Cement dry-mixed mortar applicable to 3D printing and preparation method thereof

A dry-mixed mortar, 3D printing technology, applied in the direction of additive processing, can solve the problems of immature raw material technology, unsuitable for 3D printing, increase production cost, etc., to reduce construction waste, deformable combination, construction and ease. good effect

Pending Publication Date: 2019-05-03
北汇绿建集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3D printing construction can subvert the traditional construction industry, but the technology of 3D printing construction raw materials in the market is not yet mature
In the process of component or product production, the cement material is shaped by the mold, and the fluidity or vibration of the cement material can only fill the mold when adding the cement ma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1:

[0022] A cement dry-mix mortar suitable for 3D printing is characterized in that it comprises the following components: cement, dry sand, admixtures, fibers, admixtures, acrylic emulsions, water reducing agents, and water. Acrylic emulsion can increase the bonding performance of the mortar, increase the construction and workability of the material, make the material fast coagulate, improve the early strength performance, and realize the continuous printing of the material.

[0023] Preferably, the admixture is composed of heavy calcium and mineral powder. Heavy calcium can improve the bonding performance of mortar, reduce the amount of cement and sand and reduce costs; mineral powder can improve the strength and workability of mortar, reduce the amount of cement and sand, and reduce costs.

[0024] Preferably, it also includes ultrafine polyvinyl alcohol powder and cellulose ether. Ultra-fine polyethanol powder can increase the bonding performance of the materia...

Example Embodiment

[0038] Example 2:

[0039] The difference between Example 2 and Example 1 is only in the parts by weight of the various components of the cement dry-mix mortar, and the weight of the ingredients during production, the rest are the same, as follows:

[0040] A cement dry-mixed mortar suitable for 3D printing, which is made up of the following components by weight: 30 parts by weight of cement, 50 parts by dry sand, 5 parts by heavy calcium, 5 parts by mineral powder, 0.5 parts by fiber, ultra-fine polymer 0.02 parts of vinyl alcohol powder, 0.03 parts of cellulose ether, 0.015 parts of acrylic emulsion, 0.01 parts of water reducing agent, and 14 parts of water.

Example Embodiment

[0041] Example 3:

[0042] The difference between Example 3 and Example 1 is only that the parts by weight of each component of the dry cement mortar are different, and the rest are the same, as follows:

[0043] A cement dry-mix mortar suitable for 3D printing, which is made up of the following components by weight: 32 parts by weight of cement, 52 parts of dry sand, 8 parts of heavy calcium, 8 parts of mineral powder, 0.5 parts of fiber, and ultrafine polymer 0.04 parts of vinyl alcohol powder, 0.04 parts of cellulose ether, 0.025 parts of acrylic emulsion, 0.01 parts of water reducing agent, 15 parts of water.

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Abstract

The invention relates to the field of raw materials for 3D-printed buildings, specifically to a cement dry-mixed mortar applicable to 3D printing and a preparation method thereof. The cement dry-mixedmortar comprises the following components: cement, dry sand, an admixture, fiber, an additive, an acrylic emulsion, a water reducing agent and water. The cement dry-mixed mortar has deformability andgood bonding property, can deform and is insusceptible to cracking under external force, and still maintains an unchanged original shape when the external force is removed; when the cement dry-mixedmortar is utilized for 3D printing, a 3D-printed building can be rapidly molded and does not collapse under the state of no mold; the rheological characteristic of a traditional cement material is changed, and the cement dry-mixed mortar has dough-like plasticity; the cement dry-mixed mortar can be rapidly molded and does not collapse in the process of use, thereby achieving the purposes of capability of preparing a special-shaped member and continuous construction without arrangement of a mold; in addition, through formula components and the preparation method provided by the invention, the cement dry-mixed mortar can reach a strength of 35 MPa and an impermeability grade of P8.

Description

technical field [0001] The invention relates to the field of 3D printing building materials, in particular to a cement dry-mix mortar suitable for 3D printing and a preparation method thereof. Background technique [0002] At present, 3D printing technology is becoming more and more perfect, and more and more items can be completed by 3D printing. 3D printing construction can subvert the traditional construction industry, but the technology of 3D printing construction raw materials in the market is not yet mature. The rheological characteristics of traditional cement materials make the state of cement materials impossible to change, and the slump characteristics of cement itself make it impossible to maintain the shape without external force. Therefore, traditional cement materials must be maintained by external forces (molds) , and the external force cannot be removed until the final setting is over. In the process of component or product production, the cement material i...

Claims

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Application Information

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IPC IPC(8): C04B28/04B33Y70/00
Inventor 张连开谷春霞严作勇钱庆杰王法庆王志军
Owner 北汇绿建集团有限公司
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