CN106904903A - A kind of gradient type porous concrete product and preparation method thereof - Google Patents
A kind of gradient type porous concrete product and preparation method thereof Download PDFInfo
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- CN106904903A CN106904903A CN201710031962.7A CN201710031962A CN106904903A CN 106904903 A CN106904903 A CN 106904903A CN 201710031962 A CN201710031962 A CN 201710031962A CN 106904903 A CN106904903 A CN 106904903A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
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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
- 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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
- C04B18/025—Grog
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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
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0038—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter
- C04B38/0041—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter the particulate matter having preselected particle sizes
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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
-
- 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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- Engineering & Computer Science (AREA)
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Abstract
The present invention provides a kind of gradient type porous concrete product and preparation method thereof, and the raw material of porous concrete product include that the weight ratio of composite aggregate, Binder Materials, compound additive and water is 2.5~3.5:1:0.003~0.03:0.25~0.35, composite aggregate is made up of regeneration aggregate and lightweight aggregate.Porous concrete product prepared by the present invention has the water penetration of different gradients, permeability rate variation, and prepared porous concrete product stable performance, the easy vibration compacting in preparation process.The 28d compression strength of porous concrete product prepared by the present invention is 10~20MPa, permeability rate is 0.5~10mm/s.And construction technology can be simplified using gradient type porous concrete product of the invention, engineering construction can disposably be completed according to actual requirement of engineering, and can obtain and identical technique effect of constructing several times in the prior art.
Description
Technical field
The present invention relates to technical field of concrete, and in particular to a kind of gradient type porous concrete product and its preparation side
Method.
Background technology
With the development of concrete technology, maintaining ecological balance and realize that sustainable development is also chasing after for building material field
Seek target.Porous concrete product can also claim draining concrete also known as celluar concrete.As environmentally friendly, the ecotypic road of one kind
Pipeline material, with water penetration, can comparatively fast eliminate road, square ponding, mitigate municipal drainage burden；Rainwater can be made to rapidly permeate into ground
Under, recharge of groundwater keeps soil moisture, safeguards the ecological balance of underground water and soil；Connect in terms of heat absorption and heat storage function
The ground that natural vegetation is covered is bordering on, the temperature and humidity of city space is adjusted, alleviates urban heat land effect；Make with sound-absorbing
With ambient noise can be reduced；Space can adsorb urban pollutant (such as dust), reduce dust pollution；Possess serial color scheme,
Can be needed to be designed pattern according to surrounding environment, be that tradition mats formation can not with general water-permeable brick with stronger dicoration
The special pavement material realized.In a word, porous concrete product is a kind of conservation of nature, maintaining ecological balance, alleviates Urban Thermal
The excellent new technology of island effect, is conducive to the benign development of living environment.
Because porous concrete product technology develops also immature, porous concrete product product presence of the prior art
Permeability rate is single, vibrating is difficult the defects such as closely knit, properties of product are differed greatly, construction quality warranty issues are protruded, and has a strong impact on
The popularization and application of the porous concrete product technology.Furthermore, when in the prior art for making pervious concrete pavement, it is necessary to
(in order to obtain the road surface of different permeability rates), i.e., first in the concrete that bottom one layer of permeability rate of construction is larger, this is mixed for construction twice
The particle diameter of solidifying soil aggregate is also correspondingly larger；Again in one layer of less concrete of permeability rate of upper surface construction, this concrete is corresponding
Aggregate size is also smaller；Such arrangement and method for construction needs to construct at twice, therefore its operating efficiency is low, construction technology is cumbersome, engineering is entered
Degree relatively slow, high cost.Additionally, with the transformation of urban construction, generating a large amount of construction waste concrete rubbish, how effectively to locate
It is also the environmental problem that urgently we solve to manage the construction waste concrete rubbish.If can be carried out to these discarded building wastes
Regeneration, it is not only cost-effective, reduce building waste and clear and processing cost, can also mitigate the pollution to environment.
Accordingly, it is desirable to provide a kind of improved technology scheme not enough for above-mentioned prior art.
The content of the invention
The purpose of the present invention is to overcome above-mentioned prior art porous concrete product to have that permeability rate is single, vibrate that it is close to be difficult
The real, defect such as properties of product differ greatly, construction quality warranty issues are prominent, construction technology is cumbersome and cost is high, proposes a kind of
Gradient type porous concrete product and preparation method thereof.Technical scheme is by the use of construction waste concrete as Regenerated Bone
Material makes permeable concrete, and this is a kind of permeable concrete that natural coarse aggregate is substituted with regeneration aggregate, this ecological
Porous concrete product not only increases the use approach of discarded concrete high added value, reduces natural aggregate exploitation quantity,
Reduce the cost for preparing seepy material；Porous concrete product prepared by the present invention has the water penetration of different gradients, and institute
The porous concrete product stable performance of preparation, the easy vibration compacting in preparation process, and preparation method is simple, easy to operate.
To achieve these goals, the present invention provides following technical scheme：
A kind of gradient type porous concrete product, the raw material of the porous concrete product include composite aggregate, gelling
Material, compound additive and water, and the weight ratio of the composite aggregate, Binder Materials, compound additive and water is 2.5~3.5:
1:0.003~0.03:0.25~0.35.
In gradient type porous concrete product as described above, it is preferable that the composite aggregate is by regeneration aggregate and lightweight aggregate
Composition, and the regeneration aggregate and lightweight aggregate are by volume 1:1 ratio is mixed into the composite aggregate.
In gradient type porous concrete product as described above, it is preferable that the regeneration aggregate adds for construction waste concrete
Particle diameter obtained in work is 5mm~10mm, apparent density not less than 2500kg/m3Simple grain level regeneration aggregate；The lightweight aggregate is
Particle diameter is 3mm~5mm, bulk density is not more than 1000kg/m3Artificial porcelain granule；Preferably, the regeneration aggregate and described light
Aggregate is the aggregate of saturated dry surface；Preferably, the processing of the construction waste concrete includes broken, sieving washing etc.
Treatment.
In gradient type porous concrete product as described above, it is preferable that the production technology of lightweight aggregate includes following steps:
(1) prepared by curing agent, by weight by 35~40 parts of blast furnace granulated slag, 30~45 parts of red mud, 25~35 parts of lime, desulfurated plaster 1~4
After part is well mixed, it is aged 4 hours, dries；(2) the dry material of above-mentioned ageing is carried out into grinding, being screened into fineness is
The curing agent powder of 0.09mm；(3) by weight by 25~35 parts of above-mentioned curing agent powder, 55~75 parts of silt and water 10~14
After part stirring mixing, water spray glomeration, it is placed in still kettle the steam pressure hydration reaction under 1.0~1.2MPa and after 8 hours, is down to room
Temperature is made lightweight aggregate.
In gradient type porous concrete product as described above, it is preferable that the Binder Materials is by portland cement, flyash
Constituted with miberal powder, and the portland cement, the flyash, the miberal powder are 6~8 by weight:1~2:1~2 ratio
It is mixed into the Binder Materials.
In gradient type porous concrete product as described above, it is preferable that the portland cement is 42.5 grades or 52.5 grades
Portland cement；The flyash is the II grades or II grades flyash of ratings above；The miberal powder is S95 or S95 ratings above
Miberal powder.
In gradient type porous concrete product as described above, it is preferable that the compound additive by water reducer, thickener,
Retarder and early strength agent are constituted；And the water reducer, the thickener, the retarder and the early strength agent are 4 by weight
~6:1~3:0.5~3:0.1~0.5 ratio is mixed into the compound additive.
In gradient type porous concrete product as described above, it is preferable that the water reducer is polycarboxylic acids dehydragent, described
Thickener is cellulose thickener, and the retarder is glucose retarder, and the early strength agent is early strong triethanolamine class
Agent；Preferably, the water-reducing rate of the polycarboxylate water-reducer is 20%~40%；The thickener is thickened for carboxymethylcellulose calcium
Agent.
The preparation method of a kind of as above any described gradient type porous concrete product, the preparation method includes following
Step：
1) composite aggregate, Binder Materials, water and compound additive are weighed afterwards according to required proportioning and is added to mixer
In, high-speed stirred is uniform, obtains mixture；
2) by step 1) in the mixture that obtains injection mould, and the mixture height of injection should be higher by mold height；Institute
The bottom surface for stating mould is provided with several piercing holes；
3) by step 2) mould for being loaded with mixture that obtains is placed on and jolt ramming shaping carried out on shake table；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
In preparation method as described above, it is preferable that step 2) in, the piercing hole is circular port, the hole of the circular port
Footpath is 1~2mm, pitch-row is 2~4mm；Preferably, the aperture of the circular port be 1mm, pitch-row be 2mm；More preferably, it is multiple
The circular port is arranged on the bottom surface of the mould in matrix structure.
In preparation method as described above, it is preferable that step 2) in, during slip casting, mixture is highly higher by mold height
10%~20%.
In preparation method as described above, it is preferable that step 3) in, the length of specific jolt ramming time need to combine concrete mixing
The state of thing and specific surface state are determined；After jolt ramming, the mixture of die surface is carried out into floating treatment.Preferably,
The jolt ramming time is 30s.
Compared with immediate prior art, the technical scheme that the present invention is provided has following excellent effect：
1st, the present invention makes permeable concrete by the use of construction waste concrete as regeneration aggregate, and this is one kind to regenerate
Aggregate substitutes the permeable concrete of natural coarse aggregate, and this ecological porous concrete product not only increases discarded concrete
The use approach of high added value, reduces natural aggregate exploitation quantity, reduces the cost for preparing seepy material.Skill of the invention
Art scheme low cost, and discarded concrete can be made to be effectively addressed, environmental problem is solved, with significant economy and environment
Property.
2nd, porous concrete product prepared by the present invention has the water penetration of different gradients, and permeability rate variation as has
There is size fractionated aggregate and in the gradient type porous concrete product of upper and lower double-layer structure (there are two different permeability rates), and
Prepared porous concrete product stable performance, the easy vibration compacting in preparation process.Pervious concrete prepared by the present invention
The 28d compression strength of product is 10~20MPa, permeability rate is 0.5~10mm/s.
3rd, preparation method of the invention is simple, easy to operate；During jolt ramming, lightweight aggregate can be vibrated due to light weight
To upper strata, and regeneration aggregate will be moved down, and have size fractionated aggregate and in the gradient type of upper and lower double-layer structure so as to be formed
Porous concrete product；Furthermore, the part of cement slurry during jolt ramming in mixture will be moved down, but due to the technology of the present invention side
The mould bottom surface that case is used has several piercing holes, so that cement mortar will not be assembled in mould bottom surface, it is to avoid cement mortar
In mould bottom surface, aggregation can influence the permeable effect of entirety of concrete.
4th, in the prior art in making pervious concrete pavement, in order to obtain the road surface of different permeability rates, it is necessary to twice
Or repeatedly construct, construction technology is cumbersome, relatively costly；And can be simplified using gradient type porous concrete product of the invention
Construction technology, disposably completes engineering construction, and can obtain and phase of constructing several times in the prior art according to actual requirement of engineering
Same technique effect.
Brief description of the drawings
Mould structure schematic diagram in Fig. 1 embodiment of the present invention；
In figure：1st, mould；2nd, piercing hole；3rd, leg；4th, side wall；5th, bottom surface.
Specific embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained, belongs to the scope of protection of the invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the application can be mutually combined.
In the description of the invention, term " longitudinal direction ", " transverse direction ", " on ", it is D score, "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom " are, based on orientation shown in the drawings or position relationship, to be only
For the ease of the description present invention rather than requiring that the present invention must be with specific azimuth configuration and operation therefore it is not intended that right
Limitation of the invention.The term " connected " that is used in the present invention, " connection " should be interpreted broadly, for example, it may be fixedly connected,
Can also be detachably connected；Can be joined directly together, it is also possible to be indirectly connected to by intermediate member, it is common for this area
For technical staff, the concrete meaning of above-mentioned term can be as the case may be understood.
As shown in figure 1, the embodiment of the present invention provides a kind of die for preparation 1 of gradient type porous concrete product, mould 1
Including side wall 4, bottom surface 5 and leg 3；Leg 3 is arranged on the bottom of bottom surface 5, and multiple side walls 4 are arranged on the top of bottom surface 5, preferably
Ground, the mould 1 of side wall 4 and bottom surface 5 the composition rectangular shape in the present embodiment is (without top surface, i.e., with the corresponding parallel surface in bottom surface 5 position
It is the inlet of concrete mix to put place).In order that concrete mix is during jolt ramming is molded, the water in mixture
Slurry body will not assemble that (cement mortar is assembled in 1 bottom surface of mould 5 will influence the permeable effect of entirety of concrete in the bottom surface 5 of mould 1
Really), the bottom surface 5 of the mould 1 therefore in the present embodiment is provided with several piercing holes 2, it is to avoid cement slurry is in the bottom surface 5 of mould 1
The defect of the permeable effect of entirety of aggregation influence concrete.Preferably, the piercing hole 2 in mould 1 is circular port, the hole of circular port
Footpath be 1~2mm (for example：1mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm), pitch-row be 2~4mm (for example：2.2mm、
2.3mm、2.8mm、3.0mm、3.5mm、3.8mm)；And multiple circular ports are arranged on the bottom surface 5 of mould 1 in matrix structure
On.The shape of the mould 1 in the present invention, big I are set according to requirement of engineering, and the present invention is no longer limited this.
The embodiment of the present invention provides a kind of gradient type porous concrete product, and the raw material of porous concrete product are included again
Aggregate, Binder Materials, compound additive and water are closed, and the weight ratio of composite aggregate, Binder Materials, compound additive and water is
2.5~3.5 (for example：2.6、2.8、2.9、3.0、3.1、3.2、3.3、3.4):1:0.003~0.03 (for example：0.004、
0.005、0.008、0.010、0.015、0.020、0.025、0.028):0.25~0.35 (for example：0.26、0.27、0.28、
0.29、0.30、0.32、0.33、0.34)。
Gradient type porous concrete product of the invention refer to size fractionated aggregate and in upper and lower double-layer structure so that
Make its upper and lower two-layer that there are different permeability rates, technical scheme can solve the single permeability rate of single concrete product
Problem.In general, the aggregate size of concrete is bigger, and permeability rate is bigger.Porous concrete product tool prepared by the present invention
There are different permeability rates, illustrate herein, the data of permeability rate involved in the present invention are detection porous concrete product upper strata
Structure sheaf where the less lightweight aggregate of permeability rate, i.e. particle diameter.Lower floor's aggregate size of the present invention is bigger than upper strata aggregate size, lower floor
Permeability rate it is bigger than upper strata permeability rate, so as to form the porous concrete product of gradient type.
Composite aggregate is made up of regeneration aggregate and lightweight aggregate in the embodiment of the present invention, and regeneration aggregate and lightweight aggregate press volume
Than being 1:1 ratio is mixed into composite aggregate.It is preferred that, regeneration aggregate is that the obtained particle diameter of construction waste concrete processing is 5mm
~10mm is (for example：6mm, 7mm, 8mm, 9mm), apparent density be not less than 2500kg/m3Simple grain level regeneration aggregate；Lightweight aggregate is
Particle diameter be 3mm~5mm (for example：3.5mm, 4.0mm, 4.2mm, 4.7mm), bulk density be not more than 1000kg/m3Artificial pottery
Grain.Further preferably, regeneration aggregate and lightweight aggregate are the aggregate of saturated dry surface.
Further preferably, regeneration aggregate is discarded concrete particle diameter 5mm~10mm (examples after broken, sieving washing process
Such as：6.5mm, 7.2mm, 8.3mm, 9.4mm) particle.
Further preferably, the production technology of lightweight aggregate includes following steps:(1) prepared by curing agent, by weight by blast furnace
35~40 parts of grain slag is (for example：36 parts, 37 parts, 38 parts, 39 parts), 30~45 parts of red mud (for example：32 parts, 36 parts, 40 parts, 42
Part), 25~35 parts of lime (for example：27 parts, 29 parts, 32 parts, 34 parts), 1~4 part of desulfurated plaster (for example：2 parts, 2.5 parts, 3 parts,
3.5 parts) it is well mixed after, be aged 4 hours, dry；(2) the dry material of above-mentioned ageing is carried out into grinding, being screened into fineness is
The curing agent powder of 0.09mm；(3) by weight by 25~35 parts of above-mentioned curing agent powder (for example：27 parts, 28 parts, 31 parts, 33
Part), 55~75 parts of silt is (for example：57 parts, 60 parts, 65 parts, 70 parts) and 10~14 parts of water is (for example：11 parts, 12 parts, 13 parts,
13.5 parts) stirring mixing, after water spray glomeration, steam pressure hydration reaction is placed in still kettle under 1.0~1.2MPa after 8 hours,
It is down to room temperature and is made lightweight aggregate.
Binder Materials is made up of portland cement, flyash and miberal powder in the embodiment of the present invention, and portland cement, fine coal
Ash, miberal powder are by weight for 6~8 (for example：6.2、6.5、6.7、7.0、7.1、7.4、7.8):1~2 (for example：1.2、1.5、
1.7、1.8、1.9):1~2 (for example：1.1st, 1.3,1.5,1.7,1.8, ratio 1.9) is mixed into Binder Materials.It is preferred that, silicic acid
Salt cement is 42.5 grades or 52.5 grades of portland cements；Flyash is the II grades or II grades flyash of ratings above；Miberal powder is S95
Or the miberal powder of S95 ratings above.
Compound additive is made up of water reducer, thickener, retarder and early strength agent in the embodiment of the present invention；And water reducer,
Thickener, retarder and early strength agent are by weight for 4~6 (for example：4.2、4.5、4.8、5.0、5.2、5.6、5.8、5.9):1~
3 (for example：1.2、1.4、1.7、2.0、2.4、2.7、2.9):0.5~3 (for example：0.6、0.8、0.9、1.2、1.6、1.8、2.0、
2.2、2.5、2.7、2.95):0.1~0.5 (for example：0.15、0.18、0.20、0.25、0.28、0.31、0.34、0.38、0.40、
0.42nd, 0.45,0.46, ratio 0.49) is mixed into compound additive.It is preferred that, water reducer is polycarboxylic acids dehydragent, thickener
It is cellulose thickener, retarder is glucose retarder, and early strength agent is triethanolamine class early strength agent.Further preferably, poly- carboxylic
The water-reducing rate of acids water reducer is 20%~40%.
Wherein, the thickening mechanism of cellulose thickener is that hydrophobic main chain passes through hydrogen bond association with surrounding water molecules, is improved
Polymer fluid volume in itself, reduces the space of Particle free activity, so as to improve system viscosity.Can also pass through
The raising of viscosity is realized in the winding of strand, shows as having high viscosity in static and low sheraing, is under high shear low-viscosity.This
Because during static or low shearing speed, cellulose molecular chain is in disordered state and makes system that high viscosity is presented；And cut in height
When cutting speed is spent, molecule makees ordered arrangement parallel to flow direction, it is easy to mutually slide, so system viscosity declines.It is further excellent
Choosing, cellulose thickener is carboxymethylcellulose calcium.
Embodiment 1
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step：
1) by regeneration aggregate 750kg, lightweight aggregate 500kg, portland cement 300kg, flyash 60kg, miberal powder 60kg are multiple
Additive 12kg is closed, water 110kg is weighed rear and is added in mixer, and high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made up of regeneration aggregate and lightweight aggregate, and regeneration aggregate and lightweight aggregate are by volume 1:1
Ratio is mixed into composite aggregate.Regeneration aggregate is that the obtained particle diameter of construction waste concrete processing is the simple grain level of 5mm~10mm
Regeneration aggregate；Lightweight aggregate is the artificial porcelain granule that particle diameter is 3~5mm.Regeneration aggregate and lightweight aggregate are the bone of saturated dry surface
Material.
Compound additive is made up of water reducer, thickener, retarder and early strength agent；And water reducer, thickener, retarder and
Early strength agent is 5 by weight:2:1:0.4.
2) by step 1) in mixture injection mould in, and injection mixture height should be higher by mold height 10%
(for mixture jolt ramming sinks to preparing, in case the mixture amount in injection mould is few and can not fill whole when jolt ramming is sunk
Mould inside space)；The bottom surface of mould is provided with several piercing holes；Piercing hole is circular port, the aperture of circular port is 1mm,
Pitch-row is 2mm；And multiple circular ports are arranged on the bottom surface of mould in matrix structure；
3) by step 2) in be loaded with the mould of mixture and be placed on jolt ramming shaping is carried out on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, and have size fractionated so as to be formed
Aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, the part of cement during jolt ramming in mixture
Slurry will be moved down, but because mould bottom surface has several piercing holes, so that cement mortar will not be assembled in mould bottom surface；Cement
Starch the permeable effect of entirety that concrete will be influenceed in the aggregation of mould bottom surface；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
5) by step 4) in gradient type porous concrete product conserve to 28d, survey its permeability rate for 3.9mm/s, resist
Compressive Strength is 19.6MPa.
Embodiment 2
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step：
1) by regeneration aggregate 750kg, lightweight aggregate 500kg, portland cement 300kg, flyash 60kg, miberal powder 60kg are multiple
Additive 8.5kg is closed, water 125kg is weighed rear and is added in mixer, and high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made up of regeneration aggregate and lightweight aggregate, and regeneration aggregate and lightweight aggregate are by volume 1:1
Ratio is mixed into composite aggregate.Regeneration aggregate is that the obtained particle diameter of construction waste concrete processing is the simple grain level of 5mm~10mm
Regeneration aggregate；Lightweight aggregate is the artificial porcelain granule that particle diameter is 3~5mm.Regeneration aggregate and lightweight aggregate are the bone of saturated dry surface
Material.
Compound additive is made up of water reducer, thickener, retarder and early strength agent；And water reducer, thickener, retarder and
Early strength agent is 4 by weight:3:3:0.3.
2) by step 1) in mixture injection mould in, and injection mixture height should be higher by mold height 15%
(for mixture jolt ramming sinks to preparing, in case the mixture amount in injection mould is few and can not fill whole when jolt ramming is sunk
Mould inside space)；The bottom surface of mould is provided with several piercing holes；Piercing hole is circular port, and the aperture of circular port is
1.5mm, pitch-row are 2mm；And multiple circular ports are arranged on the bottom surface of mould in matrix structure；
3) by step 2) in be loaded with the mould of mixture and be placed on jolt ramming shaping is carried out on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, and have size fractionated so as to be formed
Aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, the part of cement during jolt ramming in mixture
Slurry will be moved down, but because mould bottom surface has several piercing holes, so that cement mortar will not be assembled in mould bottom surface；Cement
Starch the permeable effect of entirety that concrete will be influenceed in the aggregation of mould bottom surface；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
5) by step 4) in gradient type porous concrete product conserve to 28d, survey its permeability rate for 4.3mm/s, resist
Compressive Strength is 16.1MPa.
Embodiment 3
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step：
1) by regeneration aggregate 750kg, lightweight aggregate 500kg, portland cement 290kg, flyash 45kg, miberal powder 75kg are multiple
Additive 7.5kg is closed, water 130kg is weighed rear and is added in mixer, and high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made up of regeneration aggregate and lightweight aggregate, and regeneration aggregate and lightweight aggregate are by volume 1:1
Ratio is mixed into composite aggregate.Regeneration aggregate is that the obtained particle diameter of construction waste concrete processing is the simple grain level of 5mm~10mm
Regeneration aggregate；Lightweight aggregate is the artificial porcelain granule that particle diameter is 3~5mm.Regeneration aggregate and lightweight aggregate are the bone of saturated dry surface
Material.
Compound additive is made up of water reducer, thickener, retarder and early strength agent；And water reducer, thickener, retarder and
Early strength agent is 6 by weight:1:2:0.5.
2) by step 1) in mixture injection mould in, and injection mixture height should be higher by mold height 20%
(for mixture jolt ramming sinks to preparing, in case the mixture amount in injection mould is few and can not fill whole when jolt ramming is sunk
Mould inside space)；The bottom surface of mould is provided with several piercing holes；Piercing hole is circular port, the aperture of circular port is 2mm,
Pitch-row is 3mm；And multiple circular ports are arranged on the bottom surface of mould in matrix structure；
3) by step 2) in be loaded with the mould of mixture and be placed on jolt ramming shaping is carried out on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, and have size fractionated so as to be formed
Aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, the part of cement during jolt ramming in mixture
Slurry will be moved down, but because mould bottom surface has several piercing holes, so that cement mortar will not be assembled in mould bottom surface；Cement
Starch the permeable effect of entirety that concrete will be influenceed in the aggregation of mould bottom surface；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
5) by step 4) in gradient type porous concrete product conserve to 28d, survey its permeability rate for 5.1mm/s, resist
Compressive Strength is 11.6MPa.
Embodiment 4
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step：
1) by regeneration aggregate 750kg, lightweight aggregate 500kg, portland cement 280kg, flyash 50kg, miberal powder 70kg are multiple
Additive 7.2kg is closed, water 140kg is weighed rear and is added in mixer, and high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made up of regeneration aggregate and lightweight aggregate, and regeneration aggregate and lightweight aggregate are by volume 1:1
Ratio is mixed into composite aggregate.Regeneration aggregate is discarded concrete through the particle after broken, sieving washing process.Lightweight aggregate is grain
The artificial porcelain granule of 3~5mm of footpath.Regeneration aggregate and lightweight aggregate are the aggregate of saturated dry surface.
Compound additive is made up of water reducer, thickener, retarder and early strength agent；And water reducer, thickener, retarder and
Early strength agent is 4.5 by weight:2.5:1.5:0.1.
2) by step 1) in mixture injection mould in, and injection mixture height should be higher by mold height 18%
(for mixture jolt ramming sinks to preparing, in case the mixture amount in injection mould is few and can not fill whole when jolt ramming is sunk
Mould inside space)；The bottom surface of mould is provided with several piercing holes；Piercing hole is circular port, the aperture of circular port is 1mm,
Pitch-row is 3.5mm；And multiple circular ports are arranged on the bottom surface of mould in matrix structure；
3) by step 2) in be loaded with the mould of mixture and be placed on jolt ramming shaping is carried out on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, and have size fractionated so as to be formed
Aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, the part of cement during jolt ramming in mixture
Slurry will be moved down, but because mould bottom surface has several piercing holes, so that cement mortar will not be assembled in mould bottom surface；Cement
Starch the permeable effect of entirety that concrete will be influenceed in the aggregation of mould bottom surface；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
5) by step 4) in gradient type porous concrete product conserve to 28d, survey its permeability rate for 6.5mm/s, resist
Compressive Strength is 10.5MPa.
Embodiment 5
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step：
1) by regeneration aggregate 750kg, lightweight aggregate 500kg, portland cement 240kg, flyash 80kg, miberal powder 80kg are multiple
Additive 6.5kg is closed, water 140kg is weighed rear and is added in mixer, and high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made up of regeneration aggregate and lightweight aggregate, and regeneration aggregate and lightweight aggregate are by volume 1:1
Ratio is mixed into composite aggregate.Regeneration aggregate is discarded concrete through the particle after broken, sieving washing process.Lightweight aggregate is grain
Footpath is the artificial porcelain granule of 3mm~5mm.Regeneration aggregate and lightweight aggregate are the aggregate of saturated dry surface.
Compound additive is made up of water reducer, thickener, retarder and early strength agent；And water reducer, thickener, retarder and
Early strength agent is 5.5 by weight:1.5:0.5:0.35.
2) by step 1) in mixture injection mould in, and injection mixture height should be higher by mold height 14%
(for mixture jolt ramming sinks to preparing, in case the mixture amount in injection mould is few and can not fill whole when jolt ramming is sunk
Mould inside space)；The bottom surface of mould is provided with several piercing holes；Piercing hole is circular port, and the aperture of circular port is
1.8mm, pitch-row are 2.6mm；And multiple circular ports are arranged on the bottom surface of mould in matrix structure；
3) by step 2) in be loaded with the mould of mixture and be placed on jolt ramming shaping is carried out on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, and have size fractionated so as to be formed
Aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, the part of cement during jolt ramming in mixture
Slurry will be moved down, but because mould bottom surface has several piercing holes, so that cement mortar will not be assembled in mould bottom surface；Cement
Starch the permeable effect of entirety that concrete will be influenceed in the aggregation of mould bottom surface；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
5) by step 4) in gradient type porous concrete product conserve to 28d, survey its permeability rate for 6.8mm/s, resist
Compressive Strength is 12.5MPa.
Embodiment 6
A kind of preparation method of gradient type porous concrete product is provided in the embodiment of the present invention, preparation method includes following
Step：
1) by regeneration aggregate 750kg, lightweight aggregate 500kg, portland cement 285kg, flyash 65kg, miberal powder 65kg are multiple
Additive 10kg is closed, water 125kg is weighed rear and is added in mixer, and high-speed stirred is uniform, obtains mixture；
Wherein, composite aggregate is made up of regeneration aggregate and lightweight aggregate, and regeneration aggregate and lightweight aggregate are by volume 1:1
Ratio is mixed into composite aggregate.Regeneration aggregate is that the obtained particle diameter of construction waste concrete processing is the simple grain level of 5mm~10mm
Regeneration aggregate.Regeneration aggregate and lightweight aggregate are the aggregate of saturated dry surface.Lightweight aggregate is the artificial porcelain granule of 3~5mm of particle diameter,
The production technology of its lightweight aggregate includes following steps:(1) curing agent prepare, by weight by 38 parts of blast furnace granulated slag, 40 parts of red mud,
After 30 parts of lime, 3 parts of desulfurated plaster are well mixed, it is aged 4 hours, dries；(2) the dry material of above-mentioned ageing is carried out into powder
Mill, is screened into the curing agent powder that fineness is 0.09mm；(3) by weight by 31 parts of above-mentioned curing agent powder, 65 parts of silt and
After 12 parts of stirring mixing of water, water spray glomeration, it is placed in still kettle the steam pressure hydration reaction under 1.0~1.2MPa and after 8 hours, drops
It is to be made lightweight aggregate to room temperature.
Compound additive is made up of water reducer, thickener, retarder and early strength agent；And water reducer, thickener, retarder and
Early strength agent is 4.5 by weight:2:2.2:0.15.
2) by step 1) in mixture injection mould in, and injection mixture height should be higher by mold height 15%
(for mixture jolt ramming sinks to preparing, in case the mixture amount in injection mould is few and can not fill whole when jolt ramming is sunk
Mould inside space)；The bottom surface of mould is provided with several piercing holes；Piercing hole is circular port, the aperture of circular port is 1mm,
Pitch-row is 2mm；And multiple circular ports are arranged on the bottom surface of mould in matrix structure.
3) by step 2) in be loaded with the mould of mixture and be placed on jolt ramming shaping is carried out on shake table；In jolt ramming process
In, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, and have size fractionated so as to be formed
Aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, the part of cement during jolt ramming in mixture
Slurry will be moved down, but because mould bottom surface has several piercing holes, so that cement mortar will not be assembled in mould bottom surface；Cement
Starch the permeable effect of entirety that concrete will be influenceed in the aggregation of mould bottom surface.
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
5) by step 4) in gradient type porous concrete product conserve to 28d, survey its permeability rate for 4.2mm/s, resist
Compressive Strength is 19.1MPa.
In sum, the present invention makes permeable concrete by the use of construction waste concrete as regeneration aggregate, and this is one
The permeable concrete that natural coarse aggregate is substituted with regeneration aggregate is planted, this ecological porous concrete product not only increases useless
The use approach of concrete high added value is abandoned, natural aggregate exploitation quantity is reduced, the cost for preparing seepy material is reduced.This
The technical scheme low cost of invention, and discarded concrete can be made to be effectively addressed, environmental problem is solved, with significant economy
Property and Environmental.
Porous concrete product prepared by the present invention has the water penetration of different gradients, and permeability rate variation is of the invention
Gradient type porous concrete product refers to size fractionated aggregate and in upper and lower double-layer structure, so that its upper and lower two-layer has
Different permeability rates, technical scheme can solve the problems, such as the single permeability rate of single concrete product.And it is prepared
Porous concrete product stable performance, the easy vibration compacting in preparation process.Preparation method of the invention is simple, easy to operate；
During jolt ramming, lightweight aggregate can be vibrated to upper strata due to light weight, and regeneration aggregate will be moved down, so as to formation be had
Size fractionated aggregate and in the gradient type porous concrete product of upper and lower double-layer structure；Furthermore, during jolt ramming in mixture
Part of cement slurry will be moved down, but by the mould bottom surface that technical solution of the present invention is used has several piercing holes, so that
Cement mortar is set not assemble in mould bottom surface, it is to avoid cement mortar can influence the permeable effect of entirety of concrete in the aggregation of mould bottom surface
Really.
Additionally, in the prior art in making pervious concrete pavement, in order to obtain the road surface of different permeability rates, it is necessary to two
Secondary or multiple construction, construction technology is cumbersome, relatively costly；And use the gradient type porous concrete product of the invention can be with letter
Change construction technology, engineering construction is disposably completed according to actual requirement of engineering, and can obtain and construct several times in the prior art
Identical technique effect.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
God and principle within, any modification, equivalent substitution and improvements made etc., accompanying claims protection domain of the present invention it
It is interior.
Claims (10)
1. a kind of gradient type porous concrete product, it is characterised in that the raw material of the porous concrete product include compound
Aggregate, Binder Materials, compound additive and water, and the weight ratio of the composite aggregate, Binder Materials, compound additive and water is
2.5~3.5:1:0.003~0.03:0.25~0.35.
2. gradient type porous concrete product as claimed in claim 1, it is characterised in that the composite aggregate is by regeneration aggregate
Constituted with lightweight aggregate, and the regeneration aggregate and lightweight aggregate are by volume 1:1 ratio is mixed into the composite aggregate.
3. gradient type porous concrete product as claimed in claim 2, it is characterised in that the regeneration aggregate is construction waste
The obtained particle diameter of concrete processing is 5mm~10mm, apparent density not less than 2500kg/m3Simple grain level regeneration aggregate；It is described
Lightweight aggregate is that particle diameter is 3mm~5mm, bulk density no more than 1000kg/m3Artificial porcelain granule；Preferably, the regeneration aggregate
With the aggregate that the lightweight aggregate is saturated dry surface.
4. gradient type porous concrete product as claimed in claim 1, it is characterised in that the Binder Materials is by silicate cement
Mud, flyash and miberal powder composition, and the portland cement, the flyash, the miberal powder are 6~8 by weight:1~2:1
~2 ratio is mixed into the Binder Materials.
5. gradient type porous concrete product as claimed in claim 4, it is characterised in that the portland cement is 42.5 grades
Or 52.5 grades of portland cements；The flyash is the II grades or II grades flyash of ratings above；The miberal powder is S95 or S95
The miberal powder of ratings above.
6. gradient type porous concrete product as claimed in claim 1, it is characterised in that the compound additive is by diminishing
Agent, thickener, retarder and early strength agent composition；And the water reducer, the thickener, the retarder and the early strength agent are pressed
Weight ratio is 4~6:1~3:0.5~3:0.1~0.5 ratio is mixed into the compound additive.
7. gradient type porous concrete product as claimed in claim 6, it is characterised in that the water reducer subtracts for polycarboxylic acid
Aqua, the thickener is cellulose thickener, and the retarder is glucose retarder, and the early strength agent is three ethanol
Amine early strength agent；Preferably, the water-reducing rate of the polycarboxylate water-reducer is 20%~40%；The thickener is carboxymethyl cellulose
Plain thickener.
8. a kind of preparation method of any described gradient type porous concrete product of claim 1~7, it is characterised in that institute
Preparation method is stated to comprise the following steps：
1) composite aggregate, Binder Materials, water and compound additive are weighed rear according to required proportioning and is added in mixer, it is high
Speed stirs, and obtains mixture；
2) by step 1) in the mixture that obtains injection mould, and the mixture height of injection should be higher by mold height；The mould
The bottom surface of tool is provided with several piercing holes；
3) by step 2) mould for being loaded with mixture that obtains is placed on and jolt ramming shaping carried out on shake table；
4) by step 3) in jolt ramming shaping after mixture conserved, form removal, obtain gradient type porous concrete product.
9. preparation method as claimed in claim 8, it is characterised in that step 2) in, the piercing hole is circular port, the circle
The aperture in shape hole is 1~2mm, pitch-row is 2~4mm；Preferably, the aperture of the circular port be 1mm, pitch-row be 2mm；Further preferably
Ground, multiple circular ports are arranged on the bottom surface of the mould in matrix structure.
10. preparation method as claimed in claim 8, it is characterised in that step 2) in, during slip casting, mixture depanning highly high
The 10%~20% of tool height.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218348A (en) * | 2018-02-02 | 2018-06-29 | 天津城建大学 | A kind of room temperature maintenance alkali-activated carbonatite cementitious material pervious concrete and preparation method thereof |
| CN108275909A (en) * | 2018-02-08 | 2018-07-13 | 韶关学院 | A kind of cement base porous pavement meterial additive and its application |
| CN108409250A (en) * | 2018-04-25 | 2018-08-17 | 广西理工职业技术学院 | The method for preparing green pervious concrete using tailing |
| CN113045281A (en) * | 2021-03-15 | 2021-06-29 | 浙江寰龙环境科技有限公司 | Premixed pervious concrete and preparation process thereof |
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|---|---|---|---|---|
| CN103626447A (en) * | 2013-12-02 | 2014-03-12 | 山东交通学院 | Ecological permeable pavement brick and preparation method thereof |
| CN104402339A (en) * | 2014-11-20 | 2015-03-11 | 天元建设集团有限公司 | Pervious concrete and construction method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103626447A (en) * | 2013-12-02 | 2014-03-12 | 山东交通学院 | Ecological permeable pavement brick and preparation method thereof |
| CN104402339A (en) * | 2014-11-20 | 2015-03-11 | 天元建设集团有限公司 | Pervious concrete and construction method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218348A (en) * | 2018-02-02 | 2018-06-29 | 天津城建大学 | A kind of room temperature maintenance alkali-activated carbonatite cementitious material pervious concrete and preparation method thereof |
| CN108275909A (en) * | 2018-02-08 | 2018-07-13 | 韶关学院 | A kind of cement base porous pavement meterial additive and its application |
| CN108409250A (en) * | 2018-04-25 | 2018-08-17 | 广西理工职业技术学院 | The method for preparing green pervious concrete using tailing |
| CN113045281A (en) * | 2021-03-15 | 2021-06-29 | 浙江寰龙环境科技有限公司 | Premixed pervious concrete and preparation process thereof |
| CN113045281B (en) * | 2021-03-15 | 2022-02-22 | 浙江寰龙环境科技有限公司 | Premixed pervious concrete and preparation process thereof |
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