| abstract |
The invention discloses an alkali-free high-strength concrete quick-setting agent, which comprises the following components in weight percentage: Portland cement 11%-20%, alumina clinker powder 13%-19%, naphthalenesulfonic acid formaldehyde condensate 5%‑11%, bentonite 6%‑12%, fly ash 15%‑21%, gypsum 5%‑11%, zinc sulfate 1%‑7%, sodium aluminate 1%‑2%, sodium carbonate 2% ‑8%, hydroxypropyl methylcellulose 4%‑10%, silicon powder 6%‑12%. The concrete quick-setting agent of the present invention, its setting time is short, can make concrete initial setting within 3min, final setting within 8min, just can produce strength in 0.8h and later stage strength develops slowly, and early strength and later stage strength are all high; Concrete is homogeneous Good resistance, strong impermeability, less dust, small rebound; no alkali and no chlorine, no corrosion effect on steel bars, good adaptability to cement. |