CN110395926A - A kind of steel-slag mixture and preparation method thereof and Creep Characteristics detection method - Google Patents
A kind of steel-slag mixture and preparation method thereof and Creep Characteristics detection method Download PDFInfo
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- CN110395926A CN110395926A CN201910731134.3A CN201910731134A CN110395926A CN 110395926 A CN110395926 A CN 110395926A CN 201910731134 A CN201910731134 A CN 201910731134A CN 110395926 A CN110395926 A CN 110395926A
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- slag mixture
- aggregate
- slag
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
-
- 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
Abstract
The invention discloses a kind of steel-slag mixture and preparation method thereof, application and Creep Characteristics detection methods, belong to waste utilization and the field of building materials.The preparation method of the steel-slag mixture obtains fine aggregate, middle aggregate, coarse aggregate the following steps are included: first sieve to steel slag, spare；Then, following components is weighed: fine aggregate, middle aggregate, coarse aggregate, miberal powder and water, it is spare；Then, above-mentioned weighed each component is mixed, is placed in sealing space after carrying out stewing material processing, be stirred for uniformly, steel-slag mixture can be obtained.Steel-slag mixture intensity provided by the invention is high, by water content, miberal powder dosage and the reasonable accounting for controlling different-grain diameter aggregate in steel slag aggregate in control steel-slag mixture, can reduce the Creep Coefficient of steel-slag mixture.In addition, Creep Characteristics detection method provided by the invention, easy to operate, the accuracy of detection is high, can react the Creep Coefficient changing rule of steel-slag mixture well.
Description
Technical field
The present invention relates to waste utilization and the field of building materials, specifically a kind of steel-slag mixture and preparation method thereof and Xu
Become method for testing performance.
Background technique
Steel slag is one of steelmaking process byproduct, is by impurity materials such as silicon, manganese, phosphorus, sulphur in iron in melting
The various oxides being oxidized in the process, and composed by the salt generated with solvent reaction.Wherein steel slag is containing there are many useful
Ingredient, for example iron oxide, calcium oxide, silica, magnesia, aluminium oxide and tricalcium silicate etc..
Currently, in the prior art, having the admixture by using steel slag as production concrete, so that steel slag be allow to obtain
To recycling.However, at present using steel slag as the concrete of raw material, since water content is higher, and mixed with more cement,
The ratio of mud is higher, so that the process water remained inside it after concrete coagulation hardening is more, and the volatilization of water and constantly ease
Gap can out generated more and more, so that the Creep Coefficient that will lead to concrete becomes larger.
Summary of the invention
The purpose of the present invention is to provide a kind of steel-slag mixtures and preparation method thereof and Creep Characteristics detection method, with solution
Certainly the problems mentioned above in the background art.
To achieve the above object, the embodiment of the present invention provides the following technical solutions:
A kind of preparation method of steel-slag mixture, comprising the following steps:
(1) steel slag is sieved, obtains fine aggregate, middle aggregate, coarse aggregate, it is spare；The partial size of the fine aggregate is greater than
0mm, and it is less than 5mm；The partial size of the middle aggregate is not less than 5mm, and is not more than 10mm；The partial size of the coarse aggregate is greater than
10mm, but it is not more than 20mm；
(2) according to mass fraction meter, following components is weighed: fine aggregate 28%-43%, middle aggregate 20%-25%, coarse aggregate
The mass fraction adduction of 28%-33%, miberal powder 4%-8%, water 5%-6%, each component are 100%, spare；
(3) above-mentioned weighed each component is mixed, is placed in sealing space after carrying out stewing material processing, is stirred for
Uniformly, steel-slag mixture is obtained.
A kind of preferred embodiment used in the embodiment of the present invention, the density of the steel slag are (3-3.5) × 103kg/m3。
Another kind preferred embodiment used in the embodiment of the present invention, the quality accounting of calcium oxide is 40%- in the miberal powder
60%.
Another kind preferred embodiment used in the embodiment of the present invention, the quality accounting of silica is 15%- in the miberal powder
25%.
Another kind preferred embodiment used in the embodiment of the present invention, in the step (3), the time for boiling in a covered pot over a slow fire material processing is 8-
15h。
The embodiment of the invention also provides a kind of using steel-slag mixture made from above-mentioned preparation method.
The embodiment of the invention also provides a kind of above-mentioned steel-slag mixtures to prepare the application in construction material.
The embodiment of the invention also provides a kind of Creep Characteristics detection methods of above-mentioned steel-slag mixture comprising following step
It is rapid:
S1, first with lubricator the inner wall of mold is smeared, then steel-slag mixture is added in mold；
S2, the steel-slag mixture in mold is pressed, after molding, then is demoulded, obtains forming blocks；
S3, sprinkling maintenance first is carried out to forming blocks, then forming blocks immersion is subjected to soaked maintenance in water, is tested
Block；
S4, test block is subjected to unconfined compressive strength test, obtains the failing load of test block；
S5, the failing load according to test block apply external force to test block, and continue an age, and measurement is tested
The initial deformation value and total deformation value of block；
S6, initial deformation value and total deformation value according to test block, are calculated the Creep Coefficient of the age test block.
Another kind preferred embodiment used in the embodiment of the present invention, the lubricant are vaseline or machine oil.
Another kind preferred embodiment used in the embodiment of the present invention, in the step S2, after forming 18-30h, then is taken off
Mould.
Another kind preferred embodiment used in the embodiment of the present invention, in the step S3, after demoulding 18-30h, to forming blocks
Carry out sprinkling maintenance.
Another kind preferred embodiment used in the embodiment of the present invention, in the step S3, the time of sprinkling maintenance is 5-7
It, the time of soaked maintenance is 18-30h.
Another kind preferred embodiment used in the embodiment of the present invention, in the step S5, the external force applied to test block is
0.3-0.5 times of the failing load of test block.
Compared with prior art, the beneficial effect of the embodiment of the present invention is:
(1) steel-slag mixture intensity provided in an embodiment of the present invention is high, may be used as in construction materials such as pavement constructions,
By water content and miberal powder dosage in control steel-slag mixture, the Creep Coefficient of steel-slag mixture can be reduced；In addition, this hair
Bright embodiment also passes through the accounting for rationally controlling different-grain diameter aggregate in steel slag aggregate, can also reduce creeping for steel-slag mixture
Coefficient.
(2) Creep Characteristics detection method provided in an embodiment of the present invention, easy to operate, the accuracy of detection is high, can be very
The Creep Coefficient changing rule of steel-slag mixture is reacted well.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
This embodiment offers a kind of steel-slag mixtures and preparation method thereof comprising following steps:
(1) steel slag is sieved, obtains fine aggregate, middle aggregate, coarse aggregate, and to fine aggregate, middle aggregate, coarse aggregate into
Row is dried, until the quality of fine aggregate, middle aggregate, coarse aggregate be no longer changed (fine aggregate after drying process, in
Aggregate, coarse aggregate are canescence), it is spare；Wherein, the partial size of the fine aggregate is greater than 0mm, and is less than 5mm；The middle aggregate
Partial size be not less than 5mm, and be not more than 10mm；The partial size of the coarse aggregate is greater than 10mm, but is not more than 20mm；In addition, steel slag
The oxidisability steel slag (displaying the phase at least more than half a year) provided for Tangshan steel Co., Ltd, density are 3 × 103kg/
m3。
(2) fine aggregate of 2240g, the middle aggregate of 2000g, the coarse aggregate of 2640g, the miberal powder of 640g and 480g are weighed
Water, it is spare；Wherein, miberal powder is miberal powder provided by the Haas gram laboratory of Tangshan steel Construction Company Limited；In addition, the miberal powder
The quality accounting of middle calcium oxide is 40%, and the quality accounting of silica is 15% in miberal powder.Wherein, the additive amount of water is to pass through
What compaction test was determined.
Specific step is as follows for compaction test: according to the content of the fine aggregate of said ratio, middle aggregate, coarse aggregate and miberal powder
It will add water rate that water is successively added to be adapted to every group of amount of water since 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7% and carry out mark
Note.And boil in a covered pot over a slow fire and expect that the time is 12 hours, to prevent moisture evaporation loss, the mixture after adding water to mix is covered with preservative film
Lid sealing is tight.It adds miberal powder again before compaction test starts and carries out compaction test after mixing evenly, wherein this test is using weight
Type compaction test, debugging compaction test apparatus carry out compaction test after all going well.It hits real bucket inner wall and lower lock block smears vaseline, Gu
Surely real bucket is hit, is set hammer number 98 times, point three layers of sample carry out hitting reality, and every layer uniformly carries out filler.It is suitable when first layer charges
When fill out more prevent the coarse aggregate of bottom to be crashed to pieces, every layer of specimen height is preferably equal.The last layer hit it is real when completing, beyond hitting reality
The specimen height on bucket top should be less than 6mm, should cancel beyond the excessive test specimen of height, so must guarantee the number of the last layer filler
Amount.Hit it is real after the completion of remove and hit real bucket and strike off the extra mixture in top.It pours out the mixture hit in real bucket and claims weight in wet base at this time,
It marks to be put into drying box and be dried, it is found through experiment that quality is no longer changed at this time it is believed that mixing after 4 hours
Moisture-free in expecting.Calculate separately every group of wet density and dry density and to corresponding water content and amount of water.According to wet close
Degree calculates the quality of proportioning test block and the quality of every kind of ingredient, obtains optimal water content, so that it is determined that the quality of addition water
Range.
(3) above-mentioned weighed each component is mixed, is placed in basin, is sealed with preservative film, then carried out
After stewing material processing 8h, it is stirred for uniformly, steel-slag mixture can be obtained.The steel-slag mixture can be used as the building such as pavement construction
Material.
Embodiment 2
This embodiment offers a kind of steel-slag mixtures and preparation method thereof comprising following steps:
(1) steel slag is sieved, obtains fine aggregate, middle aggregate, coarse aggregate, and to fine aggregate, middle aggregate, coarse aggregate into
Row is dried, until the quality of fine aggregate, middle aggregate, coarse aggregate be no longer changed (fine aggregate after drying process, in
Aggregate, coarse aggregate are canescence), it is spare；Wherein, the partial size of the fine aggregate is greater than 0mm, and is less than 5mm；The middle aggregate
Partial size be not less than 5mm, and be not more than 10mm；The partial size of the coarse aggregate is greater than 10mm, but is not more than 20mm；In addition, steel slag
The oxidisability steel slag (displaying the phase at least more than half a year) provided for Tangshan steel Co., Ltd, density be 3.5 ×
103kg/m3。
(2) fine aggregate of 3440g, the middle aggregate of 1600g, the coarse aggregate of 2240g, the miberal powder of 320g and 400g are weighed
Water, it is spare；Wherein, miberal powder is miberal powder provided by the Haas gram laboratory of Tangshan steel Construction Company Limited；In addition, the miberal powder
The quality accounting of middle calcium oxide is 60%, and the quality accounting of silica is 25% in miberal powder.
(3) above-mentioned weighed each component is mixed, is placed in basin, is sealed with preservative film, then carried out
After stewing material processing 15h, it is stirred for uniformly, steel-slag mixture can be obtained.The steel-slag mixture can be used as pavement construction etc. and build
Build material.
Embodiment 3
This embodiment offers a kind of steel-slag mixtures and preparation method thereof comprising following steps:
(1) steel slag is sieved, obtains fine aggregate, middle aggregate, coarse aggregate, and to fine aggregate, middle aggregate, coarse aggregate into
Row is dried, until the quality of fine aggregate, middle aggregate, coarse aggregate be no longer changed (fine aggregate after drying process, in
Aggregate, coarse aggregate are canescence), it is spare；Wherein, the partial size of the fine aggregate is greater than 0mm, and is less than 5mm；The middle aggregate
Partial size be not less than 5mm, and be not more than 10mm；The partial size of the coarse aggregate is greater than 10mm, but is not more than 20mm；In addition, steel slag
The oxidisability steel slag (displaying the phase at least more than half a year) provided for Tangshan steel Co., Ltd, density be 3.3 ×
103kg/m3。
(2) fine aggregate of 3200g, the middle aggregate of 1640g, the coarse aggregate of 2240g, the miberal powder of 480g and 440g are weighed
Water, it is spare；Wherein, miberal powder is miberal powder provided by the Haas gram laboratory of Tangshan steel Construction Company Limited；In addition, the miberal powder
The quality accounting of middle calcium oxide is 50%, and the quality accounting of silica is 20% in miberal powder.
(3) above-mentioned weighed each component is mixed, is placed in basin, is sealed with preservative film, then carried out
After stewing material processing 12h, it is stirred for uniformly, steel-slag mixture can be obtained.The steel-slag mixture can be used as pavement construction etc. and build
Build material.
Embodiment 4
This embodiment offers a kind of Creep Characteristics detection methods of above-mentioned steel-slag mixture comprising following steps:
(1) first with lubricator the inner wall of mold is smeared, then adds steel-slag mixture made from above-described embodiment 3
It is added in mold；Specifically, lubricant can select vaseline, it is highly the circle of 150mm that it is 150mm that diameter, which can be selected, in mold
Column type mold.In addition, toward mold addition steel-slag mixture when, need in three times uniformly to pour into steel-slag mixture mold it
In, to prevent from segregation phenomenon occur during material filling, wherein after uniformly pouring into for the first time, it is mixed that steel slag is gently tapped with small punty
Material is closed, places steel-slag mixture uniformly in mold；The steel-slag mixture poured into for the second time is once fewer than preceding, is finished down
Similarly steel-slag mixture is placed uniformly with small punty afterwards；Steel-slag mixture is filled uniformly in mold by third time.
(2) mold obtained above equipped with steel-slag mixture is put into press machine, to the steel-slag mixture in mold
It is pressed, after forming 18h, then is demoulded with hydraulic ejection device, the experiment block of abjection is handled with care, it is important to note that not
The edge of test block is touched, test block at this time without intensity, obtains forming blocks substantially；Wherein, the loaded value of press machine is
1300kN。
(3) after demoulding 18h, forming blocks are carried out sprinkling maintenance 5 days, daily morning and at night each pair of forming blocks carry out equal
Even watering is primary；After sprinkling maintenance, then forming blocks are impregnated and carry out soaked maintenance 18h in water, creeping property can be obtained
It can the required test block of detection.
(4) test block is tested using the unconfined compressive strength that strain controlling formula unconfined compression apparatus carries out 7 day age,
The failing load for obtaining 7 day age test block is that 73.2kN (pays attention to guaranteeing loading speed when carrying out unconfined compressive strength
Consistency, the accuracy of guarantee test result).
(5) according to the failing load of test block, external force is applied to test block with spring Creep Apparatus, and continue an age
Phase measures the initial deformation value and total deformation value of test block with digital display displacement measurement.
(6) according to the initial deformation value of test block and total deformation value, the Creep Coefficient of the age test block is calculated.
Embodiment 5
This embodiment offers a kind of Creep Characteristics detection methods of above-mentioned steel-slag mixture comprising following steps:
(1) first with lubricator the inner wall of mold is smeared, then adds steel-slag mixture made from above-described embodiment 3
It is added in mold；Specifically, lubricant can select vaseline, it is highly the circle of 150mm that it is 150mm that diameter, which can be selected, in mold
Column type mold.In addition, toward mold addition steel-slag mixture when, need in three times uniformly to pour into steel-slag mixture mold it
In, wherein after uniformly pouring into for the first time, steel-slag mixture is gently tapped with small punty, keeps steel-slag mixture uniform in mold
It places；The steel-slag mixture poured into for the second time is once fewer than preceding, similarly with small punty by steel-slag mixture after being finished down
It places uniform；Steel-slag mixture is filled uniformly in mold by third time.
(2) mold obtained above equipped with steel-slag mixture is put into press machine, to the steel-slag mixture in mold
It is pressed, after forming 30h, then is demoulded with hydraulic ejection device, the experiment block of abjection is handled with care, it is important to note that not
The edge of test block is touched, test block at this time without intensity, obtains forming blocks substantially；Wherein, the loaded value of press machine is
1300kN。
(3) after demoulding 30h, forming blocks are carried out sprinkling maintenance 7 days, daily morning and at night each pair of forming blocks carry out equal
Even watering is primary；After sprinkling maintenance, then forming blocks are impregnated and carry out soaked maintenance 30h in water, creeping property can be obtained
It can the required test block of detection.
(4) test block 14 day age unconfined compressive strength is carried out using strain controlling formula unconfined compression apparatus to test,
The failing load for obtaining 14 day age test block is that 128.5kN (pays attention to guaranteeing loading speed when carrying out unconfined compressive strength
Consistency, the accuracy of guarantee test result).
(5) according to the failing load of test block, external force is applied to test block with spring Creep Apparatus, and continue an age
Phase measures the initial deformation value and total deformation value of test block with digital display displacement measurement；Wherein, it is to the external force of test block application
0.5 times of the failing load of test block, i.e., applying external force to test block is 67.5kN.
(6) according to the initial deformation value of test block and total deformation value, the Creep Coefficient of the age test block is calculated.
Embodiment 6
This embodiment offers a kind of Creep Characteristics detection methods of above-mentioned steel-slag mixture comprising following steps:
(1) first with lubricator the inner wall of mold is smeared, then adds steel-slag mixture made from above-described embodiment 3
It is added in mold；Specifically, lubricant can select vaseline, it is highly the circle of 150mm that it is 150mm that diameter, which can be selected, in mold
Column type mold.In addition, toward mold addition steel-slag mixture when, need in three times uniformly to pour into steel-slag mixture mold it
In, wherein after uniformly pouring into for the first time, steel-slag mixture is gently tapped with small punty, keeps steel-slag mixture uniform in mold
It places；The steel-slag mixture poured into for the second time is once fewer than preceding, similarly with small punty by steel-slag mixture after being finished down
It places uniform；Steel-slag mixture is filled uniformly in mold by third time.
(2) mold obtained above equipped with steel-slag mixture is put into press machine, to the steel-slag mixture in mold
It is pressed, after molding for 24 hours, then is demoulded with hydraulic ejection device, the experiment block of abjection is handled with care, it is important to note that not
The edge of test block is touched, test block at this time without intensity, obtains forming blocks substantially；Wherein, the loaded value of press machine is
1300kN。
(3) after demoulding for 24 hours, forming blocks are carried out sprinkling maintenance 6 days, daily morning and at night each pair of forming blocks carry out equal
Even watering is primary；After sprinkling maintenance, then forming blocks are impregnated and carry out soaked maintenance in water for 24 hours, creeping property can be obtained
It can the required test block of detection.
(4) test block 28 day age unconfined compressive strength is carried out using strain controlling formula unconfined compression apparatus to test,
The failing load for obtaining 28 day age test block is that 149.6kN (pays attention to guaranteeing loading speed when carrying out unconfined compressive strength
Consistency, the accuracy of guarantee test result).
(5) according to the failing load of test block, external force is applied to test block with spring Creep Apparatus, and continue an age
Phase measures the initial deformation value and total deformation value of test block with digital display displacement measurement；Wherein, it is to the external force of test block application
0.4 times of the failing load of test block, i.e., applying external force to test block is 58kN.Wherein, 4 test blocks are put on every Creep Apparatus
By the way of stacking, upper and lower two test blocks are cushion block, and intermediate two test blocks are creep test block.Installation fixes displacement
Meter, must guarantee the verticality of four test blocks when test block stacks, test block center is overlapped with the center line of Creep Apparatus.It presses
It is equipped with according to the test block of different larval instar with condition shrinkage test block.It is loaded onto good Creep Stress and has recorded instantaneous deformation value.
Corresponding deformation values have been recorded according to test number of days.
(6) according to the initial deformation value of test block and total deformation value, the Creep Coefficient of the age test block is calculated.
The Creep Characteristics detection method provided according to above-described embodiment 4-6 is respectively to 7 days, 14 days and the test of 28 day age
Block applies different external force (Creep Stress) and carries out Creep Characteristics detection, obtains corresponding compressive deformation value and contraction distortion value,
Its testing result such as following table 1-3.(Creep Stress of table 1 is the 30% of failing load, and the Creep Stress of table 2 is failing load
40%, the Creep Stress of table 3 is the 50% of failing load)
Table 1
Table 2
Table 3
Wherein, Creep Coefficient φtCalculation formula it is as follows:
In formula, εctFor the creep strain value after t days ages, ε0For initial creep strain value, εtTo pass through t days ages
Shrinkage value afterwards, Δ LtFor the compressive deformation value after t days ages, Δ L0For initial compression deformation values, LbTo measure gauge length
(original height of test block).
From upper table 1-3, it can be seen that steel-slag mixture intensity provided in an embodiment of the present invention is high, has lesser creep
Coefficient.In addition, Creep Characteristics detection method provided in an embodiment of the present invention, easy to operate, accuracy is high, can react well
The Creep Coefficient changing rule of steel-slag mixture.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of preparation method of steel-slag mixture, which comprises the following steps:
(1) steel slag is sieved, obtains fine aggregate, middle aggregate, coarse aggregate, it is spare；The partial size of the fine aggregate is greater than 0mm,
And it is less than 5mm；The partial size of the middle aggregate is not less than 5mm, and is not more than 10mm；The partial size of the coarse aggregate is greater than 10mm, but
No more than 20mm；
(2) fine aggregate obtained above, middle aggregate and coarse aggregate are dried, it is spare；
(3) according to mass fraction meter, following components is weighed: fine aggregate 28%-43%, middle aggregate 20%-25%, coarse aggregate
The mass fraction adduction of 28%-33%, miberal powder 4%-8%, water 5%-6%, each component are 100%, spare；
(4) above-mentioned weighed each component is mixed, is placed in sealing space after carrying out stewing material processing, is stirred for
It is even, obtain steel-slag mixture.
2. a kind of preparation method of steel-slag mixture according to claim 1, which is characterized in that the density of the steel slag is
(3-3.5)×103kg/m3。
3. a kind of preparation method of steel-slag mixture according to claim 1, which is characterized in that calcium oxide in the miberal powder
Quality accounting be 40%-60%.
4. a kind of preparation method of steel-slag mixture according to claim 3, which is characterized in that titanium dioxide in the miberal powder
The quality accounting of silicon is 15%-25%.
5. a kind of preparation method of steel-slag mixture according to claim 1, which is characterized in that in the step (3),
The time of stewing material processing is 8-15h.
6. steel-slag mixture made from a kind of preparation method according to any one of claims 1 to 5.
7. a kind of steel-slag mixture as claimed in claim 6 is preparing the application in construction material.
8. a kind of Creep Characteristics detection method of steel-slag mixture as claimed in claim 6, which is characterized in that including following step
It is rapid:
S1, first with lubricator the inner wall of mold is smeared, then steel-slag mixture is added in mold；
S2, the steel-slag mixture in mold is pressed, after molding, then is demoulded, obtains forming blocks；
S3, sprinkling maintenance first is carried out to forming blocks, then forming blocks immersion is subjected to soaked maintenance in water, obtains test block；
S4, test block is subjected to unconfined compressive strength test, obtains the failing load of test block；
S5, the failing load according to test block apply external force to test block, and continue an age, and measurement obtains test block
Initial deformation value and total deformation value；
S6, initial deformation value and total deformation value according to test block, are calculated the Creep Coefficient of the age test block.
9. the Creep Characteristics detection method of steel-slag mixture according to claim 8, which is characterized in that the step S2
In, after forming 18-30h, then demoulded.
10. the Creep Characteristics detection method of steel-slag mixture according to claim 8, which is characterized in that the step
It is 0.3-0.5 times of the failing load of test block to the external force that test block applies in S5.
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