Calcium-alumino-silicate-hydrate nano-seeds suspension and preparation method thereof

A preparation method of calcium-alumino-silicate-hydrate nano-seeds suspension, including the following steps:

• dropwise adding an aqueous solution of calcium source, an aqueous solution of silicon source and an aqueous solution of aluminum source to a solution of polycarboxylate superplasticizer, adjusting a pH value to 10.0˜13.5, and continuously stirring to obtain the calcium-alumino-silicate-hydrate nano-seeds suspension, wherein the calcium to silicon molar ratio is 0.2 to 1.8, and the aluminum to silicon molar ratio is 0.01 to 1.0,
• wherein the stirring is carried out at a temperature of 5˜60° C. for 0.5˜24 h and nitrogen gas is supplied during the stirring to prevent carbonization;
• wherein raw materials for synthesizing polycarboxylate superplasticizer comprises methacrylic acid and methacrylate, wherein the methacrylic acid to methacrylate molar ratio is 2:1 to 10:1;
• wherein the polycarboxylate superplasticizer has a molecular weight of 10000 to 200000, a side chain contains containing 45 to 200 ethylene oxide units and a polymer dispersion index of 1.0 to 5.0;
• wherein the solution of polycarboxylate superplasticizer having a solid content of 30%-50% is obtained by the following steps:
• dispersing the polycarboxylate superplasticizer into water, and
• stirring at a speed of 200˜2000 r/min for 0.5˜2 h.