CN115707669A - Method for producing concrete composite mineral admixture - Google Patents
Method for producing concrete composite mineral admixture Download PDFInfo
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- CN115707669A CN115707669A CN202110948783.6A CN202110948783A CN115707669A CN 115707669 A CN115707669 A CN 115707669A CN 202110948783 A CN202110948783 A CN 202110948783A CN 115707669 A CN115707669 A CN 115707669A
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- 239000004567 concrete Substances 0.000 title claims abstract description 38
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 31
- 239000011707 mineral Substances 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 54
- 239000002893 slag Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000007885 magnetic separation Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 5
- 239000010453 quartz Substances 0.000 claims abstract description 4
- 239000010881 fly ash Substances 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 3
- 229940037003 alum Drugs 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 8
- 239000002440 industrial waste Substances 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 238000011049 filling Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002002 slurry Substances 0.000 description 5
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011155 quantitative monitoring Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a method for producing concrete composite mineral admixture, and relates to the technical field of composite mineral admixture manufacturing. A method for producing a concrete complex mineral admixture comprises the following steps: selecting magnetic metal in a mixed slag raw material A by using a magnetic separation method, wherein the mixed slag raw material A comprises 20-30wt% of granulated blast furnace slag, 20-30wt% of silica fume, 10-20wt% of volcanic ash, 10-20wt% of quartz powder and 2-5wt% of a composite excitant; step two: and (2) putting the mixed slag raw material A into a vertical mill for grinding, and drying by a dryer after grinding, wherein the powdery slag raw material B is selected by a powder separator, and the particle diameter of the powdery slag raw material B is 12-19 mu m. The invention relates to the application of admixture taking industrial waste residue as main material in concrete in large quantity, which firstly means that the production of concrete reduces the environmental pollution of the industrial waste residue and the waste of land resources, and secondly, reduces the dosage of cement in a cementing material and indirectly reduces the environmental pollution caused by the production of cement.
Description
Technical Field
The invention relates to the technical field of manufacturing of composite mineral admixture, in particular to a method for producing concrete composite mineral admixture.
Background
The existing admixture used by the building materials in the building market is made of one or two materials, has the problems of substandard strength activity, higher hydration heat, poor sulfate corrosion resistance, poor mortar fluidity, poor pumping performance, poor concrete water retention and the like, and can generate a large amount of industrial waste residues in the industrial production process such as iron making, thermal power generation and the like, and can generate great influence on the natural environment if the industrial waste residues cannot be treated properly.
How to apply industrial waste residues and a large amount of powdery mineral aggregates existing in nature to the construction industry is an effective waste treatment means which accords with the environment-friendly construction principle of green environmental protection, low carbon and waste recycling, so the invention provides a method to solve the problems.
Disclosure of Invention
The present invention is directed to a method for producing a concrete complex mineral admixture to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for producing a concrete complex mineral admixture comprises the following steps:
the method comprises the following steps: selecting magnetic metal in the mixed slag raw material A by using a magnetic separation method;
step two: the mixed slag raw material A is put into a vertical mill for grinding, and after grinding is finished, a drying machine is used for drying, and a powder slag raw material B is selected by a powder separator;
step three: putting the raw material C into a grinder for grinding, and selecting and grading the raw material D by a pneumatic grading method after grinding;
step four: adding the powdery slag raw material B, the classified raw material D and the raw material E into a stirrer, and mixing, stirring and stirring to obtain a finished product F;
step five: and weighing the finished product F quantitatively, and performing sampling inspection to obtain the finished product concrete composite mineral admixture.
Further, the mixed raw slag material A in the first step comprises 20-30wt% of granulated blast furnace slag, 20-30wt% of silica fume, 10-20wt% of volcanic ash, 10-20wt% of quartz powder and 2-5wt% of composite excitant.
Furthermore, the compound excitant comprises 40-50wt% of aluminum sulfate slag, 10-15wt% of sodium chloride, 10-10wt% of alum, 15-19wt% of sodium sulfate and 1-2wt% of triisopropanolamine.
Furthermore, the raw material C in the third step is fly ash, and the classified raw material D after the pneumatic classification treatment is fly ash with the particle diameter of 5-8 μm.
Further, the particle diameter size of the powdery raw slag material B in the second step is 12 to 19 μm.
Further, the raw material D in the fourth step is portland cement with a particle diameter of 15-20 μm, and the mixing ratio of the powdery slag raw material B, the classification raw material D and the raw material E is 2.
Compared with the prior art, the invention has the beneficial effects that:
(1) The method for producing the concrete complex mineral admixture is characterized in that the admixture mainly comprising the industrial waste residue is applied to the concrete in a large amount, which means that the environmental pollution of the industrial waste residue and the land resource waste are reduced in the production of the concrete, and the consumption of the cement in the cementing material is reduced, so that the energy, resource and environmental pollution caused by the production of the cement are indirectly reduced.
(2) Compared with the traditional building admixture, the method for producing the concrete composite mineral admixture has the characteristics of high activity index, strong durability, strong fluidity, good strength, low hydrothermal degradation and the like, and most importantly, the method is good in environmental protection, nontoxic and harmless and is safe to health and environment.
Drawings
FIG. 1 is a temperature-time diagram of a hydrothermal digestion test according to the present invention;
FIG. 2 is a graph showing the results of impact resistance and abrasion resistance tests according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one of the figures, it will not need to be further discussed or illustrated in detail in the description of the figures that follows.
Examples
Before the production of the concrete composite mineral admixture, the effect of the admixture in concrete needs to be known, and the chemical composition and characteristics of the mineral admixture determine that the mineral admixture not only has good filling and compacting effects and micro-aggregate effects, but also has different surface adsorption effects and pozzolanic activities in concrete. The functions can improve the internal pore structure of the concrete, influence the hydration process of the concrete gelling component, coordinate the strength development of the concrete, effectively improve the composition and structure of a hydration product, optimize the structure and performance of an internal interface transition zone of the concrete, and finally improve the comprehensive performance of the concrete.
As shown in fig. 1-2, the present invention provides a technical solution: a method for producing a concrete complex mineral admixture comprises the following steps:
the method comprises the following steps: selecting magnetic metal from mixed slag raw material A by using a magnetic separation method, wherein the mixed slag raw material A comprises 20-30wt% of granulated blast furnace slag, 20-30wt% of silica fume, 10-20wt% of volcanic ash, 10-20wt% of quartz powder and 2-5wt% of composite excitant, the composite excitant comprises 40-50wt% of aluminum sulfate slag, 10-15wt% of sodium chloride, 10-10wt% of alum, 15-19wt% of sodium sulfate and 1-2wt% of triisopropanolamine, and the magnetic separation method is used for separating the magnetic metal from the mixed slag raw material A in cement productionThe composite excitant can raise strength, especially later strength, shorten setting time and improve stability, and under the condition of same cement strength, the excitant can reduce the consumption of raw material, in which the silica powder has strong pozzolanic activity, and after the silica powder is mixed into the mortar, the silica powder granules are contacted with water, and some small granules are quickly dissolved, and the solution is rich in Si2 and poor in Ca 2+ The gel forms an adhesion layer on the surface of the silicon powder particles, and after a certain time, the silica-rich silica gel is rich in SiO 2 Poor Ca 2 The gel adhesion layer begins to dissolve and reacts with calcium hydroxide produced by cement hydration to produce CSH gel. The pozzolanic reaction of silica fume results in a change in the pore structure of the slurry, resulting in a reduction in macropores (greater than 0.1 microns), an increase in micropores (less than 0.05 microns), a reduction in pore size, and a reduction in ca (OH) content of the slurry 2 And (4) reducing and refining crystals. The orientation degree of the slurry is weakened, and the fine-particle silicon powder is filled in gaps of cement particles, so that the slurry is more compact;
step two: the mixed slag raw material A is put into a vertical mill for grinding, and after grinding is finished, a powder slag raw material B is dried by a dryer and selected by a powder separator, wherein the particle diameter of the powder slag raw material B is 12-19 mu m;
step three: and (2) putting the raw material C into a grinder for grinding, selecting the graded raw material D by a pneumatic grading method after grinding, wherein the raw material C is fly ash, the graded raw material D after pneumatic grading treatment is fly ash with the particle diameter of 5-8 mu m, and the activity filling behavior of the fly ash can be fully exerted in the later stage of the mortar. In the hardening development stage and the hardening early stage, the function of the physical filling material is mainly exerted in the hardening later stage after hardening, and the function of the active filling material is also exerted. Due to the filling action of the fly ash, the internal pores of the mortar, particularly the channels of capillary pores in the slurry, can be reduced, which is very beneficial to improving the impermeability of the mortar. Some scholars refer to the filling and compacting effect as the 'particle effect' of 'pore refining';
step four: adding a powdery slag raw material B, a grading raw material D and a raw material E into a stirrer, mixing and stirring to obtain a finished product F, wherein the raw material D is portland cement with the particle diameter of 15-20 mu m, and the mixing ratio of the powdery slag raw material B to the grading raw material D to the raw material E is 2;
step five: and (5) carrying out quantitative weighing and sampling inspection on the finished product F to obtain the finished product concrete composite mineral admixture.
It should be noted that the content of the spot check in the fifth step includes quantitative monitoring to avoid unnecessary loss caused by errors in the quantitative determination, and also includes moisture monitoring, wherein the moisture content of the finished concrete complex mineral admixture leaving the factory is less than 1%
It should be noted that, in the process of synthesizing the concrete composite mineral admixture, the water demand test formula is as follows:
in the formula: x represents water demand in percent; l1 represents the water adding amount when the fluidity of the test mortar reaches 130mm-140mm, and the unit is milliliter; 125 represents the unit of water addition for the comparative mortar in milliliters.
It is noted that the concrete composite mineral admixture produced was subjected to hydrothermal test, and hydrothermal test means the heat released when the substance was hydrated, and as shown in FIG. 1, the change of hydrothermal temperature of the concrete composite mineral admixture and the change of hydrothermal temperature of the conventional portland cement aged for 18 days were shown, so that it could be found that the degree of hydrothermal test was lower than that of the conventional portland cement.
It should be noted that, in order to show the good wear resistance of the concrete composite mineral admixture, the results of the impact resistance and wear resistance tests performed on the finished plate of the concrete composite mineral admixture are shown in fig. 2, and in the subsequent tests, a freeze-thaw resistance test, a drying shrinkage test, a permeability and water absorption test and an acid and alkali resistance test are sequentially performed to detect whether each index of the finished plate reaches the standard, so as to determine the application range of each raw material.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method for producing a concrete complex mineral admixture, characterized in that: the production method comprises the following steps:
the method comprises the following steps: selecting magnetic metal in the mixed slag raw material A by using a magnetic separation method;
step two: the mixed slag raw material A is put into a vertical mill for grinding, and after grinding is finished, a powder-shaped slag raw material B is selected by a powder selector through a dryer for drying;
step three: putting the raw material C into a grinder for grinding, and selecting and grading the raw material D by a pneumatic grading method after grinding;
step four: adding the powdery slag raw material B, the classified raw material D and the raw material E into a stirrer to be mixed, stirred and stirred to obtain a finished product F;
step five: and weighing the finished product F quantitatively, and performing sampling inspection to obtain the finished product concrete composite mineral admixture.
2. A method of producing a concrete complex mineral admixture according to claim 1 wherein: the mixed slag raw material A in the first step comprises 20-30wt% of granulated blast furnace slag, 20-30wt% of silica fume, 10-20wt% of volcanic ash, 10-20wt% of quartz powder and 2-5wt% of compound excitant.
3. The method of claim 2, wherein the mineral admixture for concrete is selected from the group consisting of: the compound excitant comprises 40-50wt% of aluminum sulfate slag, 10-15wt% of sodium chloride, 10-10wt% of alum, 15-19wt% of sodium sulfate and 1-2wt% of triisopropanolamine.
4. The method of claim 1, wherein the mineral admixture for concrete is selected from the group consisting of: the raw material C in the third step is fly ash, and the grading raw material D after the pneumatic grading treatment is fly ash with the particle diameter of 5-8 mu m.
5. The method of claim 1, wherein the mineral admixture for concrete is selected from the group consisting of: the particle diameter of the powdery slag raw material B in the second step is 12 to 19 μm.
6. The method of claim 1, wherein the mineral admixture for concrete is selected from the group consisting of: the raw material D in the fourth step is portland cement with the particle diameter of 15-20 μm, and the mixing ratio of the powdery slag raw material B, the classified raw material D and the raw material E is 2.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367631A (en) * | 2008-09-27 | 2009-02-18 | 天津水泥工业设计研究院有限公司 | Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof |
| CN102826779A (en) * | 2012-09-20 | 2012-12-19 | 四川省金桂兰水泥有限责任公司 | Concrete complex mineral admixture and preparation technology thereof |
| CN111233364A (en) * | 2020-03-06 | 2020-06-05 | 广州市圣丰混凝土有限公司 | Composite mineral admixture, preparation method thereof and artificial sand concrete material containing composite mineral admixture |
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- 2021-08-18 CN CN202110948783.6A patent/CN115707669A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367631A (en) * | 2008-09-27 | 2009-02-18 | 天津水泥工业设计研究院有限公司 | Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof |
| CN102826779A (en) * | 2012-09-20 | 2012-12-19 | 四川省金桂兰水泥有限责任公司 | Concrete complex mineral admixture and preparation technology thereof |
| CN111233364A (en) * | 2020-03-06 | 2020-06-05 | 广州市圣丰混凝土有限公司 | Composite mineral admixture, preparation method thereof and artificial sand concrete material containing composite mineral admixture |
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