CN110746167A - Antirust environment-friendly cement-based material and preparation method and application thereof - Google Patents
Antirust environment-friendly cement-based material and preparation method and application thereof Download PDFInfo
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- CN110746167A CN110746167A CN201910870974.8A CN201910870974A CN110746167A CN 110746167 A CN110746167 A CN 110746167A CN 201910870974 A CN201910870974 A CN 201910870974A CN 110746167 A CN110746167 A CN 110746167A
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- based material
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- friendly cement
- antirust
- ptb
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Classifications
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- 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
- C04B28/08—Slag cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00525—Coating or impregnation materials for metallic surfaces
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Abstract
The invention discloses an antirust environment-friendly cement-based material and a preparation method thereof2CO3) Calcium hydroxide (Ca (OH)2) The paint consists of sand, slag, PTB emulsion and water, and the mass percentages of the components are as follows: na (Na)2CO31.2％～3.2％、Ca(OH)20.8 to 2.2 percent of sand, 31.6 to 68.2 percent of sand, 20.2 to 46.6 percent of slag, 3.1 to 5.7 percent of PTB emulsion and 6.5 to 10.7 percent of water, wherein the sum of the mass percent of the components is 100 percent. The antirust environment-friendly cement-based material has the advantages of good environmental protection and working performance, short setting time, high early strength, good waterproofness, excellent cohesiveness and durability and the like,has better market application prospect.
Description
Technical Field
The invention belongs to the field of antirust materials, and particularly relates to an antirust environment-friendly cement-based material and a preparation method thereof.
Background
In order to avoid the conflict generated by intersection of the traffic flow and the pedestrian flow plane, ensure the safe crossing of people, improve the speed of the vehicle and reduce traffic accidents. The pedestrian overpass is generally built in a section with large traffic flow and dense pedestrians, or on intersections, squares and railways. Most of guardrails on two sides of the pedestrian overpass are made of steel, paint is coated on the outside of the guardrail, and is subjected to rust prevention treatment, but due to the fact that the paint is poor in durability, the phenomenon of falling off is easily caused due to long-term soaking of water, a large area of rust is caused around a column base or a welding line of the overpass, if the treatment is not performed in time, the guardrail is broken due to serious rust, and the driving safety of pedestrians and vehicles under the overpass is seriously threatened. Therefore, it is important to develop a rust preventive material having excellent durability.
At present, the existing rust-proof treatment methods mainly comprise coating, surface treatment, electroplating, chemicals, cathode rust-proof treatment or other methods. The patent or publication of the antirust cement-based material is not reported, so the antirust environment-friendly cement-based material can fill the blank.
Disclosure of Invention
Aiming at the defects and problems in the background technology, the invention provides an antirust environment-friendly cement-based material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention firstly provides an antirust environment-friendly cement-based material and a preparation method thereof. The antirust environment-friendly cement-based material is prepared from sodium carbonate (Na)2CO3) Calcium hydroxide (Ca (OH)2) The paint consists of sand, slag, PTB emulsion and water, and the mass percentages of the components are as follows: na (Na)2CO31.2％～3.2％、Ca(OH)20.8 to 2.2 percent of sand, 31.6 to 68.2 percent of sand, 20.2 to 46.6 percent of slag, 3.1 to 5.7 percent of PTB emulsion and 6.5 to 10.7 percent of water, wherein the sum of the mass percent of the components is 100 percent.
Further, said Na2CO3For analyzing pure Na2CO3。
Further, said Ca (OH)2For analysis of pure Ca (OH)2。
Further, the slag is S95-grade granulated blast furnace slag powder.
Further, the PTB emulsion is an ethylene-vinyl chloride-vinyl ester product, in the form of a white emulsion. The physical property indexes are viscosity: 80-120 mPa.s, solid content: 52. + -. 1 wt%, specific gravity: 1.1, pH value: 7 to 9.
The invention also provides a preparation method of the antirust environment-friendly cement-based material, which comprises the following steps:
(1) metering: respectively metering the materials according to the proportion;
(2) mixing dry materials: pouring sodium carbonate, calcium hydroxide and slag into a stirrer, and stirring for 2-3 minutes, then pouring sand and stirring for 2-3 minutes to obtain a uniformly-stirred mixed dry material;
(3) preparing an antirust material: dissolving the PTB emulsion in water, and stirring for 2-3 minutes to form a PTB solution; and then pouring the PTB solution into the mixed dry material, and stirring for 2-3 minutes to obtain the antirust environment-friendly cement-based material.
Finally, the invention provides an application of the antirust environment-friendly cement-based material, which specifically comprises the following steps: firstly removing impurities and loose iron rust on the surface of steel, and then spraying or brushing an antirust environment-friendly cement-based material on the surface of the steel, wherein the thickness of the antirust environment-friendly cement-based material is 3-5 mm, so that an antirust effect is achieved.
The main mechanism of the invention is as follows:
(1) the workability is excellent. The PTB emulsion has a water reducing effect, so that the antirust environment-friendly cement-based material has better fluidity in the construction process, and can be constructed by adopting methods such as spraying or brushing.
(2) The PTB emulsion and an alkali (mixed alkali of calcium hydroxide and sodium carbonate, the action is that calcium hydroxide and sodium carbonate generate sodium hydroxide to excite the activity of slag, and the generated sodium carbonate has the action of filling internal pores) excite the cement to have excellent cohesiveness. When the PTB emulsion is doped into the antirust environment-friendly cement-based material, the PTB emulsion forms a polymer net-shaped space structure in the antirust environment-friendly cement-based material, so that the development of microcracks in the antirust environment-friendly cement-based material is inhibited, and the environment-friendly cement-based material has better flexibility and bonding strength and can be well bonded with a steel base surface.
(3) The antirust performance is good. The excitant used in the alkali-activated cement is calcium hydroxide and sodium carbonate, wherein the calcium hydroxide is consumed in the hydration reaction process, the generated hydration products are sodium hydroxide and calcium carbonate, and therefore, Ca (OH) does not exist in the products and the reactants2Whereas the hydration product of ordinary portland cement contains 20-30% of calcium hydroxide, Ca (OH)2Is an unstable product, which ensures the present inventionThe product has good performance, and the formed hydration product of the alkali slag cement has compact structure, stable chemical performance and good durability. The concrete has high compactness and water and air are difficult to permeate. And the antirust environment-friendly cement-based material doped with the PTB emulsion has better waterproofness, and the synergistic effect of the two materials ensures that the antirust effect is excellent.
Compared with the prior rust-proof treatment technology, the invention has the following advantages:
1) the prior rust-proof treatment measures mainly comprise coating, surface treatment, electroplating, chemicals, cathode rust-proof treatment or other methods, but all have the defects of poor stability and durability, easy peeling and the like. The antirust cement-based material has the advantages of high stability, good durability, good waterproofness and the like.
2) PTB emulsion has water-reducing effect, and has excellent water resistance, adhesion and extraordinary flexibility, and is an organic binder that develops strength upon loss of water; the alkali-activated cement (consisting of slag, calcium hydroxide and sodium carbonate) is an inorganic binder that requires water consumption to develop strength. The inorganic and organic binders are combined to make up for the deficiencies of the inorganic and organic binders, so that the cement-based material added with the PTB emulsion has good workability, toughness, strength and durability.
3) Because the cement-based material has higher bonding performance and the PTB emulsion can greatly improve the bonding performance of concrete, the antirust environment-friendly cement-based material has high bonding strength with a steel base surface and is not easy to fall off under various load effects.
Detailed Description
The invention provides an antirust environment-friendly cement-based material and a preparation method thereof. The antirust environment-friendly cement-based material is prepared from sodium carbonate (Na)2CO3) Calcium hydroxide (Ca (OH)2) The paint consists of sand, slag, PTB emulsion and water, and the mass percentages of the components are as follows: na (Na)2CO31.2％～3.2％、Ca(OH)20.8 to 2.2 percent of sand, 31.6 to 68.2 percent of sand, 20.2 to 46.6 percent of slag, 3.1 to 5.7 percent of PTB emulsion and 6.5 to 10.7 percent of water, wherein the sum of the mass percent of the components is 100 percent.
The invention relates to an antirust environment-friendly cement-based material, which is prepared by the following steps:
(1) metering: respectively metering the materials according to the proportion;
(2) mixing dry materials: pouring sodium carbonate, calcium hydroxide and slag into a stirrer, and stirring for 2-3 minutes, then pouring sand and stirring for 2-3 minutes to obtain a uniformly-stirred dry material;
(3) preparing an antirust material: dissolving the PTB emulsion in water, and stirring for 2-3 minutes to form a PTB solution; and then pouring the PTB solution into the mixed dry material, and stirring for 2-3 minutes to obtain the antirust environment-friendly cement-based material.
The using method comprises the following steps: firstly removing impurities and loose iron rust on the surface of steel, and then spraying or brushing an antirust environment-friendly cement-based material on the surface of the steel, wherein the thickness of the antirust environment-friendly cement-based material is 3-5 mm, so that an antirust effect is achieved.
With respect to the water resistance of the PTB mortar, the following tests were carried out, and the reference mortar and PTB mortar were mixed in the proportions shown in Table 1, and the results of the tests are shown in Table 2.
TABLE 1 compounding ratio
TABLE 2 Water absorption
As shown in Table 2, the mortar was soaked in water for 1 hour and absorbed 37.5g of water. The PTB cement had only 25.9g of water absorbed after being soaked in water for 1 year, and the test piece was not soaked yet. Therefore, the PTB emulsion can greatly improve the waterproof performance of the mortar. In addition, the tensile bonding strength of the standard mortar is 0.02MPa and the tensile bonding strength of the PTB mortar is 1.58MPa through experiment, and the PTB mortar is known to greatly improve the bonding performance of the mortar.
Example 1
The paint mainly comprises sodium carbonate, calcium hydroxide, sand, slag, PTB emulsion and water, and the mass percent of each component is as follows: na (Na)2CO32.2％、Ca(OH)21.5%, sand 58.0%, slag 25.3%, PTB emulsion4.3 percent of liquid and 8.7 percent of water, and the sum of the mass percentages of the components is 100 percent.
The preparation method of the antirust environment-friendly cement-based material comprises the following specific steps:
(1) metering: respectively metering the materials according to the proportion;
(2) mixing dry materials: pouring sodium carbonate, calcium hydroxide and slag into a stirrer, and stirring for 2-3 minutes, then pouring sand and stirring for 2-3 minutes to obtain a uniformly-stirred dry material;
(3) preparing an antirust material: dissolving the PTB emulsion in water, and stirring for 2-3 minutes to form a PTB solution; and then pouring the PTB solution into the mixed dry material, and stirring for 2-3 minutes to obtain the antirust environment-friendly cement-based material.
The using method comprises the following steps: firstly removing impurities and loose iron rust on the surface of steel, and then spraying an antirust environment-friendly cement-based material on the surface of the steel, wherein the thickness of the antirust environment-friendly cement-based material is 3-5 mm, so that an antirust effect is achieved.
The initial setting time, the 1d compressive strength, the 1d flexural strength and the 1d water absorption of the antirust environment-friendly cement-based material and the bonding strength of the steel substrate are measured, and the initial setting time is 35min, the 1d compressive strength is 20MPa, the 1d flexural strength is 4.2MPa, and the 1d water absorption is 10.9g and the bonding strength of the steel substrate is 2.4 MPa.
Example 2
The paint mainly comprises sodium carbonate, calcium hydroxide, sand, slag, PTB emulsion and water, and the mass percent of each component is as follows: na (Na)2CO31.2％、Ca(OH)20.8 percent of sand, 68.2 percent of sand, 20.2 percent of slag, 3.1 percent of PTB emulsion and 6.5 percent of water, wherein the sum of the mass percentages of the components is 100 percent.
The preparation method of the antirust environment-friendly cement-based material comprises the following specific steps:
(1) metering: respectively metering the materials according to the proportion;
(2) mixing dry materials: pouring sodium carbonate, calcium hydroxide and slag into a stirrer, and stirring for 2-3 minutes, then pouring sand and stirring for 2-3 minutes to obtain a uniformly-stirred dry material;
(3) preparing an antirust material: dissolving the PTB emulsion in water, and stirring for 2-3 minutes to form a PTB solution; and then pouring the PTB solution into the mixed dry material, and stirring for 2-3 minutes to obtain the antirust environment-friendly cement-based material.
The using method comprises the following steps: firstly removing impurities and loose iron rust on the surface of steel, and then coating an antirust environment-friendly cement-based material on the surface of the steel, wherein the thickness of the antirust environment-friendly cement-based material is 3-5 mm, so that an antirust effect is achieved.
The initial setting time, the 1d compressive strength, the 1d flexural strength and the 1d water absorption of the antirust environment-friendly cement-based material and the bonding strength of the steel substrate are measured, and the initial setting time is 46min, the 1d compressive strength is 16MPa, the 1d flexural strength is 3.8MPa, and the 1d water absorption is 14.6g and the bonding strength of the steel substrate is 1.9 MPa.
Example 3
The paint mainly comprises sodium carbonate, calcium hydroxide, sand, slag, PTB emulsion and water, and the mass percent of each component is as follows: na (Na)2CO33.2％、Ca(OH)22.2 percent of sand, 31.6 percent of slag, 46.6 percent of slag, 5.7 percent of PTB emulsion and 10.7 percent of water, wherein the sum of the mass percentages of the components is 100 percent.
The preparation method of the antirust environment-friendly cement-based material comprises the following specific steps:
(1) metering: respectively metering the materials according to the proportion;
(2) mixing dry materials: pouring sodium carbonate, calcium hydroxide and slag into a stirrer, and stirring for 2-3 minutes, then pouring sand and stirring for 2-3 minutes to obtain a uniformly-stirred dry material;
(3) preparing an antirust material: dissolving the PTB emulsion in water, and stirring for 2-3 minutes to form a PTB solution; and then pouring the PTB solution into the mixed dry material, and stirring for 2-3 minutes to obtain the antirust environment-friendly cement-based material.
The using method comprises the following steps: firstly removing impurities and loose iron rust on the surface of steel, and then spraying an antirust environment-friendly cement-based material on the surface of the steel, wherein the thickness of the antirust environment-friendly cement-based material is 3-5 mm, so that an antirust effect is achieved.
The initial setting time, the 1d compressive strength, the 1d flexural strength and the 1d water absorption of the antirust environment-friendly cement-based material and the bonding strength of the steel substrate are measured, and the initial setting time is 31min, the 1d compressive strength is 24MPa, the 1d flexural strength is 5.0MPa, and the 1d water absorption is 7.8g and the bonding strength of the steel substrate is 2.5 MPa.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can make equivalent changes and modifications within the technical scope of the present invention disclosed by the present invention.
Claims (7)
1. An antirust environment-friendly cement-based material is characterized in that: the antirust environment-friendly cement-based material is composed of sodium carbonate, calcium hydroxide, sand, slag, PTB emulsion and water, and comprises the following components in percentage by mass: na (Na)2CO31.2％～3.2％、Ca(OH)20.8 to 2.2 percent of sand, 31.6 to 68.2 percent of sand, 20.2 to 46.6 percent of slag, 3.1 to 5.7 percent of PTB emulsion and 6.5 to 10.7 percent of water, wherein the sum of the mass percentages of the components is 100 percent.
2. The rust-inhibiting environmentally-friendly cement-based material as claimed in claim 1, wherein: said Na2CO3For analyzing pure Na2CO3。
3. The rust-inhibiting environmentally-friendly cement-based material as claimed in claim 1, wherein: the Ca (OH)2For analysis of pure Ca (OH)2。
4. The rust-inhibiting environmentally-friendly cement-based material as claimed in claim 1, wherein: the slag is S95 level granulated blast furnace slag powder.
5. The rust-inhibiting environmentally-friendly cement-based material as claimed in claim 1, wherein: the PTB emulsion is an ethylene-vinyl chloride-vinyl ester terpolymer, and the physical property indexes of the PTB emulsion are as follows: 80-120 mPa.s, solid content: 52. + -. 1 wt%, specific gravity: 1.1, pH value: 7 to 9.
6. The method for producing an antirust, environmentally friendly cement-based material as claimed in any one of claims 1 to 5, wherein: the method comprises the following steps:
(1) metering: respectively metering the components according to the mass ratio of the components;
(2) mixing dry materials: pouring sodium carbonate, calcium hydroxide and slag into a stirrer, and stirring for 2-3 minutes, then pouring sand and stirring for 2-3 minutes to obtain a uniformly-stirred mixed dry material;
(3) preparing an antirust material: dissolving the PTB emulsion in water, and stirring for 2-3 minutes to form a PTB solution; and then pouring the PTB solution into the mixed dry material, and stirring for 2-3 minutes to obtain the antirust environment-friendly cement-based material.
7. Use of the rust inhibiting eco-friendly cement-based material as claimed in any one of claims 1 to 5, wherein: firstly removing impurities and loose iron rust on the surface of steel, and then spraying or brushing the antirust environment-friendly cement-based material on the surface of the steel, wherein the thickness is 3-5 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111423197A (en) * | 2020-04-15 | 2020-07-17 | 福州市宇心建材科技有限公司 | Single-component alkali-activated cement tunnel fireproof coating and application method thereof |
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| CN102782055A (en) * | 2010-02-26 | 2012-11-14 | 新日本制铁株式会社 | Corrosion-proofing coating composition and process for production thereof, and method for prevention of corrosion in steel material |
| KR101555902B1 (en) * | 2015-05-04 | 2015-10-13 | 주식회사 로하스기술 | Coating construction method of surface of structure using polyurea hi-coat paint composition |
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| CN1237549A (en) * | 1999-06-25 | 1999-12-08 | 孟云芳 | Composite cement |
| CN102782055A (en) * | 2010-02-26 | 2012-11-14 | 新日本制铁株式会社 | Corrosion-proofing coating composition and process for production thereof, and method for prevention of corrosion in steel material |
| KR101555902B1 (en) * | 2015-05-04 | 2015-10-13 | 주식회사 로하스기술 | Coating construction method of surface of structure using polyurea hi-coat paint composition |
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