CN108178585B - Cement for road and bridge - Google Patents
Cement for road and bridge Download PDFInfo
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- CN108178585B CN108178585B CN201810182352.1A CN201810182352A CN108178585B CN 108178585 B CN108178585 B CN 108178585B CN 201810182352 A CN201810182352 A CN 201810182352A CN 108178585 B CN108178585 B CN 108178585B
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- cellulose acetate
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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
- C04B28/04—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
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- 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)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of building materials, and particularly discloses cement for a road and bridge. The cement for the road and bridge comprises the following components in parts by weight: 100-150 parts of cement; 10-20 parts of palygorskite; 5-10 parts of nano aluminum hydroxide; 1-5 parts of calcium carbonate particles; 1-5 parts of zinc stearate; 0.1-1 part of titanium powder; 1-3 parts of polyacrylamide; 0.1-1 part of modified cellulose acetate. The cement for the road and bridge provided by the invention has excellent anti-dispersion performance, and can reduce the loss of cement when being used for underwater construction, so that the strength of cement concrete after construction is ensured. In addition, the cement for the road and bridge has excellent wear resistance, and can increase the wear resistance of roads and improve the service life of the roads and bridges when being used for road and bridge construction.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to cement for a road and bridge.
Background
The cement is a powdery hydraulic inorganic cementing material, is added with water and stirred to form slurry, can be hardened in air or in water better, and can firmly bond materials such as sand, stone and the like together. The method is widely applied to engineering such as civil construction, water conservancy, national defense and the like.
The cement for roads and bridges is special-purpose cement, and the wear resistance of the cement needs to be considered when the road and bridge construction is carried out, and the cement with strong anti-dispersion capability needs to be used when the bridge piers are carried out underwater construction so as to reduce the loss of the cement and ensure the strength of cement concrete. Therefore, the development of the cement for the road and bridge, which has good wear resistance and good dispersion resistance, has wide market prospect.
Disclosure of Invention
The invention aims to solve the technical problem of providing cement for a road and bridge.
The technical problem to be solved by the invention is realized by the following technical scheme:
the cement for the road and bridge comprises the following components in parts by weight:
100-150 parts of cement; 10-20 parts of palygorskite; 5-10 parts of nano aluminum hydroxide; 1-5 parts of calcium carbonate particles; 1-5 parts of zinc stearate; 0.1-1 part of titanium powder; 1-3 parts of polyacrylamide; 0.1-1 part of modified cellulose acetate.
Preferably, the cement for the road and bridge comprises the following components in parts by weight:
120-150 parts of cement; 15-20 parts of palygorskite; 5-8 parts of nano aluminum hydroxide; 1-3 parts of calcium carbonate particles; 1-3 parts of zinc stearate; 0.1-0.5 part of titanium powder; 1-2 parts of polyacrylamide; 0.1-0.5 part of modified cellulose acetate.
Further preferably, the cement for the road and bridge comprises the following components in parts by weight:
120 parts of cement; 15 parts of palygorskite; 5 parts of nano aluminum hydroxide; 3 parts of calcium carbonate particles; 3 parts of zinc stearate; 0.5 part of titanium powder; 2 parts of polyacrylamide; 0.5 part of modified cellulose acetate.
Preferably, the modified cellulose acetate is prepared by a method comprising the following steps:
sequentially adding cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine into dioxane, then carrying out heating reflux reaction, and dropwise adding methanol into a reaction solution after the reaction is finished until no precipitate is generated; and drying the precipitate to obtain the modified cellulose acetate.
More preferably, the dosage ratio of the dioxane, the cellulose acetate, the cardanol, the 3-phenylpropionyl chloride and the triethylamine is as follows: 300-400 mL, 12-16 g, 8-12 g, 2-3 g, 6-8 mL.
Most preferably, the dioxane, the cellulose acetate, the cardanol, the 3-phenylpropionyl chloride and the triethylamine are used in the following ratio: 350mL, 14g, 10g, 3g, 7 mL.
Further preferably, the reflux reaction time is 6-10 h.
Most preferably, the reflux reaction time is 8 h.
Further preferably, the cement is portland cement.
The invention also provides a concrete for roads and bridges, which is prepared by mixing the cement for roads and bridges as a cementing material with aggregate and water and then stirring.
Has the advantages that: the cement for the road and bridge provided by the invention has a brand new formula, has excellent anti-dispersion performance, and can reduce the loss of cement when being used for underwater construction, so that the strength of cement concrete after construction is ensured. In addition, the cement for the road and bridge has excellent wear resistance, and can increase the wear resistance of roads and improve the service life of the roads and bridges when being used for road and bridge construction.
Detailed Description
The present invention is further explained below with reference to specific examples, which are not intended to limit the present invention in any way.
Example 1
The cement for the road and bridge comprises the following components in parts by weight:
120 parts of cement (Portland cement with the grade of 42.5); 15 parts of palygorskite; 5 parts of nano aluminum hydroxide; 3 parts of calcium carbonate particles; 3 parts of zinc stearate; 0.5 part of titanium powder; 2 parts of polyacrylamide; 0.5 part of modified cellulose acetate.
The modified cellulose acetate is prepared by a method comprising the following steps:
sequentially adding cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine into dioxane, then carrying out heating reflux reaction for 8 hours, and dropwise adding methanol into a reaction solution after the reaction is finished until no precipitate is generated; and drying the precipitate to obtain the modified cellulose acetate. The dosage ratio of the dioxane, the cellulose acetate, the cardanol, the 3-phenylpropionyl chloride and the triethylamine is as follows: 350mL, 14g, 10g, 3g, 7 mL.
Example 2
The cement for the road and bridge comprises the following components in parts by weight:
100 parts of cement (Portland cement with grade 42.5); 10 parts of palygorskite; 5 parts of nano aluminum hydroxide; 5 parts of calcium carbonate particles; 5 parts of zinc stearate; 1 part of titanium powder; 1 part of polyacrylamide; 0.1 part of modified cellulose acetate.
The modified cellulose acetate is prepared by a method comprising the following steps:
sequentially adding cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine into dioxane, then carrying out heating reflux reaction for 8 hours, and dropwise adding methanol into a reaction solution after the reaction is finished until no precipitate is generated; and drying the precipitate to obtain the modified cellulose acetate. The dosage ratio of the dioxane, the cellulose acetate, the cardanol, the 3-phenylpropionyl chloride and the triethylamine is as follows: 350mL, 14g, 10g, 3g, 7 mL.
Example 3
The cement for the road and bridge comprises the following components in parts by weight:
150 parts of cement (Portland cement with grade 42.5); 20 parts of palygorskite; 10 parts of nano aluminum hydroxide; 1 part of calcium carbonate particles; 1 part of zinc stearate; 0.1 part of titanium powder; 3 parts of polyacrylamide; 1 part of modified cellulose acetate.
The modified cellulose acetate is prepared by a method comprising the following steps:
sequentially adding cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine into dioxane, then carrying out heating reflux reaction for 8 hours, and dropwise adding methanol into a reaction solution after the reaction is finished until no precipitate is generated; and drying the precipitate to obtain the modified cellulose acetate. The dosage ratio of the dioxane, the cellulose acetate, the cardanol, the 3-phenylpropionyl chloride and the triethylamine is as follows: 350mL, 14g, 10g, 3g, 7 mL.
Comparative example 1
The cement for the road and bridge comprises the following components in parts by weight:
120 parts of cement (Portland cement with the grade of 42.5); 15 parts of palygorskite; 5 parts of nano aluminum hydroxide; 3 parts of calcium carbonate particles; 3 parts of zinc stearate; 0.5 part of titanium powder; 2 parts of polyacrylamide; 0.5 part of cellulose acetate.
Comparative example 2
The cement for the road and bridge comprises the following components in parts by weight:
120 parts of cement (Portland cement with the grade of 42.5); 15 parts of palygorskite; 5 parts of nano aluminum hydroxide; 3 parts of calcium carbonate particles; 3 parts of zinc stearate; 0.5 part of titanium powder; 2.5 parts of polyacrylamide; 0.5 part of cellulose acetate.
Comparative example 3
The cement for the road and bridge comprises the following components in parts by weight:
120 parts of cement (Portland cement with the grade of 42.5); 2 parts of polyacrylamide; 0.5 part of modified cellulose acetate.
The modified cellulose acetate is prepared by a method comprising the following steps:
sequentially adding cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine into dioxane, then carrying out heating reflux reaction for 8 hours, and dropwise adding methanol into a reaction solution after the reaction is finished until no precipitate is generated; and drying the precipitate to obtain the modified cellulose acetate. The dosage ratio of the dioxane, the cellulose acetate, the cardanol, the 3-phenylpropionyl chloride and the triethylamine is as follows: 350mL, 14g, 10g, 3g, 7 mL.
And (3) performance testing: the cement, water, sand and crushed stone prepared in examples 1 to 3 and comparative examples 1 and 2 were mixed according to a ratio of 1: 0.47: 1.59: 3.39 to obtain concrete 1-5; the concrete 1-5 was tested for diffusivity (wherein a smaller diffusivity indicates better anti-dispersion performance) and 28d compressive strength, and the results are shown in Table 1.
TABLE 1 Cement Performance test results
| Degree of diffusion (mm) | 28d compressive Strength (MPa) | ||
| EXAMPLE 1 Cement | Concrete 1 | 262 | 95.1 |
| EXAMPLE 2 Cement | Concrete 2 | 271 | 82.3 |
| Example 3 Cement | Concrete 3 | 277 | 84.5 |
| Comparative example 1 Cement | Concrete 4 | 472 | 71.1 |
| Comparative example 2 Cement | Concrete 5 | 490 | 73.6 |
As can be seen from the data in Table 1, the diffusivity of the cement for the road and bridge prepared in the embodiments 1 to 3 is 260 to 280mm, and is far less than the diffusivity of the cement in the comparative examples 1 and 2. This shows that the cement for the road and bridge prepared by the invention has good anti-dispersion capability. In addition, the 28d compressive strength of the cement for the road and bridge prepared in the embodiments 1-3 of the invention is also superior to that of the cement prepared in the proportions 1 and 2.
The data of example 1 and comparative examples 1 and 2 also show that the addition of polyacrylamide and the modified cellulose acetate prepared by the invention to cement can greatly improve the anti-dispersion capability of cement, and the anti-dispersion capability of the cement is far greater than that of cement prepared by adding polyacrylamide alone and cement prepared by adding polyacrylamide and unmodified cellulose acetate.
The cement, water, sand and crushed stone for the road and bridge prepared in the examples 1 to 3 and the comparative example 1 were mixed according to the ratio of 1: 0.47: 1.59: 3.39 to obtain concrete 1-4; the dried concrete was cut into concrete blocks of 1kg in mass. Grinding the concrete 1-4 by using a wear-resistant testing machine for the same time, recording the mass of the concrete before and after grinding, and calculating the mass loss rate, wherein the smaller the mass loss rate is, the better the wear resistance is. Mass loss rate (mass before concrete grinding-mass after grinding)/mass before concrete grinding. The specific experimental results are shown in table 2.
TABLE 2 concrete abrasion resistance test results
| Mass before grinding | Mass after grinding | Mass loss rate | ||
| EXAMPLE 1 Cement | Concrete 1 | 1000g | 997g | 3‰ |
| EXAMPLE 2 Cement | Concrete 2 | 1000g | 992g | 8‰ |
| Example 3 Cement | Concrete 3 | 1000g | 994g | 6‰ |
| Comparative example 1 Cement | Concrete 4 | 1000g | 965g | 35‰ |
As can be seen from the experimental data in Table 1, the mass loss rate of the concrete prepared from the road and bridge cement in the embodiments 1 to 3 is less than 10 per mill and far less than 35 per mill of the concrete prepared in the comparative example 1, which indicates that the road and bridge cement prepared by the invention has very excellent wear resistance.
Claims (9)
1. The cement for the road and bridge is characterized by comprising the following components in parts by weight:
100-150 parts of cement; 10-20 parts of palygorskite; 5-10 parts of nano aluminum hydroxide; 1-5 parts of calcium carbonate particles; 1-5 parts of zinc stearate; 0.1-1 part of titanium powder; 1-3 parts of polyacrylamide; 0.1-1 part of modified cellulose acetate;
the modified cellulose acetate is prepared by a method comprising the following steps:
sequentially adding cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine into dioxane, then carrying out heating reflux reaction, and dropwise adding methanol into a reaction solution after the reaction is finished until no precipitate is generated; and drying the precipitate to obtain the modified cellulose acetate.
2. The cement for the road and bridge as claimed in claim 1, which is characterized by comprising the following components in parts by weight:
120-150 parts of cement; 15-20 parts of palygorskite; 5-8 parts of nano aluminum hydroxide; 1-3 parts of calcium carbonate particles; 1-3 parts of zinc stearate; 0.1-0.5 part of titanium powder; 1-2 parts of polyacrylamide; 0.1-0.5 part of modified cellulose acetate.
3. The cement for the road and bridge as claimed in claim 2, which is characterized by comprising the following components in parts by weight:
120 parts of cement; 15 parts of palygorskite; 5 parts of nano aluminum hydroxide; 3 parts of calcium carbonate particles; 3 parts of zinc stearate; 0.5 part of titanium powder; 2 parts of polyacrylamide; 0.5 part of modified cellulose acetate.
4. The cement for road and bridge according to claim 1, wherein the amount ratio of dioxane, cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine is: 300-400 mL, 12-16 g, 8-12 g, 2-3 g, 6-8 mL.
5. The cement for road and bridge according to claim 4, wherein the amount ratio of dioxane, cellulose acetate, cardanol, 3-phenylpropionyl chloride and triethylamine is as follows: 350mL, 14g, 10g, 3g, 7 mL.
6. The cement for the road and bridge according to claim 1, wherein the reflux reaction time is 6-10 h.
7. The cement for road and bridge according to claim 1, wherein the reflux reaction time is 8 hours.
8. The cement for road and bridge according to claim 1, wherein the cement is portland cement.
9. A concrete for roads and bridges, characterized by being prepared by using the cement for roads and bridges as claimed in any one of claims 1 to 8 as a cementitious material, mixing the cementitious material with aggregate and water, and then stirring the mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182352.1A CN108178585B (en) | 2018-02-28 | 2018-02-28 | Cement for road and bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182352.1A CN108178585B (en) | 2018-02-28 | 2018-02-28 | Cement for road and bridge |
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| Publication Number | Publication Date |
|---|---|
| CN108178585A CN108178585A (en) | 2018-06-19 |
| CN108178585B true CN108178585B (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810182352.1A Active CN108178585B (en) | 2018-02-28 | 2018-02-28 | Cement for road and bridge |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63206344A (en) * | 1987-02-23 | 1988-08-25 | 日本鋼管株式会社 | Cement composition for underwater concrete |
| CN103936355A (en) * | 2014-04-17 | 2014-07-23 | 山东大学 | Underwater dispersion-resistant porous concrete with large particle size and preparation method thereof |
| CN104119010A (en) * | 2014-08-15 | 2014-10-29 | 武汉理工大学 | Retarding type high-fluidity high-strength underwater concrete additive and preparation method thereof |
-
2018
- 2018-02-28 CN CN201810182352.1A patent/CN108178585B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63206344A (en) * | 1987-02-23 | 1988-08-25 | 日本鋼管株式会社 | Cement composition for underwater concrete |
| CN103936355A (en) * | 2014-04-17 | 2014-07-23 | 山东大学 | Underwater dispersion-resistant porous concrete with large particle size and preparation method thereof |
| CN104119010A (en) * | 2014-08-15 | 2014-10-29 | 武汉理工大学 | Retarding type high-fluidity high-strength underwater concrete additive and preparation method thereof |
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| CN108178585A (en) | 2018-06-19 |
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