CN109206037A - The surface treatment method and cement base water-permeable brick surface layer of clay brick recycled fine aggregate - Google Patents
The surface treatment method and cement base water-permeable brick surface layer of clay brick recycled fine aggregate Download PDFInfo
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- CN109206037A CN109206037A CN201811137239.8A CN201811137239A CN109206037A CN 109206037 A CN109206037 A CN 109206037A CN 201811137239 A CN201811137239 A CN 201811137239A CN 109206037 A CN109206037 A CN 109206037A
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- fine aggregate
- recycled fine
- water
- clay brick
- stearate
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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
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention belongs to the field of building materials, in particular to the surface treatment method and cement base water-permeable brick surface layer of a kind of clay brick recycled fine aggregate, the processing method includes the full water process of recycled fine aggregate vacuum, hybrid reaction and cleaning, drying step, in which: vacuum, which is satisfied after water process submerges recycled fine aggregate using ionic calcium soln in closed container, is evacuated to 10 mbar or less；Then solution is pumped, the mixture and catalyst of stearic acid/stearate and water are poured into, is evacuated to 10 mbar again hereinafter, maintaining 2 hours；Recycled fine aggregate cleaning, drying is taken out after being heated to 40 ~ 80 DEG C of reactions 1-3 hours.The method can by simple technique in porous recycled fine aggregate surface and hole in-situ preparation calcium stearate hydrophobic layer, significantly reduce the water absorption rate of recycled fine aggregate, effectively improve the mechanics of recycled cement base water-permeable brick surface material, permeable and endurance quality.
Description
Technical field
The invention belongs to the field of building materials, in particular to a kind of the surface treatment method and water of clay brick recycled fine aggregate
Mud base water-permeable brick surface layer.
Background technique
Compared with developed countries, China's building waste comprehensive utilization of resources level disparity is larger.China's building waste resource
Change regeneration and be still in the exploratory stage at present, construction refuse regenerated utilization rate is only 5%.Traditional air storage or landfill
Equal building wastes processing mode not only aggravates fugitive dust, pollution environment, also takes up large amount of land resources, influence soil vegetative cover.Before menstruation
Phase investigates the old urban area building predominantly brick mix structure for finding to remove in current China, and 70% ~ 80% is discarded clay in building solid waste
Brick will be caused greater pollution to the environment if do not disposed rationally.
Water-permeable brick for its filtration, purification, saves delay rain as a kind of main permeable pavement material, porous feature
Water provides good condition, its excellent environmental effect and ecological effect, have a extensive future in addition.As can passing through some letters
The preparation that clay brick recycled aggregate is applied to water-permeable brick singly is handled, then can both mitigate building solid waste and urban environment is born
Load, and " sponge city " development can be promoted.
However, the generally existing water absorption rate of recycled aggregate is high at present, prepares the disadvantages of regrown material intensity is low, durability is poor.
Numerous scholars and engineering staff have carried out a lot of research work to this: ZL 201210261716.8 discloses a kind of modification regeneration
Aggregate makes nanometer by the way that recycled aggregate is put into immersion treatment in the nano silica hydrocolloid that concentration is 10-40wt %
It is silica-filled that " filing effect " occurs between pore and cement granules and is sent out with the calcium hydroxide in recycled aggregate
Biochemical reaction, which generates C-S-H gel, improves the microstructure of concrete, reduces porosity, improves intensity.ZL
201510046097 .4 disclose a kind of recycled aggregate surface treating agent and its application method, are existed by acrylic acid brine solution
Surface of aggregate, which polymerize and forms the network structure that network structure is formed with cement slurry, mutually to be overlapped, and concrete performance is improved.
However, above technical scheme is mainly for the recycled aggregate for being crushed preparation from concrete, surface often still has greatly
Cement mortar package is measured, biggish water absorption rate is mainly derived from this, and the clay brick recycled fine aggregate that the present invention is directed to is through broken
Broken processing rear surface has almost without other substances, the biggish water absorption rate of clay brick recycled fine aggregate with its own porous feature
It closes.Therefore, common recycled aggregate surface treatment method is not particularly suited for clay brick recycled fine aggregate.
Summary of the invention
It is an object of the present invention to provide a kind of surface treatment methods of clay brick recycled fine aggregate.Of the invention is another
A purpose is to provide a kind of application of the surface treatment method of clay brick recycled fine aggregate as cement base water-permeable brick surface layer.
The present invention can significantly reduce clay brick recycled fine aggregate water absorption rate, improve the cement base water-permeable brick face using its preparation
The performance of layer material.
The specific technical solution that the present invention uses is as follows:
A kind of surface treatment method of clay brick recycled fine aggregate, clay brick recycled fine aggregate are molten in vacuum absorption saturation calcium ion
After liquid, reacted under the action of catalyst with stearic acid or stearate with aqueous mixtures, on clay brick recycled fine aggregate surface and
In-situ preparation calcium stearate in hole, reaction step are as follows:
Step (1) vacuum, which is satisfied after water process submerges clay brick fine aggregate in closed container using saturation ionic calcium soln, to be vacuumized
To 10 mbar hereinafter, keeping 48h, the ionic calcium soln is one of calcium hydroxide, calcium chloride, calcium nitrate；
Step (2) pumps solution, and the mixture for pouring into stearic acid and water that mass ratio is 1:5-20 submerges recycled fine aggregate；
Hydrogen peroxide and alcohol is added as composite catalyst in step (3), and the alcohol is the mixture of mass ratio 1:1 ethyl alcohol, propyl alcohol, control
Producing hydrogen peroxide and stearic mass ratio are 1:5, and alcohol and stearic mass ratio are 1:20, and are evacuated to 10 mbar again
Hereinafter, maintaining 2 hours；
Step (4) takes out recycled fine aggregate cleaning, drying after being heated to 40-80 DEG C of reaction 1-3 hours.
Further improvement of the present invention, reaction step are as follows:
Step (1) vacuum, which is satisfied after water process submerges clay brick fine aggregate in closed container using saturation ionic calcium soln, to be vacuumized
To 10 mbar hereinafter, keeping 48h, the ionic calcium soln is one of calcium hydroxide, calcium chloride, calcium nitrate；
Step (2) pumps solution, and the mixture for pouring into stearate and water that mass ratio is 1:5 ~ 20 submerges recycled fine aggregate, institute
The stearate stated is one of odium stearate, ammonium stearate；；
Step (3) takes out recycled fine aggregate cleaning, drying after being heated to 40 ~ 80 DEG C of reactions 1-3 hours.
It invention further discloses a kind of cement base water-permeable brick surface layer, forms based on parts by weight, including following components:
300-450 parts of cement,
Single-stage matches 1400-1600 parts of clay brick recycled fine aggregate,
80-120 parts of water,
6-10 parts of water-reducing agent.
Wherein, the cement is the portland cement or ordinary portland cement of strength grade 42.5 or 52.5, described
Single-stage is made with clay brick recycled fine aggregate using the surface treatment method of above-mentioned clay brick recycled fine aggregate, and the single-stage is with viscous
Cob brick aggregate is any one in partial size 2.36-5.75mm, 1.18-2.36 mm or 0.6-1.18 mm, and water-reducing agent is poly- carboxylic
Sour high-performance water reducing agent.
Beneficial effects of the present invention: clay brick recycled fine aggregate water absorption rate processed by the invention is decreased obviously, and is prepared
Regenerative pervious brick surface layer compression strength be higher than untreated regenerative pervious brick surface layer, and coefficient of permeability significantly improves, freeze proof
Performance is more preferable.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
In order to evaluate the present invention to the improvement of clay brick aggregate, clay brick aggregate is according to 352 " concrete for hydraulic structure of SL
Testing regulations " (die trial method) measurement dry moisture content of aggregate saturation plane.
In order to evaluate the present invention to the improvement of the water-permeable brick surface layer performance of clay brick aggregate preparation, preparation maintenance 28d
Afterwards, test piece intensity, coefficient of permeability and freezing-thawing cycles are tested respectively.Concrete operations are as follows:
Preparation: by recycled fine aggregate, cement in forced mixer premixing 120s, then water and water-reducing agent are sequentially added into pressure
Formula blender, mix 120s.
Molding and maintenance: compression strength and coefficient of permeability test specimen use 100 × 100 × 100 mm3Concrete test die at
Type, freeze thawing test specimen use 100 × 100 × 400 mm3Concrete test die molding, molding use press machine compression moulding, pressure
10kN maintains 5s, demoulding after curing in the mold 1d, standard curing to 28d.
Test: 28 d compression strength of test specimen referring to GB/T 50081 " standard for test methods of mechanical properties of ordinary concrete " into
Row test.Test specimen coefficient of permeability is referring to CJJ/T 135 " pervious concrete pavement technical regulation " measuring and calculation.Test specimen Frozen-thawed cycled
Number is referring to the related rule for freezing method in GB/T 50082 " Standard for test methods of longterm performance and durability of ordinary concrete standard " fastly
Fixed test.
Embodiment 1
A kind of surface treatment method of clay brick recycled fine aggregate: (1) the full water process of vacuum is existed using saturated calcium hydroxide solution
10 mbar are evacuated to after submergence 2.36-5.75mm recycled fine aggregate hereinafter, keeping 48h in closed container；(2) solution is pumped,
The mixture for pouring into stearic acid and water that mass ratio is 1:20 submerges recycled fine aggregate；(3) hydrogen peroxide and alcohol is added as compound
Catalyst, the alcohol are the mixture of mass ratio 1:1 ethyl alcohol, propyl alcohol, and control hydrogen peroxide and stearic mass ratio are 1:5, alcohol
It is 1:20 with stearic mass ratio, and is evacuated to 10 mbar again hereinafter, maintaining 2 hours；(4) 40 ~ 80 DEG C are heated to
Recycled fine aggregate cleaning, drying is taken out after reaction 3 hours.
A kind of surface treatment method of clay brick recycled fine aggregate and its application in cement base water-permeable brick surface layer, it is described
Cement base water-permeable brick surface layer, be made of following weight percent: 300 parts of 42.5 cement of PO is in the above way handled
1400 parts of 2.36-5.75mm clay brick aggregate, 80 parts of water, 6 parts of high performance water reducing agent of polyocarboxy acid.
Embodiment 2
A kind of surface treatment method of clay brick recycled fine aggregate: (1) the full water process of vacuum is using saturation calcium chloride solution close
It closes in container and is evacuated to 10 mbar after submergence 1.18-2.36 mm recycled fine aggregate hereinafter, keeping 48h；(2) solution is pumped,
Pour into mass ratio be 1:5 ammonium stearate and water mixture submerge recycled fine aggregate, and be evacuated to again 10 mbar with
Under, it maintains 2 hours；(3) recycled fine aggregate cleaning, drying is taken out after being heated to 40 ~ 80 DEG C of reactions 1 hour.
A kind of surface treatment method of clay brick recycled fine aggregate and its application in cement base water-permeable brick surface layer, it is described
Cement base water-permeable brick surface layer, be made of following weight percent: 400 parts of 52.5 cement of PII is in the above way handled
1500 parts of aggregate of 1.18-2.36 mm clay brick, 100 parts of water, 8 parts of high performance water reducing agent of polyocarboxy acid.
Embodiment 3
A kind of surface treatment method of clay brick recycled fine aggregate: (1) the full water process of vacuum is using saturation calcium nitrate solution close
It closes in container and is evacuated to 10 mbar after submergence 0.6-1.18 mm recycled fine aggregate hereinafter, keeping 48h；(2) solution is pumped,
Enter mass ratio be 1:10 odium stearate and water mixture submerge recycled fine aggregate, and be evacuated to 10 mbar again hereinafter,
It maintains 2 hours；(3) recycled fine aggregate cleaning, drying is taken out after being heated to 40 ~ 80 DEG C of reactions 2 hours.
A kind of surface treatment method of clay brick recycled fine aggregate and its application in water-permeable brick surface layer, described is permeable
Brick surface layer is made of following weight percent: 450 parts of 52.5 cement of PII, the 0.6-1.18 mm in the above way handled
1600 parts of clay brick aggregate, 120 parts of water, 10 parts of high performance water reducing agent of polyocarboxy acid.
Comparative example 1
Not surface treated 2.36-5.75mm clay brick recycled fine aggregate.
Cement base water-permeable brick surface layer is made of following weight percent: 300 parts of 42.5 cement of PO is in the above way located
1400 parts of the 2.36-5.75mm clay brick aggregate of reason, 80 parts of water, 6 parts of high performance water reducing agent of polyocarboxy acid.
Comparative example 2
Not surface treated 1.18-2.36 mm clay brick recycled fine aggregate.
Cement base water-permeable brick surface layer is made of following weight percent: 400 parts of 52.5 cement of PII is in the above way located
1500 parts of aggregate, 100 parts of water, 8 parts of high performance water reducing agent of polyocarboxy acid of the 1.18-2.36 mm clay brick of reason.
Comparative example 3
Not surface treated 0.6-1.18 mm clay brick recycled fine aggregate.
Cement base water-permeable brick surface layer is made of following weight percent: 450 parts of 52.5 cement of PII is in the above way located
1600 parts of aggregate, 120 parts of water, 10 parts of high performance water reducing agent of polyocarboxy acid of the 0.6-1.18 mm clay brick of reason.
The water absorption rate comparison of 1 different-grain diameter clay brick recycled fine aggregate of table surface treatment front and back
| Aggregate size | Embodiment | Comparative example |
| 2.36-5.75mm | 0.98%(embodiment 1) | 9.85%(comparative example 1) |
| 1.18-2.36 mm | 1.98%(embodiment 2) | 11.38%(comparative example 2) |
| 0.6-1.18 mm | 1.12%(embodiment 3) | 15.43%(comparative example 3) |
2 cement base water-permeable brick surface material performance of table
| Performance indicator | Embodiment 1 | Comparative example 1 | Embodiment 2 | Comparative example 2 | Embodiment 3 | Comparative example 3 |
| Compression strength/MPa | 4.36 | 2.54 | 5.19 | 3.59 | 6.83 | 4.12 |
| Coefficient of permeability/mm/s | 2.41 | 1.98 | 1.83 | 1.35 | 0.87 | 0.43 |
| Freeze proof number/time | 50 | 25 | 100 | 50 | 125 | 75 |
Comparative example uses not surface treated clay brick recycled fine aggregate it can be seen from upper table result, and water absorption rate is obvious
Higher than treated aggregate；Using the water-permeable brick surface layer test specimen of not surface treated clay brick recycled fine aggregate preparation in 28d
It is markedly less than respectively in terms of compression strength, coefficient of permeability and freeze proof number using same particle size clay brick after above-mentioned surface treatment again
The cement base water-permeable brick surface layer test specimen of raw fine aggregate preparation.It can be seen that above-mentioned surface treatment method is in cement base water-permeable brick surface layer
Material property promotes aspect and plays key effect, inventor's analysis main reason is that:
(1) under condition of negative pressure calcium stearate will in clay brick recycled fine aggregate surface and hole in-situ preparation, can effectively press down
The water absorption character of clay brick recycled fine aggregate itself processed, is reduced in mix and aggregate adsorbs required for a large amount of hydrated cementitious after mix
Water, guarantee cement base water-permeable brick surface material strength development；
(2) the part of stearic acid calcium on clay brick recycled fine aggregate surface can be dispersed in cement during aggregate and cement premixing
In, its slurry and aggregate fraction all have hydrophobic function after the hardening of water-permeable brick surface material, promote the promotion of coefficient of permeability；
(3) two aspect reason collective effect more than, moisture are more difficult to penetrate into the cement base water-permeable brick face prepared after surface treatment
In the slurry of layer, the generation of freeze-thaw damage is delayed to a certain extent.
Each raw material bound value of the invention and its interval value can realize the present invention, reality numerous to list herein
Apply example.
The basic principles and main features and advantage of this method have been shown and described above.The technical staff of the industry should
Understand, this method is not restricted to the described embodiments, and the above embodiments and description only describe the originals of this method
Reason, under the premise of not departing from this method spirit and scope, this method be will also have various changes and improvements, these changes and improvements
It both falls within the scope of claimed this method.Process require that protection scope is by appended claims and its equivalent circle
It is fixed.
Claims (3)
1. a kind of surface treatment method of clay brick recycled fine aggregate, which is characterized in that clay brick recycled fine aggregate is inhaled in vacuum
Receive saturation ionic calcium soln after, reacted under the action of catalyst with stearic acid or stearate with aqueous mixtures, clay brick again
In-situ preparation calcium stearate in raw fine aggregate surface and hole, reaction step are as follows:
Step (1) vacuum, which is satisfied after water process submerges clay brick fine aggregate in closed container using saturation ionic calcium soln, to be vacuumized
To 10 mbar hereinafter, keeping 48h, the ionic calcium soln is one of calcium hydroxide, calcium chloride, calcium nitrate；
Step (2) pumps solution, and the mixture for pouring into stearic acid and water that mass ratio is 1:5-20 submerges recycled fine aggregate；
Hydrogen peroxide and alcohol is added as composite catalyst in step (3), and the alcohol is the mixture of mass ratio 1:1 ethyl alcohol, propyl alcohol, control
Producing hydrogen peroxide and stearic mass ratio are 1:5, and alcohol and stearic mass ratio are 1:20, and are evacuated to 10 mbar again
Hereinafter, maintaining 2 hours；
Step (4) takes out recycled fine aggregate cleaning, drying after being heated to 40-80 DEG C of reaction 1-3 hours.
2. the surface treatment method of clay brick recycled fine aggregate according to claim 1, which is characterized in that reaction step is such as
Under:
Step (1) vacuum, which is satisfied after water process submerges clay brick fine aggregate in closed container using saturation ionic calcium soln, to be vacuumized
To 10 mbar hereinafter, keeping 48h, the ionic calcium soln is one of calcium hydroxide, calcium chloride, calcium nitrate；
Step (2) pumps solution, and the mixture for pouring into stearate and water that mass ratio is 1:5 ~ 20 submerges recycled fine aggregate, institute
The stearate stated is one of odium stearate, ammonium stearate；；
Step (3) takes out recycled fine aggregate cleaning, drying after being heated to 40 ~ 80 DEG C of reactions 1-3 hours.
3. a kind of cement base water-permeable brick surface layer, which is characterized in that it is formed based on parts by weight, including following components:
300-450 parts of cement,
Single-stage matches 1400-1600 parts of clay brick recycled fine aggregate,
80-120 parts of water,
6-10 parts of water-reducing agent,
The cement is the portland cement or ordinary portland cement of strength grade 42.5 or 52.5, and the single-stage matches clay
Brick recycled fine aggregate is made using the surface treatment method of clay brick recycled fine aggregate as claimed in claim 1 or 2, the list
Gradation clay brick aggregate is any one in partial size 2.36-5.75mm, 1.18-2.36 mm or 0.6-1.18 mm, water-reducing agent
For high performance water reducing agent of polyocarboxy acid.
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| CN110510947A (en) * | 2019-08-29 | 2019-11-29 | 江苏苏博特新材料股份有限公司 | The method that microwave curing prepares the low-quality mine spike recycled cement based articles of large dosage |
| CN110510947B (en) * | 2019-08-29 | 2021-10-01 | 江苏苏博特新材料股份有限公司 | Method for preparing high-doping-amount low-quality ore-doped regenerated cement-based product through microwave curing |
| CN112194400A (en) * | 2020-06-05 | 2021-01-08 | 深圳大学 | Core-shell structure lightweight aggregate prepared by cold bonding method and preparation method thereof |
| CN112408923A (en) * | 2020-11-21 | 2021-02-26 | 湖北云海混凝土有限公司 | Permeable compression-resistant concrete and preparation method thereof |
| CN112876169A (en) * | 2021-02-24 | 2021-06-01 | 辽宁壹立方砂业有限责任公司 | Slurry coating composition, slurry coating aggregate and preparation method thereof |
| CN114988796A (en) * | 2022-05-27 | 2022-09-02 | 南京工程学院 | Recycled broken brick concrete based on interface enhancement and preparation method thereof |
| CN115093148A (en) * | 2022-06-27 | 2022-09-23 | 深圳大学 | Hydrophobic regenerated material and preparation method and application thereof |
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Application publication date: 20190115 |