CN108947396A - A kind of fiber-steel ground-slag enhancing concrete and preparation method thereof - Google Patents
A kind of fiber-steel ground-slag enhancing concrete and preparation method thereof Download PDFInfo
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- CN108947396A CN108947396A CN201810890165.9A CN201810890165A CN108947396A CN 108947396 A CN108947396 A CN 108947396A CN 201810890165 A CN201810890165 A CN 201810890165A CN 108947396 A CN108947396 A CN 108947396A
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- slag
- parts
- fiber
- steel
- steel ground
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- 239000002893 slag Substances 0.000 title claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000004567 concrete Substances 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 44
- 239000004568 cement Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims description 16
- -1 polypropylene Polymers 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 238000009628 steelmaking Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000006028 limestone Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000012615 aggregate Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005336 cracking Methods 0.000 abstract description 7
- 230000008602 contraction Effects 0.000 abstract description 3
- 230000015271 coagulation Effects 0.000 abstract description 2
- 238000005345 coagulation Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 238000010348 incorporation Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000001976 improved effect Effects 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of fiber-steel ground-slag enhancing concrete and preparation method thereof, and the coagulation local soil type is at including cement 250-350 parts, 140-200 parts of steel ground-slag, 600-750 parts of fine aggregate, 1000-1200 parts of coarse aggregate, 3-20 parts of additive, 130-150 parts of water, 0.6-162 parts of fiber.The present invention simultaneously will be in steel ground-slag and fiber incorporation concrete, utilize the good compensation blockage effect of steel ground-slag, and binding fiber has good effect of contraction to concrete shrinkage, to generate " synergistic effect ", concrete is made to have good cracking resistance.
Description
Technical field
The invention belongs to the field of building materials, it is related to a kind of fiber-steel ground-slag enhancing concrete and preparation method thereof.
Background technique
To protect environment, reducing the consumption of natural resources, while cement concrete performance is improved, in production cement or coagulation
Concrete admixture can be added when native.Concrete admixture is to the mechanical property of concrete, working performance, erosion-resisting characteristics and resistance to
Many performances such as long performance are significantly improved effect, are the indispensable structural constituents of contemporary high performance concrete.Steel slag is
The solid waste being discharged in steelmaking process, annual China can all discharge a large amount of steel slag, not only seriously polluted environment but also occupied soil
Ground, therefore, there is an urgent need to carry out minimizing, secondary resource to steel slag and efficiently utilize.C is rich in steel slag3S and C2The mines such as S
Object is similar to Portland clinker inferior, has potential of the exploitation as cement and concrete production raw material.But individually make
Steel slag is used to there is a problem of that early strength is low as concrete admixture.
Blast-furnace cinder is the industrial residue discharged in blast furnace ironmaking production process, is the fusant based on calcium silicates, warp
Water quenching is condensed into shot-like particle.Its chemical analysis is mainly SiO2、CaO、A12O3、Fe2O3Deng as clinker, with potential
Hydration activity.After slag micropowder mixes concrete, the workabilities such as pumping, the slump-loss of concrete can be improved, improved
The later strength of concrete has good durability, corrosion resistance and wearability.But slag is used to deposit as concrete doping material
Concrete shrinkage it is larger, be also easy to produce the defect of cracking, so as to cause concrete strength deterioration and durability decline.
Summary of the invention
Based on this, the present invention provides a kind of fiber-steel ground-slag enhancing concrete and preparation method thereof, the fiber-steel
Ground-slag, which enhances concrete, has very high early strength and later strength, while not easy to crack, shrinks small, preparation method operation
Simply, cost is relatively low.
Fiber of the present invention-steel ground-slag enhancing concrete composition includes: 250-350 parts of cement, steel ground-slag
140-200 parts, 600-750 parts of fine aggregate, 1000-1200 parts of coarse aggregate, 3-20 parts of additive, 130-150 parts of water, fiber 0.6-
162 parts.
Compared with the existing technology, the present invention simultaneously mixes steel ground-slag and fiber in concrete, good using steel ground-slag
Good compensation blockage effect, and binding fiber has good effect of contraction to concrete shrinkage, to generate " superposition effect
Answer ", make concrete that there is good cracking resistance.
Further, the fiber includes 0-160 parts of steel fibre, and 0-2 parts of polypropylene fibre, steel fibre and polypropylene fibre are not
It is simultaneously 0.
Further, the steel ground-slag includes 30%-50% steel-making slag powder and 50-70% slag powders.
Further, the strength of cement grade reaches PO42.5R and the above label.
Further, the fine aggregate fineness modulus is 2.6-3.5.
Further, the coarse aggregate includes the continuous grading limestone gravel that partial size is 4.75-26.5mm, and water absorption rate is
0.1-1.5%, crush values index are 5-15%.
Further, the additive includes 3-10 parts of water-reducing agents and 0-10 parts of exciting agents.
Further, the water-reducing agent is polycarboxylate high-efficiency water reducing agent, and water-reducing rate is not less than 25%, and compressive strength rate is not
Less than 110%.
The present invention also provides above-mentioned fiber-steel ground-slag enhancing concrete preparation methods, comprising the following steps: by rough set
Cement and steel ground-slag is added after material and fine aggregate mixing, fiber is then added, adds water and additive is uniformly mixing to obtain
Fresh concrete finally conserved fresh concrete under conditions of 20 DEG C, 90% or more relative humidity to regulation age, wherein
250-350 parts of cement, 140-200 parts of steel ground-slag, 600-750 parts of fine aggregate, 1000-1200 parts of coarse aggregate, additive 3-20
Part, 130-150 parts of water, 0.6-162 parts of fiber.
Further, the fiber includes 0-160 parts of steel fibre, and 0-2 parts of polypropylene fibre, steel fibre and polypropylene fibre are not
It is simultaneously 0；The steel ground-slag includes 30%-50% steel-making slag powder and 50-70% slag powders.
Detailed description of the invention
Fig. 1 is cement paste chemical shrinkage comparison diagram；
Fig. 2 is concrete shrinkage comparison diagram.
Specific embodiment
The present invention, using the synergistic effect of the two, is significantly mentioned by mixing steel ground-slag and fiber simultaneously in concrete
The cracking resistance of high concrete illustrates technical solution of the present invention below by way of specific embodiment.
Fiber of the present invention-steel ground-slag enhancing concrete composition includes 250-350 parts of cement, steel ground-slag 140-
200 parts, 600-750 parts of fine aggregate, 1000-1200 parts of coarse aggregate, 3-20 parts of additive, 130-150 parts of water, fiber 0.6-162
Part.Raw material is weighed according to the content of each component in following table 1-6,30s first is mixed in coarse aggregate and fine aggregate, is then added
Cement and steel ground-slag stir 30s, are subsequently added into fiber and continue to stir 30s, add 4/5 water and additive stirring 120s, most
After remaining 1/5 water adjustment mixture is added, fresh concrete is made.By fresh concrete 20 DEG C, relative humidity 90% with
Maintenance extremely regulation age under conditions of upper.
Embodiment 1
<table 1>
Embodiment 2
<table 2>
Embodiment 3
<table 3>
Embodiment 4
<table 4>
Comparative example 1
<table 5>
Comparative example 2
<table 6>
Table 7 is please referred to, which reflects the chemical component of steel ground-slag used in the present invention.Steel ground-slag packet used in the present invention
Steel-making slag powder and slag powders are included, wherein steel-making slag powder mainly includes CaO, Fe2O3、SiO2Equal ingredients, slag powders mainly include CaO,
SiO2、Al2O3, MgO etc..
<table 7>
| Chemical component | CaO | SiO2 | Al2O3 | Fe2O3 | MgO | f-CaO | SO3 |
| Steel-making slag powder | 43.59 | 14.56 | 1.52 | 22.45 | 7.36 | 4.75 | 0.39 |
| Slag powders | 35.85 | 32.34 | 16.22 | 0.65 | 10.88 | ∥ | 3.55 |
According to GB/T 50081-2002 " standard for test methods of mechanical properties of ordinary concrete " to embodiment 1-4 and right
Concrete made from ratio 1-2 carries out mechanical property test, as a result as follows:
<table 8>
Table 8 reflects, adds fiber after adulterating steel ground-slag in concrete, the 7d compression strength of resulting concrete can
Reach comparative example 1 using the 83%-95% of the concrete of striaght cement preparation, 28d compression strength reaches the 84%- of comparative example 1
98%, 28d tensile splitting strength reach the 110%-135% of comparative example 1, and tensile pressure ratio significantly improves.
Further, with only doped with steel ground-slag but without adulterate fiber comparative example 2 compared with, the fiber-of embodiment 1-4
Steel ground-slag enhances concrete after adulterating steel ground-slag, although adding steel fibre or the polypropylene fibre slump is dropped
Low, mobility slightly weakens, but significantly enhances the compression strength of concrete, especially embodiment 2 and embodiment 3
7d compression strength improves 8.4% and 1.2% than comparative example 2 respectively, and the 28d compressive strength rate comparative example 2 of embodiment 1 improves
10%.Tensile splitting strength and tensile pressure ratio that fiber also significantly improves concrete are adulterated simultaneously, such as embodiment 1 and embodiment 2
28d tensile splitting strength improves 65% and 55%, the 28d tensile pressure ratio difference of embodiment 1 and embodiment 2 than comparative example 2 respectively
51% and 66% are improved than comparative example 2.
Fig. 1 is please referred to, which is cement paste chemical shrinkage comparison diagram.It will be seen from figure 1 that with pure water cement paste phase
Than adding steel slag iron powder and significantly reducing cement paste chemical shrinkage, be conducive to the cracking resistance for improving cement-based material.
Fig. 2 is please referred to, which is concrete shrinkage comparison diagram.Figure it is seen that compared with striaght cement (comparative example 1),
The drying shrinkage of concrete can be significantly reduced by adding steel slag iron powder and fiber, be conducive to the cracking resistance for improving cement-based material.
Compared with the existing technology, the present invention simultaneously mixes steel ground-slag and fiber in concrete, good using steel ground-slag
Good compensation blockage effect, and binding fiber has good effect of contraction to concrete shrinkage, to generate " superposition effect
Answer ", the compression strength and tensile splitting strength of concrete are enhanced, while improving the tensile pressure ratio of concrete, and reducing
It learns and shrinks, improve the cracking resistance of concrete significantly, the early strength for effectively solving to generate using steel-making slag powder is low and sharp
The problem easy to crack generated with slag powders.Promote the resource utilization rate to metallurgical slag waste simultaneously, reduces production cost.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (10)
1. a kind of fiber-steel ground-slag enhances concrete, it is characterised in that: including 250-350 parts of cement, steel ground-slag 140-
200 parts, 600-750 parts of fine aggregate, 1000-1200 parts of coarse aggregate, 3-20 parts of additive, 130-150 parts of water, fiber 0.6-162
Part.
2. fiber-steel ground-slag enhances concrete according to claim 1, it is characterised in that: the fiber includes steel fibre
0-160 parts, 0-2 parts of polypropylene fibre, steel fibre and polypropylene fibre are not 0 simultaneously.
3. fiber-steel ground-slag enhances concrete according to claim 2, it is characterised in that: the steel ground-slag includes
30%-50% steel-making slag powder and 50-70% slag powders.
4. fiber-steel ground-slag enhances concrete according to claim 3, it is characterised in that: the strength of cement grade reaches
To PO42.5R and the above label.
5. fiber-steel ground-slag enhances concrete according to claim 4, it is characterised in that: the fine aggregate fineness modulus
For 2.6-3.5.
6. fiber-steel ground-slag enhances concrete according to claim 5, it is characterised in that: the coarse aggregate includes partial size
For the continuous grading limestone gravel of 4.75-26.5mm, water absorption rate 0.1-1.5%, crush values index is 5-15%.
7. fiber-steel ground-slag enhances concrete according to claim 6, it is characterised in that: the additive includes 3-10
Part water-reducing agent and 0-10 parts of exciting agents.
8. fiber-steel ground-slag enhances concrete according to claim 7, it is characterised in that: the water-reducing agent is polycarboxylic acids
Salt high efficiency water reducing agent, water-reducing rate are not less than 25%, and compressive strength rate is not less than 110%.
9. a kind of fiber-preparation method of steel ground-slag enhancing concrete, it is characterised in that the following steps are included: by coarse aggregate and
Cement and steel ground-slag is added after fine aggregate mixing, fiber is then added, adds water and additive is uniformly mixing to obtain and newly mixes
Concrete finally conserves fresh concrete to age is provided, wherein cement under conditions of 20 DEG C, 90% or more relative humidity
250-350 parts, 140-200 parts of steel ground-slag, 600-750 parts of fine aggregate, 1000-1200 parts of coarse aggregate, 3-20 parts of additive, water
130-150 parts, 0.6-162 parts of fiber.
10. fiber-steel ground-slag enhancing concrete preparation method according to claim 9, it is characterised in that: the fiber
Including 0-160 parts of steel fibre, 0-2 parts of polypropylene fibre, steel fibre and polypropylene fibre are not 0 simultaneously；The steel ground-slag packet
Include 30%-50% steel-making slag powder and 50-70% slag powders.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810890165.9A CN108947396A (en) | 2018-08-07 | 2018-08-07 | A kind of fiber-steel ground-slag enhancing concrete and preparation method thereof |
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| CN201810890165.9A CN108947396A (en) | 2018-08-07 | 2018-08-07 | A kind of fiber-steel ground-slag enhancing concrete and preparation method thereof |
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Family
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| CN201810890165.9A Pending CN108947396A (en) | 2018-08-07 | 2018-08-07 | A kind of fiber-steel ground-slag enhancing concrete and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110919820A (en) * | 2019-12-17 | 2020-03-27 | 樊杰俊 | Production process of concrete composite self-heat-insulation brick building block |
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-
2018
- 2018-08-07 CN CN201810890165.9A patent/CN108947396A/en active Pending
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Application publication date: 20181207 |