Preparation method of super cementitious cement for 3D printing and super cementitious cement for 3D printing

A 3D printing and super-gelling technology, applied in the field of building materials, can solve the problems of low economic benefit, low grinding efficiency, and complex dosage, and achieve the effects of increasing hydration rate, excellent buildability, and improving early strength

Active Publication Date: 2022-06-21
HUBEI UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the existing 3D printing cement-based materials, such as various components, complex doses, difficult control, inconvenient mass production, and low grinding efficiency, high energy consumption, and low economic benefits caused by dry grinding. To provide a supergel material for 3D printing that is easy to mass-produce, has high wet grinding efficiency, and enables 3D printing to have quick-setting and easy-to-print properties, high compressive strength, and excellent post-processing performance

Method used

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  • Preparation method of super cementitious cement for 3D printing and super cementitious cement for 3D printing

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preparation example Construction

[0019] The invention provides a preparation method of super cementitious cement for 3D printing, the method comprising:

[0020] Step 1: put 100-150 parts by weight of aluminate cement, 400-600 parts by weight of water, and 2-8 parts by weight of grinding aid into a ball mill, and wet-grind to obtain nano-slurry A;

[0021] Step 2: Pass 380-475 parts by weight of Portland cement clinker, 20-25 parts by weight of gypsum, 120-180 parts by weight of water, 10-30 parts by weight of ultrafine ceramic fibers, and 1-5 parts by weight of water reducing agent through the liquid Phase grinding to obtain slurry B;

[0022] Step 3: adding the nano-slurry A, 1-10 parts by weight of interface enhancer, and 15-40 parts by weight of basalt fiber into the slurry B, and mixing to obtain a super cementitious cement for 3D printing.

[0023] Wherein, the aluminate cement used in step 1 can be aluminate cement commonly used in the field. Generally speaking, aluminate cement is prepared by calcini...

Embodiment 1

[0037] Step 1: Take 100 parts of aluminate cement, 400 parts of water, and 2 parts of triethanolamine-based high-efficiency grinding aid, and perform liquid phase grinding at a rotational speed of 400 r / min for 60 minutes to obtain a slurry A with a median particle size of 300 nm;

[0038] Step 2: Put 380 parts of Portland cement clinker, 20 parts of gypsum, 120 parts of water, 10 parts of ultra-fine ceramic fibers, and 1 part of polycarboxylate superplasticizer into a planetary ball mill, at 400 r / min. Slurry B was obtained by wet grinding for 20 minutes under the rotating speed, and the median particle size was 5 μm;

[0039] Step 3: Add slurry A, 2 parts of interface enhancer, and 15 parts of basalt fiber to slurry B, and mix them evenly to obtain the super cementitious cement C1 for 3D printing in Example 1;

[0040] Step 4: Mix the super cementitious cement C1 with 80 parts of water and 750 parts of river sand evenly to obtain a mixture E1 for 3D printing, which is then p...

Embodiment 2

[0042] Step 1: Take 120 parts of aluminate cement, 450 parts of water, and 4 parts of triethanolamine-based high-efficiency grinding aid, and liquid-phase grinding Slurry A with a median particle size of 200 nm for 80 minutes at a rotational speed of 600 r / min;

[0043] Step 2: Put 428 parts of Portland cement clinker, 22 parts of gypsum, 140 parts of water, 15 parts of ultra-fine ceramic fibers, and 2 parts of polycarboxylate superplasticizer into a planetary ball mill, at 500 r / min. Wet-milling for 20 minutes at a rotating speed obtains slurry B with a median particle size of 4 μm;

[0044] Step 3: Add slurry A, 4 parts of interface enhancer, and 25 parts of basalt fiber to slurry B, and mix evenly to obtain super cementitious cement C2 for 3D printing;

[0045] Step 4: Mix the super cementitious cement C2 with 80 parts of water and 750 parts of river sand evenly to obtain the mixture E2 for 3D printing, and then print it with a printer.

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Abstract

The invention provides a preparation method of super cementitious cement for 3D printing and super cementitious cement for 3D printing prepared by the method. The preparation method of the super cementitious cement for 3D printing provided by the present invention comprises: step 1: take 100-150 parts by weight of aluminate cement, 400-600 parts by weight of water, and 2-8 parts by weight of grinding aid into a ball mill, Wet milling obtains nano slurry A; Step 2: 380-475 parts by weight of Portland cement clinker, 20-25 parts by weight of gypsum, 120-180 parts by weight of water, 10-30 parts by weight of ultrafine ceramic fibers, 1- 5 parts by weight of water reducer are ground into slurry B by liquid phase grinding; step 3: adding the nano slurry A, 1-10 parts by weight of interface enhancer, and 15-40 parts by weight of basalt fiber to the slurry B, And mix to get super cementitious cement for 3D printing. The super cementitious cement for 3D printing provided by the present invention is easy to mass-produce, has high wet grinding efficiency, and enables 3D printing to have quick setting and easy printing, high compressive strength and excellent post-processing performance.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a preparation method of super cementitious cement for 3D printing and the super cementitious cement for 3D printing prepared by the method. Background technique [0002] 3D printing technology is a new material preparation technology developed in the past 30 years and is considered to be an "important production tool for the third industrial revolution". In the same period, 3D printing of cement-based materials has also been significantly developed and promoted, and it has been successfully applied in construction fields such as housing construction, underground engineering, roads and bridges, and has shown great development potential. The biggest advantage of 3D printing technology and traditional material preparation technology is that it is fast, does not require templates and a large number of workers, can achieve overall molding, reduces a series of tedious steps, g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06B33Y70/10
CPCC04B28/06B33Y70/10C04B2111/00181C04B2201/50C04B22/00C04B22/143C04B2103/302C04B2103/52C04B14/4643C04B14/4618C04B2103/0057
Inventor 贺行洋唐袁珍杨进谭洪波于肖雷张强王铁白行张芸宁苏英李田周创
Owner HUBEI UNIV OF TECH
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