Waste brick regenerated ultrahigh-toughness mixture as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of building materials and in particular relates to a waste brick regenerated ultrahigh-toughness mixture as well as a preparation method and application thereof. The waste brick regenerated ultrahigh-toughness mixture is prepared from water, cement, fly ash, a regenerated brick fine aggregate, polyethylene alcohol fiber, a water reducing agent and a thickening agent, wherein the mass ratio of the components, namely the mass ratio of the water to the cement to the fly ash to the regenerated brick fine aggregate to the polyethylene alcohol fiber to the water reducing agent to the thickening agent is 1:(1.2-1.85):(0.76-1):(0.6-1):(0.01-0.04):(0.001-0.003):0.003. The invention provides the waste brick regenerated ultrahigh-toughness mixture, fly ashis used for replacing a part of cement, and the regenerated brick fine aggregate (the particle size is smaller than or equal to 0.3mm) is used for replacing quartz sand, so that a cement-based material can be greened, the tensile strain can be up to 2-5%, various defects caused by brittleness and weak stretchability of conventional concrete are well overcome, and the mixture has good guiding significances 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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