Calcium-base geopolymer and preparation method thereof

Abstract

The invention discloses a calcium-base geopolymer and a preparation method thereof. Granulated blast-furnace cinder, metakaolin and fly ash used as main raw materials are utilized to prepare the calcium-base geopolymer by using liquid water glass as an alkaline excitant under normal temperature conditions without high-temperature calcination. The calcium-base geopolymer is prepared from 70-90% of granulated blast-furnace cinder, 0-30% of fly ash and 0-30% of metakaolin. The alkaline excitant adopts the liquid water glass which accounts for 2-10 wt% of the multielement composite powder. Compared with the prior art, by using the granulated blast-furnace cinder, fly ash and metakaolin as the main raw materials, the calcium-base geopolymer has the advantages of low production cost and energy consumption, and embodies the idea of sustainable development on greenness and cyclic utilization. The preparation process does not need high-temperature calcination, and the calcium-base geopolymer can be prepared at normal temperature, thereby greatly saving the production cost and lowering the energy consumption. In the production process, the emissions of CO2 and other greenhouse gases are very low. The calcium-base geopolymer prepared at normal temperature has excellent mechanical properties and broad market application prospects.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a calcium-based polymer and a preparation method thereof. Background technique [0002] Since the invention of Portland cement in 1824, its large-scale application has promoted the great development of human society, but at the same time, it has also produced some urgent environmental problems, which seriously threaten the living environment of human beings. The traditional Portland cement adopts the "two grinding and one burning" process, which consumes a large amount of non-renewable energy such as oil, coal and natural gas, and its energy consumption accounts for about 15% of the world's total energy consumption; at the same time, it also emits a large amount of greenhouse gas CO 2 , causing the global average temperature to rise year by year, which will lead to a series of environmental problems and huge disasters such as rising sea levels and increasing pests and diseases o...

AI Technical Summary

Problems solved by technology

However, the prior art shows that some alkali-activated cementitious materials have the following disadvantages: although the alkali-slag cement prepared with a single slag component has high strength and good early strength, its reaction products are mostly inorganic mineral oligomers, and its cement The shrinkage and brittleness of stone are relatively large, so its durability is affected to a certain extent; the alkali-activated cementitious materials prepared from materials such as metakaolin or fly ash, although the reaction product is an inorganic mineral polymer, has good durability. But it requires a higher curing temperature, and its cement stone strength is lower at room temperature

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