CN108892405A - A kind of concrete is used or the preprocess method of cement mortar expanded slag - Google Patents
A kind of concrete is used or the preprocess method of cement mortar expanded slag Download PDFInfo
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- CN108892405A CN108892405A CN201810964027.0A CN201810964027A CN108892405A CN 108892405 A CN108892405 A CN 108892405A CN 201810964027 A CN201810964027 A CN 201810964027A CN 108892405 A CN108892405 A CN 108892405A
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- expanded slag
- slag
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- cement mortar
- expanded
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
Abstract
The invention discloses a kind of concrete use or the preprocess methods of cement mortar expanded slag, by squeeze compacting break process to expanded slag and/or stirring squeezes, shearing, friction break process obtain capable of being directly used as expanded slag after the pretreatment of concrete or cement mortar aggregate, expanded slag be to handle the slag particle that blast-furnace slag obtains using swollen pearl method production technology.The present invention is by pre-processing expanded slag, it efficiently reduces and even has been eliminated grain defect present in expanded slag, large-sized expanded slag particle or the particle shape being sticked together flocculent structure particle can be squeezed to compacting to be broken for meeting the expanded slag particle of concrete use or cement mortar aggregate size, pretreated expanded slag can be made integrally to show the powder formed after expanded slag Particle Breakage to increase, the particle shape form of expanded slag particle becomes mellow and full effect, it can greatly improve as mechanical properties such as the intensity of the aggregate concrete added or cement mortar.
Description
Technical field
The invention belongs to the technical fields of construction material, more particularly, are related to that a kind of concrete is used or cement mortar is used
The preprocess method of expanded slag.
Background technique
Expanded slag particle is the solid waste generated in industrial processes, refers specifically to blast-furnace slag using swollen pearl method
Slag particle caused by production technology, expanded slag grain shape are approximate circle or oval sphere, and granular size is not
Deng (partial size is generally 10 millimeters or less), main component is silicates substance, and particle surface is bright and clean, hard shell is in vitreum
Based on enamel shape, inner structural features be fine and closely woven honeycomb closed pore structure, there is water proof to protect airway dysfunction, particle packing is close
Degree is about 900Kg/m3；Expanded slag particle does not contain active silica, activated alumina, carbonate isoreactivity mineralogical composition,
With cement alkali will not occur for expanded slag particle in use.
When blast-furnace slag is using swollen pearl method production technology production expanded slag, due to the limitation and production by production technology
The influence of fluctuations of process, the expanded slag particle ultimately generated, which removes, contains a large amount of approximate circle or oval surface light
Clean, the hard enamel shape based on vitreum of shell, the sphere that inner structural features are fine and closely woven honeycomb closed pore structure
Grain is outer, can also generate and much have defective particle shape, if these expanded slags are directly as concrete or cement mortar
Aggregate is carried out using not only the technical performance index of concrete or cement mortar being caused to be deteriorated, but also because cementitious material and mixing
New waste can also be caused in economic aspect by closing sharply increasing for dosage of material.If but not adding to the expanded slag of these grain shapes
If utilizing, expanded slag will be not only reduced as the comprehensive utilization ratio of the solid waste generated in industrial processes,
The new wasting of resources and environmental nuisance will also be caused.
Summary of the invention
In order to solve the problems in the existing technology, the object of the present invention is to provide a kind of concrete use or cement mortar
With the preprocess method of expanded slag, using pretreated technological measure method to the defect particles in the presence of expanded slag into
The aggregate that row optimizes and expanded slag after resulting pretreatment is enable to be directly used as concrete or cement mortar.
The present invention provides a kind of concrete use or the preprocess methods of cement mortar expanded slag, by expansion mine
Slag squeeze compacting break process and/or stirring squeezes, shearing, friction break process obtain capable of being directly used as concrete or
Expanded slag after the pretreatment of cement mortar aggregate, wherein the expanded slag is to handle blast furnace using swollen pearl method production technology
The slag particle that clinker obtains.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, works as extruding
When compacting break process and stirring are squeezed, sheared, friction break process is both needed to carry out, the extruding compacting break process is described
Stirring is squeezed, is sheared, carrying out before or after friction break process.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, it is described to squeeze
Roll shafts pair that pressure compacting break process is reversely rotated at least with the roll shaft or roller of several rotary motions or several pairs or
Roller is broken to force squeezing compacting to expanded slag, wherein controls roll shaft or roller or the reversed rotation of rotary motion
The extruding compacting crushing gap size of each roll shaft or roller turned meets the size skill of concrete use or cement mortar aggregate
Art requirement.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, it is described to stir
It mixes extruding, shearing, friction break process and action of forced stirring is carried out to the expanded slag being contained in container at least with agitating device
It squeezes, shearing, rubbing is crushed.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, it is described to stir
Extruding, shearing, friction break process are mixed in such a way that agitating device rotation and container are fixed or agitating device rotates and holds
The mode of device rotation.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, it is described to stir
It mixes device and is and include stirring blade or can play the helical feed for expanded slag material being squeezed, being sheared and being overturn passage
The device of mixing plant.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, it is described pre-
Do not include the expanded slag particle of large-sized particle shape flocculent structure particle shape in expanded slag after processing, be in opening, porous
And the expanded slag particle of the porous open flocculent structure particle shape of intensity weakness, in gill shape rather than it is approximate circle or ellipse
The expanded slag particle of circular spherical particles form.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, it is described pre-
The grain composition of expanded slag constitutes continuous and large or fine granule and uniformly arranges in pairs or groups after processing, when the roll shaft or roller of setting rotary motion
Or reversely rotate each roll shaft or roller extruding compacting crushing gap having a size of 4~10mm when, by national standard《Commonly
Sand for Concrete, stone quality and test method standard》JGJ52 and《Building sand》GB/T14684 carries out the gradation of test simultaneously
The expanded slag particle for being 4.75mm~0.150mm by corresponding screen size range is for statistical analysis, pretreated expansion
Slag gradation substantially conforms to II gradation area of area of sand.
One embodiment of the preprocess method of concrete use or cement mortar expanded slag according to the present invention, pretreatment
The gradation result of expanded slag afterwards is as follows：
The present invention is efficiently reduced and even has been eliminated present in expanded slag by pre-processing to expanded slag
On the one hand large-sized expanded slag particle or the particle shape being sticked together flocculent structure particle can be squeezed compacting by grain defect
It is broken for meeting the expanded slag particle of concrete use or cement mortar aggregate size, on the other hand can make pretreated
The particle shape form that expanded slag integrally shows the powder increase, expanded slag particle that are formed after expanded slag Particle Breakage becomes
Mellow and full effect can not only be directly used as concrete or cement mortar aggregate, and can greatly improve and add as aggregate
Concrete or cement mortar the mechanical properties such as intensity, realize better economy valence while generating more dominance energy
Value.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
The slag particle obtained using swollen pearl method production technology processing blast-furnace slag is directly used as by the present inventor
When concrete or cement mortar aggregate, although preferably beneficial effect can be generated, still find concrete obtained or
Cement mortar is there are certain performance deficiency, and thus inventor is further studied, and discovery produces work using swollen pearl method
In the obtained slag particle of skill processing blast-furnace slag in addition to a large amount of satisfactory approximate circle or oval any surface finish, other than
The hard enamel shape in based on vitreum of shell and inner structural features are outside the spherical particles of fine and closely woven honeycomb closed pore structure,
There is also following defect particles forms：
1) blast-furnace slag after being quickly cooled down solidification is sticked together, and forms the large scale particle shape that full-size is more than 5cm
Flocculent structure particle shape；
2) grain shape is in opening, porous and weak intensity porous open flocculent structure particle shape；
3) grain shape is in the form of gill shape, rather than approximate circle or oval spherical particles form.
If the expanded slag of these above-mentioned particle shapes carries out using meeting directly as concrete or the aggregate of cement mortar
There is following defect：
1. the expanded slag of these particle shapes will cause the constructing operation working performance of concrete or cement mortar to be deteriorated,
The workability of concrete or cement mortar is bad；
2. the particle shape flocculent structure particle shape being sticked together, there is the structural instability of particle shape, granulateds
The problem of the structural strength weakness of state；And large-sized particle shape flocculent structure particle shape is also unsatisfactory for expanded slag particle
As concrete or the aggregate of cement mortar carry out using technical performance index requirement；
3. the presence of the expanded slag particle of intensity weakness will cause the strength reduction of concrete or cement mortar；
4. the presence of the flocculent structures particle shape such as gill shape, opening, porous, then will cause in concrete or cement mortar
Cementitious material and admixture dosage sharply increase.
If the expanded slag of these grain shapes directly as concrete or the aggregate of cement mortar carry out using, not only will
Concrete or the technical performance index of cement mortar is caused to be deteriorated, and because cementitious material and sharply increasing for admixture dosage are gone back
New waste can be caused in economic aspect and increases cost.
In order to efficiently use expanded slag, while guaranteeing the relatively dominance energy of concrete or cement mortar, the present invention
Defect present in expanded slag is repaired and optimized using pretreated technological measure method.
Below to concrete of the present invention with or the preprocess method of cement mortar expanded slag be described in detail.
An exemplary embodiment of the present invention, the concrete is used or the preprocess method of cement mortar expanded slag
By carrying out squeezing compacting break process to expanded slag and/or stirring squeezes, shearing, obtain can be direct for friction break process
Expanded slag after pretreatment as concrete or cement mortar aggregate, wherein expanded slag is to use swollen pearl method production technology
The slag particle that processing blast-furnace slag obtains.
The present invention mainly passes through extruding compacting break process for the expansion of large-sized particle shape flocculent structure particle shape
Slag particle squeezes compacting and is broken for meeting the expanded slag particle of concrete use or cement mortar aggregate size, and passes through
The effects of stirring is squeezed, is sheared, friction break process is realized to expanded slag particle because of the extruding of stirring, shearing, broken friction
And the process effect of bring expanded slag particle " break firmly soft, break by force weak " and simultaneously particle shape of the realization to gill shape
Expanded slag particle sharp acute angles shape peeled off, the treatment effect of broken shaping.It is in fact possible in pretreatment
It is preceding that analysis is sampled to expanded slag, the setting and adjustment of pretreating process are carried out according to Dominant particle defect therein.
According to one embodiment of present invention, compacting break process and stirring extruding, shearing, friction can will be squeezed to be crushed
It handles and uses respectively, can also will squeeze compacting break process and stirring extruding, shearing, friction break process are used together.When
When extruding compacting break process and stirring are squeezed, sheared, friction break process is both needed to carry out, squeezes compacting break process and stirring
It squeezes, shear, being carried out before or after friction break process, preferably in stirring extruding, shearing, the advance for the break process that rubs
Row.
Extruding compacting break process and stirring are squeezed below, sheared, friction break process is illustrated respectively.
It is possible, firstly, to which the 1st class defect will be present --- " blast-furnace slag after being quickly cooled down solidification is sticked together, and is formed
Full-size can be more than the particle shape flocculent structure particle shape of 5cm " expanded slag particle first carry out squeeze compacting break process,
Both the expanded slag particle of large-sized particle shape flocculent structure particle shape compacting is squeezed to be broken for meeting concrete use or water
The expanded slag particle of cement mortar aggregate size.
Preferred embodiment in accordance with the present invention, the compacting break process that squeezes is at least with the roller of several rotary motions
Axis or roller or several pairs of roll shafts pair reversely rotated or roller carry out forcing to squeeze to suppress being crushed to expanded slag,
In, control the extruding compacting crushing gap size of the roll shaft of rotary motion or each roll shaft or roller of roller or reverse rotation
Meet the size technologies requirement of concrete use or cement mortar aggregate.
Specifically, using the roll shaft of rotary motion or roller or do reverse rotation motion roll shaft pair or roller to swollen
Swollen slag carries out forcing to squeeze suppressing broken, the extruding compacting crushing gap size of roll shaft or roller or roll shaft pair or roller pair
Setting then according to the particle shape flocculent structure particle being sticked together can be carried out squeezing compacting it is broken and squeeze compacting it is broken after
Expanded slag particle size meet concrete with or the technical requirements of cement mortar aggregate size be configured and control.
When the size of expanded slag particle is less than the roll shaft of rotary motion or the roll shaft pair of roller or reverse rotation motion
Or the extruding of roller pair, when suppressing crushing gap size, it is broken that expanded slag particle can pass through extruding compacting in the clear
Gap；When the size of expanded slag particle is greater than the roll shaft of rotary motion or the roll shaft pair or roller of roller or reverse rotation motion
When crushing gap size is suppressed in the extruding of wheel pair, the rotary motion of roll shaft or roller will force that expanded slag particle is driven to squeeze
Pressure compacting is broken, so that the particle shape flocculent structure particle being sticked together or large-sized expanded slag particle are carried out extruding pressure
System is broken, and expanded slag particle will be extruded compacting and be broken for being less than the roll shaft of rotary motion or roller or reverse rotation motion
Roll shaft pair or roller pair extruding compacting crushing gap size small size expanded slag particle, only broken size is small
Crushing gap size is suppressed in the extruding of the roll shaft or roller of rotary motion or the roll shaft pair of reverse rotation motion or roller pair
Expanded slag particle could by squeeze suppress crushing gap, reach large-sized expanded slag particle or stick in this
Particle shape flocculent structure particle together squeezes compacting and is broken for meeting the expansion mine of concrete use or cement mortar aggregate size
The purpose of solid impurity particle.
Secondly, for there are the 2nd class defects --- " grain shape is in opening, porous and weak intensity porous open
Flocculent structure particle shape " and the 3rd class defect --- " grain shape is approximate circle or oval in the form of gill shape
The expanded slag of spherical particles form " is then squeezed using stirring, shearing, broken handled of rubbing.
Specifically, the expanded slag after squeezing and suppressing break process can be imposed stirring squeeze, shearing, friction it is broken
Processing, further to improve, correct, repair the 2nd class defect and the 3rd class defect of expanded slag particle, its essence is to expansion
Slag material imposes stirring movement, and expanded slag material is made to generate extruding in whipping process between expanded slag particle, cut
It cuts, rub the effects of broken, different, Strength Changes and grain shape morphological differences, right using the hardness of expanded slag particle
" grain shape is in opening, porous and weak intensity porous open flocculent structure particle shape " and " grain shape is in faller gill
The expanded slag particle of the form of shape rather than approximate circle or oval spherical particles form " squeezed, sheared, it is broken to rub
The effects of broken, both realized to expanded slag particle because the extruding of stirring, shearing, rub broken the effects of due to bring expanded slag
The process effect of particle " break firmly soft, break by force weak ", while realizing the point to the expanded slag particle of flat-elongated particles form
Acute angle is peeled off, is crushed the effect of shaping, and the expanded slag after agitated extruding, shearing, friction break process is integrally in
The particle shape form for revealing the powder increase, expanded slag particle that are formed after Soft Swelling slag particle is crushed becomes mellow and full effect
Fruit.
Preferred embodiment in accordance with the present invention, which squeezes, shears, friction break process is at least with agitating device pair
Expanded slag progress action of forced stirring extruding, shearing, the friction being contained in container are broken, and the stirring squeezes, shearing, rubs
Break process is preferably in such a way that agitating device rotates and container is fixed or agitating device rotates and the side of container rotation
Formula.
Wherein, agitating device can be to include stirring blade or squeezed expanded slag material, cut similar to that can play
The device, such as concrete forced stirrer of helical feed mixing plant etc. of passage are cut and overturn, so as to make to expand mine
Generated between solid impurity particle squeeze, shearing, friction broken the effects of, achieve the purpose that handle expanded slag particle and effect
Fruit.
It does not include that large-sized particle shape is cotton-shaped in expanded slag after the pretreatment obtained using preprocess method of the invention
The expanded slag particle of structure particles form, in opening, porous and weak intensity porous open flocculent structure particle shape
Expanded slag particle, in gill shape rather than approximate circle or oval spherical particles form expanded slag particle.Wherein,
When crushing gap size is suppressed in the extruding of each roll shaft or roller of the roll shaft or roller or reverse rotation of setting rotary motion
When for 4~10mm, material gradation substantially conforms to II gradation area of area of sand.
The national standard about concrete and mortar sand shares two in the prior art, respectively《Normal concrete
With sand, stone quality and test method standard》JGJ52 and《Building sand》GB/T14684.Gradation area of two standards for sand
Division is the same, and is divided into three gradation areas, and the screening result according to sand is counted and divided, and is specifically shown in the following table 1.
1 sand grain composition area of table
Gradation area of IIth area of the present invention then corresponds to IIth area 1 Zhong of table, specifically, in pretreated expanded slag
(about 10~20%) larger less than the powder increasing degree of 0.150mm grain diameter.When the roll shaft or roller of setting rotary motion
Or reversely rotate each roll shaft or roller extruding compacting crushing gap having a size of 4~10mm when, by national standard《Commonly
Sand for Concrete, stone quality and test method standard》JGJ52 and《Building sand》GB/T14684 carries out the gradation of test simultaneously
The expanded slag particle for being 4.75mm~0.150mm by corresponding screen size range is for statistical analysis, then pretreated swollen
Swollen slag gradation is as follows：
It should be understood that above embodiment and following embodiment that the present invention is described in detail are merely to illustrate the present invention rather than limit
The scope of the present invention processed, some nonessential improvement and tune that those skilled in the art's above content according to the present invention is made
It is whole to all belong to the scope of protection of the present invention.
Concrete of the present invention is used combined with specific embodiments below or the preprocess method of cement mortar expanded slag is made
It further illustrates.
Embodiment 1：Screening comparative test is carried out to the expanded slag of pretreatment front and back
The size data of not pretreated expanded slag is as follows：
In the screening comparative test before and after the pretreatment of this expanded slag, pretreatment process method that expanded slag is taken
For：It is broken to pressure extruding compacting is carried out using the roll shaft for doing reverse rotation motion to expanded slag first, it is suppressed wherein squeezing
Crushing gap is dimensioned to 5mm, secondly carries out 5~10 minutes companies to expanded slag using horizontal concrete forced stirrer
Continuous quickly stirring.
The size data of expanded slag after pretreatment is as follows：
The sieve test data result of expanded slag before and after above-mentioned pretreatment analysis shows：Expansion mine after pretreatment
Slag shows coarse granule reduction, powder fine grained increases and the grain composition of expanded slag is become to connect by original discontinuous form gradation
It is continuous (to press national standard《Regular concrete sand, stone quality and test method standard》JGJ52 and《Building sand》GB/T14684
It is for statistical analysis in the expanded slag particle of 4.75mm~0.150mm range to screen size, meet II area's gradation of sand
Area).
Embodiment 2：Expanded slag cement mortar is configured to by single aggregate to the expanded slag of pretreatment front and back to carry out by force
Spend comparative test
In order to sufficiently and directly compare the Strength Changes situation of pretreatment front and back expanded slag, the expansion mine of front and back is pre-processed
Slag gradation is matched (size for being mixed with 20wt% ratio is less than the particle powder of 0.150mm) using same stages, specific as follows：
Expanded slag cement mortar is prepared as the aggregate of cement mortar using the expanded slag of single aggregate, uses 42.5
The dosage that the ordinary portland cement of strength grade presses 18wt% and 22wt% respectively carries out strength comparison test (in order to avoid right
Test result may interfere with, and the match ratio of strength comparison test is formed only with expanded slag, cement and water, not add any
Additive, admixture, mix in expanded slag particle powder of the size less than 0.150mm of 20wt% ratio purpose be in order to
Making expanded slag cement mortar in the case where being not spiked with admixture also has necessary workability).
The expanded slag cement mortar mix ratio and 28 days compressive strength test knots that not pretreated expanded slag is prepared
Fruit is as follows：
The expanded slag cement mortar mix ratio and 28 days compressive strength test results that pretreated expanded slag is prepared
It is as follows：
Expanded slag strength of cement mortar comparative test result before and after above-mentioned pretreatment shows：It is pretreated to use list
The 28 days compression strength of expanded slag cement mortar that one aggregate expanded slag is prepared, when cement consumption is 18wt%, intensity increases
Long 55.6%；When cement consumption is 22wt%, gain in strength 89.1%.
Embodiment 3：It is mixed that premixing is carried out to sand of the expanded slag before and after pretreatment by equal proportion admixture gradation
It closes, is configured to the double aggregate cement mortars of the mixing being made of two kinds of materials of expanded slag+sand and carries out strength comparison test
In order to sufficiently and directly compare the Strength Changes situation of pretreatment front and back expanded slag, pretreatment front and back expanded slag
Gradation equally use same stages with (be mixed with 20wt% ratio size be less than 0.150mm particle powder), it is specific as follows：
To the expanded slag of pretreatment front and back, by 1:1 volume ratio adds the same sand of gradation and carries out premixing mixing
It is even, the double aggregates of the mixing being made of two kinds of materials of expanded slag+sand are configured to, the common silicic acid of 42.5 strength grades is used
The dosage that salt cement presses 18wt% and 22wt% respectively carry out strength comparison test (in order to avoid to test result can be competent
It disturbs, the match ratio of strength comparison test is only with 1:The double aggregates of expanded slag+sand mixing of 1 volume ratio, cement and water group
At not adding any additive, admixture, the size that 20wt% ratio is mixed in expanded slag is less than the granular powder of 0.150mm
The purpose of material is to make expanded slag+sand mix the expansion mine that double aggregates are configured in the case where being not spiked with admixture
The double aggregate cement mortars of slag+sand also have necessary workability).
The double aggregate water of expanded slag+sand that the double aggregates of the mixing of not pretreated expanded slag+sand are configured to
Cement mortar cooperates when 28 days compressive strength test results as follows：
The double aggregate cements of expanded slag+sand that the double aggregates of the mixing of pretreated expanded slag+sand are configured to
When 28 days compressive strength test results of mortar mix are as follows：
Expanded slag+sand before and after above-mentioned pretreatment mixes the double bones of expanded slag+sand that double aggregates are configured to
Expect cement mortar strength comparison test the result shows that：It is pretreated to press 1:Expanded slag+sand of 1 volume ratio premix is mixed
Expanded slag+sand 28 days compression strength of double aggregate cement mortars that double aggregates are configured to is closed, when cement consumption is 18wt%
When, gain in strength 46%；When cement consumption is 22wt%, gain in strength 61.9%.
Embodiment 4：The sand in normal concrete is replaced with the expanded slag of pretreatment front and back, it is mixed to be configured to expanded slag
Solidifying soil carries out strength comparison test
In order to sufficiently and directly compare the Strength Changes situation of pretreatment front and back expanded slag, the expansion mine of front and back is pre-processed
Slag gradation is matched (size for being mixed with 20wt% ratio is less than the particle powder of 0.150mm) using same stages, specific as follows：
It replaces the sand in normal concrete to prepare expanded slag concrete using expanded slag, uses 32.5 strength grades
Ordinary portland cement carry out strength comparison test (in order to avoid may interfere with to test result, strength comparison test's
Match ratio is formed only with expanded slag, rubble, cement and water, is not added any additive, admixture, is mixed in expanded slag
The purpose of particle powder of the size of 20wt% ratio less than 0.150mm is to make to expand in the case where being not spiked with admixture
Slag concrete also has necessary workability).
The expanded slag concrete that not pretreated expanded slag is prepared cooperates when 28 days compressive strength test results
It is as follows：
The expanded slag concrete that pretreated expanded slag is prepared cooperates when 28 days compressive strength test results such as
Under：
Expanded slag concrete strength comparison test that expanded slag before and after above-mentioned pretreatment is configured to the result shows that：In advance
Treated, and 28 days compression strength of expanded slag concrete that expanded slag is configured to improves 50%.
In addition, in order to sufficiently and directly compare the Strength Changes situation of pretreatment front and back expanded slag, in embodiment 2, in fact
Apply example 3, in embodiment 4, the gradation of pretreatment front and back expanded slag is all made of same stages and matches, and does not account for institute in embodiment 1 still
The grain composition of the expanded slag material of presentation becomes continuous treatment effect by original discontinuous form gradation after pretreatment；
If applying in specifically cases of engineering, the expanded slag intensity of this continuous grading obtained can further substantially
Degree improves performance and realizes better economy value.
To sum up, above-described embodiment sufficiently demonstrates the beneficial effect of the present invention with processing method, realizes and " breaks firmly soft, strong
Break weak " process effect, defect present in former expanded slag obtained great reparation and improvement, can significantly mention
High pretreated expanded slag or expanded slag+sand mix the cement mortar and expansion mine that double aggregates are configured to
28 days compression strength values of dreg concrete.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (9)
1. a kind of concrete is used or the preprocess method of cement mortar expanded slag, which is characterized in that by expanded slag
It carries out squeezing compacting break process and/or stirring is squeezed, sheared, friction break process obtains that concrete or water can be directly used as
Expanded slag after the pretreatment of cement mortar aggregate, wherein the expanded slag is to handle State of Blast Furnace using swollen pearl method production technology
The slag particle that slag obtains.
2. concrete according to claim 1 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
When squeezing compacting break process and stirring extruding, shearing, friction break process are both needed to carry out, break process is suppressed in the extruding
It is carried out before or after stirring extruding, shearing, friction break process.
3. concrete according to claim 1 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
The compacting break process that squeezes is at least with the roll shaft or roller of several rotary motions or several pairs of rollers reversely rotated
Axis pair or roller are broken to force squeezing compacting to expanded slag, wherein control rotary motion roll shaft or roller or
The extruding compacting crushing gap size of each roll shaft or roller reversely rotated meets concrete and uses or cement mortar aggregate
Size technologies requirement.
4. concrete according to claim 1 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
The stirring is squeezed, is sheared, friction break process is strong to the expanded slag progress being contained in container at least with agitating device
System stirring is squeezed, is sheared, friction is broken.
5. concrete according to claim 4 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
The stirring extruding, shearing, friction break process are in such a way that agitating device rotates and container is fixed or agitating device revolves
Turn and container rotation mode.
6. concrete according to claim 4 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
The agitating device be include stirring blade or can play to expanded slag material squeezed, sheared and overturn passage spiral shell
The device of rotation conveying mixing plant.
7. concrete according to claim 1 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
It does not include the expanded slag particle of large-sized particle shape flocculent structure particle shape in expanded slag after the pretreatment, in opening
Mouthful, it is porous and weak intensity porous open flocculent structure particle shape expanded slag particle, non-approximated in gill shape
The expanded slag particle of the spherical particles form of round or ellipse.
8. concrete according to claim 1 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
The grain composition of expanded slag constitutes continuous and large or fine granule and uniformly arranges in pairs or groups after the pretreatment, when the roll shaft of setting rotary motion
Or each roll shaft or roller of roller or reverse rotation extruding compacting crushing gap having a size of 4~10mm when, by country mark
It is quasi-《Regular concrete sand, stone quality and test method standard》JGJ52 and《Building sand》GB/T14684 carries out grading, screening
It tests and corresponding screen size range is for statistical analysis for the expanded slag particle of 4.75mm~0.150mm, after pretreatment
Expanded slag gradation substantially conform to II gradation area of area of sand.
9. concrete according to claim 8 is used or the preprocess method of cement mortar expanded slag, which is characterized in that
Pretreated expanded slag gradation is as follows：
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