UHPC suitable for long-term sewage environment and preparation process thereof

Abstract

The invention provides UHPC suitable for a long-term sewage environment and a preparation process thereof. The UHPC comprises the following components: water, cement, fine aggregate, a mineral admixture, metal fibers, an additive and an antibacterial agent, wherein the antibacterial agent is beta-type phthalocyanine blue with a particle size of 0.005-0.015 [mu]m, and the cement is a mixture of ordinary Portland cement and calcium aluminate cement. According to the invention, the antibacterial agent phthalocyanine blue matched with UHPC is creatively introduced, and the high performance of the UHPC is combined, so that the material has good biological corrosion resistance, and the flowability and the strength of the material are improved; part of calcium aluminate cement is used for replacing ordinary Portland cement, so that the UHPC has a relatively low biological erosion rate, and the erosion-resistant period of the UHPC is further prolonged; and the UHPC is more suitable for serving under the working condition of sewage and waste treatment, the corrosion resistance of components can be greatly improved, the service life of the structure is prolonged, the later maintenance cost is reduced, and the UHPC has wide market prospects.

Description

technical field [0001] The invention relates to the field of building material anticorrosion technology, in particular to a UHPC suitable for long-term sewage environments and a preparation process thereof. Background technique [0002] As the most widely used building material at present, concrete plays an important role in urban construction, production development and the improvement of human living standards. However, there are certain defects in the concrete in the prior art: because the concrete has a certain water permeability, it cannot protect the steel bars well in the environment where salts exist, and the chloride salts will cause the steel bars to corrode, and then cause structural damage; and When sulfate enters the interior of the concrete, salt expansion damage often occurs. At the same time, although concrete is composed of inorganic materials, bacteria such as sulfur oxidizing bacteria (SOB) and sulfate reducing bacteria (SRB) can still corrode concrete. T...

AI Technical Summary

Problems solved by technology

However, there are certain defects in the concrete in the prior art: because the concrete has a certain water permeability, it cannot protect the steel bars well in the environment where salts exist, and the chloride salts will cause the steel bars to corrode, and then cause structural damage; and Sulfate enters the interior of the concrete, often causing salt swelling damage

However, strong acid environment can cause corrosion to UHPC. Strong acid and strong alkali are discharges prohibited by the state. They hardly exist in production and domestic waste. Only sulfur oxidizing bacteria (SOB) and sulfate reducing bacteria exist in the environment. (SRB) and other bacterial metabolism will form biological sulfuric acid, and these substances will cause erosion damage to UHPC

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