CN116283154A - High-viscosity cement paste and preparation method thereof - Google Patents
High-viscosity cement paste and preparation method thereof Download PDFInfo
- Publication number
- CN116283154A CN116283154A CN202310338189.4A CN202310338189A CN116283154A CN 116283154 A CN116283154 A CN 116283154A CN 202310338189 A CN202310338189 A CN 202310338189A CN 116283154 A CN116283154 A CN 116283154A
- Authority
- CN
- China
- Prior art keywords
- cement
- viscosity
- cement paste
- water
- stirring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims abstract description 108
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010146 3D printing Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to high-viscosity cement paste viscosity and a preparation method thereof, wherein the preparation method comprises the following steps: s1, stirring and mixing a part of cement components with water, standing, and stirring and mixing again to obtain a cement mixture; s2, introducing CO into the cement mixture obtained in the step S1 2 Then adding the rest of the cement components, and stirring and mixing to obtain the cement paste. Compared with the prior art, the preparation method is simple, effectively improves the viscosity of the cement paste, and is expected to be widely applied to the fields of spraying, 3D printing construction and the like with special requirements on the viscosity of the cement paste.
Description
Technical Field
The invention relates to the technical field of cement-based materials, in particular to a high-viscosity cement paste and a preparation method thereof.
Background
Cement-based materials are one of the most widely used artificial materials in the world today, and particularly in the engineering field there is a tremendous amount of use. With the development of the times, more and more projects with high difficulty become reality, and new technologies are also applied in the field of engineering, so that higher requirements are put on engineering materials. The viscosity of cement materials is particularly required in the fields of spraying, 3D printing construction and the like, and the viscosity of traditional cement paste materials is difficult to meet the construction requirement. Therefore, a method for improving the viscosity of the traditional cement paste and the cement paste prepared by the method are needed to be applied to production and life.
Disclosure of Invention
The invention aims to overcome the defects of low viscosity and the like of cement paste in the prior art and provides high-viscosity cement paste and a preparation method thereof.
The aim of the invention can be achieved by the following technical scheme:
the technical scheme of the invention is to provide a preparation method of high-viscosity cement paste, which comprises the following steps:
s1, stirring and mixing a part of cement components with water, standing, and stirring and mixing again to obtain a cement mixture;
s2, introducing CO into the cement mixture obtained in the step S1 2 Then adding the rest of the cement components, and stirring and mixing to obtain the cement paste.
Further, the mass ratio of water to cement component is 0.2-0.8:1.
Further, in the step S1, 1/3 to 2/3 of the cement component is mixed with water by stirring.
Further, in the step S1, the standing time is 18-22min.
Further, in the step S2, CO is introduced 2 The purity of (2) was 99.99%.
Further, in the step S2, CO is introduced 2 The ratio of the amount of (C) to the total mixture of cement components and water is 1L:8-12g.
Further, in the step S2, CO is introduced 2 The maximum flow rate at this time was 2.5L/min.
Further, in the step S2, aggregate and an additive can be added, wherein the aggregate is selected from any one or more of sand, stones or fibers.
Further, the mass ratio of aggregate, admixture to the total mixture of cement components and water is 0-x 0-y 1, x, y are any natural number greater than 0.
The aggregate and the additive are conventional design components and the dosages in the field, are not used as components affecting the innovation point of the invention, and when the mass ratio of the aggregate to the total mixture of the cement component and the water is 0:1, the aggregate is not added into the total mixture of the cement component and the water; when the mass ratio of the admixture to the total mixture of the cement component and water was 0:1, it was revealed that the admixture was not added to the total mixture of the cement component and water.
The second technical scheme of the invention is to provide a high-viscosity cement paste, which is based on the preparation method according to one of the technical scheme.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention adjusts the proportion of cement material and water and introduces CO 2 The reaction method effectively improves the viscosity of the cement paste. The main components of the cement are limestone, clay, iron ore powder and CO 2 Can react with CaO in cement paste, hydrated calcium silicate gel generated by hydration reaction of cement and calcium hydroxide to generate CaCO 3 . The cement ratio is increased, the proportion of free water in the cement paste is increased, the fluidity of the cement paste is enhanced, and the viscosity is reduced. The cement ratio is reduced, the proportion of free water in the cement paste is reduced, the fluidity of the cement paste is weakened, and the viscosity is increased.
(2) The preparation method is simple and effective, and is expected to be widely applied to the fields of spraying, 3D printing construction and the like with special requirements on the viscosity of cement paste.
Detailed Description
The present invention will be described in detail with reference to specific examples.
In the following examples and comparative examples, unless otherwise specified, the starting materials or processing techniques are all those which are conventional commercially available in the art.
Example 1:
a cement slurry with a water cement ratio of 0.4:1 was prepared using 400g of P.O.32.5 cement and 160g of water.
(1) First, 200g of cement and 160g of water were mixed and stirred sufficiently to dissolve the cement completely.
(2) The cement mixture was allowed to stand for 20min.
(3) Stirring the cement mixture after standing again, and introducing CO with the purity of 99.99% after stirring for 30s 2 Completely react and introduce CO 2 The gas time was 20min and the flow rate was 2.5L/min.
(4) And (3) adding the rest 200g of cement into the mixture obtained in the step (3), and fully stirring to obtain the cement paste.
Example 2:
a cement slurry with a water cement ratio of 0.6:1 was prepared using 350g of P.O.32.5 cement and 210g of water.
(1) First, 175g of cement and 210g of water were mixed and stirred sufficiently to dissolve the cement powder completely.
(2) The cement mixture was allowed to stand for 20min.
(3) Stirring the cement mixture after standing again, and introducing CO with the purity of 99.99% after stirring for 30s 2 Completely react and introduce CO 2 The gas time was 20min and the flow rate was 2.5L/min.
(4) And (3) adding the rest 175g of cement into the mixture obtained in the step (3), and fully stirring to obtain the required cement paste.
Comparative example 1:
compared with example 1, the method is largely the same except that CO is omitted 2 。
The method comprises the following specific steps:
a cement slurry with a water cement ratio of 0.4:1 was prepared using 400g of P.O.32.5 cement and 160g of water.
(1) Firstly, 200g of cement and 160g of water are mixed and fully stirred to completely dissolve cement powder.
(2) The cement mixture was allowed to stand for 20min.
(3) Stirring the cement mixture after standing again, and standing for 20min after stirring for 30 s.
(4) And (3) adding the rest 200g of cement into the mixture obtained in the step (3), and fully stirring to obtain the required cement paste.
Comparative example 2:
compared with example 2, the method is largely the same except that CO is omitted 2 。
The method comprises the following specific steps:
a cement slurry with a water cement ratio of 0.6:1 was prepared using 350g of P.O.32.5 cement and 210g of water.
(1) First, 175g of cement and 210g of water were mixed and stirred sufficiently to dissolve the cement powder completely.
(2) The cement mixture was allowed to stand for 20min.
(3) Stirring the cement mixture after standing again, and standing for 20min after stirring for 30 s.
(4) And (3) adding the rest 175g of cement into the mixture obtained in the step (3), and fully stirring to obtain the required cement paste.
The cement slurries obtained in example 1, example 2, comparative example 1 and comparative example 2 were subjected to viscosity test. The testing instrument is an MCR rheometer of An Dongpa company, and the testing shear rate is 1000s -1 10g of cement slurry sample. The test was performed within 43 to 45 minutes after the start of mixing the cement with water.
The test results are shown in Table 1. Example 1 and comparative example 1 having a water to ash ratio of 0.4, CO was introduced 2 Example 1 compared with CO 2 The viscosity of the cement paste of comparative example 1 was 99.76%. Example 2 and comparative example 2 having a water to ash ratio of 0.6 were fed with CO 2 Example 2 compared with CO-free 2 The viscosity of the cement paste of comparative example 2 was 299.83%. Therefore, the method can effectively improve the viscosity of the cement paste.
Table 1 cement paste viscosity test results
| Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | |
| Viscosity (mPa. S) | 399.67 | 168.93 | 200.05 | 42.25 |
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The preparation method of the high-viscosity cement paste is characterized by comprising the following steps of:
s1, stirring and mixing a part of cement components with water, standing, and stirring and mixing again to obtain a cement mixture;
s2, introducing CO into the cement mixture obtained in the step S1 2 Then adding the rest of the cement components, and stirring and mixing to obtain the cement paste.
2. The method for preparing a high-viscosity cement paste according to claim 1, wherein the mass ratio of water to cement components is 0.2-0.8:1.
3. The method for preparing a high viscosity cement paste according to claim 1, wherein 1/3 to 2/3 of the cement component is mixed with water in the step S1.
4. The method for preparing a high-viscosity cement paste according to claim 1, wherein in the step S1, the standing time is 18-22min.
5. The method for preparing a high-viscosity cement paste according to claim 1, wherein in the step S2, CO is introduced 2 The purity of (2) was 99.99%.
6. The method for preparing a high-viscosity cement paste according to claim 1, wherein in the step S2, CO is introduced 2 The ratio of the amount of (C) to the total mixture of cement components and water is 1L:8-12g.
7. The method for preparing a high-viscosity cement paste according to claim 1, wherein in the step S2, CO is introduced 2 The maximum flow rate at this time was 2.5L/min.
8. The method for preparing a high-viscosity cement paste according to claim 1, wherein in the step S2, aggregate and an additive can be added, wherein the aggregate is selected from any one or more of sand, stones or fibers.
9. The method for preparing a high-viscosity cement paste according to claim 8, wherein the mass ratio of the aggregate, the admixture to the total mixture of the cement component and water is 0-x:0-y:1, and x and y are any natural number greater than 0.
10. A high viscosity cement slurry, characterized in that it is based on the preparation method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310338189.4A CN116283154A (en) | 2023-03-31 | 2023-03-31 | High-viscosity cement paste and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310338189.4A CN116283154A (en) | 2023-03-31 | 2023-03-31 | High-viscosity cement paste and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116283154A true CN116283154A (en) | 2023-06-23 |
Family
ID=86779791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310338189.4A Pending CN116283154A (en) | 2023-03-31 | 2023-03-31 | High-viscosity cement paste and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116283154A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109368642A (en) * | 2018-11-27 | 2019-02-22 | 中国矿业大学 | A method of promoting fresh concrete absorbing carbon dioxide efficiency |
| CN113816767A (en) * | 2021-09-24 | 2021-12-21 | 湖南大学 | Preparation method of carbon dioxide premixed cement-based composite material |
| CN114538867A (en) * | 2022-03-21 | 2022-05-27 | 湖南大学 | Method for preparing cement-based material by using carbonized steel slag slurry |
-
2023
- 2023-03-31 CN CN202310338189.4A patent/CN116283154A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109368642A (en) * | 2018-11-27 | 2019-02-22 | 中国矿业大学 | A method of promoting fresh concrete absorbing carbon dioxide efficiency |
| CN113816767A (en) * | 2021-09-24 | 2021-12-21 | 湖南大学 | Preparation method of carbon dioxide premixed cement-based composite material |
| CN114538867A (en) * | 2022-03-21 | 2022-05-27 | 湖南大学 | Method for preparing cement-based material by using carbonized steel slag slurry |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111807804B (en) | Sand-free paste-based self-leveling mortar and preparation method thereof | |
| CN108793905B (en) | Repair mortar, preparation method thereof and application thereof in precast concrete member repair | |
| CN108585592A (en) | A kind of Concrete synergist and preparation method thereof | |
| CN110372308B (en) | Titanium gypsum waste residue composite cementing material and application thereof | |
| CN104876468A (en) | Functionalized polycarboxylic acid water reducer matched with silica fume and preparation method thereof | |
| CN111116154B (en) | Early-strength cement-based grouting material prepared from pre-hydrated fly ash and preparation method thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| CN112456915A (en) | Low-shrinkage and high-performance concrete prepared from full-machine-made sand and preparation process thereof | |
| CN110563376B (en) | Concrete reinforcing agent suitable for being prepared from machine-made sand and preparation method of mother liquor of concrete reinforcing agent | |
| CN114735961A (en) | Solid-liquid dual-purpose alkali-free accelerator and preparation method and application thereof | |
| CN112225486B (en) | Stable alkali-free liquid accelerator and preparation method and application thereof | |
| JP5422234B2 (en) | Cement composition | |
| CN115536300B (en) | Functional admixture for sprayed concrete and preparation method and application thereof | |
| CN116283154A (en) | High-viscosity cement paste and preparation method thereof | |
| CN111647115A (en) | Polycarboxylate superplasticizer mother liquor and preparation method thereof, and polycarboxylate superplasticizer and preparation method thereof | |
| CN107759126B (en) | Water reducing agent for sprayed concrete and preparation method thereof | |
| CN1477072A (en) | Production method of high-strength cement | |
| CN112608061B (en) | Accelerating agent composition for coal mine paste filling and preparation method and application thereof | |
| CN109665790B (en) | Cement-based self-leveling mortar and preparation method thereof | |
| CN116514450B (en) | Gypsum modifier for cement production | |
| CN115432952B (en) | Early-stage steel slag activity excitant and preparation method and application thereof | |
| CN117510163B (en) | Preparation method of quick-hardening magnesium slag-based repair mortar | |
| CN116462440B (en) | Low-shrinkage industrial solid waste excitant and preparation method and application thereof | |
| CN114315215B (en) | Liquid cement modifier and application thereof | |
| CN115368053B (en) | Reinforced gel reducing auxiliary agent and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |