CN106082881A - A kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof - Google Patents
A kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof Download PDFInfo
- Publication number
- CN106082881A CN106082881A CN201610489895.9A CN201610489895A CN106082881A CN 106082881 A CN106082881 A CN 106082881A CN 201610489895 A CN201610489895 A CN 201610489895A CN 106082881 A CN106082881 A CN 106082881A
- Authority
- CN
- China
- Prior art keywords
- brick
- clay brick
- discarded clay
- paving
- prepare
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof, with discarded clay brick as primary raw material, adds the raw materials such as surface modifier, reinforcing agent, cement, water and makes paving brick.Preparation method is that discarded clay brick crushes shaping sub-sieve, adds surface modifier, is uniformly mixed；It is subsequently adding cement, reinforcing agent, water mixing and stirring；In 50 60 MPa forming under the pressure, the demoulding, standard curing 28 days, obtain paving brick goods.The present invention discards clay brick addition in the paving brick of preparation 80 85%, and discarded clay brick is the most fully utilized, and utilization rate is 100%, does not produce secondary side-product, the useless environmental protection of profit, and the paving brick excellent performance of preparation.
Description
Technical field
The present invention relates to a kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof, belong to construction material neck
Territory.
Background technology
Along with China's economic development and the quickening of ur-banization speed, the most all remove large quantities of old building, building waste
Day by day increasing, wherein clay brick accounts for sizable ratio, brings huge pressure to environment and land resource.According to statistics, I
State discards the quantum of output about 52,000,000 tons of clay brick every year, and therefore efficiently utilizing of clay brick can improve construction refuse resource
Integral level, effectively save energy resources, reduce destruction to limited arable land, reduce the pressure to environment.
Utilization to discarded clay brick at present concentrates on and prepares regeneration aggregate, regeneration filler etc., overall regeneration level
Low, the product of regeneration actually used range-restricted greatly.Such as, patent is " with discarded clay brick for substituting the regeneration of coarse aggregate
Concrete and preparation method thereof (CN201510487381.5) " and patent " the discarded clay brick of employing and the regeneration of discarded concrete
Aggregate concrete and preparation method thereof (CN201510487349.7) " report and discarded clay brick is made aggregate re-using,
But the adding proportion 10%～30% of discarded clay brick, and along with the raising of addition, water absorption rate is gradually increased, and have impact on coagulation
The intensity of soil.Patent " a kind of alkali-excited cement utilizing discarded clay brick powder and preparation method thereof " (CN 105399353 A) is reported
Road, by clay brick grinds, utilizes alkali-activated carbonatite, prepares geopolymer.This method needs to add high-calcium fly ass, and one
Under fixed condition, maintenance obtains, and belongs simultaneously to clinker-free cement, can only replace part of cement within the specific limits and use.
Summary of the invention
It is an object of the invention to the deficiency existed for prior art, in order to realize effective utilization of discarded clay brick, system
Standby high-performance paving brick, proposes a kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof, and discarded clay brick is permissible
The most fully utilized, utilization rate is 100%, and the paving brick excellent performance of preparation.
To this end, the present invention uses technical scheme as follows, utilize paving brick prepared by discarded clay brick, raw materials used by weight
Part meter is respectively as follows: discarded clay brick 100 parts, cement 10-20 part, reinforcing agent 0.3-0.5 part, surface modifier 0.5-1.0 part, water
10-15 part.
Described reinforcing agent is any one or a few of acrylic acid ester emulsion, styrene-butadiene emulsion, styrene-acrylic emulsion or silicone acrylic emulsion,
Solid content is 45-55%.
Described surface modifier is cationic surfactant: diethanolamine, triethanolamine or lauric acid amide of ethanol
Any one or a few.
Described cement is scenery with hills and waters P × O425 portland cement.
Preparation method step of the present invention is as follows:
(1) discarded clay brick being crushed shaping sub-sieve, discarded clay brick Powder Particle Size is distributed as: ＜ 0.15 mm, 15%-20%；
0.15mm-1.5mm, 50%-65%；4.75 mm-9.5 mm, 20%-30%；The discarded clay brick powder of particle size distribution ＜ 0.15mm
Middle addition surface modifier, is uniformly mixed；
(2) discarded clay brick adds cement, reinforcing agent, water mixing and stirring；
(3) at 50-60 MPa forming under the pressure, the demoulding, standard curing 28 days, obtain paving brick goods.
The invention has the beneficial effects as follows:
(1) discarded clay brick addition in the paving brick of preparation is at 80-85%, and discarded clay brick is the most fully utilized, profit
It is 100% by rate, does not produce secondary side-product, the useless environmental protection of profit.
(2) brick powder adds cationic surfactant and adds emulsion reinforcing agent, can be with electronegative emulsion particle phase
Absorption mutually, thus change the electrical of emulsion surface, the combination improving with crushing clay brick surface.Cation and broken brick powder simultaneously
When being used together, the viscosity of emulsion particle can be reduced, thus suppress the accumulation of emulsion particle, improve the property preparing paving brick
Energy.
(3) the paving brick goods that prepared by the present invention are at unit weight 1900-2000 kg mm-3, the performance indications such as intensity are superior to
National standard.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described, in order to those skilled in the art is more preferable
Understand the present invention, but and be not so limited the present invention.
Embodiment 1.
Utilize paving brick prepared by discarded clay brick, raw materials used be respectively as follows: discarded clay brick 100 parts, cement by weight
10 parts, 15 parts of water, reinforcing agent 0.3 part, surface modifier 0.5 part.
Reinforcing agent is acrylic acid ester emulsion, and solid content is 45-55%.
Surface modifier is diethanolamine.
Preparation method is: discarded clay brick is crushed shaping sub-sieve, and discarded clay brick Powder Particle Size is distributed as: < 0.15
mm, 20%；0.15mm-1.5mm, 50%；4.75 mm-9.5 mm, 30%.By granularity < the discarded clay brick powder of 0.15mm and table
Face modifying agent is mixed evenly.Then by discarded clay brick, cement, water, the material such as reinforcing agent is mixed in proportion, and stirs,
50 MPa forming under the pressure, the demoulding, standard curing 28 days, obtain paving brick goods, performance indications are as shown in table 1.
Table 1. utilizes the performance parameter discarding paving brick goods prepared by clay brick
Embodiment 2.
Utilize paving brick prepared by discarded clay brick, raw materials used be respectively as follows: discarded clay brick 100 parts, cement by weight
15 parts, reinforcing agent 0.3 part, surface modifier 0.75 part, 12 parts of water.
Reinforcing agent is styrene-butadiene emulsion, and solid content is 45-55%.
Surface modifier triethanolamine.
Discarded clay brick is crushed shaping sub-sieve, and discarded clay brick Powder Particle Size is distributed as: < 0.15 mm, 20%；
0.15mm-1.5mm, 60%；4.75 mm-9.5 mm, 20%.By granularity < the discarded clay brick powder of 0.15mm and surface modifier
It is mixed evenly.Then by discarded clay brick, cement, water, the material such as reinforcing agent, by mixing, stirs, and then presses at 55 MPa
Power compacted under, the demoulding, standard curing 28 days, obtain paving brick goods, performance indications are as shown in table 2.
Table 2. utilizes the performance parameter discarding paving brick goods prepared by clay brick
Embodiment 3.
Utilize paving brick prepared by discarded clay brick, raw materials used be respectively as follows: discarded clay brick 100 parts, cement by weight
18 parts, reinforcing agent 0.4 part, surface modifier 1 part, 12 parts of water.
Reinforcing agent is styrene-acrylic emulsion, and solid content is 45-55%.
Surface modifier is lauric acid amide of ethanol.
Discarded clay brick is crushed shaping sub-sieve, and discarded clay brick Powder Particle Size is distributed as: < 0.15 mm, 15%；
0.15mm-1.5mm, 55%；4.75 mm-9.5 mm, 30%.By granularity < the discarded clay brick powder of 0.15 mm and surface modification
Agent is mixed evenly.Then by discarded clay brick, cement, water, the material such as reinforcing agent, by mixing, stirs, and then presses at 60MPa
Power compacted under, the demoulding, standard curing 28 days, obtain paving brick product properties index and be shown in Table 3.
Table 3. utilizes the performance parameter discarding paving brick goods prepared by clay brick
Embodiment 4.
Utilize paving brick prepared by discarded clay brick, raw materials used be respectively as follows: discarded clay brick 100 parts, cement by weight
20 parts, reinforcing agent 0.5 part, surface modifier 1 part, 10 parts of water.
Reinforcing agent is silicone acrylic emulsion, and solid content is 45-55%.
Surface modifier is triethanolamine and lauric acid amide of ethanol mixed in equal amounts.
Discarded clay brick is crushed shaping sub-sieve, and discarded clay brick Powder Particle Size is distributed as: < 0.15 mm, 15%；
0.15mm-1.5mm, 65%；4.75 mm-9.5 mm, 20%.By granularity < the discarded clay brick powder of 0.15mm and surface modifier
It is mixed evenly.Then by discarded clay brick, cement, water, the material such as reinforcing agent, by mixing, stirs, then at 60MPa pressure
Compacted under, the demoulding, standard curing 28 days, obtain paving brick product properties index part table 4.
Table 4. utilizes the performance parameter discarding paving brick goods prepared by clay brick
Claims (6)
1. the paving brick utilizing discarded clay brick to prepare, is characterized in that, raw materials used is respectively as follows: discarded clay brick by weight
100 parts, cement 10-20 part, reinforcing agent 0.3-0.5 part, surface modifier 0.5-1.0 part, water 10-15 part.
2. the paving brick utilizing discarded clay brick to prepare as claimed in claim 1, is characterized in that, described discarded clay brick powder
Degree is distributed as: ＜ 0.15 mm, 15%-20%；0.15mm-1.5mm, 50%-65%；4.75 mm-9.5 mm, 20%-30%.
3. the paving brick utilizing discarded clay brick to prepare as claimed in claim 1, is characterized in that, described reinforcing agent is acrylic acid
Any one or a few of ester emulsion, styrene-butadiene emulsion, styrene-acrylic emulsion or silicone acrylic emulsion, solid content is 45-55%.
4. the paving brick utilizing discarded clay brick to prepare as claimed in claim 1, is characterized in that, described surface modifier is sun
Ionic surface active agent: any one or a few of diethanolamine, triethanolamine or lauric acid amide of ethanol.
5. the as claimed in claim 1 paving brick utilizing discarded clay brick to prepare, is characterized in that, described cement be scenery with hills and waters P ×
O425 portland cement.
6. the method preparing the arbitrary described paving brick of claim 1-5, is characterized in that, step is as follows:
(1) discarded clay brick being crushed shaping sub-sieve, discarded clay brick Powder Particle Size is distributed as: ＜ 0.15 mm, 15%-20%；
0.15mm-1.5mm, 50%-65%；4.75 mm-9.5 mm, 20%-30%；The discarded clay brick powder of particle size distribution ＜ 0.15mm
Middle addition surface modifier, is uniformly mixed；
(2) discarded clay brick adds cement, reinforcing agent, water mixing and stirring；
(3) at 50-60 MPa forming under the pressure, the demoulding, standard curing 28 days, obtain paving brick goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489895.9A CN106082881B (en) | 2016-06-29 | 2016-06-29 | A kind of paving brick prepared using discarded clay brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489895.9A CN106082881B (en) | 2016-06-29 | 2016-06-29 | A kind of paving brick prepared using discarded clay brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106082881A true CN106082881A (en) | 2016-11-09 |
| CN106082881B CN106082881B (en) | 2018-06-29 |
Family
ID=57214503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610489895.9A Active CN106082881B (en) | 2016-06-29 | 2016-06-29 | A kind of paving brick prepared using discarded clay brick and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106082881B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010969A (en) * | 2017-04-21 | 2017-08-04 | 常州市好利莱光电科技有限公司 | A kind of preparation method of high-alumina brick |
| CN107743788A (en) * | 2017-11-07 | 2018-03-02 | 河南建筑材料研究设计院有限责任公司 | A kind of discarded admaic earth brick powder ceramic flowerpot |
| CN113636768A (en) * | 2021-07-17 | 2021-11-12 | 北京城建华晟交通建设有限公司 | Excited clay brick micro powder and preparation method thereof, cementing material and regenerated brick |
| CN114890749A (en) * | 2022-05-26 | 2022-08-12 | 湘潭大学 | Electrolytic manganese slag and waste clay brick double-doped baking-free brick and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383939A (en) * | 2002-05-28 | 2002-12-11 | 王辉 | Regenrated brick and its production process |
| CN1673160A (en) * | 2005-03-09 | 2005-09-28 | 北京华丰建业环保科技有限公司 | Building refuse brick and its making process |
| CN101074155A (en) * | 2007-06-19 | 2007-11-21 | 肖国华 | Method for regenerating bricks and tiles from building refuses |
| CN101186472A (en) * | 2007-12-20 | 2008-05-28 | 河北农业大学 | Technical method for recycling construction waste and industrial solid waste |
| CN102701655A (en) * | 2012-06-21 | 2012-10-03 | 四川大学 | Environmental-protection type regeneration brick and preparation method thereof |
| CN103373838A (en) * | 2012-04-22 | 2013-10-30 | 关致新 | Construction waste production building brick and preparation method thereof |
| CN103396045A (en) * | 2013-07-24 | 2013-11-20 | 黄继军 | Environment-friendly ecological brick and production method thereof |
| CN104402380A (en) * | 2014-11-05 | 2015-03-11 | 长江南京航道工程局 | Curing material based on viscous waste soil, and preparation method thereof |
| CN105084926A (en) * | 2014-05-08 | 2015-11-25 | 闵建华 | Method for regenerating bricks and tiles from construction waste |
-
2016
- 2016-06-29 CN CN201610489895.9A patent/CN106082881B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383939A (en) * | 2002-05-28 | 2002-12-11 | 王辉 | Regenrated brick and its production process |
| CN1673160A (en) * | 2005-03-09 | 2005-09-28 | 北京华丰建业环保科技有限公司 | Building refuse brick and its making process |
| CN101074155A (en) * | 2007-06-19 | 2007-11-21 | 肖国华 | Method for regenerating bricks and tiles from building refuses |
| CN101186472A (en) * | 2007-12-20 | 2008-05-28 | 河北农业大学 | Technical method for recycling construction waste and industrial solid waste |
| CN103373838A (en) * | 2012-04-22 | 2013-10-30 | 关致新 | Construction waste production building brick and preparation method thereof |
| CN102701655A (en) * | 2012-06-21 | 2012-10-03 | 四川大学 | Environmental-protection type regeneration brick and preparation method thereof |
| CN103396045A (en) * | 2013-07-24 | 2013-11-20 | 黄继军 | Environment-friendly ecological brick and production method thereof |
| CN105084926A (en) * | 2014-05-08 | 2015-11-25 | 闵建华 | Method for regenerating bricks and tiles from construction waste |
| CN104402380A (en) * | 2014-11-05 | 2015-03-11 | 长江南京航道工程局 | Curing material based on viscous waste soil, and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010969A (en) * | 2017-04-21 | 2017-08-04 | 常州市好利莱光电科技有限公司 | A kind of preparation method of high-alumina brick |
| CN107743788A (en) * | 2017-11-07 | 2018-03-02 | 河南建筑材料研究设计院有限责任公司 | A kind of discarded admaic earth brick powder ceramic flowerpot |
| CN113636768A (en) * | 2021-07-17 | 2021-11-12 | 北京城建华晟交通建设有限公司 | Excited clay brick micro powder and preparation method thereof, cementing material and regenerated brick |
| CN114890749A (en) * | 2022-05-26 | 2022-08-12 | 湘潭大学 | Electrolytic manganese slag and waste clay brick double-doped baking-free brick and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106082881B (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106673592B (en) | The method for preparing concrete road pavement brick using construction refuse regenerated aggregate | |
| CN104150840B (en) | C60 full-manufactured sand super high-rise pump concrete | |
| CN111003984B (en) | Novel tailing mixed soil road subgrade material and preparation method thereof | |
| CN106082881B (en) | A kind of paving brick prepared using discarded clay brick and preparation method thereof | |
| CN114804675B (en) | Composite alkali-activated cementing material and preparation method thereof | |
| CN106116358B (en) | High-performance permeable concrete system prepared by a kind of building waste and preparation method thereof | |
| CN114525136B (en) | Red mud-based soil curing agent and preparation method thereof | |
| CN102040360A (en) | Tailing sand brick with high weather resistance and preparation method thereof | |
| CN108083697A (en) | A kind of large dosage steel slag concrete building block and preparation method thereof | |
| CN104310880A (en) | Method for improving freeze-thaw resistance of concrete by using waste incineration fly ash pre-treated by washing | |
| CN108821682A (en) | A kind of low cost alternate resources high crack-resisting and its preparation method | |
| CN103449776B (en) | A kind of construction slurry steaming-free air-adding concrete segment and manufacture method thereof | |
| CN101857403A (en) | Permeable concrete and preparation method thereof | |
| CN107417228A (en) | A kind of high water conservation flyash high-water material of novel high-strength | |
| CN113354376A (en) | Phosphogypsum-based aggregate and preparation method thereof | |
| CN108569878B (en) | Resourceful treatment method for waste powder recovered by asphalt concrete mixing station | |
| CN101302094A (en) | Steel slag grouting material and preparation thereof | |
| CN102581922A (en) | Preparation method for aerated concrete building blocks of quartz vein type gold mine tailings | |
| CN106396533B (en) | A kind of low concrete of creeping prepared using concrete mixing plant waste pulp | |
| CN102531435A (en) | Super-fine sand blended fine aggregate for pump concrete | |
| CN116283118B (en) | Pavement base material based on organic-inorganic cementing material synergistic stabilization phosphogypsum and recycled aggregate and preparation method thereof | |
| CN105601205A (en) | Foundry waste sand self-compacting concrete | |
| CN104478340A (en) | Low-cost concrete preparation method | |
| CN101481238A (en) | Green soil curing agent | |
| CN101486913B (en) | Black soil curing agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |