Cement additive

[0016] A cement additive, made from the following raw materials in parts by weight: 35 parts of triisopropanolamine, 2 parts of triethanolamine, 10 parts of dispersible polymer, 8 parts of polycarboxylate water reducer, and 1 part of short chemical fiber , 15 parts of bentonite, 1 part of sodium polyacrylate, and 1 part of reinforcing agent, wherein the reinforcing agent is mixed with slag and limestone in a weight ratio of 1:1, and its particle size is 200 mesh.

[0017] The method for preparing the cement additive is:

[0018] 1) Mix triisopropanolamine, triethanolamine and sodium polyacrylate according to the measurement, and dissolve them in water, stir evenly, concentrate, and then dry to obtain powder a;

[0019] 2) Add the polycarboxylate superplasticizer into the bentonite according to the measurement, stir evenly and dry at 100°C for 2 hours, grind it into a powder with a particle size of 300 mesh, then add the dispersible polymer and step 1) to obtain Mix the powder...

[0022] A cement additive, made from the following raw materials in parts by weight: 20 parts of triisopropanolamine, 10 parts of triethanolamine, 25 parts of dispersible polymer, 2 parts of polycarboxylate water reducer, 7 parts of short chemical fiber , 8 parts of bentonite, 5 parts of sodium polyacrylate, and 5 parts of reinforcing agent, wherein the reinforcing agent is mixed with slag and limestone in a weight ratio of 1:1, and its particle size is 300 mesh.

[0023] The method for preparing above-mentioned cement additive is:

[0024] 1) Mix triisopropanolamine, triethanolamine and sodium polyacrylate according to the measurement, and dissolve them in water, stir evenly, concentrate, and then dry to obtain powder a;

[0025] 2) Add the polycarboxylate superplasticizer into the bentonite according to the measured amount, stir evenly and dry at 160°C for 0.5 hours, grind it into a powder with a particle size of 200 mesh, then add the dispersible polymer and step 1) to obtai...

[0028] A cement additive, made from the following raw materials in parts by weight: 30 parts of triisopropanolamine, 7 parts of triethanolamine, 20 parts of dispersible polymer, 5 parts of polycarboxylate water reducer, 3 parts of short chemical fiber , 11 parts of bentonite, 4 parts of sodium polyacrylate, and 3 parts of reinforcing agent, wherein the reinforcing agent is mixed with slag and limestone in a weight ratio of 1:1, and its particle size is 300 mesh.

[0029] The method for preparing the cement additive is the same as in Example 2.