High-rupture strength graphene oxide mortar and preparation method thereof

Abstract

The invention discloses high-rupture strength graphene oxide mortar and a preparation method thereof. The graphene oxide mortar contains the following raw materials in parts by mass: 450 parts of cement, 180 parts of water, 1350 parts of natural river sand, 0.9 part of a polycarboxylate superplasticizer and 8.5 parts of a graphene oxide solution raw material. The preparation method comprises the steps of raw material proportioning, raw material mixing, pouring, formation, and maintenance. The preparation method is simple and easy in operation. The matching proportion of the raw materials is optimized, and the graphene oxide solution raw material is added, so that the prepared graphene oxide mortar can meet the strength requirement and is low in cost, and the price of the prepared grapheneoxide mortar is 1 / 2 of the prices of similar products prepared by other techniques.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to the technical field of preparation methods of cement-based composite materials. Background technique [0002] Cement-based composite materials, such as cement mortar, are widely used in civil engineering fields such as industrial and civil buildings, bridges, and ports. According to reports, since 2011, the world has produced an average of 3.6 billion cement annually, of which more than 55% comes from China. Cement-based composite materials have high compressive strength, but high brittleness, low tensile strength, poor ductility and toughness, easy cracking and low permeability resistance. Decrease, premature failure or failure of the structure. At the same time, green and sustainable development is an inevitable trend of the times. The extensive use of cement-based composite materials requires the production of a large amount of cement, which seriously affects the ...

AI Technical Summary

Problems solved by technology

[0004] (1) Reduce the water-cement ratio. The problem in this method is that the smaller the water-cement ratio, the higher the strength, but it does not improve the cement hydration capacity, and cannot fundamentally improve the gel microstructure. The strength and durability of the material play a limited role

At the same time, the reduction of water-cement ratio means that the amount of cement will increase, and the price will increase accordingly, and the mass production of cement will cause more environmental pollution;

[0005] (2) Adding fibers (such as carbon fibers, steel fibers, glass fibers), the main problem of this method is that this technology only prevents the crack growth of cement-based composite materials from a macroscopic perspective, but does not improve the hydration capacity of cement, and cannot fundamentally Improve the microstructure of the gel, so it has a limited effect on improving the strength and durability of cement-based composites;

[0006] (3) Add fine mineral components such as fly ash, silica fume, and ultrafine slag. The main problem of this method is that the gel can be made denser by filling, but the hydration capacity of cement cannot be improved, and the cement cannot be fundamentally improved. The microstructure of cement-based composites has limited effect on improving the strength and durability of cement-based composites;

[0007] (4) Adding carbon nanotubes. The main problem of this method is that the filling makes the gel more compact, does not improve the cement hydration ability, and cannot fundamentally improve the microstructure of the gel. Durability has a limited effect

However, at present, the preparation process of high flexural strength graphene oxide mortar has high cost and is difficult to be applied in industrial production.

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