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

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...

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 material, so that the dense component or product can be obtained, which brings a lot of inconvenience to the production and increases the production cost. cost, resulting in excessive waste (waste of molds)

Therefore, traditional cement mortar is not suitable for 3D printing, and there is an urgent need to develop a cement mortar material suitable for 3D printing.