Preparation method of super-strong durable material

Abstract

The invention discloses a preparation method of a super-strong durable material. The preparation method comprises the following steps: weighing the following raw materials in percentage by mass: 35-57% of ground cement, 15-45% of graded fine sand, 15-45% of superfine ash and an additive with the solid content accounting for 0.3-1.5% of the total amount of the raw materials; mixing the ground cement, the graded fine sand, the superfine ash and the additive, adding water, and stirring to obtain mortar; manufacturing the mortar into a prefabricated part; enabling the prefabricated part to be subjected to steam curing and then placed in a carbonization kettle to be subjected to vacuum degassing and dehydration, then feeding gaseous and liquid CO2 into a carbonization kettle, controlling the pressure and the temperature, enabling the CO2 entering a carbonization kettle to be in a supercritical state, and carrying out constant temperature and pressure maintaining; and taking out the prefabricated part from the carbonization kettle, polishing and finishing the surface of the prefabricated part, and spraying an anti-corrosion and wear-resistant material on the surface of the prefabricated part. The strength and durability of the high-performance cement-based material are greatly improved, plates, pipes and profiles manufactured by steel, aluminum and other metals can be replaced on a large scale, and the high-performance cement-based material has the durability of a ceramic material.

Description

technical field [0001] The present invention relates to the field of cement-based materials. More specifically, the present invention relates to a method of making an ultra-strong durable material. Background technique [0002] The most important industrial material steel, because of its large volume, high strength, and good toughness, it is easy to adopt industrial production. It is easy to rust, and steel is more likely to rust in a humid environment, especially in an environment with corrosive media. It must be isolated with cement materials or protected by surface coating, and it should be maintained regularly during use. The service life of its building facilities is very difficult. For more than 50 years, in addition, steel production has caused a large amount of carbon emissions. On average, 1 ton of crude steel produced globally will emit 1.7 tons of CO 2 , the global steel industry's emissions account for about 2 6.7% of the total emissions. In 2020, the global c...

AI Technical Summary

Problems solved by technology

However, the high-performance active cement-based materials produced today still have a lot of room for improvement in terms of strength and durability because of their internal activity, that is, they are not completely carbonized. At present, ordinary pressurized carbonization cannot effectively carbonize this material, and CO 2 At temperatures above the critical temperature T c =31.26℃, the pressure is higher than the critical pressure P c In the state of =72.9atm, the properties will change, its density is close to that of liquid, its viscosity is close to that of gas, its diffusion coefficient is 100 times that of liquid, and it has extremely strong penetration ability. Experiments show that using supercritical CO 2 Treat ordinary concrete blocks with liquid, which can convert them into limestone in a few minutes, and at the same time remove the water formed in the reaction process from the micropores, so that the compressive strength of the treated concrete can be doubled, and the tensile strength 75% increase in strength if supercritical CO 2 Liquid infiltrates high-performance active cement-based materials, making them stronger than steel and more durable than ceramics, and can even replace stainless steel. This will open the precedent for inorganic non-metallic materials to replace metal materials. Supercritical CO 2 Dealing with high-performance reactive cement-based materials is not precedent and data-supported

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