CN117164258B - Green low-carbon cement for roadbed and preparation method thereof - Google Patents
Green low-carbon cement for roadbed and preparation method thereof Download PDFInfo
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- CN117164258B CN117164258B CN202311212832.5A CN202311212832A CN117164258B CN 117164258 B CN117164258 B CN 117164258B CN 202311212832 A CN202311212832 A CN 202311212832A CN 117164258 B CN117164258 B CN 117164258B
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- 239000004568 cement Substances 0.000 title claims abstract description 65
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000010440 gypsum Substances 0.000 claims abstract description 12
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 12
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 11
- -1 alkenyl sulfonate Chemical compound 0.000 claims abstract description 11
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract description 11
- 239000011734 sodium Substances 0.000 claims abstract description 11
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 11
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 11
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 11
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 10
- 235000019738 Limestone Nutrition 0.000 claims abstract description 8
- 239000006028 limestone Substances 0.000 claims abstract description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 17
- 239000002994 raw material Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- AGWMJKGGLUJAPB-UHFFFAOYSA-N aluminum;dicalcium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Ca+2].[Ca+2].[Fe+3] AGWMJKGGLUJAPB-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses green low-carbon cement for roadbed and a preparation method thereof, belonging to the technical field of cement preparation. The green low-carbon cement for the roadbed consists of the following components in parts by weight: 25 parts of limestone; 15-20 parts of slag powder; 30-35 parts of fly ash or slag; 5-6 parts of desulfurized gypsum; 20-25 parts of cement clinker; 1 part of powder excitant; the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1. The invention greatly improves the 28d compressive strength and the flexural strength of cement by optimizing the composition of the powder excitant under the condition of less cement clinker consumption, prolongs the initial setting time and the final setting time of the cement, is convenient for the site construction of the cement, and has low cost.
Description
Technical Field
The invention relates to the technical field of cement preparation, in particular to green low-carbon cement for roadbed and a preparation method thereof.
Background
The roadbed cement is a hydraulic cementing material prepared by taking one or more than one active mixed materials or hydraulic industrial waste as main raw materials, adding a proper amount of silicate cement clinker and gypsum, and grinding. The roadbed cement has the following problems due to raw materials: the setting time is too fast, which is unfavorable for road construction; the cement clinker has different input amounts and different strengths, and how to balance the cost and the strength becomes a great difficulty.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide green low-carbon cement for roadbed and a preparation method thereof, wherein the green low-carbon cement has low carbon, low cost, ideal curing time and good curing effect.
In order to solve the technical problems, the invention provides the following technical scheme:
on the one hand, the invention provides green low-carbon cement for roadbed, which comprises the following components in parts by weight:
the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1.
Preferably, the green low-carbon cement for the roadbed comprises the following components in parts by weight:
preferably, the cement clinker consists of the following components in percentage by mass:
preferably, the free calcium oxide in the desulfurized gypsum is not more than 10 percent, SO 3 38% and 16% moisture.
On the other hand, the invention also provides a preparation method of the green low-carbon cement for the roadbed, which comprises the following steps: mixing and grinding limestone, slag powder, fly ash or slag, desulfurized gypsum, cement clinker and powder excitant to obtain green low-carbon cement for roadbed, wherein the fineness of the green low-carbon cement is less than or equal to 15 percent and 45 mu m.
Compared with the prior art, the invention has the following beneficial effects:
the green low-carbon cement for the roadbed has the characteristics of excellent technical indexes of the roadbed, low engineering cost, convenient construction and shortened construction period, and is particularly favorable for ecological environment protection. The green low-carbon cement for the roadbed can replace a large amount of lime, cement, fly ash, broken stone, gravel and other traditional road building materials, so that the resources and energy are saved, the land is saved, the vegetation is protected, the emission of carbon dioxide and other room gases is greatly reduced, the ecological environment is protected, and the economic and environmental benefits are particularly obvious.
The invention greatly improves the 28d compressive strength and the flexural strength of cement by optimizing the composition of the powder excitant under the condition of less cement clinker consumption, prolongs the initial setting time and the final setting time of the cement, is convenient for the site construction of the cement, and has low cost. Compared with the traditional curing materials such as cement, lime and the like, the cement-lime composite material has better performance and economic and environmental benefits; the special problems that cementing materials such as cement, lime and fly ash are difficult to solve in the process of reinforcing the pavement are also solved, and the method has unique curing effect and wide practicability.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention more apparent, the following detailed description will be made with reference to specific embodiments.
The materials and reagents used in the present invention are not specifically described and are commercially available. The cement clinker comprises the following components in percentage by mass: 60% of tricalcium silicate; dicalcium silicate 20%; tricalcium aluminate 8%; tetracalcium aluminoferrite 12%. Free calcium oxide in the desulfurized gypsum is not more than 10 percent, SO 3 38% and 16% moisture.
The invention provides green low-carbon cement for roadbed and a preparation method thereof, and specific examples are as follows.
Example 1
The green low-carbon cement for the roadbed consists of the following components in parts by weight:
25 parts of limestone; 19 parts of slag powder; 30 parts of fly ash; 6 parts of desulfurized gypsum; 20 parts of cement clinker; 1 part of powder excitant;
the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1.
The preparation method of the green low-carbon cement for the roadbed comprises the following steps: mixing and grinding limestone, slag powder, fly ash, desulfurized gypsum, cement clinker and powder excitant to obtain green low-carbon cement for roadbed, wherein the fineness of 45 mu m is less than or equal to 15%; specific:
(1) Pulverizing the raw material components separately, and removing the screen residue with the diameter of more than 200 μm by a screen;
(2) Adding the raw material components into a stirrer according to the weight proportion, and uniformly mixing to obtain initial mixed raw material powder;
(3) And (3) grinding the mixed raw material powder for multiple times through a roller press, a ball mill and a high-efficiency powder selector to obtain a high-speed roadbed cement finished product, wherein the fineness of the mixed raw material powder is required to be 45 mu m to be less than or equal to 15%.
Example 2
The green low-carbon cement for the roadbed consists of the following components in parts by weight:
25 parts of limestone; 15 parts of slag powder; 35 parts of fly ash; 5 parts of desulfurized gypsum; 20 parts of cement clinker; 1 part of powder excitant;
the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1.
The preparation method is the same as in example 1.
Example 3
The green low-carbon cement for the roadbed consists of the following components in parts by weight:
25 parts of limestone; 15 parts of slag powder; 30 parts of fly ash; 5 parts of desulfurized gypsum; 25 parts of cement clinker; 1 part of powder excitant;
the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1.
The preparation method is the same as in example 1.
Example 4
The green low-carbon cement for the roadbed consists of the following components in parts by weight:
25 parts of limestone; 18 parts of slag powder; 32 parts of fly ash; 6 parts of desulfurized gypsum; 24 parts of cement clinker; 1 part of powder excitant;
the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1.
The preparation method is the same as in example 1.
To further illustrate the beneficial effects of the present invention, the following comparative example was constructed with limited space by taking example 1 as an example only.
Comparative example 1
In this comparative example, the powder activator was omitted, and the other conditions were the same as in example 1.
Comparative example 2
In the comparative example, the powder excitant is a mixture of alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 1:1; the other conditions were the same as in example 1.
Comparative example 3
In the comparative example, the powder excitant is a mixture of sodium sulfate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:2; the other conditions were the same as in example 1.
Comparative example 4
In the comparative example, the powder excitant is a mixture of sodium sulfate and alpha-sodium alkenyl sulfonate with the mass ratio of 3:2; the other conditions were the same as in example 1.
Comparative example 5
In the comparative example, the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 1:1:1; the other conditions were the same as in example 1.
Comparative example 6
In the comparative example, the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 6:1:1; the other conditions were the same as in example 1.
Cements were prepared using examples 1-4 and comparative examples 1-6 described above for performance testing according to GB175-2007 general Portland Cement, and the test results are shown in tables 1-2.
TABLE 1
| Physical Properties | Example 1 | Example 2 | Example 3 | Example 4 |
| 28d compression (MPa) | 26.1 | 24.5 | 30.8 | 30.2 |
| 28d bending resistance (MPa) | 6.4 | 5.7 | 7.1 | 7.2 |
| Standard consistency (%) | 26.2 | 24.0 | 25.3 | 25.0 |
| Initial setting time (min) | 268 | 254 | 247 | 264 |
| Final setting time (min) | 315 | 280 | 279 | 306 |
| Specific surface area (m) 2 /kg) | 433 | 512 | 483 | 507 |
| Cost (Yuan/ton) | 132.45 | 140.84 | 151.53 | 154.6 |
As is clear from the above Table 1, the green low-carbon cement for roadbed of the present invention has low clinker blending ratio, but achieves good compressive strength, and has high economic benefit. The strength of more than 24.5MPa can be achieved by only using 20% of cement clinker mixing ratio, and the cement clinker mixing ratio is a very cost-effective choice for building of some rural roads. The cement clinker consumption is less, the batching cost is as low as 132.45 yuan/ton, and the cost is reduced by 33.78 percent compared with the cost of ordinary Portland cement of about 200 yuan.
TABLE 2
As shown in the table 2, the powder exciting agent can greatly improve the 28d compressive strength and the flexural strength of cement and effectively prolong the initial setting time and the final setting time. Cement prepared by changing the types of powder excitants (comparative examples 1-4) or the proportion relation of the powder excitants and the cement (comparative examples 5-6) has reduced 28d compression resistance and flexural strength, correspondingly shortened initial setting time and final setting time, and is unfavorable for construction. And the specific surface area of the cements prepared in comparative examples 1 to 6 is correspondingly reduced.
In summary, the invention greatly improves the 28d compressive strength and the flexural strength of cement by optimizing the composition of the powder excitant under the condition of less cement clinker consumption, prolongs the initial setting time and the final setting time of the cement, is convenient for the site construction of the cement, and has low cost.
While the foregoing is directed to the preferred embodiments of the present invention, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the principles of the invention.
Claims (2)
1. The green low-carbon cement for the roadbed is characterized by comprising the following components in parts by weight:
the powder excitant is a mixture of sodium sulfate, alpha-sodium alkenyl sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt in a mass ratio of 3:1:1;
the cement clinker comprises the following components in percentage by mass:
the free calcium oxide in the desulfurized gypsum is not more than 10 percent and SO is not more than 3 10-25% and 15-25% of water.
2. The method for preparing the green low-carbon cement for the roadbed, which is characterized in that limestone, slag powder, fly ash or slag, desulfurized gypsum, cement clinker and powder excitant are mixed and ground into powder, so that the green low-carbon cement for the roadbed with the fineness of 45 μm being less than or equal to 15% is obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311212832.5A CN117164258B (en) | 2023-09-20 | 2023-09-20 | Green low-carbon cement for roadbed and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311212832.5A CN117164258B (en) | 2023-09-20 | 2023-09-20 | Green low-carbon cement for roadbed and preparation method thereof |
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| CN117164258B true CN117164258B (en) | 2024-04-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531421A (en) * | 2010-12-13 | 2012-07-04 | 北京金源化学集团有限公司 | Cement with low carbon dioxide emission and preparation method thereof |
| CN108623196A (en) * | 2018-06-15 | 2018-10-09 | 东南大学 | A kind of lime excitation large dosage industrial residue low-carbon cement and preparation method thereof |
| CN112110684A (en) * | 2020-09-01 | 2020-12-22 | 武汉鑫云海混凝土有限公司 | Large-mixing-amount fly ash concrete and preparation method thereof |
| CN113277757A (en) * | 2021-06-29 | 2021-08-20 | 五河中联水泥有限公司 | High-speed roadbed cement and application method thereof |
-
2023
- 2023-09-20 CN CN202311212832.5A patent/CN117164258B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531421A (en) * | 2010-12-13 | 2012-07-04 | 北京金源化学集团有限公司 | Cement with low carbon dioxide emission and preparation method thereof |
| CN108623196A (en) * | 2018-06-15 | 2018-10-09 | 东南大学 | A kind of lime excitation large dosage industrial residue low-carbon cement and preparation method thereof |
| CN112110684A (en) * | 2020-09-01 | 2020-12-22 | 武汉鑫云海混凝土有限公司 | Large-mixing-amount fly ash concrete and preparation method thereof |
| CN113277757A (en) * | 2021-06-29 | 2021-08-20 | 五河中联水泥有限公司 | High-speed roadbed cement and application method thereof |
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| CN117164258A (en) | 2023-12-05 |
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