A cf50 concrete preparation process

Abstract

The invention relates to a preparation process of CF50 concrete. The CF50 concrete comprises the following components in parts by weight: 160 to 170 parts of water, 350 to 360 parts of cement, 140 to150 parts of coal ash, 30 to 40 parts of micro-silicon powder, 680 to 700 parts of medium sand, 1050 to 1100 parts of gravel, 38 to 45 parts of steel fiber, 0.5 to 1.0 part of dispersant and 9.1 to 9.5 parts of water-reducing agent, wherein the gravel comprises 700 to 750 parts of small gravel and 250 to 280 parts of big gravel, the grain size of the small gravel is 5 to 25 mm, and the grain sizeof the big gravel is 5 to 10 mm. In the scheme, adhesive adopts the cement, the coal ash and the micro-silicon powder, the gravel comprises big gravel and small gravel, the big gravel serves as aggregate, the small gravel is filled in the big gravel and is used for guaranteeing the structural strength of the concrete, the micro-silicon ash is used for enhancing the hardness of the concrete, the steel fiber is used for enhancing the toughness of the concrete, and the prepared concrete has good anti-cracking effect, is not liable to generate ash and has high structural strength.

Description

technical field [0001] The invention relates to concrete, in particular to a preparation process of CF50 concrete. Background technique [0002] Concrete refers to the cement concrete made of cement as the adhesive material, sand and stone as the aggregate, mixed with water in a certain proportion, and also called ordinary concrete, which can be widely used in civil engineering. [0003] Concrete has the characteristics of abundant raw materials, low price and simple production process, so its consumption is increasing. At the same time, concrete also has the characteristics of high compressive strength, good durability, and a wide range of strength grades. These characteristics make it widely used, not only in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal In engineering, etc., concrete is also an important material. [0004] According to GB / T50081-223 of my country's "Standards for Mechanical Properties of Ordinary...

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Problems solved by technology

[0005] However, the structural strength of this ordinary concrete is slightly lower than that of steel fiber reinforced concrete. Steel fiber reinforced concrete is a new type of multi-phase composite material formed by mixing random distributed short fibers into concrete. These random distributed The high-quality steel fiber can effectively prevent the expansion of micro-cracks and the formation of macro-cracks in concrete, and can significantly improve the tensile, bending, impact and fatigue properties of concrete; steel fibers have become more popular in recent years due to their good properties. It is widely used, and the number of vehicles in the parking lot is relatively dense, which requires the parking lot to have a certain strength of bearing capacity. Therefore, at present, some parking lots are poured with steel fiber concrete, and the existing concrete is only mixed with ordinary concrete. Steel fibers, but this kind of concrete is prone to ash and other phenomena during the rolling process of vehicles, which will cause unevenness on the concrete surface after a long time

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