Bionic concrete coarse aggregate based on photo-curing 3D (three-dimensional) printing, preparation method of aggregate and application of aggregate
A 3D printing, coarse aggregate technology, applied in manufacturing, additive processing, etc., can solve the problems of lack of centralized management and advanced production mode, inability to form large-scale industrial mining, and inability to guarantee the quality of aggregate production. Fast printing speed, accurate molding, and increasing the effect of mechanical bite
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[0039] Example 1
[0040] In 3D printing, set the number of printing layers in the base layer to 4, the light time of the base layer is 35s, the light time of other layers is 8s, the light flux is 375lm, and the 12.5mm bionic concrete coarse aggregate is printed. Take the printed bionic concrete coarse aggregate, use analytical pure alcohol to clean and remove the support, use a 405nm wavelength LED UV shadowless lamp with a power of 200W and irradiate it for 1 hour. Take coarse limestone aggregate with the same particle size, wash and dry. Weigh water, cement and standard sand according to the mass ratio of 1:2:6, and form a 40mm*40mm*40mm cubic test block after fully mixing, and press the aggregate into the center of the different cubic test blocks. The curing temperature is 20±2℃, and the curing humidity is above 90%. After curing for 28 days, the average compressive strengths of single-aggregate mortar test blocks of 3D printed bionic coarse aggregate and limestone coarse a...
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[0041] Example 2
[0042] In 3D printing, set the number of printing layers of the base layer to 3, the light time of the base layer is 30s, the light time of other layers is 9s, the luminous flux is 400lm, and the 4.75mm bionic concrete coarse aggregate is printed. Take the printed bionic concrete coarse aggregate, use analytical pure alcohol to clean and remove the support, use a 405nm wavelength LED UV shadowless lamp with a power of 200W and irradiate it for 1 hour. Take coarse limestone aggregate with the same particle size, wash and dry. Weigh water, cement, and standard sand according to the mass ratio of 1:2:6, and form a 20mm*20mm*20mm cubic test block after fully mixing, and press the aggregate into the center of different cubic test blocks. The curing temperature is 20±2℃, and the curing humidity is above 90%. After 28 days of curing, the average compressive strengths of the single-aggregate mortar test blocks of 3D printed bionic coarse aggregate and limestone coars...
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