Hybrid fiber cement-based composite material for 3D printing and preparation method thereof
A technology of hybrid fibers and composite materials, which is applied in the direction of additive processing to optimize the pore structure of the system, improve mechanical properties, and reduce early cracking and shrinkage.
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Embodiment 1
[0025] A hybrid fiber cement-based composite material for 3D printing, which is prepared from raw materials with the following weight components: 4.11 parts of ordinary Portland cement, 0.17 parts of sulphoaluminate cement, 0.48 parts of silica fume, and 3.81 parts of sand and gravel 0.10 parts of calcium carbonate whiskers, 0.006 parts of polyvinyl alcohol fiber, 0.01 parts of rheological agent, 1.43 parts of water, and 0.035 parts of water reducing agent.
[0026] First add the ordinary Portland cement, sulphoaluminate cement, silica fume, sandstone, calcium carbonate whisker and rheological agent into the mixer, and stir the dry powder at a uniform speed of 140rpm for 2-3min until it is completely mixed, and then Slowly add the formulated amount of water and water reducer to the mixture, and stir at a constant speed of 140rpm for 4 minutes; then slowly add the formulated amount of polyvinyl alcohol fiber into the mixture, and stir at a constant speed of 420rpm for 60-90s, an...
Embodiment 2
[0029] A hybrid fiber cement-based composite material for 3D printing, which is prepared from the following raw materials by weight: 4.29 parts of ordinary portland cement, 0 parts of sulphoaluminate cement, 0.95 parts of silica fume, and 3.85 parts of sand and gravel 0.10 parts of calcium carbonate whiskers, 0.005 parts of polyvinyl alcohol fiber, 0.01 parts of rheological agent, 1.43 parts of water, and 0.035 parts of water reducing agent.
[0030] First add the ordinary Portland cement, sulphoaluminate cement, silica fume, sandstone, calcium carbonate whisker and rheological agent into the mixer, and stir the dry powder at a constant speed of 140rpm for 2-3min until it is completely mixed, and then Slowly add the formulated amount of water and water reducer to the mixture, and stir at a constant speed of 140rpm for 4 minutes; then slowly add the formulated amount of polyvinyl alcohol fibers into the mixture, and stir at a constant speed of 420rpm for 60-90s to prepare the T...
Embodiment 3
[0033] A hybrid fiber cement-based composite material for 3D printing, which is prepared from the following raw materials by weight: 4.76 parts of ordinary Portland cement, 0.21 parts of sulphoaluminate cement, 0.10 parts of silica fume, and 3.80 parts of sand and gravel 0.15 parts of calcium carbonate whiskers, 0.005 parts of polyvinyl alcohol fiber, 0.005 parts of rheological agent, 1.45 parts of water, and 0.032 parts of water reducing agent.
[0034]First add the ordinary Portland cement, sulphoaluminate cement, silica fume, sandstone, calcium carbonate whisker and rheological agent into the mixer, and stir the dry powder at a uniform speed of 140rpm for 2-3min until it is completely mixed, and then Slowly add the formulated amount of water and water reducer to the mixture, and stir at a constant speed of 140rpm for 4 minutes; then slowly add the formulated amount of polyvinyl alcohol fiber into the mixture, and stir at a constant speed of 420rpm for 60-90s, and the product...
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