Geopolymer concrete based on household garbage incinerator slag and red mud and preparation method thereof

Abstract

The invention discloses geopolymer concrete based on household garbage incineration slag and red mud and a preparation method of the geopolymer concrete, and the preparation method comprises the following steps: respectively carrying out first pretreatment on the household garbage incineration slag and the red mud to obtain first pretreated slag and first pretreated red mud, then carrying out second pretreatment to obtain second pretreated slag and second pretreated red mud, uniformly mixing the first pretreated furnace slag, the first pretreated red mud and the municipal dewatered sludge, granulating to obtain a green body, drying the green body, then carrying out first heating, then cooling to obtain porous lightweight aggregate ceramsite, carrying out second heating on the second pretreated red mud, then cooling so that modified red mud is obtained, uniformly mixing the second pretreated furnace slag, the modified red mud and an alkali activator to obtain geopolymer powder, adding water into the geopolymer powder, uniformly mixing, adding the porous lightweight aggregate ceramsite, and uniformly mixing to obtain the geopolymer concrete. The utilization rate of red mud, waste incineration slag and municipal sludge can be increased, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a geopolymer concrete based on domestic waste incineration slag and red mud and a preparation method thereof. Background technique [0002] Both red mud and domestic waste incineration slag (MSWI bottom ash) are solid wastes, among which red mud is a by-product of industrial production of alumina. For every ton of alumina produced, there are 1-2 tons of red mud produce. The particles of red mud are small, and the particles with a particle size of less than 75 μm account for more than 90% of the total. The fine particles are very likely to cause harm to the surrounding environment. Because the production process of alumina requires the use of a large amount of alkali, the red mud has a strong alkalinity. In addition, the red mud also contains some rare earth elements and trace radioactive elements such as radium, potassium, and plating. Due to the spe...

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Problems solved by technology

[0006] However, in the prior art, there is no relevant report on the resource utilization of red mud and domestic waste incineration slag for the preparation of building materials.

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