Volume stabilizer for cement-based composite material and preparation method thereof
A volume stabilizer and composite material technology, applied in the field of volume stabilizer for cement-based composite materials, can solve the problems of failure to compensate for shrinkage, easy generation and development of cracks, delayed ettringite, etc., and achieve good dispersibility, low product cost, The effect of enhancing dispersion
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[0022] The present invention will be further described below in conjunction with specific examples.
[0023] A volume stabilizer for cement-based composite materials, consisting of the following components in parts by weight:
[0024] Periclase 200
[0025] Polycarboxylate 20
[0026] Polyacrylate 30
[0027] Sodium polyphosphate 1
[0028] Among them, the periclase is finely ground and passed through a 85um sieve.
[0029] In the described periclase, the content of magnesium oxide is 50%-80%, the content of calcium oxide is 10%-20%, the content of silicon dioxide is ≤15%, the content of aluminum oxide is 5%-10%, and the loss on ignition is ≤10%. %, other ≤ 3%, the above are percentages by weight.
[0030] A preparation method of the above-mentioned cement-based composite material volume stabilizer, comprising the steps of:
[0031] a. Using magnesite as raw material, grind it finely, and the sieve residue of 85um is ≤10%;
[0032] b. Then calcinate the finely ground ma...
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