CN102718424B - High-activity granulated blast furnace slag and preparation method thereof - Google Patents

High-activity granulated blast furnace slag and preparation method thereof Download PDF

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Publication number
CN102718424B
CN102718424B CN2012102115176A CN201210211517A CN102718424B CN 102718424 B CN102718424 B CN 102718424B CN 2012102115176 A CN2012102115176 A CN 2012102115176A CN 201210211517 A CN201210211517 A CN 201210211517A CN 102718424 B CN102718424 B CN 102718424B
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slag micropowder
concrete
granulated blast
mixture
furnace slag
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CN102718424A (en
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苟德胜
李斌斌
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Jianhua building materials (China) Co., Ltd.
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Jiangsu Builds China Pipe Pile Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a high-activity granulated blast furnace slag and a preparation method thereof. In the process of grinding the granulated blast furnace slag, and a solid synergist is added in a ratio of 10-30%, through commonly grinding, the granulated blast furnace slag with a specific surface area of 350-600 m2/kg is obtained. The high-activity granulated blast furnace slag can be doped in concrete and cement products, because the granulated blast furnace slag has high activity and a certain water reducing property, while the water consumption is appropriately reduced, the early strength development of concrete and cement products can be promoted; meanwhile, concrete and cement products doped with the high-activity granulated blast furnace slag can achieve the design performance requirements thereof in advance under the condition of natural curing or non-autoclave normal-pressure steam curing; and the corrosion resistance and durability of concrete and cement products doped with the high-activity granulated blast furnace slag are also obviously improved. The main components of the solid synergist are as follows: active silicon, sulfate, high-activity calcium oxide, a small amount of organic matters, a moderate amount of other inorganic materials, so that the solid synergist belongs to a high-activity compound material.

Description

A kind of high reactivity slag micropowder and preparation method thereof
Technical field
The present invention relates to a kind of high reactivity slag micropowder of building material field and preparation method thereof.
Background technology
Use the cement and concrete goods can improve building engineering construction efficiency, after concrete depositing, if hot climate, dry air, carry out not in time maintenance, in concrete, moisture can evaporate too fast, form the dehydration phenomenon, the cement granules that can make to have formed gelinite is aquation fully, can not be converted into stable crystallization, lack enough cohesive forces, thereby can occur that sheet or powdery come off at concrete surface, in addition, when concrete not yet possesses enough intensity, the too early evaporation of moisture also can produce larger shrinkage strain, cup shake appears, affect concrete weather resistance and globality.Therefore in the concrete strength rise period, in order to obtain enough intensity within a short period of time and to accelerate the mould turnover, guarantee the technical indicators such as concrete intensity, weather resistance simultaneously, usually it is carried out to maintenance.Traditional concrete curing method has natural curing, atmospheric steam curing and High Temperature High Pressure maintenance etc.The natural curing required time is longer, and difficult quality guarantee; Steam curing system and technique scientific and reasonable in atmospheric steam curing are one of important prerequisites of producing the high quality cement concrete product, maintaining process generally be divided into quietly stop, intensification, constant temperature, 4 stages of cooling, in order to prevent that the too high concrete that causes of excessive or thermostat temperature produces crack to goods because of internal-external temperature difference, heating-cooling speed in the steam-cured process of necessary strict control and thermostat temperature etc., process very complicated and strict, condition control is bad just easily causes concrete product not reach preparation technology's requirement; And the requirement of High Temperature High Pressure curing condition is higher, the local various resources of common many constructions are critical shortage, and its exacting terms has limited its range of application.
The defect of traditional method more and more is difficult to adapt to the modern construction needs, therefore, people have worked out type material and the technique of concrete pouring, granulated blast-furnace slag is a kind of vitreous structure material with very high lateral reactivity that blast-furnace slag obtains through the chilling of water, in recent years at slag cement, concrete admixture, slag micropowder, slag fibre, the aspects such as filler of building the road obtain very large utilization, the concrete and rebar cohesive force that is mixed with slag micropowder strengthens, late strength of concrete improves, prevent shrinkage cracking, the good characteristics such as concrete basicity is low, it is the basic material for preparing high performance concrete, 2011 annual China iron and steel outputs reach more than 68.3 hundred million ton, can discharge the granulated blast-furnace slag of 2,000,000,000 tons nearly, the recycling save energy of granulated blast-furnace slag, also can greatly reduce when reducing production costs and take up an area and environmental pollution, produce economic benefit and social benefit preferably.Although the research of slag micropowder has improved the concrete performances such as intensity, workability, cohesive force, never from vapor cure time and condition, the resources conservations such as the input of high-tension apparatus, production efficiency equal angles are improved.How further to improve slag micropowder lateral reactivity, increase that it is functional, enlarge its Application Areas becomes a very important research topic in industry.
Summary of the invention
The object of the invention is to, Application Areas lower for the existing ubiquitous activity of slag micropowder limitation, functional relatively single problem, the slag micropowder that provide that a kind of activity is high, Application Areas is wide, there is multi-functional, when improving concrete over-all properties, also reach enhance productivity, reduce production costs, the purpose of energy-saving and emission-reduction.
For achieving the above object; the present invention is by the following technical solutions: a kind of high reactivity slag micropowder; it is characterized in that: after described high reactivity slag micropowder mixes the solid synergistic agent that weight ratio is 10%~30% in granulated blast-furnace slag, common the grinding forms, and specific surface area is 350~600m 2/ kg.
Described solid synergistic agent comprises following component (weight percent): activated silica 15%~75%, vitriol 10%~75%, highly active calcium oxide 5%~60%, organism 1%~2%, inorganics 0.8%~5%.
Described activated silica is one or more the mixture in SILICA FUME, silicon ash, superfined flyash.
Described vitriol is one or more the mixture in natural fine gypsum or industrial gypsum.
One or more the mixture that described industrial gypsum is desulfurated plaster, phosphogypsum or citric acid gypsum.
In described highly active calcium oxide, CaO content is not less than 60%.
Described organism is the alcamines aniorfic surfactant, is preferably one or both mixture of trolamine or tri-isopropanolamine.
One or more the mixture that described inorganics is silicate or alkaline matter, be preferably one or both mixture of water glass or potassium silicate.
Described solid synergistic agent comprises following component (weight percent): activated silica 27%~50%, vitriol 15%~59%, highly active calcium oxide 10%~30%, organism 1%~2%, inorganics 1%~3%; Be preferably activated silica 30%~40%, vitriol 20%~50%, highly active calcium oxide 15%~25%, organism 1%~2%, inorganics 1%~3%.
A kind of high reactivity slag micropowder is characterized in that: after described high reactivity slag micropowder mixes the solid synergistic agent that weight ratio is 20%~25% in granulated blast-furnace slag, common the grinding forms, and specific surface area is 350~600m 2/ kg.
A kind of preparation method of high reactivity slag micropowder is characterized in that: by described each component by described proportioning, after metering in the milling equipments such as ball mill, Vertical Mill, roll squeezer intergrinding to specific surface area 350~600m 2the slag micropowder of/kg.
Slag micropowder lateral reactivity of the present invention is fully excited, can participate in rapidly reaction, its filling effect, pile up effect, micro aggregate effect is remarkable, promote the development of early age strength of concrete, simultaneously with certain concrete water reducing ability, can greatly reduce water-cement ratio, guarantee its workability and operability, obviously show the raising along with high reactivity slag micropowder replacement amount in the application test of cement products, under the approaching condition of mortar fluidity, water requirement obviously reduces glue sand intensity in early stage simultaneously and is significantly improved, and 28d intensity is far above the benchmark cement mortar strength, replace cement with high reactivity slag micropowder of the present invention in concrete after, its intensity and durability index are also more due to common high-strength concrete, and the application test in design C40 label concrete shows too, after the high reactivity slag micropowder replaces part of cement, water consumption obviously reduces, and strength development is rapid, and natural curing 14d intensity has reached design requirements, application result in the steam-cured high-strength concrete that same the present invention is C80 at strength grade of concrete shows, water-cement ratio reduces greatly, and through after atmospheric steam curing, the concrete 1d intensity of having added high reactivity slag micropowder of the present invention reach the class requirement of C80, and its later strength sustainable growth, 2d intensity almost maintains an equal level with the concrete strength through autoclave curing, above result all shows use of the present invention, can reduce to a great extent normal temperature, the ordinary pressure curing time, without autoclave curing, therefore, greatly saved the steam usage quantity, reduce the input of high-tension apparatus, saved resource, be conducive to environmental protection, society, remarkable in economical benefits, simultaneously, greatly shorten the time from work in-process to the finished product, improved production efficiency, strengthened competitive edge, in addition, use the present invention, can reduce porosity, improve pore structure, and then improve the compactness of concrete and cement products, make finished product all show higher level aspect sulphate attack, chloride permeability, the weather resistance such as freeze proof.
In sum, this kind of high reactivity slag micropowder, when improving concrete over-all properties, reach and reduce production costs, the purpose of energy-saving and emission-reduction, once be widely used in the production of concrete and cement products, it will bring good economic benefit and social benefit.
Embodiment
Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
Embodiment 1: a kind of high reactivity slag micropowder, mix 10% solid synergistic agent in granulated blast-furnace slag after common the grinding form.The proportioning of solid synergistic agent is (weight percent): SILICA FUME 15%, natural fine gypsum 59%, highly active calcium oxide 20%, trolamine 1%, water glass 5%.
Embodiment 2: a kind of high reactivity slag micropowder, mix 20% solid synergistic agent in granulated blast-furnace slag after common the grinding form.The proportioning of solid synergistic agent is (weight percent): superfined flyash 50%, natural fine gypsum 10%, desulfurated plaster 5%, highly active calcium oxide 30%, tri-isopropanolamine 1%, potassium silicate 2% and water glass 2%.
Embodiment 3: a kind of high reactivity slag micropowder, mix 30% solid synergistic agent in granulated blast-furnace slag after common the grinding form.The proportioning of solid synergistic agent is (weight percent): SILICA FUME 10%, superfined flyash 17%, desulfurated plaster 10.2%, highly active calcium oxide 60%, trolamine 1%, tri-isopropanolamine 1% and potassium silicate 0.8%.
Embodiment 4: a kind of high reactivity slag micropowder, mix 25% solid synergistic agent in granulated blast-furnace slag after common the grinding form.The proportioning of solid synergistic agent is (weight percent): silicon ash 20%, superfined flyash 55%, desulfurated plaster 10%, highly active calcium oxide 10%, tri-isopropanolamine 2% and water glass 3%.
Embodiment 5: a kind of high reactivity slag micropowder, mix 25% solid synergistic agent in granulated blast-furnace slag after common the grinding form.The proportioning of solid synergistic agent is (weight percent): silicon ash 5%+ superfined flyash 10%, desulfurated plaster 75%, highly active calcium oxide 5%, trolamine 1.5%, tri-isopropanolamine 0.5%, potassium silicate 1% and water glass 2%.
The performance test results of the high reactivity slag micropowder that above-described embodiment is prepared is as follows:
One, the product performance of the high reactivity slag micropowder of embodiment 1-5
The product performance of table 1 high reactivity slag micropowder
The test demonstration, the described slag micropowder activity index of embodiment 1-5 improves greatly, and meeting or exceeding specific surface area on market is 600-1000m 2the activity index of the slag micropowder of/kg.
Two, the application test of high reactivity slag micropowder in cement products
The prepared high reactivity slag micropowder of embodiment 4 be take respectively weight ratio as 10%, 30%, 50% equivalent replacement cement mortar, make the mortar mobility substantially identical, compare the intensity of its 3d, 7d, 28d in the time of the test water requirement, concrete outcome is as shown in table 2.
Table 2 high reactivity slag micropowder replaces the impact of cement mortar on intensity
Test shows, along with the raising of high reactivity slag micropowder replacement amount, under the approaching condition of mortar fluidity, water requirement obviously reduces.And glue sand intensity in early stage is significantly improved, and 28d intensity is far above the benchmark cement mortar strength.
Three, the application test of high reactivity slag micropowder in concrete
1. adopt the prepared high reactivity slag micropowder design C40 label concrete of embodiment 3, requiring its slump is 140~180mm, investigates its water requirement, curing time and intensity index thereof, and result is as shown in table 3.
Table 3 is for designing when index of correlation of the concrete concrete match ratio of C40 label
The test demonstration, after the high reactivity slag micropowder replaces 30% cement, water consumption reduces 22kg/m 3, and strength development is rapid, and natural curing 14d intensity has reached design requirements.
2. embodiment 1 and the 2 prepared application of high reactivity slag micropowder in high-strength concrete, strength grade of concrete C80, slump 30~50mm, through an atmospheric steam curing, investigate its water-cement ratio, intensity index etc., and result is as shown in table 4.
The concrete match ratio that table 4 is applied at high-strength concrete is index of correlation when
The test demonstration, replace 45% cement with the high reactivity slag micropowder in high-strength concrete after, water-cement ratio is reduced to below 0.30.Through after atmospheric steam curing, the concrete 1d intensity of having added the high reactivity slag micropowder reach the class requirement of C80.And its later strength sustainable growth, 2d intensity almost maintains an equal level with the concrete strength through autoclave curing.So the high reactivity slag micropowder can obtain production application in high-strength concrete.
Four, add the endurance performance of concrete test of high reactivity slag micropowder
The C80 grade concrete of take is example, and with embodiment 5, prepared high reactivity slag micropowder be take respectively weight ratio as 20%, 40% equivalent replacement cement, carries out the endurance quality test, and concrete outcome is as shown in table 5.
Table 5 replaces intensity and durability index after cement in high-strength concrete
The test demonstration, replace the cement of 20%, 40% weight with high reactivity slag micropowder equivalent in high-strength concrete after, its intensity and durability index more are better than common high-strength concrete.
As mentioned above, although meaned and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make a variety of changes in the form and details it.

Claims (7)

1. a high reactivity slag micropowder is characterized in that: after described high reactivity slag micropowder mixes the solid synergistic agent that weight ratio is 10% ~ 30% in granulated blast-furnace slag, common the grinding forms, and specific surface area is 350 ~ 600 m 2/ kg; Described solid synergistic agent comprises following component (weight percent): activated silica 15% ~ 75%, vitriol 10% ~ 75%, highly active calcium oxide 5% ~ 60%, organism 1% ~ 2%, inorganics 0.8% ~ 5%; Wherein, described activated silica is one or more the mixture in SILICA FUME, silicon ash, superfined flyash; Described vitriol is one or more the mixture in natural fine gypsum or industrial gypsum; Described organism is the alcamines aniorfic surfactant; One or more the mixture that described inorganics is silicate or alkaline matter.
2. a kind of high reactivity slag micropowder according to claim 1 is characterized in that: one or more the mixture that described industrial gypsum is desulfurated plaster, phosphogypsum or citric acid gypsum.
3. a kind of high reactivity slag micropowder according to claim 1, it is characterized in that: in described highly active calcium oxide, CaO content is not less than 60%.
4. a kind of high reactivity slag micropowder according to claim 1, is characterized in that: the mixture of one or both that described alcamines aniorfic surfactant is trolamine or tri-isopropanolamine.
5. a kind of high reactivity slag micropowder according to claim 1 is characterized in that: one or both the mixture that described silicate is water glass or potassium silicate.
6. a kind of high reactivity slag micropowder according to claim 1, it is characterized in that: described solid synergistic agent comprises following component (weight percent): activated silica 27% ~ 50%, vitriol 15% ~ 59%, highly active calcium oxide 10% ~ 30%, organism 1% ~ 2%, inorganics 1% ~ 3%; Wherein, described activated silica is one or more the mixture in SILICA FUME, silicon ash, superfined flyash; Described vitriol is one or more the mixture in natural fine gypsum or industrial gypsum; Described organism is the alcamines aniorfic surfactant; One or more the mixture that described inorganics is silicate or alkaline matter.
7. the preparation method of a high reactivity slag micropowder is characterized in that: after proportion speed according to claim 1 measures described component, by all components jointly in ball mill, Vertical Mill or roll squeezer grinding to specific surface area be 350 ~ 600m 2the slag micropowder of/kg.
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CN104446079A (en) * 2014-11-25 2015-03-25 广西鱼峰水泥股份有限公司 Preparation process for high-activity mineral powder
CN104496212A (en) * 2014-11-25 2015-04-08 广西鱼峰水泥股份有限公司 Highly active mineral powder formula
CN104926173B (en) * 2015-06-17 2017-03-15 遵义市聚源建材有限公司 Complex ore slag fine powder and preparation method thereof
CN104961370A (en) * 2015-07-17 2015-10-07 随州金环水泥有限责任公司 Ultrafine slag micro powder and preparation method thereof
CN105174758A (en) * 2015-09-15 2015-12-23 和县浙徽新型材料有限公司 Borosilicate glass powder modified ultra-fine slag micro-powder and preparation method thereof
CN106006696B (en) * 2016-05-12 2018-03-13 贵州开磷磷石膏综合利用有限公司 A kind of application of Gypsum Fibrosum micropowder preparation method and the Gypsum Fibrosum micropowder
CN107253842B (en) * 2017-07-13 2019-09-17 辽宁兆利高新路面材料有限公司 A kind of cement mortar dry powder and its preparation method and application
CN107663037A (en) * 2017-09-05 2018-02-06 和县浙徽新型材料有限公司 A kind of non-burning brick slag micropowder used for strengthening water resistance and preparation method thereof
CN107721210A (en) * 2017-09-05 2018-02-23 和县浙徽新型材料有限公司 A kind of high activity slag micropowder and preparation method thereof
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