Cement-based composite material suitable for 3D printing rapid-forming process
A molding process and 3D printing technology, applied in the field of building materials, can solve the problems of abnormal coagulation, reduced strength, complex ratio composition, etc., and achieve the effect of high early strength, improved strength, and satisfying setting time.
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Embodiment 1
[0033] (1) In parts by weight, weigh 100 parts of ordinary Portland cement of grade 42.5, 155 parts of fine aggregate, 0.08 part of Wenlun rubber, 1.5 parts of EVA redispersible latex powder, 0.9 part of sepiolite, and 10 parts of strong shrinkage reducing agent are put into a mixer and mixed to obtain ready-mixed dry powder.
[0034] (2) Fully stir and dissolve aluminum sulfate and water at a mass ratio of 1:1 to prepare a liquid as a liquid coagulation accelerator component. Weigh 0.7 parts of the liquid coagulation accelerator component for use.
[0035] (3) In parts by weight, 38 parts of mixing water were weighed, and 0.9 part of 40% polycarboxylate superplasticizer was added to the pre-mixed dry powder in step (1) and fully stirred and mixed.
[0036] (4) Pump the cement-based material prepared in step (3) to the construction 3D printer, add the liquid coagulation accelerator component prepared in step (2) at the extrusion port, stir and mix well, and then extrude suita...
Embodiment 2
[0040] (1) In parts by weight, weigh 100 parts of ordinary Portland cement of grade 52.5, 200 parts of fine aggregate, 20 parts of strength reducing agent, 6.0 parts of EVA redispersible latex powder, hydroxypropyl methyl Put 0.1 part of cellulose ether and 1.0 part of diatomaceous earth into a mixer and mix and stir to obtain a ready-mixed dry powder.
[0041] (2) Fully stir and dissolve aluminum sulfate, diethanolamine and water at a mass ratio of 4.5:0.5:5.0 to prepare a liquid as a liquid coagulation accelerator component. Weigh 2.4 parts of liquid coagulation accelerator components for later use.
[0042] (3) In parts by weight, weigh 35 parts of mixing water and 0.2 parts of polycarboxylate superplasticizer into the pre-mixed dry powder in step (1) and fully stir and mix.
[0043] (4) Pump the cement-based material prepared in step (3) to the construction 3D printer, add the liquid coagulation accelerator component prepared in step (2) at the extrusion port, stir and mi...
Embodiment 3
[0049] (1) In parts by weight, weigh 100 parts of ordinary Portland cement of 42.5R grade, 180 parts of fine aggregate, 10 parts of EVA redispersible latex powder, 0.02 parts of carboxymethyl cellulose, 14.00 parts of agent and 1.5 parts of polypropylene fiber were put into a blender and mixed to obtain ready-mixed dry powder.
[0050] (2) In terms of parts by mass, aluminum sulfate, diethanolamine and water are fully stirred and dissolved at a mass ratio of 3.5:1.5:5.0 to prepare a liquid as a liquid coagulation accelerator component. Weigh 2.5 parts of liquid coagulation accelerator components for later use
[0051] (3) In parts by weight, weigh 40 parts of mixing water and 0.07 parts of polycarboxylate superplasticizer into the pre-mixed dry powder in step (1) and fully stir and mix.
[0052] (4) Pump the cement-based material prepared in step (3) to the construction 3D printer, add the liquid coagulation accelerator component weighed in step (2) at the extrusion port, sti...
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