CN113387641A - Stable composite geopolymer cementing material and preparation method thereof - Google Patents
Stable composite geopolymer cementing material and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920000876 geopolymer Polymers 0.000 title abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004568 cement Substances 0.000 claims abstract description 20
- 239000011398 Portland cement Substances 0.000 claims abstract description 11
- 238000011049 filling Methods 0.000 claims abstract description 10
- 238000012423 maintenance Methods 0.000 claims abstract 2
- 229920003041 geopolymer cement Polymers 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 239000011413 geopolymer cement Substances 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000004512 die casting Methods 0.000 claims description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000011414 polymer cement Substances 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000011083 cement mortar Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011433 polymer cement mortar Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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 discloses a stable composite geopolymer gelled material and a preparation method thereof, wherein the composite gelled material comprises the following components: 90-100 parts of composite cement component; 30-45 parts of a curing component; 9-10 parts of water component and 12-18.5 parts of modified material; the modified material comprises the following components: 10-15 parts of filling component, 1-2 parts of toughening component and 1-1.5 parts of water reducing component. Compared with the traditional ordinary Portland cement, the stable composite cementing material and the cementing material prepared by the preparation technology have the advantages that the compression strength and the breaking strength of cement mortar are respectively improved by 114% and 10% when the cement mortar is maintained for 12 hours in a standard way; after standard maintenance for 28 days, the compressive and flexural strengths of the cement mortar are respectively improved by 10.5 percent and 37.5 percent. The preparation technology of the stable composite geopolymer cementing material is simple and efficient, can meet the application requirements of various projects, and has important practical significance for building resource-saving society and environment-friendly society in China.
Description
Technical Field
The invention relates to the field of geopolymer gelled materials in constructional engineering, in particular to a stable composite geopolymer gelled material and a preparation technology thereof.
Background
Cement is the cementing material with the widest application range in the world at present. However, with the progress of society, the development of economy and the enhancement of environmental awareness, the traditional cementing materials such as general cement cannot meet the social demands more and more. The geopolymer is a novel high-performance inorganic polymer cementing material formed by alkali excitation of silicon-aluminum raw materials such as metakaolin, fly ash and slag. Compared with the common cement-based cementing material, the high-strength cement-based cementing material has the characteristics of higher strength, better durability, greenness, low carbon and the like. And the raw materials are rich and cheap, and geopolymers have attracted more and more attention in the engineering field.
However, geopolymers also have some of the following disadvantages: (1) geopolymers are more brittle; (2) the coagulation speed of geopolymer is difficult to control; (3) compared with complex geopolymer manufacturing, the alkaline activator control has larger influence on the later performance of the geopolymer. In recent years, with the increasing prominence of such problems, a great deal of research is being conducted by scholars at home and abroad on overcoming the technical bottlenecks such as the disadvantages. For example, patent CN102180606B relates to a geopolymer-like cement and a preparation method thereof, wherein the geopolymer-like cement provided by the patent is composed of stone coal vanadium extraction tailings, solid alkali metal hydroxide, solid sodium aluminate, superfine active silica fume and metakaolin, but the compressive strength of the geopolymer-like cement prepared by the method is not superior to that of the traditional portland cement, and the preparation process requires high-temperature calcination and heat preservation, and is relatively complex. In addition, patent CN103282325A discloses a geopolymer cement based on calcium poly (iron-aluminosilicate) and a production method thereof, wherein the 7d compressive strength of the geopolymer cement prepared by the method is 40Mpa, and the 28d compressive strength is as high as 90 Mpa. Although the compression strength is high, the preparation process needs to be carried out at the temperature of 600-850 ℃, and the self-shrinkage of cement is large at the later stage. And patent CN108726926A relates to a method for producing geopolymer cement mortar from red mud and bauxite tailings, and the geopolymer cement mortar provided by the patent is prepared from Bayer process red mud, sintering process red mud, bauxite tailings, steel slag powder, sand, caustic alkali and silicon powder. Although the geopolymer cement mortar prepared by such a method is low in cost. Green and environment-friendly, but the 28d compressive strength of cement mortar is only 35 MPa.
In conclusion, the geopolymer cement prepared by the conventional method still has the problems of large self-shrinkage, insufficient later strength, complicated production process and the like, and the service quality and the popularization and application range of the novel geopolymer cement are greatly reduced. Therefore, we propose a stable composite geopolymer gelled material and a preparation technology.
Disclosure of Invention
The present invention aims to provide a stable composite geopolymer gelled material and a preparation technology thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a stable composite geopolymer cementing material and a preparation technology thereof are disclosed, wherein the stable composite geopolymer cementing material is composed of the following components: 90-100 parts of composite cement component, 30-45 parts of curing component, 9-10 parts of water component and 12-18.5 parts of modified material; the modified material comprises the following components: 10-15 parts of filling component, 1-2 parts of toughening component and 1-1.5 parts of water reducing component.
The composite cement component is the main component of the stable composite geopolymer cementing material, and the strength is mainly formed by the hydration and alkali activation reaction of the composite cement component.
The curing component is the main component of alkali activation reaction, and the curing component and metakaolin have alkali activation reaction to form strength.
The water component is one of the main ingredients involved in the muddy water action with the silicate water and optimizes workability of the mixture.
The filling component is a main component for improving the later strength of the stable composite geopolymer cementing material and reducing the shrinkage of the mixture, can be uniformly dispersed into the inner gaps of the mixture, improves the compactness of the mixture, provides auxiliary strength in the later period and prevents the problem of later strength shrinkage of the mixture.
The toughening component is a main component for preventing the segregation of the geopolymer concrete mixture and improving the later-period breaking strength of the concrete, and has an auxiliary effect on the later-period compactness of the concrete.
The water reducing component improves the construction workability of the stable composite geopolymer cementing material, reduces the water-cement ratio and further improves the strength of the mixture.
Preferably, the composite cement comprises 40-50 parts of ordinary portland cement and 50-60 parts of metakaolin subjected to alkali treatment.
Preferably, the curing component is water glass with a modulus of 1.4, which is prepared by sodium hydroxide.
Preferably, the water component is clear, transparent, clean, human-drinkable water.
Preferably, the filling component is any one or more of basalt fiber, fly ash or hollow glass beads.
Preferably, the toughening component is any one or more of polypropylene fiber, polyester fiber or lignocellulose.
Preferably, the water reducing component is one or two of a polycarboxylic acid type solid water reducing agent and a melamine type solid water reducing agent.
The stable composite geopolymer cement mortar test piece prepared from the materials has good stability, lower self-shrinkage and higher compressive and flexural strength.
In order to achieve the effect of the regenerated aggregate enhancer, the technical scheme adopted by the invention is as follows:
weighing the components according to the weight, firstly mixing the ordinary portland cement component and the water reducing agent component, and uniformly mixing to obtain a mixture a; then, mixing the metakaolin component, the filling component and the toughening component, and uniformly stirring to obtain a mixture b; and then adding the weighed water and the mixture a into a stirring pot, slowly stirring for 30-60 s, quickly stirring for 3-5 min, adding the mixture b into the stirring pot, stirring for 8-10 min, and preparing the stable compound polymer cement test piece through die casting and curing.
The invention has the beneficial effects that:
1. compared with the common cement-based cementing material, the stable composite geopolymer cementing material has higher early-stage flexural and compressive strength and later-stage flexural and compressive strength;
2. compared with the traditional geopolymer concrete, the stable composite geopolymer concrete has smaller self-shrinkage and higher stability;
3. the stable composite geopolymer cementing material has the advantages of simple preparation process, low cost, environmental friendliness and strong adaptability in actual processing and utilization.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
The test refers to the national standard JTG E30-2005 Highway engineering cement and cement concrete test regulation T0506-.
Firstly, respectively weighing composite cement components, wherein 50 parts by mass of ordinary portland cement and 50 parts by mass of metakaolin subjected to alkali treatment; curing components: 40 parts by mass of 1.4-modulus water glass prepared by sodium hydroxide; water component: 10 parts by mass of clear and clean water; the filling components comprise 5 parts by mass of basalt fibers and 11 parts by mass of hollow glass microspheres; a toughening component: 2 parts by mass of lignocellulose; water reducing component: 1.5 parts by mass of a polycarboxylic acid type solid water reducing agent; ISO standard sand: 300 parts by mass.
Then, mixing the ordinary portland cement component with the water reducing agent component, and uniformly stirring to obtain a mixture (a 1); then, the metakaolin component, the filling component and the toughening component are mixed and uniformly stirred to obtain a mixture (b 1).
Then adding the weighed water and the mixture a1 into a stirring pot, slowly stirring for 60s, quickly stirring for 5min, then adding the mixture b1 into the stirring pot, stirring for 10min, stopping stirring for 90s, adding ISO sand, stirring for 60s at a high speed, and preparing the stable composite polymer cement mortar test piece through molding and curing. The test results are shown in table 1.
TABLE 1 Cement mortar compression/rupture strength comparison table
As can be seen from the above table, the compressive breaking strength of the cement mortar prepared from the stable composite geopolymer cementing material reaches 10.7MPa and 2.2MPa respectively after 12 hours of standard curing, which are respectively increased by 114% and 10% compared with the compressive breaking strength of the cement mortar prepared from ordinary portland cement, and after 28 days of standard curing, the compressive breaking strength of the cement mortar prepared from the stable composite geopolymer cementing material reaches 62MPa and 8.8MPa, which are respectively increased by 10.5% and 37.5% compared with the compressive breaking strength of the cement mortar prepared from ordinary portland cement. From the test results, the stable composite geopolymer cementing material and the preparation technology prepared by the invention have excellent mechanical properties, simple preparation process and wide market prospect.
The above description is only for illustrating the technical idea of the present invention, and the present application is not limited thereto. All equivalent modifications, substitutions and improvements that come within the spirit and scope of the application are desired to be protected by the following claims.
Claims (9)
1. A stable composite geopolymer cement, characterized in that: comprises 90-100 parts of composite cement component; 30-45 parts of a curing component; 9-10 parts of water component and 12-18.5 parts of modified material; the modified material comprises the following components: 10-15 parts of filling component, 1-2 parts of toughening component and 1-1.5 parts of water reducing component.
2. A stable, composite geopolymer cement according to claim 1, characterized in that: the composite cement comprises 40-50 parts of ordinary portland cement and 50-60 parts of metakaolin subjected to alkali treatment.
3. A stable, composite geopolymer cement according to claim 1, characterized in that: the curing component is water glass with a modulus of 1.4 which is prepared by sodium hydroxide.
4. A stable, composite geopolymer cement according to claim 1, characterized in that: the water component is clear, transparent and clean water which can be drunk by people.
5. A stable, composite geopolymer cement according to claim 1, characterized in that: the filling component is any one or more of basalt fiber, fly ash or hollow glass beads.
6. A stable, composite geopolymer cement according to claim 1, characterized in that: the toughening component is any one or more of polypropylene fiber, polyester fiber or lignocellulose.
7. A stable, composite geopolymer cement according to claim 1, characterized in that: the water reducing component is one or two of a polycarboxylic acid type solid water reducing agent and a melamine type solid water reducing agent.
8. Process for the preparation of a stable complex geopolymer cement according to any of claims 1 to 7, characterized in that it comprises the following steps: weighing the components according to the weight, firstly mixing the ordinary portland cement component and the water reducing agent component, and uniformly mixing to obtain a mixture a; then, mixing the metakaolin component, the filling component and the toughening component, and uniformly stirring to obtain a mixture b; and then adding the weighed water and the mixture a into a stirring pot, slowly stirring for 30-60 s, quickly stirring for 3-5 min, adding the mixture b into the stirring pot, stirring for 8-10 min, and preparing the stable compound polymer cement test piece through die casting and curing.
9. The method for preparing a stable composite geopolymer cement according to claim 8, characterized in that: the cementing material is in accordance with the maintenance standard of the traditional ordinary portland cement.
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| CN202110619648.7A CN113387641A (en) | 2021-06-03 | 2021-06-03 | Stable composite geopolymer cementing material and preparation method thereof |
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| CN202110619648.7A Pending CN113387641A (en) | 2021-06-03 | 2021-06-03 | Stable composite geopolymer cementing material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013114824A1 (en) * | 2012-12-27 | 2014-07-03 | Povazská cementáren, a.s. | Preparing a complex mixture and cement composition, comprises combining a mineral component with an aqueous solution of a surface active surfactant component (wetting agent) to form the complex mixture with a Portland cement component |
| CN107324738A (en) * | 2017-08-29 | 2017-11-07 | 李建州 | A kind of Cement Concrete Pavement Reconstruction material and Cement Concrete Pavement Reconstruction method |
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2021
- 2021-06-03 CN CN202110619648.7A patent/CN113387641A/en active Pending
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Application publication date: 20210914 |