CN101935179A - Composite mineral additive for high-strength and high-performance concrete and method for preparing concrete - Google Patents
Composite mineral additive for high-strength and high-performance concrete and method for preparing concrete Download PDFInfo
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- CN101935179A CN101935179A CN2010102566218A CN201010256621A CN101935179A CN 101935179 A CN101935179 A CN 101935179A CN 2010102566218 A CN2010102566218 A CN 2010102566218A CN 201010256621 A CN201010256621 A CN 201010256621A CN 101935179 A CN101935179 A CN 101935179A
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- 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
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a composite mineral additive for high-strength and high-performance concrete and a method for preparing concrete. The composite mineral additive for the high-strength and high-performance concrete comprises superfine steel slag micro powder as a core material as well as hemihydrate desulfurization gypsum, II-level pulverized fuel ash and mineral slag. The preparation method of the composite mineral additive comprises the following steps of: placing raw materials in a mixer, and then mechanically stirring and uniformly mixing to form the composite mineral additive for the high-strength and high-performance concrete. The composite mineral additive for the high-strength and high-performance concrete, obtained in the method, has high early-stage strength in 3 days, the activity index is not less than 80%, and the activity index in 28 days is not less than S95%, which is higher than the standard of the issued state and local like products; and when used for preparing the concrete, the composite mineral additive can equivalently replace more than 60% of 52.5-level ordinary Portland cement, and meanwhile fragments generated by producing above 75% of broken stones can also be utilized for replacing natural sand, thereby low-carbon concrete having good durability and meeting the circulated economic requirement is produced.
Description
Technical field
The present invention relates to a kind of high-strength high-performance concrete with compound mineral admixture and prepare concrete method, belong to building material technical field.
Background technology
In mineral admixture for high-strength high-performance concrete (GB/T18736-2002) standard that country has issued ground slag powder is only arranged, fine-ground fly-ash, the monomer technological standard of levigate zeolite powder and silicon ash does not contain the two or more compound mineral admixture technological standard of steel-making slag powder and desulfurated plaster.National in addition its first grade the key technical indexes: specific surface area 〉=400m of the steel-making slag powder that is used for cement and concrete (GB/T20491-2006) that has issued
2/ kg; Activity index 7 days 〉=65%; 28 days 〉=80%; The clad steel ground-slag is formed by five kinds of mineral admixture Compound Machining such as slag powders, flyash, silicon ash, natural volcanic ash and steel-making slag powder among the steel-making slag powder concrete utilisation technology rules CDG/TJ08-2013-2007 of Shanghai City promulgation, steel-making slag powder content 〉=50% wherein, the key technical indexes of one-level clad steel ground-slag: specific surface area 〉=360m
2/ kg; Activity index 7 days 〉=75%; 28 days 〉=90%, the specific surface area of the two, activity index are all on the low side.
With specific surface area 〉=600m
2The superfine steel slag micropowder of/kg prepare concrete as mineral additive or when becoming to be grouped into compound mineral admixture for four kinds and prepare concrete and design concrete mix as core material and half water desulfurated plaster, II level flyash and slag powders with superfine steel slag micropowder with half water desulfurated plaster, superfine steel slag micropowder, the chip quality addition of the quality sum of flyash and alternative natural sand accounts for the related application technology of concrete total mass more than 30% and there is no report.
Summary of the invention
The present invention proposes to form high-strength high-performance concrete compound mineral admixture as core material by half water desulfurated plaster, II level flyash and four kinds of materials of S95 grade slag powder compound (slag powders weight ratio≤45%) with superfine steel slag micropowder.This high-strength high-performance concrete with powerful feature index morning of compound mineral admixture is: 3 days activity index 〉=80%; 7 days activity index 〉=85%, 28 day activity index 〉=95% apparently higher than country that has issued and local like product standard, are used to prepare normal concrete, mass concrete, high-strength concrete, prestressed concrete and concrete prefabricated element.
Technical scheme of the present invention
A kind of high-strength high-performance concrete compound mineral admixture
A kind of high-strength high-performance concrete compound mineral admixture is promptly formed as core material and half water desulfurated plaster, II level flyash and four kinds of starting material of S95 grade slag powder with superfine steel slag micropowder, and the weight percent of each raw material is:
Superfine steel slag micropowder 10-15%
Half water desulfurated plaster 2.5-5%
II level flyash 35-50%
S95 grade slag powder 37.5-45%
Wherein said superfine steel slag micropowder is converter or the electric furnace slag that meets YB/T 022 standard code, grinding after iron removal by magnetic separation is handled, specific surface area 〉=600m
2/ kg accounts for more than 90% of total mass less than the superfine steel slag micropowder of 30 μ m particle diameters, and metal Ferrum content≤0.5% allows the cement grinding process admixture that adds≤1% slag quality, meets the JC/T667 standard during grinding;
Described half water desulfurated plaster is β-CaSO
41/2H
2O is that the coal-fired plant flue gas desulphurization gypsum calcination forms;
Described II level flyash is to meet the flyash that the GB/T1596-2005 national standard is used for cement and concrete, and its key technical indexes is: fineness (45 μ m square hole sieves tail over)≤25%; Loss on ignition≤8%; Water demand ratio≤105%; Stability (the Lei Shi folder boils and boils back increase distance (mm))≤5.0; 28 days intensity activity index 〉=70%;
Described S95 grade slag powder is the slag powders that meets the GB/T18046-2008 national standard, and its key technical indexes is: density (g/cm
3) 〉=2.8, specific surface area (m
2/ kg) 〉=400,7 day activity index 〉=75%, 28 day activity index 〉=95%.
A kind of high-strength high-performance concrete compound method of compound mineral admixture
A kind of aforesaid high-strength high-performance concrete preparation method of compound mineral admixture, be about to superfine steel slag micropowder, half water desulfurated plaster, II level flyash and four kinds of starting material of S95 grade slag powder in proportion after the weighing, putting into mixing machine after mechanical stirring mixes promptly becomes the high-strength high-performance concrete compound mineral admixture.Powerful feature index morning of the high-strength and high performance compound mineral admixture of gained is: 3 days activity index 〉=80%, 7 day activity index 〉=85%; 28 days activity index 〉=95%; Specific surface area 〉=450m
2/ kg.
High-strength high-performance concrete prepares the method for normal concrete with compound mineral admixture
By " common concrete proportioning technical regulation " (JGJ55) during design mixture proportion:
With high-strength high-performance concrete with compound mineral admixture equivalent substitution 52.5 grades of ordinary Portland cements 〉=more than 60%;
The chip that fine aggregate produces in producing with rubble in the concrete substitutes natural sand 75-90%, and the fine aggregate quality meets the standard of artificial sand among the GB/T14684-2001;
The kind of admixture is with not mix high-strength high-performance concrete identical when the compound mineral admixture;
High-strength high-performance concrete half water desulfurated plaster in the compound mineral admixture, steel-making slag powder, the chip quality addition of the quality sum of flyash and alternative natural sand accounts for the concrete total mass more than 30%;
Wherein churning time is identical when not mixing high-strength high-performance concrete with compound mineral admixture during concrete production, and all the other technologies are constant.
Above-mentioned high-strength high-performance concrete also can be used for preparing fields such as mass concrete, high-strength concrete, prestressed concrete and concrete prefabricated element with compound mineral admixture.
Beneficial effect of the present invention
The high-strength high-performance concrete of gained of the present invention compound mineral admixture early strength height, 3 days activity index 〉=80%, and 28 days activity index 〉=S95%, alternative 52.5 grades of ordinary Portland cement consumptions are more than 60% when the preparation normal concrete.Can also obviously reduce concrete drying and early-age shrinkage crack because of when preparing normal concrete, having mixed half water desulfurated plaster, with the normal concrete of high-strength high-performance concrete of the present invention with the compound mineral admixture preparation, also because of being mixed with the core material superfine steel slag micropowder so at hydration heat, anti-folding, the concrete of all mixing system than " two mixing "-(slag powders and flyash) on impervious and these technical indicators relevant with endurance performance of concrete of wear resistance has more advantage, and but the normal concrete of mixing system with the present invention also can utilize the chip that produces in the 75% above rubble production to substitute natural sand at the cement consumption of equivalent substitution more than 60% simultaneously, each that produce cube concrete can utilize industrial solid castoff (desulfurated plaster like this, steel-making slag powder, flyash, chip) reach more than 30% (weight ratio), it had not only met the index request that recycling economy required but also can satisfy the tax-free request for product of country.
Embodiment
Below by embodiment and in conjunction with subordinate list the present invention is further set forth, but do not limit the present invention.The measuring method of mineral admixture for high-strength high-performance concrete activity index
The active method of inspection of the mineral admixture for high-strength high-performance concrete of having issued by GB/T18736-2002 country is tested, and represents with the ratio of (3,7,28) sky ultimate compression strength of (3,7,28) sky ultimate compression strength of the mixture of 52.5 grades of ordinary Portland cements of compound mineral admixture and 70% (quality molecules) and 52.5 grades of ordinary Portland cements with 30% (quality molecules) high-strength high-performance concrete:
Embodiment 1
Get superfine steel slag micropowder (15%) 20.93g, half water desulfurated plaster (5%) 6.07g, II level flyash (35%) 47.25g, S95 grade slag powder (45%) 60.75g, after mixing, promptly make a kind of high-strength high-performance concrete compound mineral admixture (numbering 1), test with the active method of inspection of compound mineral admixture by the high-strength high-performance concrete that GB/T18736-2002 country has issued, measure the ultimate compression strength of its 3d, 7d, 28d respectively, concrete check data sees Table 1.
Table 1 high-strength high-performance concrete compound mineral admixture embodiment 1
Number the standard of the like product that 1 high-strength high-performance concrete stipulates in the GB/T18736-2002 national standard of having issued with the activity index of compound mineral admixture as can be seen from Table 1.
Embodiment 2
Get superfine steel slag micropowder (10%) 13.50g, half water desulfurated plaster (2.5%) 3.4g, II level flyash (50%) 67.5g, S95 grade slag powder (37.5%) 50.6g, after mixing, promptly make a kind of high-strength high-performance concrete compound mineral admixture (numbering 2), test with the active method of inspection of compound mineral admixture by the high-strength high-performance concrete that GB/T18736-2002 country has issued, measure the ultimate compression strength of its 3d, 7d, 28d respectively, concrete check data sees Table 2.
Table 2 high-strength high-performance concrete compound mineral admixture embodiment 2
Number the standard of the like product that 2 high-strength high-performance concrete stipulates in the GB/T18736-2002 national standard of having issued with the activity index of compound mineral admixture as can be seen from Table 2.
Embodiment 3
Get superfine steel slag micropowder (12.6%) 17g, half water desulfurated plaster (3.4%) 4.6g, II level flyash (43%) 58g, S95 grade slag powder (41%) 55.4g, after mixing, promptly make a kind of high-strength high-performance concrete compound mineral admixture (numbering 3), test with the active method of inspection of compound mineral admixture by the high-strength high-performance concrete that GB/T18736-2002 country has issued, measure the ultimate compression strength of its 3d, 7d, 28d respectively, concrete check data sees Table 3.
Table 3 high-strength high-performance concrete compound mineral admixture embodiment 3
From table 3 embodiment (3), number the standard of the like product that 3 high-strength high-performance concrete stipulates in the GB/T18736-2002 national standard of having issued with the activity index of compound mineral admixture as can be seen
Standard for inspection and assessment of strength of concrete and method
Press the method for concrete strength test evaluation national standard (GBJ107-87), the following concrete ultimate compression strength of embodiment that (JGJ55) designs by " common concrete proportioning technical regulation " of check
Application Example 1
52.5 level ordinary Portland cement concrete preparation:
Press the proportioning preparation C50 concrete of following design with the mineral additive numbering 1 of embodiment 1 and embodiment 2 and the high-strength high-performance concrete of numbering 2 with compound mineral admixture and artificial sand, water cement ratio is 0.37, and sand coarse aggregate ratio is 40%; C40 concrete, water cement ratio are 0.41, and sand coarse aggregate ratio is 43%.Cement is selected 52.5 grades of ordinary Portland cements of conch board for use.Ultimate compression strength (7 days, 28 days) empirical value sees Table 4.
52.5 grades of ordinary Portland cement concrete preparations of table 4 Application Example 1
Only be that 35%, 28 day ultimate compression strength of binder total amount reaches design strength 116% with its cement consumption of C50 concrete of mineral additive numbering 1 preparation as can be seen from Table 4; With its cement consumptions of C40 concrete of mineral additive numbering 2 preparations is that 39%, 28 day ultimate compression strength of binder total amount reaches design strength 124%.Desulfurated plaster in the high-strength high-performance concrete compound mineral admixture, steel-making slag powder, the chip quality addition of flyash quality sum and alternative natural sand accounts for the concrete total mass more than 30%.
Application Example 2
42.5 level ordinary Portland cement concrete preparation:
High-strength high-performance concrete with embodiment 3 and embodiment 2 mineral additives numbering 3 and numbering 2 is pressed the proportioning preparation C30 concrete of following design with compound mineral admixture and artificial sand, and water cement ratio is 0.47, and sand coarse aggregate ratio is 44%; C20 concrete, water cement ratio are 0.55, and sand coarse aggregate ratio is 44%.Cement is selected 42.5 grades of ordinary Portland cements of conch board for use.Ultimate compression strength (7 days, 28 days) empirical value sees Table 5.
42.5 grades of ordinary Portland cement concrete of table 5 Application Example 2
Its cement consumptions of C30 concrete of using numbering 3 preparations as can be seen from Table 5 only are that 40%, 28 day ultimate compression strength of binder total amount reaches design strength 118%; With numbering 2 its cement consumptions of preparation C20 concrete is that 40%, 28 day ultimate compression strength of binder total amount reaches design strength 126%.Desulfurated plaster in the high-strength high-performance concrete compound mineral admixture, steel-making slag powder, the chip quality addition of flyash quality sum and alternative natural sand accounts for the concrete total mass more than 30%.
Above said content only is the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (6)
1. a high-strength high-performance concrete compound mineral admixture is characterized in that being made up of superfine steel slag micropowder, half water desulfurated plaster, II level flyash and four kinds of starting material of slag powders, and the weight percent of each raw material is:
Superfine steel slag micropowder 10-15%
Semi-hydrated gypsum 2.5-5%
II level flyash 35-50%
S95 grade slag powder 37.5-45%
Wherein said superfine steel slag micropowder meets the converter or the electric furnace slag of YB/T022 standard code, grinding after iron removal by magnetic separation is handled, specific surface area 〉=600m
2/ kg accounts for more than 90% of total mass less than the superfine steel slag micropowder of 30 μ m particle diameters, and metal Ferrum content≤0.5% allows during grinding to add≤1% slag quality, meets the cement grinding process admixture of JC/T667 standard;
Described semi-hydrated gypsum is β-CaSO
41/2H
2O is that the coal-fired plant flue gas desulphurization gypsum calcination forms;
Described II level flyash is to meet the flyash that the GB/T1596-2005 national standard is used for cement and concrete, its the key technical indexes is: fineness (45 μ m square hole sieves tail over)≤25%, loss on ignition≤8%, water demand ratio≤105%, stability (the Lei Shi folder boils and boils back increase distance (mm))≤5.0,28 days intensity activity index 〉=70%;
Described S95 grade slag powder is the slag powders that meets the GB/T18046-2008 national standard, and its key technical indexes is: density (g/cm
3) 〉=2.8, specific surface area (m
2/ kg) 〉=400,7 day activity index 〉=75%, 28 day activity index 〉=95%.
2. a high-strength high-performance concrete compound mineral admixture as claimed in claim 1 is characterized in that high-strength high-performance concrete with powerful feature index morning of compound mineral admixture is: 3 days activity index 〉=80%, 7 day activity index 〉=85%; 28 days activity index 〉=95%; Specific surface area 〉=450m
2/ kg.
3. a high-strength high-performance concrete as claimed in claim 1 or 2 is with the compound method of compound mineral admixture, it is characterized in that superfine steel slag micropowder, semi-hydrated gypsum, II level flyash and four kinds of raw materials of S95 grade slag powder in proportion after the weighing, are put into mixing machine after mechanical stirring mixes and promptly got the high-strength high-performance concrete compound mineral admixture.
4. high-strength high-performance concrete as claimed in claim 1 or 2 uses compound mineral admixture as preparation normal concrete, mass concrete, high-strength concrete, the application in prestressed concrete and concrete prefabricated element field.
5. the high-strength high-performance concrete as claimed in claim 4 application of compound mineral admixture as the preparation normal concrete.
6. utilize claim 1 or 2 described high-strength high-performance concretes to prepare the method for normal concrete, it is characterized in that with compound mineral admixture:
By " common concrete proportioning technical regulation " (JGJ55) during design mixture proportion:
The weight percent of gelling material composition consists of in the concrete:
High-strength high-performance concrete compound mineral admixture 〉=60%;
52.5 level ordinary Portland cement≤40%;
The weight percent of fine aggregate in the concrete (mixed sand) composition consists of:
Natural sand accounts for 10-25%;
The chip that produces in the rubble production accounts for the 75-90% of fine aggregate total amount, and the fine aggregate quality meets the standard of artificial sand among the GB/T14684-2001.
The kind of admixture is with not mix high-strength high-performance concrete identical when the compound mineral admixture;
High-strength high-performance concrete half water desulfurated plaster in the compound mineral admixture, steel-making slag powder, the chip quality addition of the quality sum of flyash and alternative natural sand accounts for the concrete total mass more than 30%;
Churning time is with not mix concrete identical when the compound mineral admixture during concrete production, and all the other technologies are constant.
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276178A (en) * | 2011-06-29 | 2011-12-14 | 南京友西科技有限责任公司 | High-strength press-steamed-free concrete composite additive |
| CN102503326A (en) * | 2011-10-19 | 2012-06-20 | 上海大学 | Environmentally-friendly concrete interface treating agent |
| CN102627419A (en) * | 2012-04-18 | 2012-08-08 | 上海海笠新型建材发展有限公司 | 52.5-grade slag portland cement and preparation method thereof |
| CN102701670A (en) * | 2012-05-23 | 2012-10-03 | 上海宝田新型建材有限公司 | Resource utilization type steel-slag concrete |
| CN103058542A (en) * | 2012-12-18 | 2013-04-24 | 上海市建筑科学研究院(集团)有限公司 | Novel steel mineral powder composite admixture excitant, and preparation and use methods of same |
| CN103265258A (en) * | 2012-10-28 | 2013-08-28 | 甘肃立之林建材有限公司 | Dry powder mortar prepared from industrial residues |
| CN105171915A (en) * | 2015-06-15 | 2015-12-23 | 洛阳理工学院 | Preparation method of concrete containing fly ash and silt |
| CN106277881A (en) * | 2015-06-09 | 2017-01-04 | 上海宝田新型建材有限公司 | A kind of compounded mineral admixture |
| CN107913688A (en) * | 2017-11-17 | 2018-04-17 | 天津海得润滋建材有限公司 | The preparation process of modified coal ash |
| CN109053013A (en) * | 2018-09-06 | 2018-12-21 | 中建西部建设新疆有限公司 | Concrete material, concrete composite powder and preparation method thereof |
| CN109987903A (en) * | 2019-04-29 | 2019-07-09 | 中交二公局东萌工程有限公司 | A kind of blast-furnace cinder powder concrete applied on highway |
| CN110028265A (en) * | 2019-03-13 | 2019-07-19 | 金泰成环境资源股份有限公司 | A kind of low viscous compact-type mineral admixture for concrete product |
| CN110498630A (en) * | 2019-08-01 | 2019-11-26 | 中路高科(北京)公路技术有限公司 | A kind of composite additive for concrete and preparation method thereof and concrete |
| CN111072299A (en) * | 2019-12-19 | 2020-04-28 | 江苏盐砼新材料科技有限公司 | Concrete mineral admixture based on steel slag flotation tail mud and preparation method thereof |
| CN112299804A (en) * | 2020-10-22 | 2021-02-02 | 北京建筑材料科学研究总院有限公司 | Industrial solid waste concrete for prefabricated part and preparation method and application thereof |
| CN112374781A (en) * | 2020-11-03 | 2021-02-19 | 北京建筑材料科学研究总院有限公司 | Steel slag modifier and preparation method and application thereof |
| CN113200698A (en) * | 2021-05-24 | 2021-08-03 | 河北科技大学 | Preparation method of early strength additive for solid waste based cementing material |
| CN113213802A (en) * | 2021-05-10 | 2021-08-06 | 江苏金木土科技有限公司 | High-performance concrete admixture and production method thereof |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276178A (en) * | 2011-06-29 | 2011-12-14 | 南京友西科技有限责任公司 | High-strength press-steamed-free concrete composite additive |
| CN102503326A (en) * | 2011-10-19 | 2012-06-20 | 上海大学 | Environmentally-friendly concrete interface treating agent |
| CN102627419A (en) * | 2012-04-18 | 2012-08-08 | 上海海笠新型建材发展有限公司 | 52.5-grade slag portland cement and preparation method thereof |
| CN102627419B (en) * | 2012-04-18 | 2013-06-26 | 上海海笠新型建材发展有限公司 | 52.5-grade slag portland cement and preparation method thereof |
| CN102701670A (en) * | 2012-05-23 | 2012-10-03 | 上海宝田新型建材有限公司 | Resource utilization type steel-slag concrete |
| CN103265258A (en) * | 2012-10-28 | 2013-08-28 | 甘肃立之林建材有限公司 | Dry powder mortar prepared from industrial residues |
| CN103265258B (en) * | 2012-10-28 | 2014-07-30 | 甘肃立之林建材有限公司 | Dry powder mortar prepared from industrial residues |
| CN103058542A (en) * | 2012-12-18 | 2013-04-24 | 上海市建筑科学研究院(集团)有限公司 | Novel steel mineral powder composite admixture excitant, and preparation and use methods of same |
| CN106277881A (en) * | 2015-06-09 | 2017-01-04 | 上海宝田新型建材有限公司 | A kind of compounded mineral admixture |
| CN105171915A (en) * | 2015-06-15 | 2015-12-23 | 洛阳理工学院 | Preparation method of concrete containing fly ash and silt |
| CN107913688A (en) * | 2017-11-17 | 2018-04-17 | 天津海得润滋建材有限公司 | The preparation process of modified coal ash |
| CN109053013B (en) * | 2018-09-06 | 2021-06-04 | 中建西部建设新疆有限公司 | Concrete raw material, composite powder for concrete and preparation method thereof |
| CN109053013A (en) * | 2018-09-06 | 2018-12-21 | 中建西部建设新疆有限公司 | Concrete material, concrete composite powder and preparation method thereof |
| CN110028265A (en) * | 2019-03-13 | 2019-07-19 | 金泰成环境资源股份有限公司 | A kind of low viscous compact-type mineral admixture for concrete product |
| CN109987903A (en) * | 2019-04-29 | 2019-07-09 | 中交二公局东萌工程有限公司 | A kind of blast-furnace cinder powder concrete applied on highway |
| CN110498630A (en) * | 2019-08-01 | 2019-11-26 | 中路高科(北京)公路技术有限公司 | A kind of composite additive for concrete and preparation method thereof and concrete |
| CN111072299A (en) * | 2019-12-19 | 2020-04-28 | 江苏盐砼新材料科技有限公司 | Concrete mineral admixture based on steel slag flotation tail mud and preparation method thereof |
| CN111072299B (en) * | 2019-12-19 | 2021-12-28 | 江苏盐砼新材料科技有限公司 | Concrete mineral admixture based on steel slag flotation tail mud and preparation method thereof |
| CN112299804A (en) * | 2020-10-22 | 2021-02-02 | 北京建筑材料科学研究总院有限公司 | Industrial solid waste concrete for prefabricated part and preparation method and application thereof |
| CN112299804B (en) * | 2020-10-22 | 2021-12-14 | 北京建筑材料科学研究总院有限公司 | Industrial solid waste concrete for prefabricated part and preparation method and application thereof |
| CN112374781A (en) * | 2020-11-03 | 2021-02-19 | 北京建筑材料科学研究总院有限公司 | Steel slag modifier and preparation method and application thereof |
| CN112374781B (en) * | 2020-11-03 | 2022-01-28 | 北京建筑材料科学研究总院有限公司 | Steel slag modifier and preparation method and application thereof |
| CN113213802A (en) * | 2021-05-10 | 2021-08-06 | 江苏金木土科技有限公司 | High-performance concrete admixture and production method thereof |
| CN113200698A (en) * | 2021-05-24 | 2021-08-03 | 河北科技大学 | Preparation method of early strength additive for solid waste based cementing material |
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