Cement hexavalent chromium reducing agent and preparation method thereof
A hexavalent chromium and reducing agent technology, applied in the field of building material additives, can solve problems such as reduction of reducibility, removal of crystal water, environmental and ecological impact, and achieve strong reducibility, strong high temperature stability and excellent effects
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Embodiment 1
[0031]This embodiment provides a hexavalent chromium reducing agent for cement. The raw materials of the reducing agent and their mass percentages are: 80% of silicon micropowder on the surface rich in hydroxyl groups and 20% of ferrous sulfate monohydrate.
[0032] The preparation method of the cement hexavalent chromium reducing agent in this embodiment is as follows: ferrous sulfate is configured into a saturated solution, then sprayed on the surface of the silica micropowder, and granulated after high-speed stirring to obtain the cement hexavalent chromium reducing agent.
Embodiment 2
[0034] This embodiment provides a hexavalent chromium reducing agent for cement. The raw materials of the reducing agent and their mass percentages are: 70% of nano-silica on a hydroxyl-rich surface, 20% of ferrous sulfate monohydrate and 10% of ferrous sulfate heptahydrate.
[0035] The preparation method of the cement hexavalent chromium reducing agent in this embodiment is as follows: ferrous sulfate is configured into a saturated solution, then sprayed on the surface of nano-silica, and granulated after high-speed stirring to obtain the cement hexavalent chromium reducing agent.
Embodiment 3
[0037] This embodiment provides a hexavalent chromium reducing agent for cement. The raw materials of the reducing agent and their mass percentages are: 30% of nano-silica on a hydroxyl-rich surface, 40% of glass microbeads on a hydroxyl-rich surface, and 20% of ferrous sulfate monohydrate. % and ferrous sulfate heptahydrate 10%.
[0038] The preparation method of the cement hexavalent chromium reducing agent in this embodiment is as follows: ferrous sulfate is configured into a saturated solution, then sprayed on the surface of the mixed nano-silica and glass microbeads, and granulated after high-speed stirring to obtain cement hexavalent Chromium reducing agent.
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