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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

Inactive Publication Date: 2019-05-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic sand and gravel mining and production enterprises are small and medium-sized enterprises, which cannot form large-scale industrial mining
These enterprises lack centralized management and advanced production models, and adopt relatively backward production tools
The production quality of aggregates cannot be guaranteed, and even aggregates produced in different batches have large differences in particle size, gradation and surface shape

Method used

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  • Bionic concrete coarse aggregate based on photo-curing 3D (three-dimensional) printing, preparation method of aggregate and application of aggregate
  • Bionic concrete coarse aggregate based on photo-curing 3D (three-dimensional) printing, preparation method of aggregate and application of aggregate
  • Bionic concrete coarse aggregate based on photo-curing 3D (three-dimensional) printing, preparation method of aggregate and application of aggregate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] When 3D printing, set the number of printing layers of the base layer to 4 layers, the illumination time of the base layer is 35s, the illumination time of other layers is 8s, the luminous flux is 375lm, and the bionic concrete coarse aggregate of 12.5mm is printed. Take the bionic concrete coarse aggregate after printing, clean it with analytical pure alcohol, remove the support, use a 405nm wavelength LED ultraviolet shadowless lamp with a power of 200W, and irradiate for 1h. Take limestone coarse 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 stirring, and press the aggregate into the center of different cubic test blocks. The curing temperature is 20±2°C, and the curing humidity is above 90%. After curing for 28 days, the average compressive strengths of the single aggregate mortar test blocks of 3D printed bionic coarse aggregat...

Embodiment 2

[0042] When 3D printing, set the printing layer of the base layer to 3 layers, the illumination time of the base layer is 30s, the illumination time of other layers is 9s, the luminous flux is 400lm, and the bionic concrete coarse aggregate of 4.75mm is printed. Take the bionic concrete coarse aggregate after printing, clean it with analytical pure alcohol, remove the support, use a 405nm wavelength LED ultraviolet shadowless lamp with a power of 200W, and irradiate for 1h. Take limestone coarse 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 stirring, and press the aggregate into the center of different cubic test blocks. The curing temperature is 20±2°C, and the curing humidity is above 90%. After 28 days of curing, the average compressive strength of the single aggregate mortar test blocks of 3D printed bionic coarse aggregate and limesto...

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Abstract

The invention discloses a bionic concrete coarse aggregate based on photo-curing 3D (three-dimensional) printing, a preparation method of the aggregate and an application of the aggregate. The bionicconcrete coarse aggregate takes photo-curable resin as a raw material, is prepared by a 3D printing method and comprises a main structure and bionic projection structures positioned on the surface ofthe main structure. Compared with the prior art, the bionic concrete coarse aggregate based on the photo-curing 3D printing has the advantages that grain shapes are mellow and full, the workability and durability of concrete are theoretically enhanced, mechanical interlocking of the aggregate and cement paste is enhanced by the bionic projection structures distributed on the surface of the main structure, and the interface bonding power of high-molecular polymers and cement-based inorganic nonmetallic materials can be enhanced. The concrete coarse aggregate prepared by photo-curing 3D printingis accurate to form, stable in quality and high in printing speed and has the great potential of replacing natural crushed stone aggregate.

Description

technical field [0001] The invention relates to the field of design and preparation of concrete coarse aggregate, and provides a bionic concrete coarse aggregate based on light-curing 3D printing and its preparation method and application. Background technique [0002] With the development of society, the demand for concrete in the construction industry is increasing. The production and consumption of concrete in China rank among the top in the world, consuming a large amount of resources and energy every year. Aggregate is one of the raw materials for concrete production, accounting for more than half of the proportion of concrete materials. With the gradual increase in the annual demand for concrete, the demand for natural sand and stone resources as aggregates is also increasing. According to the data provided by the China Aggregate Association, the proportion of steel, cement and sand and gravel aggregate in China's concrete raw materials is 1:6:36. The construction o...

Claims

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Application Information

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IPC IPC(8): C04B16/04B29C64/10B33Y10/00B33Y70/00
Inventor 蒋金洋许光远郑琦武胜萍王凤娟陈宸吴思燕张傲宁
Owner SOUTHEAST UNIV
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