Concrete aggregate prepared by utilizing coal gangue and preparation method thereof
A technology of concrete aggregate and coal gangue, which is applied in the field of building materials, can solve the problems of low aging resistance and weather resistance, aggregates are not easy to scatter, and low service life, and achieve high aging resistance and weather resistance, not easy to scatter, and save construction costs. Effect
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Embodiment 1
[0023] A concrete aggregate prepared from coal gangue, the concrete aggregate is made of the following raw materials in parts by weight: 110 parts of coal gangue fragments, 50 parts of foundry waste sand, 10 parts of copper mud, 10 parts of red mud, 50 parts of regenerated diatomite fragments, 5 parts of additives, 6 parts of calcium hydroxide and 5 parts of sodium hydroxide solution with a mass concentration of 0.5mol / L, wherein the regenerated diatomite fragments are in parts by weight It is made of 40 parts of slurry waste diatomite, 20 parts of modified steel slag fine powder, 6 parts of surface modifier and 0.04 part of foaming agent. Made of sodium borate.
[0024] The surface modifying agent is composed of sodium hydroxide solid, calcium sulfate dihydrate, potassium methyl silicate, lignin coupling agent and titanate coupling agent in a weight ratio of 3:3:2.5:2.5:3.5.
[0025] The additive is composed of barium stearate, flame retardant fiber and polyimide fiber with ...
Embodiment 2
[0034]A concrete aggregate prepared from coal gangue, the concrete aggregate is made of the following raw materials in parts by weight: 130 parts of coal gangue fragments, 60 parts of foundry waste sand, 15 parts of copper mud, 15 parts of red mud, 60 parts of regenerated diatomite fragments, 7 parts of additives, 8 parts of calcium hydroxide and 7 parts of sodium hydroxide solution with a mass concentration of 0.5mol / L, wherein the regenerated diatomite fragments are in parts by weight It is made of 50 parts of slurry waste diatomite, 25 parts of modified steel slag fine powder, 9 parts of surface modifier and 0.05 part of foaming agent. Made of sodium borate.
[0035] The surface modifying agent is composed of solid sodium hydroxide, calcium sulfate dihydrate, potassium methyl silicate, lignin coupling agent and titanate coupling agent in a weight ratio of 3.5:3.5:2:2:3.5.
[0036] The additive is composed of barium stearate, flame retardant fiber and polyimide fiber with a...
Embodiment 3
[0045] A concrete aggregate prepared from coal gangue, the concrete aggregate is made of the following raw materials in parts by weight: 150 parts of coal gangue fragments, 70 parts of foundry waste sand, 20 parts of copper mud, 20 parts of red mud, 70 parts of regenerated diatomite fragments, 9 parts of additives, 10 parts of calcium hydroxide and 9 parts of sodium hydroxide solution with a mass concentration of 0.5mol / L, wherein the regenerated diatomite fragments are in parts by weight It is made of 60 parts of slurry waste diatomite, 30 parts of modified steel slag powder, 11 parts of surface modifier and 0.06 part of foaming agent. The modified steel slag powder is made of steel slag and partial Made of sodium borate.
[0046] The surface modifier is composed of solid sodium hydroxide, calcium sulfate dihydrate, potassium methyl silicate, lignin coupling agent and titanate coupling agent in a weight ratio of 3.5:3:2.5:2.5:3.5.
[0047] The additive is composed of barium ...
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