CN107010860A - Ultra-high performance concrete admixture and preparation method thereof - Google Patents
Ultra-high performance concrete admixture and preparation method thereof Download PDFInfo
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- CN107010860A CN107010860A CN201710224966.7A CN201710224966A CN107010860A CN 107010860 A CN107010860 A CN 107010860A CN 201710224966 A CN201710224966 A CN 201710224966A CN 107010860 A CN107010860 A CN 107010860A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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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
- 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
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Abstract
The invention discloses a kind of ultra-high performance concrete admixture and preparation method thereof, it is made up of by mass percentage following component：Steel-making slag powder 30~45%, low-temperature rice husk ashes 35~50%, red mud powder 10~23%, desulfurization gypsum powder 5~15%, synergist 0~5%, suppression contracting agent 0.03~0.1%, aerosil 0.3~1%.The ultra-high performance concrete admixture of the present invention fully utilizes slag, low-temperature rice husk ash, red mud and desulfurated plaster this several solid waste, by rational allocation and powder-modified, prepared mineral admixture can equivalent substitution silicon ash prepare ultra-high performance concrete, while its mechanical property can also be improved, suppress plastic shrinkage and later stage and shrink.
Description
Technical field
The present invention relates to concrete admixture technical field, in particular to a kind of ultra-high performance concrete admixture and its
Preparation method.
Background technology
Ultra-high performance concrete (UHPC) is a kind of new material with superhigh intensity, toughness and durability, and it is logical
Cross rejecting coarse aggregate, reduce water-cement ratio, highly active mineral admixture and closestpacking and the very-high performance for realizing material, so
UHPC preparation requires very high to raw material, wherein conventional admixture has high-quality silicon ash, miberal powder, flyash etc., but with demand
Amount increases severely, and supply falls short of demand and price Continued for above quality material, if can pass through compact reactor using several cheap materials
The admixture that can be suitably used for UHPC is prepared in product, activation design, can not only alleviate the deficiency of high-quality admixture resource, moreover it is possible to drop
Low UHPC preparation cost.In addition, because the cement amount of superelevation and ultralow water-cement ratio design caused by UHPC mix viscosity
Greatly, bubble is difficult discharge, plastic shrinkage and later stage contraction greatly, if its performance is improved by complex function component, certainly will be significantly
Improve the advantage of admixture specially.
The content of the invention
Present invention aim to provide a kind of preparation method of ultra-high performance concrete admixture, the very-high performance
Concrete admixture fully utilizes slag, low-temperature rice husk ash, red mud and desulfurated plaster this several solid waste, passes through and closes
Reason allotment and powder-modified, prepared mineral admixture can equivalent substitution silicon ash prepare ultra-high performance concrete, while can also
Improve its mechanical property, suppress plastic shrinkage and later stage contraction.
To achieve the above object, a kind of ultra-high performance concrete admixture provided by the present invention, by mass percentage
It is made up of following component：Steel-making slag powder 30~45%, low-temperature rice husk ashes 35~50%, red mud powder 10~23%, desulfurization gypsum powder
5~15%, synergist 0~5%, suppression contracting agent 0.03~0.1%, aerosil 0.3~1%.
Preferably, the ultra-high performance concrete admixture is made up of following component by mass percentage：Steel
Ground-slag 35~40%, low-temperature rice husk ashes 40~45%, red mud powder 10~15%, desulfurization gypsum powder 5~10%, synergist 1~
3%th, suppression contracting agent 0.03~0.05%, aerosil 0.4~0.6%.
As preferred plan, the ultra-high performance concrete admixture is made up of following component by mass percentage：Steel
Ground-slag 38%, low-temperature rice husk ashes 42%, red mud powder 11.4%, desulfurization gypsum powder 5%, synergist 3%, suppression contracting agent 0.04%,
Aerosil 0.56%.
Further, following component is included in the steel-making slag powder by mass percentage：Dicalcium silicate 2-10%, silicic acid
DFP 2-10%, vitreum 60-70%, CaO1-5%, MgO1-5%；Contain mass percent in the low-temperature rice husk ashes
For 90-95% unformed SiO2；Containing the aragonite and calcite that mass percent is 60-65% in the red mud powder, alkali
Mass percent content is 2-5%；Calcium sulphate dihydrate containing 90-95% in the desulfurization gypsum powder.
Further, the steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder are to open stream choosing using efficient
Grinding or Vertical Mill are made, and the surface area of the steel-making slag powder is 450~550m2/ kg, the surface area of the low-temperature rice husk ashes is
800~1000m2/ kg, the surface area of the red mud powder is 600~700m2/ kg, the surface area of the desulfurization gypsum powder is 380
~450m2/kg.
Further, described synergist is one or both of magnesium fluosilicate, sodium fluoride, calcium formate, described six
Magnesium fluosilicate, sodium fluoride, the purity of calcium formate are above 98%.
Further, the suppression contracting agent is one or both of urea, phenodiazine docosene dicarboxylic acid acid amides.
Further, described aerosil is the nanometer titanium dioxide being prepared from using chemical vapour deposition technique
Silicon, its purity is 98~99.9%, and surface area is 100~150m2/g。
Present invention also offers the preparation method of above-mentioned ultra-high performance concrete admixture, comprise the following steps：
1) weigh slag 30~45% by mass percentage, it is low-temperature rice husk ash 35~50%, red mud 10~23%, de-
Sulphur gypsum 5~15%, synergist 0~5%, suppression contracting agent 0.03~0.1%, aerosil 0.3~1%, it is standby；
2) by step 1) slag that weighs, low-temperature rice husk ash, red mud, desulfurated plaster is in efficient open-flow powder mill or Vertical Mill
Middle separate compiling to specific surface area be 450~550m2/kg, 800~1000m2/kg, 600~700m2/kg and 380~
450m2/kg, obtains steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) weigh
Synergist, suppression contracting agent, aerosil insert 6~8min of homogenizing in homogenizer, you can ultra-high performance concrete is made and blends
Material.
Further, in the step 3) in, the rotating speed of homogenizer is 100~150r/min.
Compared with prior art, the invention has the advantages that：
First, the present invention utilizes contained olivine, dicalcium silicate, the gelling of tricalcium silicate and low temperature rice in steel-making slag powder
Contained unformed SiO in shell ash2High pozzolanic activity make basis, low-temperature rice husk ash is a kind of trade waste, contains 90%
Unformed SiO above2, pozzolanic activity is very high, has enhancing modifying function to cement-based material, passes through institute in red mud powder
Containing Na2O、 K2Contained CaSO in O and desulfurization gypsum powder4·2H2O carries out sulphur alkali complex excitation, significantly improves steel-making slag powder and low
The activity of warm rice husk ashes.
Second, the present invention carries out powder using theory of close packing to slag, low-temperature rice husk ash, red mud and desulfurated plaster
Scale Design, recycles separate compiling technology by above solid waste separate compiling to required fineness, after the compound homogenizing of powder
Grain composition is in optimum range.
Third, the present invention is carried out using characteristics such as rush dispersiveness, defoaming, the rheological characteristics of aerosil to powder
Physical modification, it possesses the characteristics of surface area is big, surface energy is big, chemical purity is high, dispersive property is good, due to its nano effect,
The properties such as scattered remarkable rush, enhancing, froth breaking, rheology, resist sagging are shown in the material, can improve each component in concrete
In dispersiveness, significantly reduce viscosity, the air content of mix, thus improve concrete batching system service behaviour and hardening after
Mechanical property.
Fourth, the present invention can improve the hydration efficiency of binder materials to improve intensity using synergist, using suppression contracting agent with
Contained CaO, MgO synergy in steel-making slag powder, hence it is evident that the plastic shrinkage of reduction mixed mud and later stage shrink.
Fifth, ultra-high performance concrete admixture provided by the present invention can largely utilize slag, low-temperature rice husk ash,
Red mud and desulfurated plaster, incorporation can turn waste into wealth, again respectively 30~45%, 35~50%, 10~23%, 5~15%
Problem of environmental pollution, and ultra-high performance concrete admixture energy equivalent substitution silicon ash prepared by the present invention can be alleviated, had simultaneously
Viscosity reduction that standby silicon ash does not possess, suppress the function shunk.
Sixth, preparation technology of the present invention is simple, efficient open-flow powder mill or Vertical Mill and homogenizer are only needed, raw material are cheap
It is easy to get, cost is significantly lower than high-quality silicon ash.
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment 1
The preparation method of ultra-high performance concrete admixture provided in the present embodiment is as follows：
1) proportioning of raw material：By each component mass percent slag 30%, low-temperature rice husk ash 50%, red mud 10% takes off
Sulphur gypsum 6.4%, synergist 3.0%, suppression contracting agent 0.04%, aerosil 0.56% accurately weighs said components；Its
Middle synergist is sodium fluoride, and suppression contracting agent is urea.
2) by step 1) slag that weighs, low-temperature rice husk ash, red mud, desulfurated plaster in efficient open-flow powder mill respectively
Grinding to specific surface area is 550m2/kg、1000m2/kg、700m2/ kg and 450m2/ kg, obtains steel-making slag powder, low-temperature rice husk ash
Powder, red mud powder, desulfurization gypsum powder；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) weigh
Synergist, suppression contracting agent, aerosil are inserted in the 120r/min homogenizer with fly cutter and are homogenized 6min, you can be made super
High-performance concrete additive.
In above-mentioned raw material, include following component in the steel-making slag powder by mass percentage：Dicalcium silicate 10%, silicon
Sour DFP 10%, vitreum 60%, CaO5%, MgO5%；Containing mass percent it is 95% in the low-temperature rice husk ashes
Unformed SiO2；Contain the aragonite and calcite that mass percent is 65%, the mass percent content of alkali in the red mud powder
For 5%；Contain 95% calcium sulphate dihydrate in the desulfurization gypsum powder.
Embodiment 2
The preparation method of ultra-high performance concrete admixture provided in the present embodiment is as follows：
1) proportioning of raw material：By each component mass percent slag 45%, low-temperature rice husk ash 35%, red mud 10% takes off
Sulphur gypsum 6.4%, synergist 3.0%, suppression contracting agent 0.04%, aerosil 0.56% accurately weighs said components；Its
Middle synergist is magnesium fluosilicate, and suppression contracting agent is phenodiazine docosene dicarboxylic acid acid amides.
2) by slag, low-temperature rice husk ash, red mud, desulfurated plaster in efficient open-flow powder mill separate compiling to than surface
Product is 550m2/kg、1000m2/kg、700m2/ kg and 450m2/ kg, obtains steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization
Land plaster；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) weigh
Synergist, suppression contracting agent, aerosil are inserted in the 120r/min homogenizer with fly cutter and are homogenized 6min, you can be made super
High-performance concrete additive.
In above-mentioned raw material, include following component in the steel-making slag powder by mass percentage：Dicalcium silicate 10%, silicon
Sour DFP 2%, vitreum 70%, CaO1%, MgO5%；Containing mass percent it is 90% in the low-temperature rice husk ashes
Unformed SiO2；Contain the aragonite and calcite that mass percent is 60%, the mass percent content of alkali in the red mud powder
For 2%；Contain 90% calcium sulphate dihydrate in the desulfurization gypsum powder.
Embodiment 3
The preparation method of ultra-high performance concrete admixture provided in the present embodiment is as follows：
1) proportioning of raw material：By each component mass percent slag 35%, low-temperature rice husk ash 45%, red mud 11.4%,
Desulfurated plaster 5%, synergist 3.0%, suppression contracting agent 0.04%, aerosil 0.56% accurately weighs said components；Its
Middle synergist is calcium formate, and suppression contracting agent is phenodiazine docosene dicarboxylic acid acid amides.
2) by step 1) slag that weighs, low-temperature rice husk ash, red mud, desulfurated plaster in Vertical Mill separate compiling to than table
Area is 550m2/kg、1000m2/kg、700m2/ kg and 450 m2/ kg, obtains steel-making slag powder, low-temperature rice husk ashes, red mud powder, de-
Sulphur land plaster；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) weigh
Synergist, suppression contracting agent, aerosil are inserted in the 120r/min homogenizer with fly cutter and are homogenized 6min, you can be made super
High-performance concrete additive.
In above-mentioned raw material, include following component in the steel-making slag powder by mass percentage：Dicalcium silicate 8%, silicic acid
DFP 8%, vitreum 65%, CaO1%, MgO5%；Contain the nothing that mass percent is 92% in the low-temperature rice husk ashes
Shape SiO2；Containing the aragonite and calcite that mass percent is 62% in the red mud powder, the mass percent content of alkali is
5%；Contain 92% calcium sulphate dihydrate in the desulfurization gypsum powder.
Embodiment 4
The preparation method of ultra-high performance concrete admixture provided in the present embodiment is as follows：
1) proportioning of raw material：By each component mass percent slag 40%, low-temperature rice husk ash 40%, red mud 11.4%,
Desulfurated plaster 5%, synergist 3.0%, suppression contracting agent 0.04%, aerosil 0.56% accurately weighs said components；Its
Middle synergist is magnesium fluosilicate, and suppression contracting agent is phenodiazine docosene dicarboxylic acid acid amides.
2) by slag, low-temperature rice husk ash, red mud, desulfurated plaster in efficient open-flow powder mill separate compiling to than surface
Product is 550m2/kg、1000m2/kg、700m2/ kg and 450m2/ kg, obtains steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization
Land plaster；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) weigh
Synergist, suppression contracting agent, aerosil are inserted in the 120r/min homogenizer with fly cutter and are homogenized 6min, you can be made super
High-performance concrete additive.
In above-mentioned raw material, include following component in the steel-making slag powder by mass percentage：Dicalcium silicate 10%, silicon
Sour DFP 10%, vitreum 60%, CaO5%, MgO5%；Containing mass percent it is 95% in the low-temperature rice husk ashes
Unformed SiO2；Contain the aragonite and calcite that mass percent is 65%, the mass percent content of alkali in the red mud powder
For 5%；Contain 95% calcium sulphate dihydrate in the desulfurization gypsum powder.
Embodiment 5
The preparation method of ultra-high performance concrete admixture provided in the present embodiment is as follows：
1) proportioning of raw material：By each component mass percent slag 38%, low-temperature rice husk ash 42%, red mud 11.4%,
Desulfurated plaster 5%, synergist 3.0%, suppression contracting agent 0.04%, aerosil 0.56% accurately weighs said components；Its
Middle synergist is magnesium fluosilicate, and suppression contracting agent is phenodiazine docosene dicarboxylic acid acid amides.
2) by step 1) slag that weighs, low-temperature rice husk ash, red mud, desulfurated plaster in Vertical Mill separate compiling to than table
Area is 450m2/kg、800m2/kg、600m2/ kg and 380m2/ kg, obtains steel-making slag powder, low-temperature rice husk ashes, red mud powder, de-
Sulphur land plaster；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) weigh
Synergist, suppression contracting agent, aerosil are inserted in the 120r/min homogenizer with fly cutter and are homogenized 6min, you can be made super
High-performance concrete additive.
In above-mentioned raw material, include following component in the steel-making slag powder by mass percentage：Dicalcium silicate 2%, silicic acid
DFP 2%, vitreum 70%, CaO5%, MgO5%；Contain the nothing that mass percent is 95% in the low-temperature rice husk ashes
Shape SiO2；Containing the aragonite and calcite that mass percent is 65% in the red mud powder, the mass percent content of alkali is
5%；Contain 95% calcium sulphate dihydrate in the desulfurization gypsum powder.
Performance test is carried out to the ultra-high performance concrete admixture prepared by embodiment 1~5, experiment proportioning is shown in Table
1, test result is shown in Table 2.
The ultra-high performance concrete match ratio (kg) of table 1
| Sequence number | Admixture | Water | Cement | Admixture | Coarse sand | Middle sand | Fine sand | Water reducer | Steel fibre |
| 1 | Silicon ash | 3.5 | 14.6 | 6.25 | 6.25 | 11.5 | 3.15 | 0.42 | 3.5 |
| 2 | Embodiment 1 | 3.5 | 14.6 | 6.25 | 6.25 | 11.5 | 3.15 | 0.42 | 3.5 |
| 3 | Embodiment 2 | 3.5 | 14.6 | 6.25 | 6.25 | 11.5 | 3.15 | 0.42 | 3.5 |
| 4 | Embodiment 3 | 3.5 | 14.6 | 6.25 | 6.25 | 11.5 | 3.15 | 0.42 | 3.5 |
| 5 | Embodiment 4 | 3.5 | 14.6 | 6.25 | 6.25 | 11.5 | 3.15 | 0.42 | 3.5 |
| 6 | Embodiment 5 | 3.5 | 14.6 | 6.25 | 6.25 | 11.5 | 3.15 | 0.42 | 3.5 |
The test result of table 2
| Sequence number | Divergence | Air content | 3h expansion rates | 28d contract with dry rate | 3d resistance to compressions | The anti-foldings of 3d | 28d resistance to compressions | The anti-foldings of 28d |
| 1 | 700mm | 3.0% | - 0.1% | - 0.06% | 92.5MPa | 21.0MPa | 152.5MPa | 26.0MPa |
| 2 | 720mm | 2.4% | 0.07% | - 0.025% | 88.5MPa | 19.3MPa | 157.0MPa | 26.8MPa |
| 3 | 760mm | 2.2% | 0.082% | - 0.015% | 86.7MPa | 18.6MPa | 155.0MPa | 26.5MPa |
| 4 | 730mm | 2.3% | 0.08% | - 0.02% | 89.6MPa | 19.5MPa | 158.2MPa | 27.6MPa |
| 5 | 750mm | 2.2% | 0.081% | - 0.017% | 87.9MPa | 19.0MPa | 157.0MPa | 27.5MPa |
| 6 | 745mm | 2.0% | 0.081% | - 0.016% | 91.5MPa | 21.0MPa | 163.2MPa | 28.3MPa |
It is can be seen that from Tables 1 and 2 result of the test using the ultra-high performance concrete admixture described in embodiment 1~5
Equivalent substitution silicon ash prepare ultra-high performance concrete service behaviour more preferably, air content it is lower, can effectively suppress concrete plasticity
Shrink and later stage drying shrinkage, the anti-foldings of 3d, compression strength are slightly lower, the anti-foldings of 28d, compression strength are significantly improved.
The technical scheme and feature of above-mentioned case study on implementation only to illustrate the invention, its object is to preferably allow be familiar with being somebody's turn to do
The personage of technology is practiced, it is not intended to limit the scope of the present invention, all to be made according to spirit of the invention
Equivalent change or modification, within the scope of the present invention.
Claims (10)
1. a kind of ultra-high performance concrete admixture, it is characterised in that the ultra-high performance concrete admixture is by weight percent
Meter is made up of following component：Steel-making slag powder 30~45%, low-temperature rice husk ashes 35~50%, red mud powder 10~23%, desulfurated plaster
Powder 5~15%, synergist 0~5%, suppression contracting agent 0.03~0.1%, aerosil 0.3~1%.
2. ultra-high performance concrete admixture according to claim 1, it is characterised in that the ultra-high performance concrete is blended
Material is made up of following component by mass percentage：Steel-making slag powder 35~40%, low-temperature rice husk ashes 40~45%, red mud powder 10~
15%th, desulfurization gypsum powder 5~10%, synergist 1~3%, suppression contracting agent 0.03~0.05%, aerosil 0.4~
0.6%.
3. ultra-high performance concrete admixture according to claim 2, it is characterised in that the ultra-high performance concrete is blended
Material is made up of following component by mass percentage：Steel-making slag powder 38%, low-temperature rice husk ashes 42%, red mud powder 11.4%, desulfurization
Land plaster 5%, synergist 3%, suppression contracting agent 0.04%, aerosil 0.56%.
4. the ultra-high performance concrete admixture according to claim 1 or 2 or 3, it is characterised in that pressed in the steel-making slag powder
Mass percentage includes following component：Dicalcium silicate 2-10%, tricalcium silicate 2-10%, vitreum 60-70%, CaO1-
5%th, MgO1-5%；Contain the unformed SiO that mass percent is 90-95% in the low-temperature rice husk ashes2；The red mud powder
In containing the aragonite and calcite that mass percent is 60-65%, the mass percent content of alkali is 2-5%；The desulfurization stone
Calcium sulphate dihydrate containing 90-95% in cream powder.
5. the ultra-high performance concrete admixture according to claim 1 or 2 or 3, it is characterised in that the steel-making slag powder, low
Warm rice husk ashes, red mud powder, desulfurization gypsum powder are to be made using efficient open-flow powder mill or Vertical Mill, the surface of the steel-making slag powder
Product is 450~550m2/ kg, the surface area of the low-temperature rice husk ashes is 800~1000m2/ kg, the surface area of the red mud powder
For 600~700m2/ kg, the surface area of the desulfurization gypsum powder is 380~450m2/kg。
6. the ultra-high performance concrete admixture according to claim 1 or 2 or 3, it is characterised in that described synergist is
One or both of magnesium fluosilicate, sodium fluoride, calcium formate, the magnesium fluosilicate, sodium fluoride, calcium formate purity it is high
In 98%.
7. the ultra-high performance concrete admixture according to claim 1 or 2 or 3, it is characterised in that the suppression contracting agent is urine
One or both of element, phenodiazine docosene dicarboxylic acid acid amides.
8. the ultra-high performance concrete admixture according to claim 1 or 2 or 3, it is characterised in that described gas phase dioxy
SiClx is the nano silicon being prepared from using chemical vapour deposition technique, and its purity is 98~99.9%, and surface area is 100
~150m2/g。
9. the preparation method of the ultra-high performance concrete admixture described in a kind of claim 1, it is characterised in that including following step
Suddenly：
1) slag 30~45%, low-temperature rice husk ash 35~50%, red mud 10~23%, desulfurated plaster are weighed by mass percentage
5~15%, synergist 0~5%, suppression contracting agent 0.03~0.1%, aerosil 0.3~1%, standby；
2) by step 1) slag that weighs, low-temperature rice husk ash, red mud, desulfurated plaster in efficient open-flow powder mill or Vertical Mill respectively
Grinding to specific surface area is 450~550m2/ kg, 800~1000m2/ kg, 600~700m2/ kg, 380~450m2/ kg, is obtained
Steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder；
3) by step 2) obtained by steel-making slag powder, low-temperature rice husk ashes, red mud powder, desulfurization gypsum powder and step 1) synergy that weighs
Agent, suppression contracting agent, aerosil insert 6~8min of homogenizing in homogenizer, you can ultra-high performance concrete admixture is made.
10. the preparation method of ultra-high performance concrete admixture according to claim 9, it is characterised in that in the step
It is rapid 3) in, the rotating speed of homogenizer is 100~150r/min.
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| CN110982578A (en) * | 2019-11-22 | 2020-04-10 | 南京钢铁股份有限公司 | Blast furnace blowing semi-coke additive and preparation and use method thereof |
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| CN115259788B (en) * | 2022-07-15 | 2023-03-28 | 湖北工业大学 | Preparation method of low-cost green ultra-high performance concrete |
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