Fly ash microsphere-doped C70 high-performance graphene oxide concrete and preparation method thereof

Abstract

The invention discloses a fly ash microsphere-doped C70 high-performance graphene oxide concrete and a preparation method thereof. A graphene oxide mortar comprises, by mass, 391.85 parts of cement, 166 parts of water, 570 parts of natural river sands, 1205 parts of broken stones, 69.15 parts of fly ash microspheres, 9.22 parts of a polycarboxylate superplasticizer and 17.288 parts of a graphene oxide solution raw material. A preparation method of the graphene oxide mortar includes the following steps: proportioning of above raw materials, mixing of the raw materials, pouring, forming and curing. The preparation method is simple and is easy to operate. The slump of the C70 high-performance concrete prepared in the invention meets engineering requirements, and the C70 high-performance concrete has an excellent chloride ion penetration resistance. The price of the fly ash microsphere-doped C70 high-performance graphene oxide concrete prepared in the invention is half of that of similar products prepared through other technologies; and the cement consumption of the C70 high-performance graphene oxide concrete is 18% less than that of C70 high-performance concrete prepared through C70high-performance concreted design and having same performances. The reduction of the cement consumption facilitates environment protection.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to the technical field of concrete preparation methods. Background technique [0002] Concrete is 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. Concrete has high compressive strength, but high brittleness, low tensile strength, poor ductility and toughness, easy cracking and low penetration resistance. Under the joint action of mechanical loads and environmental loads, its durability is reduced. premature failure or failure. At the same time, green and sustainable development is an inevitable trend of the times. Extensive use of concrete requires the production of a large amount of cement, which seriously affects the environment. [0003] Scientists from all over the world have ...

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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 hydration capacity of cement, and cannot fundamentally improve the microstructure of the gel. Therefore, it is very important to improve the strength of concrete. and durability have a limited effect

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) Add fibers (such as carbon fiber, steel fiber, glass fiber). The main problem with this method is that this technology only prevents the crack growth of concrete from a macroscopic point of view, but does not improve the hydration capacity of cement, and cannot fundamentally improve the concrete. Glue microstructure, so it has limited effect on improving the strength and durability of concrete;

[0006] (3) Add carbon nanotubes. The main problem of this method is that the gel is denser by filling, which does not improve the hydration capacity of cement, and cannot fundamentally improve the microstructure of the gel. Therefore, it is very important to improve the strength and durability of concrete. limited role

At present, the production process of graphene oxide concrete is expensive and difficult to produce on a large scale in industry

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