CN113582608A - Low-carbon cement and preparation method thereof - Google Patents
Low-carbon cement and preparation method thereof Download PDFInfo
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- CN113582608A CN113582608A CN202110754361.5A CN202110754361A CN113582608A CN 113582608 A CN113582608 A CN 113582608A CN 202110754361 A CN202110754361 A CN 202110754361A CN 113582608 A CN113582608 A CN 113582608A
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- 239000004568 cement Substances 0.000 title claims abstract description 72
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000010802 sludge Substances 0.000 claims abstract description 51
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000010881 fly ash Substances 0.000 claims abstract description 32
- 239000011575 calcium Substances 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- 239000011398 Portland cement Substances 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000004580 weight loss Effects 0.000 claims description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 230000009919 sequestration Effects 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000001569 carbon dioxide Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 235000019738 Limestone Nutrition 0.000 description 4
- 239000006028 limestone Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000002734 clay mineral Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
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
- 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
- C04B18/0418—Wet materials, e.g. slurries
-
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B20/04—Heat 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
- 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
- C04B28/08—Slag cements
-
- 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 relates to low-carbon cement and a preparation method thereof, wherein the low-carbon cement comprises, by weight, 200-500 parts of cement, 300-600 parts of fly ash and 300-900 parts of calcined sludge. Compared with the traditional cement, the low-carbon cement has the advantages of low carbon, environmental protection, economy and the like, the performance of the low-carbon cement is equal to that of the traditional cement, the use amount of cement clinker is reduced by more than 50%, the carbon emission is reduced by more than 30%, and the produced low-carbon cement has the characteristics of high quality and long service life and can be used as structural materials of buildings, pavements and the like.
Description
Technical Field
The invention relates to the field of building materials, in particular to low-carbon cement and a preparation method thereof.
Background
The traditional cement is made up by using limestone and clay as main raw materials, through the processes of crushing, proportioning and grinding to obtain raw material, then feeding the raw material into cement kiln, calcining to obtain clinker, then adding proper quantity of mineral admixture into the clinker and grinding so as to obtain the invented product. Since limestone can generate a large amount of carbon dioxide emission in the calcining process, and has certain influence on the environment, researches show that carbon dioxide emitted in cement production accounts for 5% of the global carbon emission.
Disclosure of Invention
The invention provides low-carbon cement and a preparation method thereof, which aim to reduce carbon dioxide emission in the cement production process and reduce the cement production cost. The low-carbon cement is prepared by mixing cement and various admixtures, so that the performance requirements are met, and the cement production cost and the carbon dioxide emission are remarkably reduced.
In order to achieve the purpose, the invention adopts the technical scheme that:
the low-carbon cement comprises, by weight, 200-500 parts of cement, 300-600 parts of fly ash and 300-900 parts of calcined sludge.
Further, the cement is selected from one or more of portland cement, ordinary portland cement, portland slag cement, pozzolanic portland cement, fly ash portland cement, and composite portland cement.
Further, the fly ash is selected from high-calcium three-grade fly ash after industrial carbon sequestration, and the calcium content is 10% -30%.
Further, the coal ash is selected from high-calcium three-grade coal ash after industrial carbon fixation, and the carbon fixation rate is 30% -95%.
Further, the fly ash comprises the following chemical components in percentage by weight: 33.29% SiO2，12.36% Al2O3，19.21% CaO，16.38% CO2，6.81% Na2O and 8.52% Fe2O3The balance being the rest.
Further, the preparation process of the calcined sludge comprises the following steps: firstly, drying the sludge at 60-105 ℃ until the weight loss rate is lower than 0.5%, then heating from room temperature to 500-900 ℃ at a speed of 5-15 ℃/min, and preserving heat for 1-4 h.
Further, the calcined sludge comprises the following chemical components in weight ratio: 54.8% SiO2，16.2% Al2O312.3% CaO, 3.2% MgO and 8.4% Fe2O3The balance being the rest.
Further, the organic matter removal rate of the calcined sludge is 95% -99.99%.
The preparation method of the low-carbon cement comprises the following steps:
(1) selecting three-stage fly ash with 10% -30% of calcium content for carbon fixation, wherein the carbon fixation rate is 30% -95%;
(2) drying the sludge in a drying oven at the temperature of 60-105 ℃, and weighing every 1-2 hours until the weight loss rate is lower than 0.5%;
(3) ball milling and dispersing the dried sludge for 5-30 min, heating the dried sludge to 500-900 ℃ from room temperature at a speed of 5-15 ℃/min in a high temperature furnace, and preserving heat for 1-4 h;
(4) taking out the sludge after heat preservation, rapidly cooling at room temperature, and placing the sludge in a ball mill for ball milling and dispersing for 5-15 min;
(5) mixing cement, the industrial carbon sequestration tertiary fly ash and calcined sludge according to the weight portion.
Compared with the prior art, the invention has the beneficial effects that:
1. the low-carbon cement is prepared by mixing cement and various admixtures, so that the performance requirements are met, the production cost and carbon dioxide emission are obviously reduced, the low-carbon cement can be used as structural materials of buildings, pavements and the like, the quality of the cement can be obviously improved, the service life of the cement material is greatly prolonged, and the low-carbon cement has a series of outstanding environmental and cost advantages.
2. The fly ash used in the invention belongs to high-calcium third-grade ash, belongs to common solid waste, has higher alkalinity, and can obviously reduce the alkalinity of the fly ash after carbon fixation so as to achieve the purpose of carbon neutralization. A certain amount of CaCO is generated in the fly ash after carbon sequestration3The limestone cement can be used as a substitute of limestone, so that the cost of cement is remarkably reduced, and the reduction and resource utilization of solid wastes are realized.
3. The sludge used by the invention is from water storage reservoirs such as ponds, lakes and the like, and belongs to common solid waste. The main chemical components of the sludge are calcium oxide, aluminum oxide, silicon dioxide and iron oxide, and the mineral phase components of the sludge contain 20-30% of clay minerals and can be used as low-grade clay. After calcination at a certain temperature, structural water in a clay mineral phase in the sludge is dehydrated, so that a crystal structure is damaged, the clay mineral phase is converted into amorphous aluminosilicate, the volcanic ash activity is better, the aluminosilicate can be used as a substitute for calcined clay, the cost of cement is obviously reduced, the reduction and the resource utilization of solid waste are realized, and better environmental benefits are brought.
4. The low-carbon cement is prepared by mixing the cement and various admixtures, so that the service life of the cement can be obviously prolonged, the consumption of cement clinker and the emission of carbon dioxide are obviously reduced, and the cost is greatly reduced.
Drawings
FIG. 1 shows the activity index of low carbon cement at different sludge fractions;
FIG. 2 shows the activity index of low-carbon cement under different three-stage fly ash parts conditions;
FIG. 3 is the activity index of low-carbon cement under different portland cement parts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples, the fly ash comprises the following chemical components in weight ratio: 33.29% SiO2，12.36% Al2O3，19.21% CaO，16.38% CO2，6.81% Na2O and 8.52% Fe2O3The balance being the rest. The sludge is from a reservoir of Handan Yue City in Hebei, the calcined sludge adopts a physical treatment method with different parameters without changing the chemical composition, and the calcined sludge comprises the following chemical components in percentage by weight: 54.8% SiO2，16.2% Al2O312.3% CaO, 3.2% MgO and 8.4% Fe2O3The balance being the rest.
Example 1
The preparation method of the low-carbon cement comprises the following steps:
(1) selecting three-grade fly ash with 10 percent of calcium content for carbon fixation, wherein the carbon fixation rate is 30 percent;
(2) drying the sludge in a 60 ℃ oven for 12 hours, and weighing every 2 hours until the weight loss rate is lower than 0.5%;
(3) ball-milling and dispersing the dried sludge for 15min, heating the dried sludge to 600 ℃ from room temperature at a speed of 5 ℃/min in a high-temperature furnace, and preserving the heat for 4 h;
(4) taking out the sludge after heat preservation, rapidly cooling at room temperature, and placing in a ball mill for ball milling and dispersing for 5 min;
(5) 200 parts of cement, 300 parts of industrial carbon-fixed three-stage fly ash and 300 parts of calcined sludge are weighed and mixed.
Examples 2 to 4
The difference from example 1 is that in examples 2 to 4, the calcined sludge was: 500 parts, 700 parts and 900 parts.
The results of measuring the activity index of the low carbon cement prepared in examples 1 to 4 are shown in FIG. 1. As can be seen from FIG. 1, when the mixing amount of cement and tertiary fly ash is constant, the activity index of the low-carbon cement rises first and then falls along with the increase of the mixing amount of the sludge, and the optimum activity index is achieved when the mixing amount is 50 wt%.
Example 5
The preparation method of the low-carbon cement comprises the following steps:
(1) selecting three-grade fly ash with 20 percent of calcium content for carbon fixation, wherein the carbon fixation rate is 60 percent;
(2) drying the sludge in a drying oven at 90 ℃ for 8 hours, and weighing every 2 hours until the weight loss rate is lower than 0.5%;
(3) ball-milling and dispersing the dried sludge for 20min, heating the dried sludge to 750 ℃ from room temperature at a speed of 10 ℃/min in a high-temperature furnace, and preserving heat for 2 h;
(4) taking out the sludge after heat preservation, rapidly cooling at room temperature, and placing in a ball mill for ball milling and dispersing for 10 min;
(5) weighing 300 parts of cement, 300 parts of industrial carbon-fixed three-stage fly ash and 300 parts of calcined sludge, and mixing the three materials.
Examples 6 to 8
The method is the same as the embodiment 5, and is different from the embodiments 6 to 8 in that the parts of the industrial fixed carbon three-stage fly ash are respectively as follows: 400 parts, 500 parts and 600 parts.
The results of measuring the activity index of the low carbon cement prepared in examples 5 to 8 are shown in FIG. 2. As can be seen from FIG. 2, when the amount of the cement and the sludge is constant, the activity index of the low-carbon cement is reduced along with the increase of the amount of the third-level fly ash.
Example 9
The preparation method of the low-carbon cement comprises the following steps:
(1) selecting three-grade fly ash with 30 percent of calcium content for carbon fixation, wherein the carbon fixation rate is 95 percent;
(2) drying the sludge in an oven at 105 ℃ for 6 hours, and weighing every 1 hour until the weight loss rate is lower than 0.5%;
(3) ball-milling and dispersing the dried sludge for 30min, heating the dried sludge to 900 ℃ from room temperature at a speed of 15 ℃/min in a high-temperature furnace, and preserving the heat for 1 h;
(4) taking out the sludge after heat preservation, rapidly cooling at room temperature, and placing in a ball mill for ball milling and dispersing for 15 min;
(5) 200 parts of cement, 300 parts of industrial carbon-fixed three-stage fly ash and 400 parts of calcined sludge are weighed and mixed.
Examples 10 to 12
The cement compositions of examples 10 to 12 were the same as in example 9, except that the cement compositions of examples 10 to 12 were: 300 parts, 400 parts and 500 parts.
The results of measuring the activity index of the low carbon cement prepared in examples 9 to 12 are shown in FIG. 3. As can be seen from FIG. 3, when the amount of the fly ash and the sludge is constant, the activity index of the low-carbon cement increases with the increase of the amount of the sludge.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The low-carbon cement is characterized by comprising, by weight, 200-500 parts of cement, 300-600 parts of fly ash and 300-900 parts of calcined sludge.
2. The low carbon cement of claim 1, wherein the cement is selected from one or more of portland cement, portland slag cement, pozzolanic portland cement, fly ash portland cement, and composite portland cement.
3. The low carbon cement of claim 1, wherein the fly ash is selected from high calcium tertiary fly ash after industrial carbon sequestration, having a calcium content of 10% to 30%.
4. The low-carbon cement of claim 1, wherein the carbon fixation rate of the fly ash selected from the high-calcium three-grade fly ash after industrial carbon fixation is 30-95%.
5. The low carbon cement of claim 1, wherein the fly ash comprises the following chemical components in weight ratio: 33.29% SiO2，12.36% Al2O3，19.21% CaO，16.38% CO2，6.81% Na2O and 8.52% Fe2O3The balance being the rest.
6. The low carbon cement of claim 1, wherein the calcined sludge is prepared by: firstly, drying the sludge at 60-105 ℃ until the weight loss rate is lower than 0.5%, then heating from room temperature to 500-900 ℃ at a speed of 5-15 ℃/min, and preserving heat for 1-4 h.
7. The low carbon cement of claim 1, wherein the sludge comprises the following chemical components in weight ratio: 54.8% SiO2，16.2% Al2O312.3% CaO, 3.2% MgO and 8.4% Fe2O3The balance being。
8. The low carbon cement of claim 1, wherein said calcined sludge has an organic matter removal rate of 95% or greater.
9. The preparation method of the low-carbon cement is characterized by comprising the following steps:
(1) selecting three-stage fly ash with 10% -30% of calcium content for carbon fixation, wherein the carbon fixation rate is 30% -95%;
(2) drying the sludge in a drying oven at the temperature of 60-105 ℃, and weighing every 1-2 hours until the weight loss rate is lower than 0.5%;
(3) ball milling and dispersing the dried sludge for 5-30 min, heating the dried sludge to 500-900 ℃ from room temperature at a speed of 5-15 ℃/min in a high temperature furnace, and preserving heat for 1-4 h;
(4) taking out the sludge after heat preservation, rapidly cooling at room temperature, and placing the sludge in a ball mill for ball milling and dispersing for 5-15 min;
(5) mixing cement, the industrial carbon sequestration tertiary fly ash and calcined sludge according to the weight portion.
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| CN114409289A (en) * | 2022-03-09 | 2022-04-29 | 江西绿科新型建材有限公司 | Carbon sequestration system and method for reinforcing recycled aggregate and recycled brick |
| CN114956617A (en) * | 2022-06-28 | 2022-08-30 | 河南郑大建筑材料有限公司 | Low-carbon emission cement, preparation method thereof and concrete |
| CN115893917A (en) * | 2023-02-15 | 2023-04-04 | 河北工业大学 | Concrete for mixing seawater and fixing chloride ions in seawater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114409289A (en) * | 2022-03-09 | 2022-04-29 | 江西绿科新型建材有限公司 | Carbon sequestration system and method for reinforcing recycled aggregate and recycled brick |
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| CN115893917A (en) * | 2023-02-15 | 2023-04-04 | 河北工业大学 | Concrete for mixing seawater and fixing chloride ions in seawater |
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Application publication date: 20211102 |