Waterproof concrete synergist and preparation method thereof

Abstract

The invention discloses a waterproof concrete synergist and a preparation method thereof, and relates to the technical field of concrete admixtures. The waterproof concrete synergist comprises the following components by mass: 12-16% of polyaminated cellulose microspheres, 17-32% of modified waterborne polyurethane, 7-10% of a dispersant, 4-7% of a retarder, 2-5% of polyaluminum ferric sulfate, and the balance of water. According to the synergist, cement can be more sufficiently dispersed in concrete, so that the early strength and the later strength of the concrete are improved; and in addition, the synergist has the waterproof capability, and the practical engineering application range of the agent is expanded due to the improvement of the waterproof capability.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a waterproof concrete synergist and a preparation method thereof. Background technique [0002] With the vigorous development of modern industry, concrete is widely used as a building material. Cement is the main raw material for the production of concrete. For a long time, cement, as an important cementitious material, has been widely used in civil engineering, water conservancy, national defense and other projects. According to a large number of studies, 10-20% of the cement in the concrete is still not fully dispersed and hydrated, resulting in the inability to fully play its due role. If the hydration rate of the cement can be increased, a lot of engineering costs will be saved. [0003] Concrete synergist is a new type of additive that is different from other concrete admixtures. It can fully disperse cement particles that have not undergone hydration reaction, ...

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Problems solved by technology

The concrete synergist described in this invention patent can effectively stimulate the dispersion of cement particles, promote the degree of cement hydration, make full use of cement components, and improve the early strength of concrete. However, it can be seen from the experimental verification that this additive has no effect on the later strength of concrete. Significantly improved, and due to the introduction of calcium ions and thickeners, early setting phenomenon cannot be avoided in the early stage of concrete forming

[0006] Patent Application Publication Document CN108892411A has reported that a concrete waterproofing agent is composed of hyaluronic acid solution, gelatin solution, isocyanate, polyethylene glycol, ethylene glycol dishrink Glyceryl ether, etc., the highlight of the invention is the addition of modified polyethylene glycol and ethylene glycol diglycidyl ether, both of which form cross-linked esters with hyaluronic acid added to the product under the promotion of cement hydration reaction, Thereby improving the hydrophobicity of concrete, but the isocyanate in the composition will produce gas after directly reacting with water, which will lead to a substantial increase in the number of concrete pores and affect the compactness of concrete. The weakening of compactness will inevitably lead to a decrease in the compressive strength of concrete

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