A kind of slope protection prefabricated component concrete containing iron tailings and its preparation method

Abstract

The invention discloses an iron tailing-containing slope protection prefabricated component concrete and a preparation method thereof. The iron tailing-containing slope protection prefabricated component concrete per cubic meter comprises the following components: an iron tailing sand aggregate, cement, iron tailing powder, fly ash, silica fume, a polycarboxylate superplasticizer, a de-foaming agent and water; the iron tailing powder is obtained by finely grinding residual parts after part of iron tailing sand raw materials is selected as the iron tailing sand aggregate. The slope protection prefabricated component concrete disclosed by the invention has the characteristics of being large in degree of collapse and expansion, high in strength, free from steam curing, high in early strengthand good in carbonation and corrosion resistance; as tailing sand is taken as the aggregate, and part of the fly ash is replaced with the finely-ground iron tailing powder, the production cost is reduced, and an environmental protection value is realized; vibration-free molding is realized, the energy is saved, the noise is reduced, and the fatigue damage generated by a vibrator to a steel mold isavoided; through one-time overall blanking, the working cycle is shortened, and the working difficulty is reduced; a super early strength agent replaces the steam curing, so that the production efficiency is improved.

Description

technical field [0001] The invention relates to, in particular, a slope protection prefabricated component concrete containing iron tailings and a preparation method thereof. Background technique [0002] According to statistics, the total amount of iron tailings in my country is about 7 billion tons, and a large amount of iron tailings has caused many problems to the mining industry, the environment and the economy. According to SiO in silicon-rich iron tailings 2 The content of iron tailings is high, and the chemical composition is close to the characteristics of building materials. Domestic scholars and enterprises have carried out a large number of ways to utilize iron tailings, but the average utilization rate does not exceed 10%, which fails to solve the problem fundamentally. Invention patent CN102850011A "A Process for Preparing Active Powder Concrete Using Iron Tailings" discloses a method of using mechanochemical activation of SiO 2 Iron tailings with a content o...

AI Technical Summary

Problems solved by technology

Invention patents CN 2271570Y "A Prefabricated Component for Assembled Slope Protection" and CN 203559393U "A Prefabricated Component for River Slope Protection" disclose two different prefabricated components for slope protection from the perspective of component molds, which reduce the difficulty of the construction process to a certain extent. However, in actual production, common phenomena such as honeycomb, pitted surface, air holes, cracks, and sand spots are mainly caused by concrete quality (due to insufficient fluidity of concrete, aggregate settlement, poor cohesion, etc.) , so the quality problem of slope protection prefabricated components has not been fundamentally solved

[0005] In the prior art, the preparation principle of reactive powder concrete has never been applied to the slope protection prefabricated component concrete. Therefore, it is necessary to develop a slope protection prefabricated component reactive powder concrete containing iron tailings and its preparation method, so that it has high strength and excellent durability. The performance can ensure that the slope protection prefabricated components can withstand water washing, carbonization, salt substances and microbial corrosion

Images