CN107235646A - Concrete regenerating powder microdilatancy eco-cement and preparation method thereof - Google Patents
Concrete regenerating powder microdilatancy eco-cement and preparation method thereof Download PDFInfo
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- CN107235646A CN107235646A CN201710366557.0A CN201710366557A CN107235646A CN 107235646 A CN107235646 A CN 107235646A CN 201710366557 A CN201710366557 A CN 201710366557A CN 107235646 A CN107235646 A CN 107235646A
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- cement
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Classifications
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a kind of concrete regenerating powder microdilatancy eco-cement and preparation method thereof, the microdilatancy eco-cement is by concrete regenerating powder, manganese slag, gypsum, silica flour, lime, MgO/CaCl2And Na2SO4Raw material is mixed, the present invention makes full use of existing discarded concrete and manganese slag, and other raw materials are added by appropriate harmonic proportion, form an ecology and the cement with microdilatancy effect, it can reach and make full use of solid pollutant, cause that the cement that is made is up to state standards intensity again, with very high environmental benefit and economic benefit.
Description
Technical field
The present invention relates to a kind of concrete regenerating powder microdilatancy eco-cement and preparation method thereof, belong to inorganic non-metallic material
Expect technical field.
Background technology
At present, China is in large-scale urbanization process, particularly Guizhou Province Gui Anxinqu, high-speed railway and big
The construction of the engineerings such as Xuecheng, is required to remove a large amount of old concrete structures, and produced in work progress it is unqualified discarded
Concrete, this causes the yield of discarded concrete to sharply increase.In recent years, the total output of the annual building waste of China was in 15.5-
Between 24.0 hundred million tons, wherein most is discarded concrete.If these discarded concretes are not utilized rationally, it stores up
Substantial amounts of land resource will be taken, and local air and groundwater environment will be polluted, this turns into what be can not be ignored now
Resource, society and environmental issue.Secondly as Portland cement energy consumption and discharge are high, its use is caused by many
Limitation, is badly in need of finding a kind of alternate resources.In addition, manganese ore be come after iron ore, aluminium ore the 3rd large metal, belong to strategic
Mineral resources, from steel, to chemical industry, to medicine, the application of manganese is almost related to the every aspect of our production and living.2015
Year, China's more than 4,000 ten thousand tons of manganese ore of consumption produces more than 300,000,000 tons of slag；At present, the manganese ore deposit that Guizhou geology and minerals bureau finds is reached more than 600,000,000
Ton, accounts for more than the 60% of the whole nation, it may be said that be Asia first, and the world the 5th, so many manganese ore will produce nearly 50 once developing
Hundred million tons of waste residues.Therefore, the development of manganese slag and discarded concrete regenerative gel material has huge realistic meaning.
The content of the invention
The purpose of the present invention is：A kind of concrete regenerating powder microdilatancy eco-cement and preparation method thereof is provided and is preparing sand
Application on slurry/concrete, to solve concrete regenerating powder and manganese slag can not be utilized effectively and cause the skill accumulated for a long time
Art problem.
Technical scheme
A kind of concrete regenerating powder microdilatancy eco-cement, the microdilatancy eco-cement is by concrete regenerating powder, manganese slag, stone
Cream, silica flour, lime, MgO/CaCl2And Na2SO4Raw material is mixed.
In foregoing concrete regenerating powder microdilatancy eco-cement, calculate by weight, in the raw material of microdilatancy eco-cement
In, including 40~60 parts of concrete regenerating powder, cement is 15~40 points, and manganese slag is 4~15 parts, and gypsum is 3~5 parts, and lime is 4
~12 parts, silica flour is 4~12 parts, MgO/CaCl2For 1~5 part, Na2SO41~2 part.
In foregoing concrete regenerating powder microdilatancy eco-cement, it is preferred that when 32.5 grades of microdilatancy eco-cements of preparation
When, its cement is calculated by weight using 52.5 grades of Portland cements, and the raw material of its microdilatancy eco-cement includes concrete
40~60 parts of powder is regenerated, cement is 25~40 points, and manganese slag is 4~10 parts, and gypsum is 3~5 parts, and lime is 6~12 parts, and silica flour is
4~10 parts, MgO/CaCl2For 3~5 parts, Na2SO41~2 part.
In foregoing concrete regenerating powder microdilatancy eco-cement, it is preferred that when preparation 32.5 grades and 42.5 grades of microdilatancies
During eco-cement, its cement is calculated by weight using 52.5 grades of clinkers, and the raw material of its microdilatancy eco-cement includes concrete again
40~60 parts of fecula, cement be 25~40 points, manganese slag be 6~14 parts, gypsum be 3~5 parts, lime be 4~8 parts, silica flour be 4~
12 parts, MgO/CaCl2For 1~3 part, Na2SO41~2 part.
In foregoing concrete regenerating powder microdilatancy eco-cement, it is preferred that when 32.5 grades, 42.5 grades and 52.5 grades of preparation
During microdilatancy eco-cement, its cement is calculated by weight using 62.5 grades of clinkers, and the raw material of its microdilatancy eco-cement includes mixing
Solidifying 40~60 parts of powder of soil regeneration, cement is 15~40 points, and manganese slag is 4~15 parts, and gypsum is 3~5 parts, and lime is 4~8 parts, silicon
Powder is 4~12 parts, MgO/CaCl2For 1~3 part, Na2SO41~2 part.
A kind of preparation method of such as concrete regenerating powder microdilatancy eco-cement, comprises the following steps：
1) using C20~C50 discarded concrete, crush, reject stone, grinding mortar particle with crush after it is thin
Powder, makes its size be less than 0.075mm.
2) levigate concrete regenerating powder in 1) is placed in Muffle furnace and calcined, 450 DEG C -650 DEG C, soaking time 4.5-
6.6h (most preferably calcining heat is 600 DEG C, and the time is 6h), it is quick air-cooled standby in 15min after calcining.
3) concrete regenerating powder, manganese slag, gypsum, silica flour, lime, MgO/CaCl after cement, calcining are weighed2And Na2SO4
Raw material is simultaneously mixed to form compound, tests its normal consistency, and by compound：Water：Sand=450:225:1350 shaping mortar examinations
Part.
4) mortar specimen in 3) is stripped, is conserved in fog room to regulation age and test its 3d, 7d and 28d pressure resistance
Degree and rupture strength.
5) the normal consistency shaping pressure in pressing 3) steams test specimen, tests its expansion rate.
In the preparation method of foregoing concrete regenerating powder microdilatancy eco-cement, step 4) mortar specimen after the demoulding supports
Guard strip part is：20 DEG C ± 1 DEG C of temperature, humidity RH>95%.
In the preparation method of foregoing concrete regenerating powder microdilatancy eco-cement, step 5) measure mortar specimen after the demoulding
Original length, pressure tests the swell value of test specimen, and then tests out expansion rate after steaming.
Compared with prior art, the present invention makes full use of existing discarded concrete and manganese slag, and passes through appropriate tune
Other raw materials are added with ratio, an ecology and the cement with microdilatancy effect is formed, can reach and make full use of solid
Pollutant, make it that the cement that is made is up to state standards intensity, with very high environmental benefit and economic benefit again.
Embodiment
It is further to the present invention below to describe in detail, but not as any limitation of the invention.
Embodiment one：Prepare 32.5 grades of concrete regenerating powder microdilatancy eco-cements, the weight proportion of each raw material：Coagulation
Soil 40~60 parts of powder of regeneration, cement is 25~40 points, and manganese slag is 4~10 parts, and gypsum is 3~5 parts, and lime is 6~12 parts, silica flour
For 4~10 parts, MgO/CaCl2 is 3~5 parts, and 1~2 part of Na2SO4, wherein cement are 52.5 grades of Portland cements.
Comprise the following steps that：
1) using C20~C50 discarded concrete, crush, reject stone, grinding mortar particle and it is broken after fine powder,
Its size is set to be less than 0.075mm.
2) levigate concrete regenerating powder in 1) is placed in Muffle furnace and calcined, it is 600 DEG C to forge temperature, soaking time 6h,
It is quick air-cooled standby in 15min after calcining.
3) manganese slag, gypsum, silica flour, lime are in 105 DEG C of dry for standby.
4) compound is weighed, its normal consistency is tested, and by compound：Water：Sand=450:225:1350 shaping mortar examinations
Part (40mm × 40mm × 160mm).The shaping time-division pours for two layers, and every layer of jumping table vibrates 60 times, scrapes off unnecessary mortar and polishes, supporting
Form removal after 1d is conserved in protecting box, maintenance in fog room is put into afterwards, and (temperature is 20 DEG C ± 1 DEG C, humidity RH>95%) to regulation age
Phase tests its 3d, 7d and 28d compression strength and rupture strength.Using consumptive use of water normal consistence shaping test piece (25mm × 25mm
× 280mm), test its expansibility at high pressure curing.
When cement is 25 parts, when concrete regenerating powder is 60 parts, mortar 3d, 7d and 28d compression strength is 18.9MPa,
30.1MPa and 36.8MPa；Mortar 3d, 7d and 28d compression strength are 3.5MPa, 4.4MPa and 5.3MPa, and expansibility at high pressure curing is
0.093%.When cement is 40 parts, when concrete regenerating powder is 50 parts, mortar 3d, 7d and 28d compression strength is 25.6MPa,
35.8MPa and 40.2MPa；Mortar 3d, 7d and 28d compression strength are 3.9MPa, 4.9MPa and 5.6MPa, and expansibility at high pressure curing is
0.105%.Therefore, above two proportioning meets the requirement of 32.5 grades of Portland cement, and with certain expansion effect.
Embodiment two：Prepare 32.5 grades and 42.5 grades of concrete regenerating powder microdilatancy eco-cements, the weight of each raw material
Proportioning：40~60 parts of concrete regenerating powder, cement be 25~40 points, manganese slag be 6~14 parts, gypsum be 3~5 parts, lime be 4~
8 parts, silica flour is 4~12 parts, and MgO/CaCl2 is 1~3 part, and 1~2 part of Na2SO4, wherein cement are 52.5 grades of clinkers.
Comprise the following steps that：
1) using C20~C50 discarded concrete, crush, reject stone, grinding mortar particle and it is broken after fine powder,
Its size is set to be less than 0.075mm.
2) levigate concrete regenerating powder in 1) is placed in Muffle furnace and calcined, it is 600 DEG C to forge temperature, soaking time 6h,
It is quick air-cooled standby in 15min after calcining.
3) manganese slag, gypsum, silica flour, lime are in 105 DEG C of dry for standby.
4) compound is weighed, its normal consistency is tested, and by compound：Water：Sand=450:225:1350 shaping mortar examinations
Part (40mm × 40mm × 160mm).The shaping time-division pours for two layers, and every layer of jumping table vibrates 60 times, scrapes off unnecessary mortar and polishes, supporting
Form removal after 1d is conserved in protecting box, maintenance in fog room is put into afterwards, and (temperature is 20 DEG C ± 1 DEG C, humidity RH>95%) to regulation age
Phase tests its 3d, 7d and 28d compression strength and rupture strength.Using consumptive use of water normal consistence shaping test piece (25mm × 25mm
× 280mm), test its expansibility at high pressure curing.
When cement is 25 parts, when concrete regenerating powder is 60 parts, mortar 3d, 7d and 28d compression strength is 22.7MPa,
32.1MPa and 39.9MPa；Mortar 3d, 7d and 28d rupture strength are 3.9MPa, 5.1MPa and 6.2MPa, and expansibility at high pressure curing is
0.103%.When cement is 40 parts, when concrete regenerating powder is 50 parts, mortar 3d, 7d and 28d compression strength is 27.1MPa,
35.6MPa and 45.8MPa；Mortar 3d, 7d and 28d rupture strength are 4.2MPa, 5.3MPa and 6.6MPa, and expansibility at high pressure curing is
0.118%.Therefore, above two proportioning meets the requirement of 32.5 grades and 42.5 grades of Portland cement, and has necessarily
Expansion effect.
Embodiment three：Prepare 32.5 grades, 42.5 grades and 52.5 grades concrete regenerating powder microdilatancy eco-cements, each raw material
Weight proportion：40~60 parts of concrete regenerating powder, cement is 15~40 points, and manganese slag is 4~15 parts, and gypsum is 3~5 parts, stone
Ash is 4~8 parts, and silica flour is 4~12 parts, and MgO/CaCl2 is 1~3 part, and 1~2 part of Na2SO4, wherein cement are 62.5 grades ripe
Material.
Comprise the following steps that：
1) using C20~C50 discarded concrete, crush, reject stone, grinding mortar particle and it is broken after fine powder,
Its size is set to be less than 0.075mm.
2) levigate concrete regenerating powder in 1) is placed in Muffle furnace and calcined, it is 600 DEG C to forge temperature, soaking time 6h,
It is quick air-cooled standby in 15min after calcining.
3) manganese slag, gypsum, silica flour, lime are in 105 DEG C of dry for standby.
4) compound is weighed, its normal consistency is tested, and by compound：Water：Sand=450:225:1350 shaping mortar examinations
Part (40mm × 40mm × 160mm).The shaping time-division pours for two layers, and every layer of jumping table vibrates 60 times, scrapes off unnecessary mortar and polishes, supporting
Form removal after 1d is conserved in protecting box, maintenance in fog room is put into afterwards, and (temperature is 20 DEG C ± 1 DEG C, humidity RH>95%) to regulation age
Phase tests its 3d, 7d and 28d compression strength and rupture strength.Using consumptive use of water normal consistence shaping test piece (25mm × 25mm
× 280mm), test its expansibility at high pressure curing.
When cement is 15 parts, when concrete regenerating powder is 60 parts, mortar 3d, 7d and 28d compression strength is 17.8MPa,
25.6MPa and 35.7MPa；Mortar 3d, 7d and 28d rupture strength are 3.1MPa, 4.2MPa and 5.1MPa, and expansibility at high pressure curing is
0.086%.When cement is 25 parts, when concrete regenerating powder is 60 parts, mortar 3d, 7d and 28d compression strength is 19.1MPa,
29.3MPa and 44.1MPa；Mortar 3d, 7d and 28d rupture strength are 3.3MPa, 4.6MPa and 5.6MPa, and expansibility at high pressure curing is
0.109%.When cement is 40 parts, when concrete regenerating powder is 50 parts, mortar 3d, 7d and 28d compression strength is 25.9MPa,
40.3MPa and 53.8MPa；Mortar 3d, 7d and 28d rupture strength are 4.0MPa, 5.5MPa and 7.1MPa, and expansibility at high pressure curing is
0.133%.Therefore, above two proportioning meets the requirement of 32.5 grades, 42.5 grades and 52.5 grades of Portland cement, and has
Certain expansion effect.
In summary, the basic principles, principal features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Effect thing is defined.
Claims (8)
1. a kind of concrete regenerating powder microdilatancy eco-cement, it is characterised in that：The microdilatancy eco-cement is by concrete regenerating
Powder, manganese slag, gypsum, silica flour, lime, MgO/CaCl2And Na2SO4Raw material is mixed.
2. concrete regenerating powder microdilatancy eco-cement according to claim 1, it is characterised in that：Calculate by weight,
In the raw material of microdilatancy eco-cement, including 40~60 parts of concrete regenerating powder, cement is 15~40 points, and manganese slag is 4~15 parts,
Gypsum is 3~5 parts, and lime is 4~12 parts, and silica flour is 4~12 parts, MgO/CaCl2For 1~5 part, Na2SO41~2 part.
3. concrete regenerating powder microdilatancy eco-cement according to claim 2, it is characterised in that：It is preferred that, work as preparation
During 32.5 grades of microdilatancy eco-cements, its cement is calculated by weight using 52.5 grades of Portland cements, and its microdilatancy is ecological
The raw material of cement includes 40~60 parts of concrete regenerating powder, and cement is 25~40 points, and manganese slag is 4~10 parts, and gypsum is 3~5 parts,
Lime is 6~12 parts, and silica flour is 4~10 parts, MgO/CaCl2For 3~5 parts, Na2SO41~2 part.
4. concrete regenerating powder microdilatancy eco-cement according to claim 2, it is characterised in that：It is preferred that, work as preparation
32.5 grades and during 42.5 grades of microdilatancy eco-cements, its cement is calculated, its microdilatancy ecological water by weight using 52.5 grades of clinkers
The raw material of mud includes 40~60 parts of concrete regenerating powder, and cement is 25~40 points, and manganese slag is 6~14 parts, and gypsum is 3~5 parts, stone
Ash is 4~8 parts, and silica flour is 4~12 parts, MgO/CaCl2For 1~3 part, Na2SO41~2 part.
5. concrete regenerating powder microdilatancy eco-cement according to claim 2, it is characterised in that：It is preferred that, work as preparation
32.5 grades, 42.5 grades and during 52.5 grades of microdilatancy eco-cements, its cement is calculated, its is micro- swollen by weight using 62.5 grades of clinkers
The raw material of swollen eco-cement includes 40~60 parts of concrete regenerating powder, and cement is 15~40 points, and manganese slag is 4~15 parts, and gypsum is 3
~5 parts, lime is 4~8 parts, and silica flour is 4~12 parts, MgO/CaCl2For 1~3 part, Na2SO41~2 part.
6. a kind of preparation method of concrete regenerating powder microdilatancy eco-cement as claimed in claim 1 or 2, it is characterised in that bag
Include following steps：
1) using C20~C50 discarded concrete, crush, reject stone, grinding mortar particle with crush after fine powder,
Its size is set to be less than 0.075mm.
2) levigate concrete regenerating powder in 1) is placed in Muffle furnace and calcined, calcining heat is 450 DEG C -650 DEG C, soaking time
4.5-6.6h, after calcining, in 15min it is quick it is air-cooled it is standby (.
3) concrete regenerating powder, manganese slag, gypsum, silica flour, lime, MgO/CaCl after cement, calcining are weighed2And Na2SO4Raw material
And compound is mixed to form, its normal consistency is tested, and by compound：Water：Sand=450:225:1350 shaping mortar specimens.
4) mortar specimen in 3) is stripped, conserved in fog room to regulation age test its 3d, 7d and 28d compression strength and
Rupture strength.
5) the normal consistency shaping pressure in pressing 3) steams test specimen, tests its expansion rate.
7. the preparation method of concrete regenerating powder microdilatancy eco-cement according to claim 6, it is characterised in that：Step
4) the mortar specimen curing condition after the demoulding is：20 DEG C ± 1 DEG C of temperature, humidity RH>95%.
8. the preparation method of concrete regenerating powder microdilatancy eco-cement according to claim 6, it is characterised in that：Step
5) original length of mortar specimen after the demoulding is measured, pressure tests the swell value of test specimen after steaming, and then tests out expansion rate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105202A (en) * | 2021-04-15 | 2021-07-13 | 武汉中科固废资源产业技术研究院有限公司 | Full-solid waste material and preparation method and application thereof |
| CN114956642A (en) * | 2022-05-12 | 2022-08-30 | 江苏华泰路桥建设集团有限公司 | Composite expanding agent based on regenerated micro powder and preparation method thereof |
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| CN104446042A (en) * | 2014-11-06 | 2015-03-25 | 西安工程大学 | Method for preparing recycled cement by using waste concrete |
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| CN114956642A (en) * | 2022-05-12 | 2022-08-30 | 江苏华泰路桥建设集团有限公司 | Composite expanding agent based on regenerated micro powder and preparation method thereof |
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