CN109650831A - A kind of high intensity permeable pavement brick and preparation method thereof - Google Patents
A kind of high intensity permeable pavement brick and preparation method thereof Download PDFInfo
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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
- C04B28/14—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 calcium sulfate 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to water-permeable brick technical fields, especially a kind of high-intensitive permeable pavement brick and preparation method thereof, use waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organosilicon, water-reducing agent, modified additive, water for raw material, it is adjusted by the proportion to raw material, so that the mechanical property of product is improved, which has the characteristics that high intensity, high water-permeability, low cost, service life are long and wear-resisting.
Description
Technical field
The present invention relates to water-permeable brick technical field, especially a kind of high-intensitive permeable pavement brick and preparation method thereof.
Background technique
Building waste, which refers to, builds all kinds of buildings, structures, official website etc. in construction, unit in charge of construction or individual
If, be laid with, remove or reparative processes in be generation dregs, spoir, rejected material, timber, packaging material and other wastes,
In, brickbat, concrete, mortar, packaging material account for about the 80% of total amount；If these wastes cannot be handled in time, it is easy to lead
Soil, water body and air pollution are caused, the health of human body is jeopardized；With the continuous quickening of China's urbanization degree, rubbish is built
Rubbish output continues to increase, and accounts for the 30-40% of municipal refuse, and most of rubbish is just transported to suburbs and reveals without any processing
It is stacked or simple landfill, stock building rubbish have reached more than 200 hundred million tons, and the resource utilization rate in China is less than 10% at present,
Well below European Union 90% and Japan and Korea S 95%, construction refuse resource utilizes the coordinated development concerning urban ecological environment, China
The comprehensive utilization of building waste is very urgent.
Waste and old concrete block occupies larger specific gravity in building castoff, can be made into different performance brick according to demand, realizes money
The recycling in source reduces the pollution to environment, reduces the cost of brickmaking, meet the strategy of sustainable development in China, currently, about
Have much using the report that waste and old concrete block prepares multifunctional brick, as patent CN201810610868.1 discloses waste and old coagulation
Soil, gangue, haydite, rubble, quartz sand, red mud, calcined kaolin, cement, modified wheat shell, composite fibre and water-reducing agent are pressed
It is prepared according to certain proportion, but the permeable pavement brick intensity of its preparation is undesirable, water permeability is not excellent enough, and cement is used
It measures also larger.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of high-intensitive porous pavements
Brick, the raw material including following parts by weight: 25-35 parts of waste and old concrete block, 15-25 parts of land plaster, 5-10 parts of river sand, silicate cement
10-15 parts of mud, 5-10 parts of sepiolite, 0.1-0.5 parts of polycarboxylic acids, 0.1-0.5 parts of organosilicon, 1-2 parts of water-reducing agent, modified additive
5-10 parts, 10-20 parts of water.
Preferably, raw material is in parts by weight are as follows: 30 parts of waste and old concrete block, 20 parts of land plaster, 8 parts of river sand, silicate cement
14 parts of mud, 8 parts of sepiolite, 0.2 part of polycarboxylic acids, 0.3 part of organosilicon, 1.4 parts of water-reducing agent, 8 parts of modified additive, 14 parts of water.
The modified additive mixes for cornstarch and wheat shell powder according to equal mass ratioes.
The cornstarch is through vacuum high-temperature calcination processing, and calcination temperature is 180-220 DEG C, calcination time 4-6h.
The wheat shell powder passes through under type such as and handles:
(1) wheat shell powder is sent into agitator tank, NaOH solution is added and impregnates 45-60min, is then heated to 75-85 DEG C
And 2-3h is stirred, moisture will be filtered out after particle suspension liquid cooling, and be washed with deionized 2-3 times, then in 65-75 DEG C of condition
Lower drying water content < 1% into wheat shell, must pre-process wheat shell powder；
(2) pretreatment wheat shell powder is sent into another agitator tank, copper ethanolamine solutions is then added, at normal temperatures and pressures
2-3h is stirred, later filters wheat shell powder, is dried under the conditions of 65-75 DEG C to moisture content < 1%.
It is a further object to provide the preparation methods of the high intensity permeable pavement brick, comprising the following steps:
(1) waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organic is measured according to formula
Silicon, water-reducing agent, modified additive, water, it is spare；
(2) after mixing waste and old concrete block, sepiolite, it is ground into partial size≤1mm particle；
(3) portland cement, polycarboxylic acids and organosilicon are put into blender, the 15- of water quality in formula ratio is added
25%, stir process 3-5min, then step (2) particle, land plaster, river sand, water-reducing agent, modified additive are added into blender
With remaining water, stir process 1-3min；
(4) step (3) product is put into punch forming in mold and adobe, pressure 2-3MPa is made；
(5) adobe is put into temperature is 35-45 DEG C, and humidity conserves 7-9d under conditions of being 80-90%.
Step (3) the first time mixing speed is 150-200r/min, and second of mixing speed is 200-250r/min.
Beneficial effect
1. the present invention can effectively reduce the preparation cost of water-permeable brick using waste and old concrete block as recycled aggregate,
Realize the recycling of resource, the natural aggregate of alternative a part reduces the exploitation to natural resources and even wastes, simultaneously also
Solve the problems, such as waste and old concrete environmental pollution.
2. the present invention is by being added cornstarch and wheat shell powder, especially by cornstarch and the progress of wheat shell powder
After specially treated, so that the gap structure of cornstarch and wheat shell powder changes, it can increase viscous in permeable brick structure
Relay, while its water permeability can also be significantly improved, especially the present invention is by research cornstarch and wheat shell powder to permeable
The intensity of brick and permeable Journal of Sex Research, the intensity and water penetration of water-permeable brick can be significantly improved by individually adding one of ingredient, and
When using two kinds of ingredients simultaneously, there is mutual promoting action, intensity improves, and water permeability is promoted obvious.
3. the present invention using waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organosilicon,
Water-reducing agent, modified additive, water are raw material, are adjusted by the proportion to raw material, so that the mechanical property of product is improved,
Compression strength reaches at least 70MPa or more, and flexural strength reaches at least 20MPa or more；And the dosage of cement is reduced, is reduced
Cost.
4. water-permeable brick of the present invention has the characteristics that high intensity, high water-permeability, low cost, service life are long and wear-resisting.
The water-permeable brick of the present invention program preparation and the water-permeable brick each 100 of patent CN201810610868.1 preparation are selected respectively
Block measures its compression strength, flexural strength, water absorption rate, wear resistance, water-retaining property, coefficient of permeability respectively, and it is as follows that results are averaged
Table 1:
Table 1
As it can be seen that the intensity of water-permeable brick of the present invention is compared with better than the standby water-permeable brick of comparison patent system, and coefficient of permeability reaches
4.61mm/s beyond comparison patent 2.48mm/s, therefore has good water permeability.
Specific embodiment
Tuberculosis specific embodiment is limited technical solution of the present invention is further below, but claimed
Range is not only limited to made description.
Embodiment 1
A kind of high intensity permeable pavement brick, the raw material including following parts by weight: waste and old concrete block 25kg, land plaster
15kg, river sand 5kg, portland cement 10kg, sepiolite 5kg, polycarboxylic acids 0.1kg, organosilicon 0.1kg, water-reducing agent 1kg, modification
Additive 5kg, water 10kg.
The modified additive mixes for cornstarch and wheat shell powder according to equal mass ratioes.
The preparation method of above-mentioned high intensity permeable pavement brick, comprising the following steps:
(1) waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organic is measured according to formula
Silicon, water-reducing agent, modified additive, water, it is spare；
(2) after mixing waste and old concrete block, sepiolite, it is ground into partial size≤1mm particle；
(3) by step (2) particle, land plaster, river sand, portland cement, polycarboxylic acids, organosilicon, water-reducing agent, modified addition
Agent and water, which are put into blender, stirs 3min；
(4) step (3) product is put into punch forming in mold and adobe, pressure 2MPa is made；
(5) adobe is put into temperature is 35 DEG C, and humidity conserves 7d under conditions of being 80%.
Step (3) the first time mixing speed is 150r/min, and second of mixing speed is 200r/min.
It measures water-permeable brick prepared by embodiment 1 and amounts to 100 pieces, results are averaged, compression strength 70.6MPa, resistance to compression
Intensity 21.3MPa, water absorption rate 5.9%, wear resistance 1.61, water-retaining property 0.79g/cm3, coefficient of permeability 3.92mm/s.
Embodiment 2
A kind of high intensity permeable pavement brick, the raw material including following parts by weight: waste and old concrete block 35kg, land plaster
25kg, river sand 10kg, portland cement 15kg, sepiolite 10kg, polycarboxylic acids 0.5kg, organosilicon 0.5kg, water-reducing agent 2kg, change
Property additive 10kg, water 20kg.
The modified additive mixes for cornstarch and wheat shell powder according to equal mass ratioes.
The cornstarch is through vacuum high-temperature calcination processing, and calcination temperature is 220 DEG C, calcination time 6h.
The wheat shell powder passes through under type such as and handles:
(1) wheat shell powder is sent into agitator tank, NaOH solution is added and impregnates 45min, is then heated to 75 DEG C and stirs
2h will filter out moisture after particle suspension liquid cooling, and be washed with deionized 2 times, then dry under the conditions of 65 DEG C to wheat
Water content < 1% in shell must pre-process wheat shell powder；
(2) pretreatment wheat shell powder is sent into another agitator tank, copper ethanolamine solutions is then added, at normal temperatures and pressures
2h is stirred, later filters wheat shell powder, is dried under the conditions of 65 DEG C to moisture content < 1%.
The preparation method of above-mentioned high intensity permeable pavement brick, comprising the following steps:
(1) waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organic is measured according to formula
Silicon, water-reducing agent, modified additive, water, it is spare；
(2) after mixing waste and old concrete block, sepiolite, it is ground into partial size≤1mm particle；
(3) by step (2) particle, land plaster, river sand, portland cement, polycarboxylic acids, organosilicon, water-reducing agent, modified addition
Agent and water, which are put into blender, stirs 5min；
(4) step (3) product is put into punch forming in mold and adobe, pressure 3MPa is made；
(5) adobe is put into temperature is 45 DEG C, and humidity conserves 7-9d under conditions of being 90%.
Step (3) the first time mixing speed is 200r/min, and second of mixing speed is 250r/min.
It measures water-permeable brick prepared by embodiment 2 and amounts to 100 pieces, results are averaged, compression strength 71.4MPa, resistance to compression
Intensity 22.9MPa, water absorption rate 6.1%, wear resistance 1.57, water-retaining property 0.81g/cm3, coefficient of permeability 4.37mm/s.
Embodiment 3
A kind of high intensity permeable pavement brick, the raw material including following parts by weight: waste and old concrete block 25kg, land plaster
25kg, river sand 5kg, portland cement 15kg, sepiolite 10kg, polycarboxylic acids 0.1kg, organosilicon 0.5kg, water-reducing agent 1kg, modification
Additive 5kg, water 20kg.
The modified additive mixes for cornstarch and wheat shell powder according to equal mass ratioes.
The cornstarch is through vacuum high-temperature calcination processing, and calcination temperature is 200 DEG C, calcination time 5h.
The wheat shell powder passes through under type such as and handles:
(1) wheat shell powder is sent into agitator tank, NaOH solution is added and impregnates 60min, is then heated to 85 DEG C and stirs
3h will filter out moisture after particle suspension liquid cooling, and be washed with deionized 3 times, then dry under the conditions of 75 DEG C to wheat
Water content < 1% in shell must pre-process wheat shell powder；
(2) pretreatment wheat shell powder is sent into another agitator tank, copper ethanolamine solutions is then added, at normal temperatures and pressures
3h is stirred, later filters wheat shell powder, is dried under the conditions of 75 DEG C to moisture content < 1%.
The preparation method of above-mentioned high intensity permeable pavement brick, comprising the following steps:
(1) waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organic is measured according to formula
Silicon, water-reducing agent, modified additive, water, it is spare；
(2) after mixing waste and old concrete block, sepiolite, it is ground into partial size≤1mm particle；
(3) portland cement, polycarboxylic acids and organosilicon are put into blender, 15% of water quality in formula ratio are added,
Stir process 3min, then step (2) particle, land plaster, river sand, water-reducing agent, modified additive and residue are added into blender
Water, stir process 1min；
(4) step (3) product is put into punch forming in mold and adobe, pressure 2.2MPa is made；
(5) adobe is put into temperature is 38 DEG C, and humidity conserves 7d under conditions of being 85%.
Step (3) the first time mixing speed is 180r/min, and second of mixing speed is 220r/min.
It measures water-permeable brick prepared by embodiment 3 and amounts to 100 pieces, results are averaged, compression strength 72.8MPa, resistance to compression
Intensity 21.5MPa, water absorption rate 6.1%, wear resistance 1.59, water-retaining property 0.82g/cm3, coefficient of permeability 4.63mm/s.
Embodiment 4
A kind of high intensity permeable pavement brick, the raw material including following parts by weight: waste and old concrete block 30kg, land plaster
20kg, river sand 8kg, portland cement 14kg, sepiolite 8kg, polycarboxylic acids 0.2kg, organosilicon 0.3kg, water-reducing agent 1.4kg, change
Property additive 8kg, water 14kg.
The modified additive mixes for cornstarch and wheat shell powder according to equal mass ratioes.
The cornstarch is through vacuum high-temperature calcination processing, and calcination temperature is 200 DEG C, calcination time 6h.
The wheat shell powder passes through under type such as and handles:
(1) wheat shell powder is sent into agitator tank, NaOH solution is added and impregnates 60min, is then heated to 80 DEG C and stirs
2.5h will filter out moisture after particle suspension liquid cooling, and be washed with deionized 3 times, then dry under the conditions of 68 DEG C to small
Water content < 1% in wheat husk must pre-process wheat shell powder；
(2) pretreatment wheat shell powder is sent into another agitator tank, copper ethanolamine solutions is then added, at normal temperatures and pressures
2.5h is stirred, later filters wheat shell powder, is dried under the conditions of 72 DEG C to moisture content < 1%.
The preparation method of above-mentioned high intensity permeable pavement brick, comprising the following steps:
(1) waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organic is measured according to formula
Silicon, water-reducing agent, modified additive, water, it is spare；
(2) after mixing waste and old concrete block, sepiolite, it is ground into partial size≤1mm particle；
(3) portland cement, polycarboxylic acids and organosilicon are put into blender, 25% of water quality in formula ratio are added,
Stir process 5min, then step (2) particle, land plaster, river sand, water-reducing agent, modified additive and residue are added into blender
Water, stir process 3min；
(4) step (3) product is put into punch forming in mold and adobe, pressure 2.5MPa is made；
(5) adobe is put into temperature is 42 DEG C, and humidity conserves 8d under conditions of being 90%.
Step (3) the first time mixing speed is 200r/min, and second of mixing speed is 200r/min.
It measures water-permeable brick prepared by embodiment 4 and amounts to 100 pieces, results are averaged, compression strength 73.6MPa, resistance to compression
Intensity 23.7MPa, water absorption rate 6.2%, wear resistance 1.63, water-retaining property 0.85g/cm3, coefficient of permeability 4.65mm/s.
Test example 1
By adding modified wheat shell in the feed in patent CN201810610868.1, due to modified wheat shell
With porous structure, can be improved the bonding force between product structure, improve the water penetration of product, be based on this, the present invention by
A certain amount of calcining cornstarch is added in modified wheat shell, and passes through long-term test and research, discovery addition calcining is beautiful
It is very significant to the water permeability improvement of water-permeable brick after rice starch and modified wheat shell powder, and based on 4 scheme of embodiment,
Only addition modified wheat shell or calcining cornstarch in modifying agent respectively, test result is as follows table 2:
Table 2
| Group | Coefficient of permeability mm/s |
| Modified wheat shell | 2.68 |
| Calcine cornstarch | 2.73 |
| Modified wheat shell+calcining cornstarch | 4.65 |
It is important to point out that, above embodiments and test example are only limitted to do further technical solution of the present invention herein
Elaboration and understanding, should not be understood as it is further to technical solution of the present invention limited, what those skilled in the art made
The innovation and creation of non-protruding essential characteristics and marked improvement still fall within protection category of the invention.
Claims (7)
1. a kind of high intensity permeable pavement brick, which is characterized in that the raw material including following parts by weight: waste and old concrete block 25-35
Part, 0.1-0.5 parts of polycarboxylic acids, has 15-25 parts of land plaster, 5-10 parts of river sand, 10-15 parts of portland cement, 5-10 parts of sepiolite
0.1-0.5 parts of machine silicon, 1-2 parts of water-reducing agent, 5-10 parts of modified additive, 10-20 parts of water.
2. high intensity permeable pavement brick as described in claim 1, which is characterized in that the raw material is in parts by weight are as follows: waste and old mixed
Solidifying 30 parts of soil block, 20 parts of land plaster, 8 parts of river sand, 14 parts of portland cement, 8 parts of sepiolite, 0.2 part of polycarboxylic acids, organosilicon 0.3
Part, 1.4 parts of water-reducing agent, 8 parts of modified additive, 14 parts of water.
3. high intensity permeable pavement brick as described in claim 1, which is characterized in that the modified additive is cornstarch and small
Wheat husk powder is mixed according to equal mass ratioes.
4. as claimed in claim 3 high intensity permeable pavement brick, which is characterized in that the cornstarch through vacuum high-temperature calcining at
Reason, calcination temperature are 180-220 DEG C, calcination time 4-6h.
5. high intensity permeable pavement brick as claimed in claim 3, which is characterized in that the wheat shell powder passes through as under type
Reason:
(1) wheat shell powder is sent into agitator tank, NaOH solution is added and impregnates 45-60min, is then heated to 75-85 DEG C and stirs
2-3h is mixed, moisture will be filtered out after particle suspension liquid cooling, and be washed with deionized 2-3 times, then done under the conditions of 65-75 DEG C
Dry water content < 1% into wheat shell, must pre-process wheat shell powder；
(2) pretreatment wheat shell powder is sent into another agitator tank, copper ethanolamine solutions is then added, stir at normal temperatures and pressures
2-3h later filters wheat shell powder, dries under the conditions of 65-75 DEG C to moisture content < 1%.
6. the preparation method of high intensity permeable pavement brick as claimed in claim 1 or 2, which comprises the following steps:
(1) according to formula measure waste and old concrete block, land plaster, river sand, portland cement, sepiolite, polycarboxylic acids, organosilicon,
Water-reducing agent, modified additive, water, it is spare；
(2) after mixing waste and old concrete block, sepiolite, it is ground into partial size≤1mm particle；
(3) portland cement, polycarboxylic acids and organosilicon are put into blender, the 15-25% of water quality in formula ratio is added, stirs
Processing 3-5min is mixed, then step (2) particle, land plaster, river sand, water-reducing agent, modified additive and residue are added into blender
Water, stir process 1-3min；
(4) step (3) product is put into punch forming in mold and adobe, pressure 2-3MPa is made；
(5) adobe is put into temperature is 35-45 DEG C, and humidity conserves 7-9d under conditions of being 80-90%.
7. the preparation method of high intensity permeable pavement brick as claimed in claim 6, which is characterized in that the step (3) is for the first time
Mixing speed is 150-200r/min, and second of mixing speed is 200-250r/min.
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Application publication date: 20190419 |