A concrete anti-medium erosion admixture based on in-situ reaction encapsulation technology and its preparation method

Abstract

The invention discloses a concrete anti-medium erosion admixture based on in-situ reaction encapsulation technology and a preparation method. The core component of the concrete anti-medium erosion admixture based on in-situ reaction encapsulation technology is an encapsulated active component, and the encapsulation is to absorb and encapsulate the active component in the interlayer structure by the encapsulation component, The ratio between the encapsulating component and the active component is 0.5-8. The present invention encapsulates the inorganic nano-silica particles with high hydration reaction activity based on the coating technology, and then encapsulates the dissociation, release, and reaction of the inorganic nano-silica particles in the concrete hydration microenvironment in the later stage, and passes through the service process of the concrete The optimization of the microstructure realizes the obvious reduction of the long-term chloride ion diffusion coefficient of concrete, and provides a concrete anti-medium erosion admixture and preparation method based on in-situ reaction packaging technology for the improvement of concrete durability.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a concrete anti-medium erosion admixture based on in-situ reaction encapsulation technology and a preparation method thereof. Background technique [0002] Concrete is an important building material for infrastructure construction and is widely used in the main structural parts of construction projects. In recent years, with the promotion and implementation of major national strategies, the service environment, construction conditions and design life of my country's infrastructure have shown new characteristics. Traditional concrete has been difficult to adapt to the new changes in the design, construction and service performance of building structures. It is imperative to research new technologies to ensure and improve the durability of concrete in harsh environments. [0003] The main factors affecting the durability of concrete can be attributed to the ...

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Problems solved by technology

[0010] Nevertheless, the substantive content of the above-mentioned patent application has the following problems: (1) The purpose of using encapsulated highly reactive substances is to realize the self-healing effect on concrete cracks in the later stage, and the goal is not to significantly reduce the long-term chloride ion diffusion coefficient of concrete ; (2) Organic materials are mainly used as packaging materials, and the high-active substances are physically coated, which is not conducive to the automatic release of high-active substances, and it is necessary to use external force to destroy the packaging materials to produce effects

To sum up, the above-mentioned documents all report the encapsulation materials, preparation methods and application technologies for highly reactive substances in concrete, but the above-mentioned patent applications focus on the self-healing function of concrete, and do not include the long-term chloride ion diffusion coefficient of concrete Therefore, the effect of the above-mentioned technology on inhibiting the chloride ion diffusion coefficient of concrete under long-term service conditions remains to be discussed.

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