CN115677281A - Sidewalk brick and preparation method thereof - Google Patents
Sidewalk brick and preparation method thereof Download PDFInfo
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- CN115677281A CN115677281A CN202211464640.9A CN202211464640A CN115677281A CN 115677281 A CN115677281 A CN 115677281A CN 202211464640 A CN202211464640 A CN 202211464640A CN 115677281 A CN115677281 A CN 115677281A
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- slag
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- cement
- sand
- sidewalk brick
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- 239000011449 brick Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 69
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 66
- 239000000203 mixture Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000013049 sediment Substances 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 239000004568 cement Substances 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004575 stone Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims description 57
- 238000003756 stirring Methods 0.000 claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000011049 filling Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002910 solid waste Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 14
- 238000007605 air drying Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 5
- 239000004566 building material Substances 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a sidewalk brick and a preparation method thereof, wherein the sidewalk brick comprises the following raw materials: lake sediment: 6% -11%, stone: 28% -32%, sand: 12% -13%, steel slag: 24% -34%, cement: 10% -14%, slag micropowder: 6 to 10 percent of slag micro powder, 0.8 to 1.2 percent of mixture of water glass and sodium hydroxide, and the water-material ratio: 0.07-0.12. In the formula, the steel slag is used for replacing part of sand and stone, so that the solid waste can be effectively recycled, and the compressive strength of the sidewalk brick can be improved. In addition, the slag micro powder is used for replacing part of cement, the activity of the slag micro powder is excited by the water glass and the sodium hydroxide, and the slag micro powder is fully mixed with the cement, so that a stronger bonding effect is achieved. The invention can consume solid waste, reduce environmental pollution, improve resource utilization rate, provide higher compressive strength and have good ecological economic effect.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a sidewalk brick and a preparation method thereof.
Background
China has a plurality of rivers and lakes, the rivers and lakes are polluted to different degrees due to human activities such as industrial and agricultural production in a plurality of areas with developed economy and dense population, and a large amount of pollutants are enriched in bottom mud to cause serious pollution of the bottom mud. Common sludge treatment and disposal modes at home and abroad mainly include yard storage, land utilization, building material utilization and the like, and China mainly uses dehydration landfill or yard storage at present and occupies a large amount of land resources.
The method for manufacturing the building material by using the lake sediment is a feasible method at present, related researches are carried out to manufacture the sidewalk brick by using the lake sediment, but the defects of low compressive strength and poor wear resistance exist in the practical use process. Aiming at the defects, the problems of low compressive strength and poor wear resistance of the sidewalk brick are solved by using lake sediment, steel slag, slag micro powder and the like as raw materials and adding an alkali-activated material. The raw materials have wide sources, low economic cost and no secondary pollution to the environment. Meanwhile, the steel slag and the slag micro powder belong to industrial wastes, and the steel slag and the slag micro powder are used as raw materials for manufacturing the sidewalk brick, so that the resource utilization of solid wastes can be realized.
Disclosure of Invention
The invention aims to provide a sidewalk brick, which is used for solving the problem of occupation of land by lake bottom mud, steel slag and slag micro powder, can provide a sidewalk brick product with high compressive strength and good wear resistance, reduces the production cost and obtains greater benefits.
The specific technical scheme of the invention is as follows:
a sidewalk brick is mainly prepared from the following raw materials in percentage by mass: lake sediment: 6% -11%, stone: 28% -32%, sand: 12% -13%, steel slag: 24% -34%, cement: 10% -14%, slag micropowder: 6 to 10 percent of the slag micro powder, the mixture of water glass and sodium hydroxide accounts for 0.8 to 1.2 percent of the slag micro powder, and the water-material ratio is as follows: 0.07-0.12.
The sidewalk brick is preferably prepared from the following raw materials in percentage by mass: 6% of lake sediment, 28% of stones, 12% of sand, 34% of steel slag, 12% of cement, 8% of slag micropowder, 1% of mixture of water glass and sodium hydroxide, and the water-material ratio: 0.1;
or mainly comprises the following raw materials by mass percent: the lake sediment 8%, the pebbles 28%, the sand 12%, the steel slag 32%, the cement 12%, the slag micropowder 8%, the mixture of the water glass and the sodium hydroxide accounts for 1% of the slag micropowder, and the water-material ratio is as follows: 0.1;
or mainly comprises the following raw materials by mass percent: 11% of lake sediment, 32% of stones, 13% of sand, 24% of steel slag, 12% of cement, 8% of slag micropowder, 1% of mixture of water glass and sodium hydroxide, and the water-material ratio: 0.1.
the mass ratio of the water glass to the sodium hydroxide is 1.
The lake sediment is dried sediment, the water content is less than 10%, and the particle size is not more than 0.5mm.
The particle size of the stones is 1-6mm, and the particle size of the sand is not more than 0.5mm.
The grain size of the steel slag is 6-9mm.
The mesh number of the slag micro powder is not less than 400 meshes.
The purity of the sodium hydroxide is 96%, and the particle size is not more than 0.5mm.
The invention also provides a preparation method of the sidewalk brick, which comprises the following steps:
(1) Naturally air-drying the lake sediment, removing large impurity particles and then crushing;
(2) Uniformly mixing the raw materials of the components according to the mass percentage, adding water according to the water-material ratio, and uniformly stirring to obtain a mixed material;
(3) And (3) filling the mixture obtained in the step (2) into a mold, and pressing to obtain a sidewalk brick product.
Uniformly mixing the raw materials of each component according to mass percentage in the step (2); the stirring conditions are as follows: the rotating speed is 50-60r/min, and the stirring time is at least 1 minute.
Adding water according to the water-material ratio in the step (2), wherein the stirring conditions are as follows: the rotating speed is 60-80r/min, and the stirring time is at least 2 minutes.
In the step (3), the hydraulic strength of the hydraulic machine is 18-22MPa.
The beneficial effects of the invention are as follows:
1. the lake bottom mud, the steel slag and the slag micro powder are used as main raw materials, the doping amount is large, the grain size range of the steel slag is wide, and the steel slag has the function of coarse aggregate. According to the formula, the lake sediment and the steel slag can be fully reduced through the compounding treatment of the lake sediment, the steel slag, the sand and the pebbles; the cement and the slag micro powder are added for compounding to generate a good bonding effect, and the problem of recycling of the slag micro powder is solved.
2. According to the invention, the steel slag is adopted to replace part of sand and stone in the formula, so that the solid waste can be effectively recycled, and the compressive strength and the wear resistance of the sidewalk brick can be improved. In addition, the slag micro powder is used for replacing part of cement, the activity of the slag micro powder is excited by the water glass and the sodium hydroxide, and the slag micro powder is fully mixed with the cement, so that a stronger bonding effect is achieved. The preparation method of the sidewalk brick can consume solid wastes, reduce environmental pollution, improve resource utilization rate, provide higher compressive strength and wear resistance, and have good ecological economic effect.
Detailed Description
The technical solution of the present invention will be described in detail and fully with reference to the following examples, and it should be understood that the described examples are only a part of the examples of the present invention, and not all of the examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a sidewalk brick, and the main components of the sidewalk brick are prepared according to the proportion shown in table 1.
A preparation method of a sidewalk brick comprises the following steps:
(1) Naturally air-drying the lake sediment until the water content is lower than 10%, removing large impurity particles, and then crushing;
(2) Uniformly stirring lake sediment with the particle size not more than 0.5mm, stones with the particle size of 1-6mm, sand with the particle size not more than 0.5mm, steel slag with the particle size of 6-9mm, cement, slag micro powder with the mesh number not less than 400, water glass and sodium hydroxide with the particle size not more than 0.5mm according to the mixture ratio shown in table 1 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 60r/min and the stirring time is 6 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mould, and naturally curing the mixture after hydraulic pressure of a hydraulic press under 20MPa to obtain the sidewalk brick product.
Example 2
The embodiment provides a sidewalk brick, and the main components of the sidewalk brick are prepared according to the proportion shown in table 1.
A preparation method of sidewalk bricks comprises the following steps:
(1) Naturally air-drying the lake sediment, removing large impurity particles and then crushing;
(2) Uniformly stirring lake sediment with the particle size not more than 0.5mm, stones with the particle size of 1-6mm, sand with the particle size not more than 0.5mm, steel slag with the particle size of 6-9mm, cement, slag micro powder with the mesh number not less than 400, water glass and sodium hydroxide with the particle size not more than 0.5mm according to the mixture ratio shown in table 1 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding the stirring water into the mixed material in the step (2), and uniformly stirring at the rotation speed of 70r/min for 5 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mold, performing hydraulic pressure by a hydraulic press under 20MPa, and performing natural curing to obtain the sidewalk brick product.
Example 3
The embodiment provides a sidewalk brick, and the main components of the sidewalk brick are prepared according to the proportion shown in table 1.
A preparation method of sidewalk bricks comprises the following steps:
(1) Naturally air-drying the lake sediment, removing large impurity particles and then crushing;
(2) Uniformly stirring lake sediment with the particle size of not more than 0.5mm, stones with the particle size of 1-6mm, sand with the particle size of not more than 0.5mm, steel slag with the particle size of 6-9mm, cement, slag micro powder with the mesh number of not less than 400, water glass and sodium hydroxide with the particle size of not more than 0.5mm according to the mixture ratio shown in table 1 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 80r/min and the stirring time is 4 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mold, performing hydraulic pressure by a hydraulic press under 20MPa, and performing natural curing to obtain the sidewalk brick product.
Comparative example 1
The comparative example provides a sidewalk brick, the main components of which are prepared according to the mixture ratio shown in table 2.
A preparation method of a sidewalk brick comprises the following steps:
(1) Naturally drying the lake sediment, removing large impurity particles, and then crushing;
(2) Uniformly stirring lake sediment with the particle size of not more than 0.5mm, stone powder with the particle size of not more than 5mm, gold tailing sand with the particle size of not more than 0.5mm, steel slag with the particle size of 6-9mm, cement, slag micro powder with the mesh number of not less than 400 meshes, water glass and sodium hydroxide with the particle size of not more than 0.5mm according to the mixture ratio shown in table 2 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 60r/min and the stirring time is 6 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mold, performing hydraulic pressure by a hydraulic press under 20MPa, and performing natural curing to obtain the sidewalk brick product.
Comparative example 2
The comparative example provides a sidewalk brick, the main components of which are prepared according to the mixture ratio shown in table 2.
A preparation method of a sidewalk brick comprises the following steps:
(1) Naturally air-drying the lake sediment, removing large impurity particles and then crushing;
(2) Uniformly stirring lake sediment with the particle size not more than 0.5mm, stone powder with the particle size not more than 5mm, gold tailing sand with the particle size not more than 0.5mm, steel slag with the particle size of 6-9mm, cement, slag micro powder with the mesh number not less than 400, water glass and sodium hydroxide with the particle size not more than 0.5mm according to the mixture ratio shown in table 2 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 70r/min and the stirring time is 5 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mold, performing hydraulic pressure by a hydraulic press under 20MPa, and performing natural curing to obtain the sidewalk brick product.
Comparative example 3
The comparative example provides a sidewalk brick, the main components of which are prepared according to the mixture ratio shown in table 2.
A preparation method of a sidewalk brick comprises the following steps:
(1) Naturally drying the lake sediment, removing large impurity particles, and then crushing;
(2) Uniformly stirring lake sediment with the particle size not more than 0.5mm, stone powder with the particle size not more than 5mm, steel slag with the particle size of 6-9mm, gold tailing sand with the particle size not more than 0.5mm, slag micro powder with the mesh number not less than 400, water glass and sodium hydroxide with the particle size not more than 0.5mm according to the mixture ratio shown in table 2 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 80r/min and the stirring time is 4 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mold, performing hydraulic pressure by a hydraulic press under 20MPa, and performing natural curing to obtain the sidewalk brick product.
Comparative example 4
The present comparative example provides a sidewalk brick, the main components of which are prepared by the formulation shown in table 3.
A preparation method of a sidewalk brick comprises the following steps:
(1) Naturally air-drying the lake sediment, removing large impurity particles and then crushing;
(2) Uniformly stirring lake sediment with the particle size not more than 0.5mm, stones with the particle size of 1-6mm, sand with the particle size not more than 0.5mm, steel slag with the particle size of 6-9mm and cement according to the mixture ratio shown in Table 3 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 75r/min and the stirring time is 4 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a mold, performing hydraulic pressure by a hydraulic press under 20MPa, and performing natural curing to obtain the sidewalk brick product.
Comparative example 5
The comparative example provides a sidewalk brick prepared from the main components in the proportions shown in Table 3.
A preparation method of a sidewalk brick comprises the following steps:
(1) Naturally air-drying the lake sediment, removing large impurity particles and then crushing;
(2) Uniformly stirring lake sediment with the particle size not more than 0.5mm, stones with the particle size of 1-6mm, sand with the particle size not more than 0.5mm, steel slag with the particle size of 6-9mm, cement, red mud with the mesh number not less than 200 meshes, slag micro powder with the mesh number not less than 400 meshes, water glass and sodium hydroxide with the particle size not more than 0.5mm according to the mixture ratio shown in the table 3 under the conditions that the rotating speed is 55r/min and the stirring time is 2 minutes to obtain a mixed material;
(3) Adding stirring water into the mixed material in the step (2), and uniformly stirring under the conditions that the rotating speed is 65r/min and the stirring time is 5 minutes to obtain a mixture;
(4) And (4) filling the mixture obtained in the step (3) into a die, and performing hydraulic pressure by a hydraulic press under 20MPa and natural curing to obtain a pedestrian brick product.
Comparative example 6
Yuyi et al (Yuyi, fanglichun, zhang Kai, yingxiao, zhuxiong. River silt preparation baking-free brick test research [ J ]. Novel building material, 2021, 02. Wherein the cement mixing amount is fixed to be 10% of the total amount, and the river sludge and the rock saltpeter are 90% of the total amount. The specific mixing ratio is shown in Table 4. The invention selects the baking-free brick with the river sediment mixing amount of 9 percent as the comparison.
Table 1 pavement brick in different embodiments raw material ratio
Table 2 different comparative example raw material ratios of sidewalk bricks 1
TABLE 3 pavement brick different comparative example raw material ratio 2
In tables 1 to 3, the mass ratio of water glass to sodium hydroxide is 1.
TABLE 4 raw material ratio of baking-free brick prepared from river sludge
After the prepared sidewalk brick is naturally maintained for 7d and 28d, the compressive strength of the sidewalk brick is tested by a compressive testing machine, the abrasion resistance length of the sidewalk brick is tested according to the method for testing the abrasion resistance of inorganic ground materials (GB/T12988-2009), and the test results are shown in Table 5.
TABLE 5 sidewalk bricks 7d, 28d compressive strength
As can be seen from the comparison results in Table 5, the sidewalk brick prepared by the present invention can be cured under natural conditions and has excellent compressive strength. The raw material comparison shows that the added stone powder and the gold tailing sand have great influence on the compressive strength of the pavement brick, and the influence effect is increased along with the continuous increase of the addition amount. As can be seen from the comparison of the cementing materials, the compressive strength effect of the cementing material compounded by cement and slag micropowder is superior to that of other types of cementing materials, so that the optimal cementing material proportion of the sidewalk brick is invented. As can be seen from table 5 abrasion resistance length, the pavement bricks prepared by the present invention have higher abrasion resistance, wherein the abrasion resistance length of the pavement bricks prepared in the examples is larger than that of the pavement bricks prepared in the comparative examples.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The sidewalk brick is characterized by mainly comprising the following raw materials in percentage by mass: lake sediment: 6% -11%, stone: 28% -32%, sand: 12% -13%, steel slag: 24% -34%, cement: 10% -14%, slag micropowder: 6 to 10 percent of the slag micro powder, the mixture of water glass and sodium hydroxide accounts for 0.8 to 1.2 percent of the slag micro powder, and the water-material ratio is as follows: 0.07-0.12.
2. The sidewalk brick according to claim 1, which is prepared from the following raw materials in percentage by mass: 6% of lake sediment, 28% of stones, 12% of sand, 34% of steel slag, 12% of cement, 8% of slag micropowder, 1% of mixture of water glass and sodium hydroxide, and the water-material ratio: 0.1;
or mainly comprises the following raw materials by mass percent: the lake sediment 8%, the pebbles 28%, the sand 12%, the steel slag 32%, the cement 12%, the slag micropowder 8%, the mixture of the water glass and the sodium hydroxide accounts for 1% of the slag micropowder, and the water-material ratio is as follows: 0.1;
or mainly comprises the following raw materials by mass percent: 11% of lake sediment, 32% of stones, 13% of sand, 24% of steel slag, 12% of cement, 8% of slag micropowder, 1% of mixture of water glass and sodium hydroxide, and the water-material ratio: 0.1;
the mass ratio of the water glass to the sodium hydroxide is 1.
3. A sidewalk brick as claimed in claim 1, wherein the lake sediment is dried sediment, the water content is less than 10%, and the grain size is not more than 0.5mm.
4. A pavement brick according to claim 1, wherein the stone particles have a size of 1-6mm and the sand particles have a size of not more than 0.5mm.
5. The sidewalk brick as claimed in claim 1, wherein the steel slag has a particle size of 6-9mm.
6. A sidewalk brick as claimed in claim 1, wherein the mesh number of the slag micro powder is not less than 400 meshes.
7. A method of manufacturing a pavement brick according to any of claims 1 to 6, comprising the steps of:
(1) Naturally drying the lake sediment, removing large impurity particles, and then crushing, wherein the particle size is not more than 0.5mm;
(2) Uniformly mixing the raw materials of the components according to the mass percent, adding water according to the water-material ratio, and uniformly stirring to obtain a mixed material;
(3) And (3) filling the mixture obtained in the step (2) into a mold, and pressing to obtain a sidewalk brick product.
8. The preparation method according to claim 7, characterized in that, in the step (2), the raw materials of each component are uniformly mixed according to the mass percentage; the stirring conditions are as follows: the rotating speed is 50-60r/min, and the stirring time is at least 1 minute.
9. The preparation method of claim 7, wherein water is added in step (2) according to the water-material ratio, and the stirring conditions are as follows: the rotating speed is 60-80r/min, and the stirring time is at least 2 minutes.
10. The preparation method according to claim 7, wherein the step (3) is carried out by hydraulic forming by a hydraulic press; the hydraulic strength is 18-22MPa.
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| CN107082598A (en) * | 2017-06-20 | 2017-08-22 | 合肥慧林建材有限公司 | A kind of environment-friendly type pavior brick and preparation method using riverbed sludge as major ingredient |
| CN108439886A (en) * | 2018-05-04 | 2018-08-24 | 合肥慧林建材有限公司 | It is a kind of using waste as permeable pavement brick of raw material and preparation method thereof |
| CN108727038A (en) * | 2018-07-19 | 2018-11-02 | 董春年 | A kind of steel slag concrete brick and preparation method thereof |
| CN109987900A (en) * | 2019-04-23 | 2019-07-09 | 湖南云中再生科技股份有限公司 | One kind is with building waste cementitious material as main component and preparation method thereof |
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