Cement material fly-ash activity excitant

Abstract

The activity excitant for flyash as cementing material may be used to make the flyash adding amount as high as 70 % without affecting the early strength of cement and concrete. The activity excitant consists of iron powder in 20-50 wt%, calcium oxide in 20-40 wt%, densifying agent 0.05-0.5 wt% and flyash 10-40 wt%, and is added into cement and concrete in the amount of 1-3 % of cementing material. The production process includes air drying and sieving iron powder, milling calcium oxide to obtain calcium oxide powder, and mixing the said material in the said ratio.

Description

Technical field: [0001] The invention relates to the technical field of chemical industry, in particular it is a cementing material fly ash active stimulator. Background technique: [0002] In recent years, fly ash has been widely used in the construction industry to produce cement and aerated concrete blocks, which not only reduces the cost of building materials, but also provides a broad way for the utilization of fly ash discharged from thermal power plants. Because the coal ash discharged from thermal power plants across the country is more than 80 million tons per year, some of which are piled up in farmland and some are discharged into rivers, which has become a major public hazard. Using fly ash as the basic material of roads and buildings, Or as building materials, turning waste into treasure is a great contribution made by engineers. Chinese patent numbers: 86105445, 87100904, and 89107256 respectively disclose the titles "Using pulp mud and fly ash to produce Port...

AI Technical Summary

Problems solved by technology

Existing fly ash activators, such as the activator developed by Shanghai Research Institute of Chemical Industry, the HB activator developed by Anhui University, and the LZ activator developed by Nanchang University, have an unsatisfactory activation effect. not ideal

Chinese patent number: 01112590 discloses an invention patent named "fly ash activator", which is made by mixing calcium oxide, sodium metasilicate, sodium fluorosilicate and sodium tripolyphosphate in a certain proportion , the cost is higher and the process is more complicated

However, due to the influence of the poor activity of fly ash itself, the application of fly ash is subject to many restrictions.

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