3D printing functionally graded concrete material for anti-tandem warhead and its preparation method
A 3D printing and functional gradient technology, which is applied in manufacturing tools, additive processing, ceramic molding machines, etc., can solve the problems of insufficient strength to meet military protection projects, low strength, and poor early strength, so as to improve comprehensive protection capabilities and improve Efficiency and the effect of saving construction costs
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Embodiment 1
[0041] Select 45.0% by weight of yellow sand, 22.5% of cement, 13.5% of slag powder, 9.0% of silica fume, 0.135% of retarder, 0.0202% of starch ether, 0.0202% of cellulose ether, and 0.090% of thixotropic lubricant and mix them evenly in a mixer , Add a mixed solution of 0.81% high-efficiency water reducer and 9.0% water into the mixer to change the solid raw material from a dispersed state into a viscous slurry to obtain ultra-high performance concrete mortar.
[0042] Add 3.0% volume ratio steel fiber into the mixer for stirring, and pour the uniformly stirred steel fiber concrete slurry into the feeding tank 1 of the printer.
[0043] Repeat the preparation steps of ultra-high-performance concrete mortar, add 2.5% volume ratio steel fiber and 1% volume ratio basalt fiber hybrid fiber into the mixer for mixing, and pour the uniformly mixed hybrid fiber concrete slurry into the feed tank 2 of the printer.
[0044] First, use the slurry in the feeding tank 1 to print the steel...
Embodiment 2
[0048] Select 47.3% by weight of yellow sand, 21.5% of cement, 12.9% of slag powder, 8.6% of silica fume, 0.128% of retarder, 0.0194% of starch ether, 0.0194% of cellulose ether, and 0.086% of thixotropic lubricant and mix them evenly in a mixer , Add a mixed solution of 0.77% superplasticizer and 8.6% water into the mixer to change the solid raw material from a dispersed state to a viscous slurry to obtain ultra-high performance concrete mortar.
[0049] Add 3.0% volume ratio steel fiber into the mixer for stirring, and pour the uniformly stirred steel fiber concrete slurry into the feeding tank 1 of the printer.
[0050] Repeat the preparation steps of ultra-high-performance concrete mortar, add 2.5% volume ratio steel fiber and 1% volume ratio glass fiber hybrid fiber into the mixer for stirring, and pour the uniformly mixed hybrid fiber concrete slurry into the printer feeding tank 2.
[0051] First, use the slurry in the feeding tank 1 to print the steel fiber concrete la...
Embodiment 3
[0055] Select 43.0% by weight of yellow sand, 21.5% of cement, 17.2% of slag powder, 8.6% of silica fume, 0.128% of retarder, 0.0194% of starch ether, 0.0194% of cellulose ether, and 0.086% of thixotropic lubricant and mix them evenly in a mixer , Add a mixed solution of 0.77% superplasticizer and 8.6% water into the mixer to change the solid raw material from a dispersed state to a viscous slurry to obtain ultra-high performance concrete mortar.
[0056] Add 3.0% volume ratio steel fiber into the mixer for stirring, and pour the uniformly stirred steel fiber concrete slurry into the feeding tank 1 of the printer.
[0057] Repeat the preparation steps of ultra-high performance concrete mortar, add 2.5% volume ratio steel fiber and 1% volume ratio polyvinyl alcohol fiber into the mixer for mixing, and pour the mixed fiber concrete slurry that is evenly stirred into the printer feeding tank 2.
[0058] First, use the slurry in the feeding tank 1 to print the steel fiber concrete...
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