CN111662057A - Self-snow-melting color square brick and preparation method thereof - Google Patents
Self-snow-melting color square brick and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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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
- 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
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
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- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a self-snow-melting color square brick and a preparation method thereof, belonging to the technical field of building materials, and the self-snow-melting color square brick sequentially comprises the following components from bottom to top: a bearing layer with the thickness of 50-100mm and a colorful self-melting snow abrasion layer with the thickness of 0.5-2 mm. The colored self-snow-melting wearing layer uses hydrophobic low-freezing-point filler, realizes the self-snow-melting function by reducing the freezing temperature of water and the adhesive force between ice and snow and the surface of the square brick, can effectively avoid the time and labor waste of the existing manual cleaning method, and has poor effect on places with thicker ice layers and lower temperature; the mechanical cleaning method is easy to cause the damage of the surface and the structure of the color square brick, and the aesthetic degree and the service life are influenced; the snow-melting agent has the defect of causing fatal damage to metal objects in urban greening and urban affiliated facilities.
Description
Technical Field
The invention belongs to the technical field of building materials, and relates to a color square brick, in particular to a self-snow-melting color square brick and a preparation method thereof.
Background
With the rapid development of national economy, city construction in China is also changing day by day, the requirements of people on living and living environment are higher and higher, and the colorful square bricks are more and more favored by people with colorful charm. The colour square brick is a new pavement material made up by using flyash, cinder, coal gangue, tailings slag, chemical slag or natural sand, tidal marsh mud and fuel as main raw material and using cement as solidifying agent, and has the advantages of high strength, good durability, standard size, complete appearance, uniform colour and lustre and simple and natural appearance. The method is mainly used for environment beautifying projects of sidewalks, parking lots, squares, courtyards and residential districts in municipal engineering, not only achieves the use function, but also improves the grade of buildings, and plays a positive role in beautifying the environment by reflecting with the surrounding environment.
Although the color square bricks are widely applied in urban construction in China in recent years and are more and more accepted by people, the defects that the color square bricks cannot be avoided exist in the actual use process, particularly in rainy and snowy seasons in winter, the traditional color square bricks are easy to adhere to ice and snow due to large surface roughness, and great potential safety hazards are brought to people going out. Therefore, how to eliminate the potential safety hazard under the ice and snow condition and improve the trip safety becomes a technical problem to be solved urgently in the road engineering field.
At present, the main methods for removing the ice and snow on the surface of the color square brick are snow melting agent spreading, manual removing method and mechanical removing method. The manual cleaning method is time-consuming and labor-consuming, and has poor effect on places with thicker ice layers and lower air temperatures; although the mechanical cleaning method has higher efficiency, the surface and the structure of the color square brick are easily damaged, and the attractiveness and the service life are influenced; the snow melting agent is time-saving and labor-saving in spreading and good in clearing effect, but the conventional snow melting agent in the market at present adopts industrial salt, and the industrial salt can infiltrate into soil along with rainwater to cause fatal damage to urban landscaping while melting snow, and has extremely strong corrosivity to metal objects in urban affiliated facilities.
Based on the potential safety hazard brought by the existing color square bricks in winter ice and snow weather, and the traditional ice and snow removing measures have a plurality of limitations, the color square bricks with the automatic ice and snow melting function are needed to be developed, the adhesion force of ice and snow on the surfaces of the color square bricks and the ice and snow freezing point can be greatly reduced, and the color square bricks have important practical significance for prolonging the service life of road surfaces and improving the safety of traveling.
Disclosure of Invention
The color square brick realizes the self-snow-melting function by reducing the freezing temperature of water and the adhesive force between ice and snow and the surface of the square brick, has the characteristics of wide application range, good ice and snow removing effect, high labor cost saving, good durability, high safety, long service life and the like, and has the advantages of wide material source, simple and environment-friendly production process and field laying and equivalent manufacturing cost to that of the traditional color square brick during production.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a self-snow-melting colored square brick sequentially comprises from bottom to top: a bearing layer with the thickness of 50-100mm and a colorful self-snow-melting wearing layer with the thickness of 0.5-2 mm; the bearing layer comprises 10-40 parts of fine aggregate, 20-70 parts of coarse aggregate, 8-20 parts of cement, 0.5-5 parts of admixture and 4-10 parts of water by weight, and the total weight is 100 parts; the color self-snow-melting wearing layer comprises, by weight, 5-20 parts of white portland cement, 5-15 parts of inorganic toner, 60-85 parts of fine river sand and 5-10 parts of hydrophobic low-freezing-point filler, wherein the total amount is 100 parts.
Further, the fine aggregate is one or a mixture of more than two of river sand, machine-made sand, stone chips, mountain sand, fly ash, volcanic ash, tailing slag and steel slag, and the particle size of the fine aggregate is less than 4.75 mm.
Furthermore, the coarse aggregate is macadam with the particle size of 2.36mm-9.5mm, and the quality technical index of the macadam meets the requirements of road macadam in technical Specification for road asphalt pavement construction (JTG F40-2004).
Furthermore, the cement is one of ordinary portland cement, portland slag cement, pozzolanic portland cement, fly ash portland cement, composite portland cement and road portland cement, the 28-day compressive strength is not lower than 42.5Mpa, and other indexes meet the requirements of general portland cement (GB 175-2007).
Further, the admixture is a sulfate early strength agent, and the quality technical index meets the requirements of GB8076-2008 concrete admixture Specification.
Further, the water meets drinking water standards.
Furthermore, the 28-day compressive strength of the white Portland cement is not lower than 42.5Mpa, and other indexes meet the requirements of the general Portland cement (GB 175-2007).
Further, the inorganic toner is various metal oxides, chromates, and the like, and the maximum particle size is less than 0.6 mm.
Furthermore, the fine river sand meets the technical standard of building sand (GB/T14684-2001), wherein the fineness modulus is 0.7-1.5.
Further, the hydrophobic low-freezing-point filler is prepared from one of calcium chloride, calcium acetate, calcium magnesium oxalate and calcium chloride dihydrate, porous volcanic ash and a slow-release agent according to a weight ratio of 40: 58: 2, the maximum particle size of the hydrophobic low freezing point filler is less than 0.6 mm.
Further, the porosity of the porous volcanic ash is not less than 50%.
Further, the relative density of the sustained release agent is not less than 2.500, and the main function is to prevent the rapid loss of calcium ions and chloride ions and rainwater.
The invention also provides a preparation method of the self-snow-melting colored square brick, which comprises the following steps:
1. weighing 40 parts by weight of one of calcium chloride, calcium acetate, calcium magnesium oxalate and calcium chloride dihydrate, weighing 58 parts by weight of porous volcanic ash, and weighing 2 parts by weight of sustained-release agent;
2. mixing and grinding the product obtained in the step 1 for 10-30 minutes by a ball mill until the maximum particle size is less than 0.6 mm;
3. putting the product obtained in the step (2) into a stirrer, adding water with the mass ratio of 20%, and stirring at the speed of 20-30 r/min for 8-12 h;
4. taking out the product obtained in the step 3, and drying the product in a drying oven at 105 +/-5 ℃;
5. weighing 5-20 parts of white portland cement, 5-15 parts of inorganic toner, 60-85 parts of fine river sand and 5-10 parts of the product obtained in the step 4 by weight, adding the total 100 parts of the product into a ball mill, mixing and grinding for 20-30 minutes until the maximum particle size is less than 0.6mm, and stopping grinding to obtain a mixture for the color self-snow-melting wearing layer;
6. weighing 10-40 parts of fine aggregate, 20-70 parts of coarse aggregate, 8-20 parts of cement and 0.5-5 parts of admixture by weight, and putting the mixture into a forced stirrer for dry mixing for 30-50 s;
7. weighing 4-10 parts of water according to the weight, adding the water into the product obtained in the step 6, and then forcibly stirring for 20-40s to obtain a mixture for the bearing layer;
8. placing a color square brick mould on a working platform of a hydraulic brick making machine, and uniformly spreading the product obtained in the step 5 into the mould, wherein the spreading thickness is 1.3-1.5 times of the forming thickness of the wearing layer;
9. adding the product obtained in the step 7 into the product obtained in the step 8, wherein the adding thickness of the product obtained in the step 7 is 1.25-1.35 times of the forming thickness of the bearing layer;
10. starting a hydraulic brick making machine, stopping the brick making machine when the thickness of the color square bricks reaches the designed thickness, and then demoulding the color square bricks;
11. and (3) carrying out constant-temperature and constant-humidity curing on the product obtained in the step (10), wherein the curing temperature is 20 ℃, the curing humidity is more than 95%, and the curing time is not less than 28d, so that the color square brick is obtained.
Furthermore, the performance indexes of the self-snow-melting colored square brick prepared by the steps can reach: the 28-day compressive strength is more than or equal to 20Mpa, the 28-day flexural strength is more than or equal to 3.0Mpa, the friction coefficient (BPN) is more than or equal to 50, the adhesion force between the ice surface and the square brick is less than 0.15KN at-30 ℃, and the adhesion force between the ice surface and the square brick is less than 0.05KN at-20 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the self-snow-melting colored square brick developed by the invention has the advantages of simple production process, rich raw material sources, low production cost, good durability, high safety and long service life, adopts the hydrophobic low-freezing-point filler, realizes the self-snow-melting function by reducing the freezing temperature of water and the adhesive force between ice and snow and the surface of the square brick, can effectively avoid the time and labor waste of the existing manual removal method, and has poor effect on places with thicker ice layers and lower air temperatures; the mechanical cleaning method is easy to cause the damage of the surface and the structure of the color square brick, and the aesthetic degree and the service life are influenced; the snow-melting agent has the defect of causing fatal damage to metal objects in urban greening and urban affiliated facilities.
Drawings
Fig. 1 is a schematic structural view of a self-snow-melting colored square brick disclosed by the invention. Wherein, 1 is a self-snow-melting colorful wearing layer and 2 is a bearing layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example 1
A self-snow-melting red square brick with a bearing layer thickness of 50mm and a wearing layer thickness of 0.5mm has the following technical scheme:
the fine aggregate used in the bearing layer mixture is river sand produced by Lasa river of Lasa City of autonomous region of Tibet, the maximum grain diameter is 2.36mm, and other indexes meet the technical standard of building sand (GB/T14684-2001).
The coarse aggregate used by the bearing layer mixture is granite macadam produced in Mozhuchi county of Lasa city, Tibet autonomous region, the particle size is 2.36-9.5mm, and the quality technical index meets the requirements of road macadam in road asphalt pavement construction technical Specification (JTG F40-2004).
The cement used in the bearing layer mixture is PO42.5 ordinary portland cement produced by a Lasateng cement plant, the 28-day compressive strength is 44.6Mpa, and other indexes meet the requirements of general portland cement (GB 175-2007).
The admixture used in the bearing layer mixture is WT-ZQ50 magnesium sulfate early strength agent produced by Liaoning Wan concrete new material science and technology Limited, and the quality technical index meets the requirement of GB8076-2008 'concrete admixture Standard'.
The mixed water used by the bearing layer mixture meets the drinking water standard.
The white Portland cement used for the wearing layer mixture is PO42.5 cement produced by a Lasateng cement factory, the 28-day compressive strength of the white Portland cement is 45.1Mpa, and other indexes meet the requirements of general Portland cement (GB 175-2007).
The inorganic toner used in the wearing layer mixture is iron oxide red produced by bright chemical industry Co., Ltd, Dongguan, and the maximum particle size of the iron oxide red is 0.3 mm.
The fine river sand used by the wearing layer mixture is river sand produced by Lasa river of Lasa city of autonomous region of Tibet, the fineness modulus is 0.7, and other indexes meet the technical standard of building sand (GB/T14684 plus 2001).
The hydrophobic low-freezing-point filler used for the wearing layer mixture is prepared from calcium chloride, porous volcanic ash and a slow-release agent according to the weight ratio of 40: 58: 2, the maximum particle size of the hydrophobic low freezing point filler is less than 0.6 mm.
The calcium chloride used in the wearing layer mixture is produced by bright chemical industry Co., Ltd, Dongguan.
The porous volcanic ash used for the wearing layer mixture is produced from Henan coke, and the porosity is 61%.
The slow release agent used in the wearing layer mixture is SYHS-8822 type high-density diluent produced by bright chemical industry Co., Ltd, Dongguan, and the relative density is 2.689.
The bearing layer mixture comprises 10 parts of fine aggregate, 67 parts of coarse aggregate, 8 parts of ordinary portland cement, 5 parts of admixture and 10 parts of water by weight, and the total weight is 100 parts.
The test shows that the color self-snow-melting wearing layer mixture comprises, by weight, 5 parts of white portland cement, 5 parts of inorganic toner, 85 parts of fine river sand and 5 parts of hydrophobic low-freezing-point filler, wherein the total amount is 100 parts.
The preparation method of the self-snow-melting red square brick comprises the following steps:
1. weighing 40 parts of calcium chloride, 58 parts of porous volcanic ash and 2 parts of sustained release agent;
2. mixing and grinding the product obtained in the step 1 for 10 minutes by a ball mill, wherein the maximum particle size is less than 0.6 mm;
3. putting the product obtained in the step 2 into a stirrer, adding water with the mass ratio of 20%, and stirring at the speed of 30 revolutions per minute for 8 hours;
4. taking out the product obtained in the step 3, and drying the product in a drying oven at 105 +/-5 ℃;
5. weighing 5 parts of white Portland cement, 5 parts of inorganic toner, 85 parts of fine river sand and 5 parts of the product obtained in the step 4 by weight, adding the total 100 parts of the white Portland cement, the inorganic toner, the fine river sand and the product into a ball mill, mixing and grinding the mixture for 20 minutes, wherein the maximum particle size of the mixture is less than 0.6mm, and obtaining a mixture for the color self-snow-melting wearing layer;
6. weighing 10 parts of fine aggregate, 67 parts of coarse aggregate, 8 parts of ordinary portland cement and 5 parts of admixture by weight, and putting the mixture into a forced stirrer for dry stirring for 50 s;
7. weighing 10 parts of water according to the weight, adding the water into the product obtained in the step 6, and then forcibly stirring for 20s to obtain a mixture for the bearing layer;
8. placing a color square brick mould on a working platform of a hydraulic brick making machine, and uniformly spreading the product obtained in the step 5 into the mould, wherein the spreading thickness is 1.3 times of the forming thickness of the wearing layer;
9. adding the product obtained in the step 7 into the product obtained in the step 8, wherein the adding thickness of the product obtained in the step 7 is 1.35 times of the forming thickness of the bearing layer;
10. starting a hydraulic brick making machine, stopping the brick making machine when the thickness of the color square bricks reaches the designed thickness, and then demoulding the color square bricks;
11. and (3) carrying out constant-temperature and constant-humidity curing on the product obtained in the step (10), wherein the curing temperature is 20 ℃, the curing humidity is 99%, and the curing time is 28d, so as to obtain the color square brick.
The performance indexes of the red square brick prepared by the steps are that the 28-day compressive strength is more than or equal to 21MPa, the 28-day flexural strength is more than or equal to 3.1MPa, the friction coefficient (BPN) is more than or equal to 72, the adhesion between the ice surface and the square brick is 0.13KN at minus 30 ℃, and the adhesion between the ice surface and the square brick is 0.04KN at minus 20 ℃.
Example 2
A self-snow-melting green square brick with a bearing layer thickness of 100mm and a wearing layer thickness of 2mm has the following technical scheme:
the fine aggregate used in the bearing layer mixture is spodumene tailings produced by Chengdu Jie Li industries, and the maximum particle size of the fine aggregate is 2.36 mm.
The coarse aggregate used by the bearing layer mixture is granite macadam produced in Mozhuchi county of Lasa city, Tibet autonomous region, the particle size is 2.36-9.5mm, and the quality technical index meets the requirements of road macadam in road asphalt pavement construction technical Specification (JTG F40-2004).
The cement used in the bearing layer mixture is PC42.5 composite portland cement produced by a Lasateng cement factory, the 28-day compressive strength is 43.9Mpa, and other indexes meet the requirements of general portland cement (GB 175-2007).
The admixture used in the bearing layer mixture is WT-ZQ40 sodium sulfate early strength agent produced by Liaoning Wan concrete new material science and technology Limited, and the quality technical index meets the requirement of GB8076-2008 'concrete admixture Standard'.
The mixed water used by the bearing layer mixture meets the drinking water standard.
The white Portland cement used for the wearing layer mixture is PO42.5 cement produced by a Lasateng cement factory, the 28-day compressive strength of the white Portland cement is 45.1Mpa, and other indexes meet the requirements of general Portland cement (GB 175-2007).
The inorganic toner used in the wearing layer mixture is chromium oxide green produced by bright chemical Co., Ltd, Dongguan, and the maximum particle size of the chromium oxide green is 0.15 mm.
The fine river sand used by the wearing layer mixture is river sand produced by Lasa river of Lasa city of autonomous region of Tibet, the fineness modulus is 1.5, and other indexes meet the technical standard of building sand (GB/T14684 plus 2001).
The hydrophobic low-freezing-point filler used for the wearing layer mixture is prepared from calcium magnesium oxalate, porous volcanic ash and a slow release agent according to the weight ratio of 40: 58: 2, the maximum particle size of the hydrophobic low freezing point filler is less than 0.6 mm.
The calcium magnesium oxalate used for the wearing layer mixture is produced by bright chemical industry Co., Ltd, Dongguan.
The porous volcanic ash used for the wearing layer mixture is produced from Henan coke, and the porosity is 61%.
The slow release agent used in the wearing layer mixture is SYHS-8822 type high-density diluent produced by bright chemical industry Co., Ltd, Dongguan, and the relative density is 2.689.
The bearing layer mixture comprises 40 parts of fine aggregate, 33.5 parts of coarse aggregate, 20 parts of ordinary portland cement, 0.5 part of admixture and 6 parts of water by weight, and the total weight is 100 parts.
The test shows that the color self-snow-melting wearing layer mixture comprises, by weight, 20 parts of white portland cement, 10 parts of inorganic toner, 60 parts of fine river sand and 10 parts of hydrophobic low-freezing-point filler, wherein the total amount is 100 parts.
The preparation method of the self-snow-melting green square brick comprises the following steps:
1. weighing 40 parts of calcium magnesium oxalate, 58 parts of porous volcanic ash and 2 parts of sustained release agent;
2. mixing and grinding the product obtained in the step 1 for 30 minutes by a ball mill, wherein the maximum particle size is 0.15 mm;
3. putting the product obtained in the step 2 into a stirrer, adding water with the mass ratio of 20%, and stirring at the speed of 20 revolutions per minute for 12 hours;
4. taking out the product obtained in the step 3, and drying the product in a drying oven at 105 +/-5 ℃;
5. weighing 20 parts of white portland cement, 10 parts of inorganic toner, 60 parts of fine river sand and 10 parts of the product obtained in the step 4 by weight, adding the total 100 parts of the white portland cement, the inorganic toner, the fine river sand and the product into a ball mill, mixing and grinding the mixture for 30 minutes, wherein the maximum particle size of the mixture is less than 0.6mm, and obtaining a mixture for the color self-snow-melting wearing layer;
6. weighing 40 parts of fine aggregate, 33.5 parts of coarse aggregate, 20 parts of composite portland cement and 0.5 part of admixture by weight, and putting the materials into a forced stirrer for dry stirring for 30 s;
7. weighing 6 parts of water according to the weight, adding the water into the product obtained in the step 6, and then forcibly stirring for 40s to obtain a mixture for the bearing layer;
8. placing a color square brick mould on a working platform of a hydraulic brick making machine, and uniformly spreading the product obtained in the step 5 into the mould, wherein the spreading thickness is 1.5 times of the forming thickness of the wearing layer;
9. adding the product obtained in the step 7 into the product obtained in the step 8, wherein the adding thickness of the product obtained in the step 7 is 1.35 times of the forming thickness of the bearing layer;
10. starting a hydraulic brick making machine, stopping the brick making machine when the thickness of the color square bricks reaches the designed thickness, and then demoulding the color square bricks;
11. and (3) carrying out constant-temperature and constant-humidity curing on the product obtained in the step (10), wherein the curing temperature is 20 ℃, the curing humidity is 96 percent, and the curing time is 28d, so as to obtain the color square brick.
The performance indexes of the red square brick prepared by the steps are that the 28-day compressive strength is more than or equal to 25.3Mpa, the 28-day flexural strength is more than or equal to 3.4Mpa, the friction coefficient (BPN) is more than or equal to 69, the adhesion between the ice surface and the square brick is 0.08KN at minus 30 ℃, and the adhesion between the ice surface and the square brick is 0.01KN at minus 20 ℃.
Example 3
A self-snow-melting red square brick with a bearing layer thickness of 80mm and a wearing layer thickness of 1mm has the following technical scheme:
the fine aggregate used in the bearing layer mixture adopts spodumene tailings produced by Chengdu Jie Li industries limited company and river sand produced by Lasa river of Lasa city of autonomous region of Tibet, and the weight ratio is 50: 50 the resulting product was mixed and had a maximum particle size of 2.36 mm.
The coarse aggregate used by the bearing layer mixture is granite macadam produced in Mozhuchi county of Lasa city, Tibet autonomous region, the particle size is 2.36-9.5mm, and the quality technical index meets the requirements of road macadam in road asphalt pavement construction technical Specification (JTG F40-2004).
The cement used in the bearing layer mixture is pozzolanic portland cement produced by a Lasateng cement plant, the 28-day compressive strength is 45.5Mpa, and other indexes meet the requirements of general portland cement (GB 175-2007).
The admixture used in the bearing layer mixture is WT-ZQ40 sodium sulfate early strength agent produced by Liaoning Wan concrete new material science and technology Limited, and the quality technical index meets the requirement of GB8076-2008 'concrete admixture Standard'.
The mixed water used by the bearing layer mixture meets the drinking water standard.
The white Portland cement used for the wearing layer mixture is PO42.5 cement produced by a Lasateng cement factory, the 28-day compressive strength of the white Portland cement is 45.1Mpa, and other indexes meet the requirements of general Portland cement (GB 175-2007).
The inorganic toner used in the wearing layer mixture is iron oxide yellow produced by bright chemical industry Co., Ltd, Dongguan, and the maximum particle size of the iron oxide yellow is 0.15 mm.
The fine river sand used by the wearing layer mixture is river sand produced by Lasa river of Lasa city of autonomous region of Tibet, the fineness modulus is 1.2, and other indexes meet the technical standard of building sand (GB/T14684 plus 2001).
The hydrophobic low-freezing-point filler used for the wearing layer mixture is prepared from calcium chloride dihydrate, porous volcanic ash and a slow-release agent according to the weight ratio of 40: 58: 2, the maximum particle size of the hydrophobic low freezing point filler is less than 0.6 mm.
The calcium magnesium oxalate used for the wearing layer mixture is produced by bright chemical industry Co., Ltd, Dongguan.
The porous volcanic ash used for the wearing layer mixture is produced from Henan coke, and the porosity is 61%.
The slow release agent used in the wearing layer mixture is SYHS-8822 type high-density diluent produced by bright chemical industry Co., Ltd, Dongguan, and the relative density is 2.689.
The bearing layer mixture comprises 12 parts of fine aggregate, 70 parts of coarse aggregate, 10 parts of ordinary portland cement, 1 part of admixture and 7 parts of water by weight, and the total weight is 100 parts.
The test shows that the color self-snow-melting wearing layer mixture comprises, by weight, 15 parts of white portland cement, 5 parts of inorganic toner, 73 parts of fine river sand and 7 parts of hydrophobic low-freezing-point filler, wherein the total amount is 100 parts.
The preparation method of the self-snow-melting yellow square brick comprises the following steps:
1. weighing 40 parts of calcium chloride dihydrate, 58 parts of porous volcanic ash and 2 parts of sustained release agent;
2. mixing and grinding the product obtained in the step 1 for 25 minutes by a ball mill, wherein the maximum particle size is 0.3 mm;
3. putting the product obtained in the step 2 into a stirrer, adding water with the mass ratio of 20%, and stirring at the speed of 26 revolutions per minute for 10 hours;
4. taking out the product obtained in the step 3, and drying the product in a drying oven at 105 +/-5 ℃;
5. weighing 15 parts of white Portland cement, 5 parts of inorganic toner, 73 parts of fine river sand and 7 parts of the product obtained in the step 4 by weight, adding the total 100 parts of the white Portland cement, the inorganic toner, the fine river sand and the product into a ball mill, mixing and grinding the mixture for 24 minutes, wherein the maximum particle size of the mixture is less than 0.6mm, and obtaining a mixture for the color self-snow-melting wearing layer;
6. weighing 12 parts of fine aggregate, 70 parts of coarse aggregate, 10 parts of pozzolanic portland cement and 1 part of admixture by weight, and putting the mixture into a forced stirrer for dry stirring for 40 s;
7. weighing 6 parts of water according to the weight, adding the water into the product obtained in the step 6, and then forcibly stirring for 32s to obtain a mixture for the bearing layer;
8. placing a color square brick mould on a working platform of a hydraulic brick making machine, and uniformly spreading the product obtained in the step 5 into the mould, wherein the spreading thickness is 1.4 times of the forming thickness of the wearing layer;
9. adding the product obtained in the step 7 into the product obtained in the step 8, wherein the adding thickness of the product obtained in the step 7 is 1.3 times of the forming thickness of the bearing layer;
10. starting a hydraulic brick making machine, stopping the brick making machine when the thickness of the color square bricks reaches the designed thickness, and then demoulding the color square bricks;
11. and (3) carrying out constant-temperature and constant-humidity curing on the product obtained in the step (10), wherein the curing temperature is 20 ℃, the curing humidity is 99%, and the curing time is 28d, so as to obtain the color square brick.
The performance indexes of the red square brick prepared by the steps are that the 28-day compressive strength is more than or equal to 20.6Mpa, the 28-day flexural strength is more than or equal to 3.2Mpa, the adhesion force between the ice surface and the square brick is 0.13KN at the friction coefficient (BPN) of more than or equal to 75 and at-30 ℃, and the adhesion force between the ice surface and the square brick is 0.03KN at-20 ℃.
The above examples of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that many more modifications and variations can be made in the above-described embodiments without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides a from snow melt colored square brick which characterized in that: from bottom to top include in proper order: a bearing layer with the thickness of 50-100mm and a colorful self-snow-melting wearing layer with the thickness of 0.5-2 mm;
the bearing layer comprises 10-40 parts of fine aggregate, 20-70 parts of coarse aggregate, 8-20 parts of cement, 0.5-5 parts of admixture and 4-10 parts of water by weight, and the total weight is 100 parts;
the color self-snow-melting wearing layer comprises, by weight, 5-20 parts of white portland cement, 5-15 parts of inorganic toner, 60-85 parts of fine river sand and 5-10 parts of hydrophobic low-freezing-point filler, wherein the total amount is 100 parts.
2. A hydrophobic low freeze point filler according to claim 1 wherein: the hydrophobic low-freezing-point filler is prepared from one of calcium chloride, calcium acetate, calcium magnesium oxalate and calcium chloride dihydrate, porous volcanic ash and a slow-release agent in a weight ratio of 40: 58: 2, the maximum particle size of the hydrophobic low freezing point filler is less than 0.6 mm;
the porosity of the porous volcanic ash is not less than 50%.
3. The method for preparing a self-snow-melting colored square brick according to claim 1, characterized by comprising the following steps:
(1) weighing 40 parts by weight of one of calcium chloride, calcium acetate, calcium magnesium oxalate and calcium chloride dihydrate, weighing 58 parts by weight of porous volcanic ash, and weighing 2 parts by weight of sustained-release agent;
(2) mixing and grinding the product obtained in the step (1) for 10-30 minutes by a ball mill until the maximum particle size is less than 0.6 mm;
(3) putting the product obtained in the step (2) into a stirrer, adding water with the mass ratio of 20%, and stirring at the speed of 20-30 revolutions per minute for 8-12 hours;
(4) taking out the product obtained in the step (3) and drying the product in an oven at 105 +/-5 ℃;
(5) weighing 5-20 parts of white portland cement, 5-15 parts of inorganic toner, 60-85 parts of fine river sand and 5-10 parts of the product obtained in the step (4) by weight, adding the total 100 parts of the product into a ball mill, mixing and grinding the mixture for 20-30 minutes until the maximum particle size is less than 0.6mm, and stopping grinding to obtain a mixture for the color self-snow-melting wearing layer;
(6) weighing 10-40 parts of fine aggregate, 20-70 parts of coarse aggregate, 8-20 parts of cement and 0.5-5 parts of admixture by weight, and putting the mixture into a forced stirrer for dry mixing for 30-50 s;
(7) weighing 4-10 parts of water according to the weight, adding the water into the product obtained in the step (6), and then forcibly stirring for 20-40s to obtain a mixture for the bearing layer;
(8) placing a color square brick mould on a working platform of a hydraulic brick making machine, and uniformly spreading the product obtained in the step (5) into the mould, wherein the spreading thickness is 1.3-1.5 times of the forming thickness of the wearing layer;
(9) adding the product obtained in the step (7) into the product obtained in the step (8), wherein the adding thickness of the product obtained in the step (7) is 1.25-1.35 times of the forming thickness of the bearing layer;
(10) starting a hydraulic brick making machine, stopping the brick making machine when the thickness of the color square bricks reaches the designed thickness, and then demoulding the color square bricks;
(11) and (3) carrying out constant-temperature and constant-humidity curing on the product obtained in the step (10), wherein the curing temperature is 20 ℃, the curing humidity is more than 95%, and the curing time is not less than 28d, so that the color square brick is obtained.
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| CN1435393A (en) * | 2002-02-01 | 2003-08-13 | 张日红 | Color brick for walk, and method for making same |
| JP2004243748A (en) * | 2003-02-14 | 2004-09-02 | Mitsuru Osako | Production method for building material with surface layer integrated inside layer |
| CN103387817A (en) * | 2013-07-02 | 2013-11-13 | 长安大学 | Environment-friendly salt for ice and snow melting and preparation method thereof |
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