Liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete, and preparation method and application thereof

1. A liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete, comprising the following ingredients in parts by weight: 75 parts to 85 parts of hyperdispersant; 5 parts to 10 parts of anti-mud agent; 1 part to 3 parts of shrinkage reducing ingredient; 10 parts to 20 parts of reinforcing ingredient; and 0.05 part to 0.1 part of foam stabilizing ingredient;

wherein, preparation of the hyperdispersant comprises: mixing a monomer with water to obtain a solution A; mixing a reducing agent and a chain transfer agent with water to obtain a solution B; mixing polyether with water, heating the mixture, adding an initiator, stirring the mixture at normal temperature, adding the solution A and the solution B, heating and polymerizing the mixture, and adding a pH regulator to regulate a pH value to be 7 to 9, so as to obtain the hyperdispersant;

the hyperdispersant comprises the following ingredients in parts by weight: 20 parts to 40 parts of monomer; 0.2 part to 2 parts of reducing agent; 0.8 part to 4 parts of chain transfer agent; 160 parts to 200 parts of polyether; 2 parts to 5 parts of initiator; 5 parts to 8 parts of pH regulator; and 200 parts to 300 parts of water;

the monomer is one or more of acrylic acid, acrylamide and aspartic acid; the reducing agent is one or more of vitamin C and sodium hypophosphite; the chain transfer agent is one or more of mercaptoacetic acid and mercaptopropionic acid; the polyether is one or more of methyl polyethylene glycol ether, allyl polyethylene glycol ether, 2-methylpropyl-2-alkenyl polyethylene glycol ether, 3-methylbutyl-3-alkenyl polyethylene glycol ether and 4-hydroxybutyl vinyl ether; the initiator is one or more of hydrogen peroxide and ammonium persulfate; and the pH regulator is one or more of sodium hydroxide and potassium hydroxide;

the shrinkage reducing ingredient is one or more of anhydrous aluminum sulfate and anhydrous magnesium sulfate; and

the reinforcing ingredient is one or more of triethanolamine, triisopropanolamine, calcium formate, sodium carbonate and calcium nitrate.

2. The liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete according to claim 1 , wherein the anti-mud agent is one or more of quaternary ammonium salt clay stabilizer, potassium nitrate and diethylenetriamine penta(methylene phosphonic acid) heptasodium.

3. The liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete according to claim 1 , wherein the foam stabilizing ingredient is one or more of polyacrylamide, polyvinyl alcohol, hydroxypropyl methyl cellulose, dispersible emulsion powder and polyethoxylated silicone emulsion.

4. A preparation method of the liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete according to claim 1 , comprising the following steps of:

step 1: preparing the hyperdispersant with a solid content of 40% to 45%, a water reducing rate of more than 45% and a pH value of 7 to 9; and

step 2: sequentially adding the anti-mud agent, the shrinkage reducing ingredient, the reinforcing ingredient and the foam stabilizing ingredient into the hyperdispersant by weighing at a ratio, feeding each material at an interval of 25 minutes to 35 minutes, and stirring the mixture at normal temperature for 4.5 hours to 5 hours after feeding to obtain the liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete.