High-strength composite fiber expansion anti-cracking agent and preparation process thereof
A technology of composite fiber and anti-cracking agent, which is applied in the field of concrete admixtures to achieve the effect of improving mechanical properties, improving space filling compactness and good expansion fineness
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Embodiment 1
[0025] A high-strength composite fiber expansion anti-cracking agent, including CaO-MgO-Al 2 o 3 -SO 3 Expansion source, fibrous aggregate ore powder, modified fiber doped polymer sol solution, wherein, in terms of mass percentage, CaO-MgO-Al 2 o 3 -SO 3 50% of the expansion source, 25% of the ore powder of the fibrous aggregate, and 20% of the modified fiber doped polymer sol.
[0026] Further, 5% of dispersant is also included, and the dispersant is composed of hydroxypropyl methylcellulose and calcium fluorophosphate with a mass ratio of 1:0.2.
[0027] Among them, the ore powder of fibrous aggregates includes activated gypsum powder and wollastonite powder, the mass ratio of the two is 1:0.5, passed through a 800-mesh sieve, and the sieve residue is less than 5%. The preparation method of activated gypsum powder is as follows:
[0028] Take gypsum powder and grind it to pass through a 400 mesh sieve, then add citric acid to it, the amount of citric acid added is 5.3w...
Embodiment 2
[0035] A high-strength composite fiber expansion anti-cracking agent, including CaO-MgO-Al 2 o 3 -SO 3 Expansion source, fibrous aggregate ore powder, modified fiber doped polymer sol solution, wherein, in terms of mass percentage, CaO-MgO-Al 2 o 3 -SO 3 Expansion source 48%, fibrous aggregate ore powder 28%, modified fiber doped polymer sol 18%.
[0036] Further, 6% of dispersant is also included, and the dispersant is composed of hydroxypropyl methylcellulose and calcium fluorophosphate with a mass ratio of 1:0.1.
[0037] Among them, the ore powder of fibrous aggregates includes activated gypsum powder and wollastonite powder, the mass ratio of the two is 1:0.5, passed through a 800-mesh sieve, and the sieve residue is less than 5%. The preparation method of activated gypsum powder is as follows:
[0038] Take the gypsum powder and grind it to pass through a 400 mesh sieve, then add citric acid to it, the amount of citric acid added is 5.4wt% of the mass of the gypsum...
Embodiment 3
[0045] A high-strength composite fiber expansion anti-cracking agent, including CaO-MgO-Al 2 o 3 -SO 3 Expansion source, fibrous aggregate ore powder, modified fiber doped polymer sol solution, wherein, in terms of mass percentage, CaO-MgO-Al 2 o 3 -SO 3 Expansion source 45%, fibrous aggregate ore powder 25%, modified fiber doped polymer sol 22%.
[0046] Further, 8% of dispersant is also included, and the dispersant is composed of hydroxypropyl methylcellulose and calcium fluorophosphate with a mass ratio of 1:0.5.
[0047] Among them, the ore powder of fibrous aggregates includes activated gypsum powder and wollastonite powder, the mass ratio of the two is 1:0.5, passed through a 800-mesh sieve, and the sieve residue is less than 5%. The preparation method of activated gypsum powder is as follows:
[0048] Take gypsum powder and grind it to pass through a 400 mesh sieve, then add citric acid to it, the amount of citric acid added is 4.2wt% of the mass of gypsum powder,...
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