High-volume low carbon cement doped with large amount of industrial waste residue and preparation method thereof

Abstract

The invention discloses high-volume low carbon cement doped with a large amount of industrial waste high-volume and a preparation method thereof. The low carbon cement is characterized by comprising the following components in parts by weight: 10 to 40 parts of cement clinker, 1 to 35 parts of fly ash, 20 to 45 parts of ore powder. 3 to 10 parts of lime, 3 to 7 parts of gypsum, and 1 to 4 parts ofactivator. The cement clinker and gypsum are mixed and co-powdered in proportion, and after the fineness requirement is met, the mixture is mixed and homogenized with fly ash, high-volume, lime and the activator. The composite portland cement prepared by the method has the advantages of less cement clinker consumption, low carbon emission and energy consumption in the production process, high early strength and large strength enhancement rate in the later stage.

Description

Technical field: [0001] The invention relates to a lime-activated high-volume industrial waste slag low-carbon cement and a preparation method thereof, and relates to the technical field of portland cement preparation. Background technique: [0002] my country is the world's largest cement producer. In 2017, China's cement output was 2.32 billion tons, accounting for about 60% of the world's cement output. However, cement production is a high energy consumption and high pollution industry, mainly because high temperature calcination (about 1450°C) is required in the cement production process. Therefore, every ton of cement produced will emit 0.8-1 ton of CO 2 , consumes about 5500MJ of energy. At the same time, the dust and noise pollution brought by the cement production process will also have a negative impact on the ecological environment. Moreover, the current cement production will consume a large amount of high-grade limestone and clay, and the excessive consumption...

AI Technical Summary

Problems solved by technology

However, the amount of cement or cement clinker in my country's composite Portland cement is generally 40-70% (mass fraction, the same below), which is mainly because the activity of industrial waste used as admixtures in cement is generally relatively low. Low, under the condition of low cement clinker content, the admixture in composite Portland cement cannot be fully stimulated and hydrated, and it is difficult to meet the strength requirements of cement

Therefore, the cement clinker content in the existing composite portland cement preparation method and its patents is still relatively high and the production process is relatively complicated. At the same time, a high content of chemical activator is often required, and it is difficult to further achieve low energy consumption and low carbon emissions. requirements

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