A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses an alkali-free liquid accelerator and a preparation method thereof. The accelerator comprises, by mass, 30-60 parts of aluminum sulfate, 5-10 parts of calcium formate, 1.0-3.5 parts of methyl cellulose, 0.8-1.5 parts of polyacrylamide, 0.2-1.0 part of an organic acid, 1-3 parts of triethanolamine, 0.15-1.08 parts of an antifoaming agent, 0.5-1.5 parts of phosphoric acid and 30-50 parts of water. The organic acid is citric acid or oxalic acid. The antifoaming agent is dimethicone or polypropylene glycol. The alkali-free liquid accelerator has the adv no alkali metal ions, no corrosive or pungent smell, stable quality, good adaptability, low dosage, fast setting speed and high strength. The accelerator allows cement to initially set within 2min and to finally set within 5min when the dosage is 1-3%, and has good storage stability at -10-45DEG C.
The invention discloses an alkali-free liquid accelerator and a preparation method thereof. The accelerator comprises, by mass, 30-60 parts of aluminum sulfate, 5-10 parts of calcium formate, 1.0-3.5 parts of methyl cellulose, 0.8-1.5 parts of polyacrylamide, 0.2-1.0 part of an organic acid, 1-3 parts of triethanolamine, 0.15-1.08 parts of an antifoaming agent, 0.5-1.5 parts of phosphoric acid and 30-50 parts of water. The organic acid is citric acid or oxalic acid. The antifoaming agent is dimethicone or polypropylene glycol. The alkali-free liquid accelerator has the adv no alkali metal ions, no corrosive or pungent smell, stable quality, good adaptability, low dosage, fast setting speed and high strength. The accelerator allows cement to initially set within 2min and to finally set within 5min when the dosage is 1-3%, and has good storage stability at -10-45DEG C.
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