also a good solution to the various problems caused by the brittleness and weak tensile properties of traditional concrete. Defects have good guiding significance for engineering practice.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a recycled super-high toughness mixture of waste bricks and its preparation method and application. Background technique [0002] Concrete is the most widely used building material in modern engineering. It has the advantages of wide source of raw materials, cheap price, simple preparation process, easy to manufacture into different shapes, and excellent mechanical properties and durability. However, this material also has high brittleness, low tensile strength, and is prone to cracks under load and environmental effects, which will accelerate the diffusion of external chemical media to the interior and greatly reduce the service life of the building structure. Therefore, it is of great significance to inhibit the generation and expansion of cracks and change the brittle failure mode of cement concrete materials to prolong the service life of buildings. At...

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Problems solved by technology

[0005] In the prior art, there have been many related research results on ultra-high toughness cement-based composite materials and recycled brick aggregates, but the following issues are still less involved: (1) In the prior art, the ultra-high toughness cement-based composite materials The research on materials mostly focuses on natural materials as components, but less research on recycled materials as components

(2) At present, in the existing technology, there are many studies on adding fly ash as an external admixture to the cement base material, and there are few related studies on replacing cement with internal admixture

(4) At present, the research on recycled aggregates is mostly based on coarse aggregates, and there are few studies on fine aggregates, and there are few reports on the complete replacement of quartz sand with fine aggregates.

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