A method for preparing a 3D printing concrete incorporating plant fibers
By treating plant fibers with water glass and blending them with sulfoaluminate cement and alkali-activated cementitious materials, the contradiction between pumpability and constructability of 3D printed concrete was resolved, improving fluidity and early strength while reducing the risk of shrinkage and cracking.
CN122586458APending Publication Date: 2026-08-18HUAIYIN INSTITUTE OF TECHNOLOGY
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Patent Information
- Application Number
- CN202610793965.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-03
- Publication Date
- 2026-08-18
AI Technical Summary
Technical Problem
Existing 3D printed concrete presents a contradiction between pumpability and constructability, leading to a tendency to crack.
Method used
Plant fibers treated with water glass are blended with sulfoaluminate cement, and alkali-activated cementitious materials are used in combination with ultrafine sand and a shaping agent to form nanocrystals to enhance adhesion and reduce shrinkage.
Benefits of technology
It improves the fluidity and early strength of concrete, reduces shrinkage, enhances interlayer bonding, and reduces the risk of cracking.
✦ Generated by Eureka AI based on patent content.
Abstract
The present application relates to the technical field of 3D printing concrete, and discloses a preparation method of 3D printing concrete mixed with plant fibers, which comprises the following steps: step 1, soaking and drying the plant fibers treated with water glass in saturated limewater; step 2, blending the plant fibers with sulphoaluminate cement; step 3, preparing alkali-activated 3D printing concrete and pumping it by taking 30-50 parts of water glass, 20-40 parts of sodium hydroxide, 100-200 parts of limestone powder, 1000-1200 parts of sand, 100-200 parts of extra-fine sand, 400-500 parts of mineral powder, 50-150 parts of rice husk ash, 20-40 parts of hydroxypropyl methyl cellulose, 220-300 parts of water and 5-10 parts of water reducing agent according to mass fraction; step 4, forcibly stirring the concrete and adding the product obtained in step 2; and step 5, printing the concrete and spraying a setting agent between the concrete layers. The present application helps to improve the constructability of 3D printing concrete and reduce its shrinkage.
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