Formula and preparation process of concrete sulfate resistance agent

Abstract

The invention relates to a formula of a concrete sulfate resistance agent, which comprises the following ingredients by weight percentage: one or more of 30% to 50% ferric nitrate, ferrous nitrate and magnesium nitrate, 20% to 40% barium nitrate, 0.5% to 10% sodium silicate, 5% to 10% lithium hydroxide, 1% to 5% sodium benzoate and 30% to 60% coal ash or grounded mineral powder. A preparation process of the concrete sulfate resistance agent comprises the following steps of: mixing one or more of 30% to 50% ferric nitrate, ferrous nitrate and magnesium nitrate, 20% to 40% barium nitrate, 0.5% to 10% sodium silicate, 5% to 10% lithium hydroxide, 1% to 5% sodium benzoate and 30% to 60% coal ash or grounded mineral powder in a mixer or a mixing tank for 5 to 30 minutes, discharging the materials, sealing and preserving. The sulfate resistance coefficient of the concrete sulfate resistance agent can reach 95% to 98%, so that the impervious and the freeze proof levels of the concrete are greatly improved, and the service durability of the concrete is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a formulation and a preparation process of a concrete sulfate corrosion resistance agent. technical background [0002] Concrete is currently the most important building material in civil engineering and water conservancy engineering, and the service life of concrete buildings has become a hot issue that people pay attention to in recent years. The durability of concrete is not only related to factors such as design and construction, but also closely related to the environment in which concrete is located. Sulfate ions in ambient water or groundwater around concrete are one of the most important factors affecting the durability of concrete. Sulphate ions attack concrete, causing the concrete surface to be corroded and peeled off, which is very common. Especially in places where the concentration of sulfate ions is high, if ordinary concrete without any preventive mea...

AI Technical Summary

Problems solved by technology

With the development of modern concrete technology, some people have added a large amount of mineral powder and fly ash to the concrete, which can inhibit the erosion of sulfate on concrete to a certain extent, but the addition of a large amount of mineral powder and fly ash has affected Freeze-thaw resistance of concrete, the effect is still unsatisfactory

Polymer concrete has excellent performance in inhibiting sulfate attack, but the engineering cost is too high, and due to the existence of a large amount of organic matter, the aging problem of concrete is difficult to solve