CN107098633B - The method for preparing cement bonding agent using discarded concrete - Google Patents
The method for preparing cement bonding agent using discarded concrete Download PDFInfo
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- CN107098633B CN107098633B CN201710096727.8A CN201710096727A CN107098633B CN 107098633 B CN107098633 B CN 107098633B CN 201710096727 A CN201710096727 A CN 201710096727A CN 107098633 B CN107098633 B CN 107098633B
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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
- 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
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
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Abstract
It the present invention relates to the use of the method that discarded concrete prepares cement bonding agent, more particularly to wet-treating is carried out the method for preparing cement bonding agent using discarded concrete, in more detail, it is related to after being crushed to discarded concrete, cement bonding agent is prepared by the wet process process washed and be heat-treated, thus the cement bonding agent for preparing the method for the outstanding cement bonding agent of hydration reaction and therefrom preparing.
Description
Technical field
It the present invention relates to the use of the method that discarded concrete carries out wet-treating to prepare cement bonding agent, in more detail,
It is related to after being crushed to discarded concrete, cement bonding agent is prepared by the wet process process washed and be heat-treated,
Cement bonding agent to prepare the method for the outstanding cement bonding agent of hydration reaction and therefrom prepare.
Background technique
With the works aging built in the past, the yield for building waste continues to increase, and discards to become and increase
The reason of object total yield.In particular, the daily yield of discarded concrete is 49352 (ton/days), annual yield is about 1800
Ten thousand tons, amount increased dramatically every year, but current situation is to can not find recovery scheme appropriate, cause merely with for roadbed material
Material, or final landfill more increased in landfill yard hence for the important ratio of the recycling of discarded concrete in the past.
Also, 60%~65% built in waste is discarded concrete, thus in order to improve returning for construction waste
Yield, the rate of recovery for improving discarded concrete accounts for important specific gravity, also, discarded concrete also compares as the value of valuable resource
Other wastes are high, thus become the exploitation theme of many developers for a long time.
Currently, known in Korean granted patent the 10-0582770th as the recovery technology of waste concrete micro powder
The waste concrete micro powder that having is 1.0~1.5 using density and the size of particle is 5 μm~200 μm is used to prepare environmentally friendly revetment
The method of high functional concrete, but this uses the wet process process that produces with slurry form of waste concrete micro powder, causes density low,
To need to add the additional reinforcement material of circulation aggregate, rubble, flyash, silicon powder etc., this non-Economy aspect is come
Say there is a problem of what commercialization was limited.
Also, there is known the cement bonding agent relative to 10 parts by weight in Korean granted patent the 10-0857101st,
Comprising 10 parts by weight~50.8 parts by weight waste concrete micro powder, (granularity is 0.074mm hereinafter, density is 1~1.2, water suction
Rate be 5 weight percent~6 weight percent) and 14.3 parts by weight~23.7 parts by weight water upper and lower water course inject filling
Material, but 2.2 or more of this density also below the averag density as silica sand, so that there are bending strengths and compressive strength to drop
Low problem.
But in technology as described above, a part of foreign matter only removed in discarded concrete is used as mixing material,
The utilization of hydrability is not accounted for, thus in the presence of the shortcomings that needing the material of hydration reaction can not be utilized as.
Existing technical literature
Patent document
Patent document 1: South Korea KR10-0857101B1
Summary of the invention
The present invention is proposed to solve above-mentioned problem of the prior art, it is intended that providing to discarded mixed
After solidifying soil is crushed, it is viscous that the cement that hydration reaction is improved is prepared using the wet process process washed and be heat-treated
The method for tying agent.
Another object of the present invention is to provide the cement bonding agents prepared from above-mentioned preparation method.
In order to solve the problem above-mentioned, the present invention provides the following side that cement bonding agent is prepared using wet-treating
Method comprising: step 1) crushes discarded concrete to prepare waste concrete micro powder；Step 2), to above-mentioned discarded mixed
Solidifying soil micro mist is washed；Step 3) is heat-treated washed above-mentioned waste concrete micro powder；And step 4),
After carrying out above-mentioned heat treatment, husky and cement bonding agent is separated from waste concrete micro powder, in 400 DEG C~1000 DEG C of temperature strip
Under part, carry out above-mentioned steps 3 using spin-drier) in heat treatment.
In a preferably embodiment of the invention, in above-mentioned steps 1) in, using selected from by crusher, pulverizer and mill
The device of one or more of the group of broken machine composition is crushed.
In a preferably embodiment of the invention, in above-mentioned steps 1) in, it can be so that the fines content of discarded concrete reaches
To 3000cm2The mode of/g or more is crushed.
In a preferably embodiment of the invention, in above-mentioned steps 1) in, it can be so that the fines content of discarded concrete reaches
To 3000cm2/ g~5000cm2The mode of/g is crushed.
In a preferably embodiment of the invention, above-mentioned steps 1) the average particle size of waste concrete micro powder can be 10
μm~2000 μm.
In a preferably embodiment of the invention, above-mentioned steps 2 can be carried out using watering sieve under normal temperature conditions) in
Washing.
In a preferably embodiment of the invention, above-mentioned watering can be with 2kg/cm2~4kg/cm2Pressure condition carry out
High pressure watering.
In a preferably embodiment of the invention, above-mentioned preparation method may also include the steps of: in carrying out step 2)
Washing before, add one or more of defoaming agent and flocculating agent to waste concrete micro powder and mixed.
In a preferably embodiment of the invention, may also include the steps of: carry out above-mentioned steps 2) in washing it
Before, add flocculating agent and defoaming agent to waste concrete micro powder to be mixed, above-mentioned flocculating agent and defoaming agent can with 1:1~
The weight ratio of 1:6 is added.
In a preferably embodiment of the invention, above-mentioned spin-drier may include rotary body, crushing device, heat generation
Device, speed adjusting device and temperature-adjusting device.
In a preferably embodiment of the invention, above-mentioned heat treatment can be carried out under the conditions of 600 DEG C~800 DEG C of temperature.
In a preferably embodiment of the invention, until above-mentioned heat treatment goes to moisture content less than 3%.
In a preferably embodiment of the invention, above-mentioned heat treatment goes to moisture content as until 0.5%~3%.
In a preferably embodiment of the invention, above-mentioned separation can be carried out using dust arrester.
Also, the present invention provides through above-mentioned preparation methods come the cement bonding agent for preparing.
In a preferably embodiment of the invention, above-mentioned cement bonding agent may include silica (S iO2), calcium oxide
(CaO) and magnesia (MgO).
In a preferably embodiment of the invention, above-mentioned cement bonding agent may include 10 weight percent~50 weight percents
The calcium oxide and magnesia of ratio.
In a preferably embodiment of the invention, the density of above-mentioned cement bonding agent can be 2.2g/cm3~2.5g/cm3。
In a preferably embodiment of the invention, above-mentioned cement bonding agent can for concrete mixture, pitch filler,
Roadbed curing agent, landfill injectant, anti-moving employs curing agent, acid soil improving agent and various dirts at cement bonding agent additive
The intermediate treatment curing agent of mud.
In the preparation process in accordance with the present invention, discarded concrete can be utilized as to raw material to prepare environmentally friendly compatibility and economy
Outstanding, few foreign and the easy cement bonding agent of hydration reaction.
Also, cement bonding agent of the invention can be easy to be applicable in as Artificial Soil because moisture content is low and hydration reaction is outstanding
The curing agent of earth curing agent, slurry curing agent etc..
Specific embodiment
Hereinafter, the present invention will be described in more detail in order to help to understand the present invention.
The term used in this specification and the claimed range of invention or vocabulary should not limit as usual or dictionary
On meaning and explained, inventor is in order to illustrate the invention of its own in optimal method and Ying Congke suitably defines term
The principle of concept set out and be interpreted only as meeting the meaning and concept of technical idea of the invention.
The present invention provide discarded concrete is utilized as raw material prepare outstanding environmentally friendly compatibility and economy, few foreign and
The method of the easy cement bonding agent of hydration reaction.
With rebuild, the activation etc. of redevelopment work and dismantle facility, resulting discarded concrete is mainly filled out
It buries and is handled.But discarded concrete is increasing every year, and causes to be difficult to ensure landfill yard, thus in environmental protection and
In the recycling viewpoint of resource, increasingly paid close attention to using the scheme of discarded concrete.In this regard, proposing and utilizing to discarded coagulation
Soil is crushed to be utilized as the technology of the material of cement bonding agent or concrete.But in technology as described above, only lead to
Dry process is crossed to crush to discarded concrete, and is burnt into only to remove a part of foreign matter, to be used as mixing material
Material, does not account for the utilization of hydrability, causes presence that can not be utilized as the shortcomings that needing the material of hydration reaction.
In this regard, the present invention, which is provided, is utilized as raw material for discarded concrete, and it is anti-to prepare aquation to carry out wet-treating
The method for the cement bonding agent that answering property is improved.
The above-mentioned method that cement bonding agent is prepared using wet-treating of one embodiment of the invention can include: step 1),
Discarded concrete is crushed to prepare waste concrete micro powder；Step 2) washs above-mentioned waste concrete micro powder；
Step 3) is heat-treated washed above-mentioned waste concrete micro powder；And step 4), carry out above-mentioned heat treatment it
Afterwards, husky and cement bonding agent is separated from waste concrete micro powder.
Also, under the conditions of 400 DEG C~1000 DEG C of temperature, spin-drier can be used to carry out above-mentioned heat treatment.
In the discarded concrete of one embodiment of the invention containing comprising including foreign matter husky ingredient and cement bonding agent at
Point, wherein foreign matter, which can be, recycles remaining substance other than husky ingredient and cement bonding agent ingredient, for example, waste plastics, useless
It is recycled together when the discarded concretes such as timber, waste polystyrene foam plastic.
Term " cement bonding agent (cement) " as used in the present invention can refer to when being stirred with water or solution
It is hardened and can play the role of the inorganic metallic substance of stalemate agent or adhesive.
Above-mentioned steps 1) be for being crushed the step of preparing micro mist while removing foreign matter to discarded concrete, can
Discarded concrete is crushed from crushed material and removes foreign matter, and recycles dust to prepare waste concrete micro powder.
At this point, can using the device selected from one or more of group for being made of crusher, pulverizer and grater come into
The above-mentioned crushing of row.
Above-mentioned crusher refers to the machine for solids such as fractured rock or wastes, as long as required micro mist can be prepared
Device, so that it may use with being not particularly limited, but for example, can for rotary shear shredder, rotary impact crusher, pressure
Contracting crusher, percussive crusher or sieve formula crusher.
Above-mentioned pulverizer refers to the machine for subdivided solids, as long as the device of required micro mist can be prepared, so that it may
It uses with being not particularly limited, but for example, can be boulder crusher (coarse crushing), tumbling mill (in broken) or jet pulverizer.
Above-mentioned grater refers to the machine of the solids such as finely pulverized rock or ore, as long as required micro mist can be prepared
Device, so that it may use with being not particularly limited, but for example, can be large-scale rod mill, ball mill, circular cone type tumbling mill, three
Bevel-type grinding machine or Ismet Atli tower pulverizer.
On the other hand, it in the above-mentioned crushing of one embodiment of the invention, can be applied in combination according to required micro mist as above
Crusher, pulverizer and the grater.For example, first break and then secondary use can carried out using crusher
Pulverizer or grater obtain finer micro mist to carry out second of crushing to it.
Specifically, device as described above can be used so that the fines content of discarded concrete reaches 3000cm2/ g or more
Mode carry out above-mentioned crushing.It preferably, can be so that the fines content of discarded concrete reaches 3000cm2/ g~5000cm2/ g's
Mode carries out above-mentioned crushing.
Wherein, above-mentioned fines content (fineness) is the scale for indicating the fine degree of powder, and fines content is higher, can more mention
High hydration reaction.On the other hand, using fines content testing machine S1-510 (Blaine Air-Permeabillity
Apparatus) above-mentioned fines content is determined.
Also, the average particle size of above-mentioned waste concrete micro powder can be 10 μm~2000 μm.Preferably, above-mentioned discarded mixed
The average particle size of solidifying soil micro mist can be 10 μm~1000 μm.
Above-mentioned steps 2) be for being washed above-mentioned waste concrete micro powder to remove remaining foreign matter the step of, can
Above-mentioned washing is carried out using watering sieve.
Above-mentioned washing can be repeated 2 times or more using watering sieve under normal temperature conditions.At this point, above-mentioned room temperature can
Indicate 15 DEG C~35 DEG C of temperature.Specifically, above-mentioned watering can be in 2k g/cm2~4kg/cm2Pressure condition under carry out high pressure
Watering.If carrying out high pressure watering with above-mentioned pressure condition, can be easier to carry out washing, so as to effectively remove foreign matter.
At this point, being sieved as above-mentioned watering, as long as can be easy to carry out the device of required washing, so that it may not limited especially
System ground uses, but for example, can be watering vibrating screen.
Specifically, above-mentioned watering sieve may include for transfer the conveyer sieved, the sieve for placing waste concrete micro powder,
For the cleaning water discharge apparatus to above-mentioned waste concrete micro powder jet cleaning water.At this point, being watering vibration in above-mentioned watering sieve
In the case where dynamic sieve, above-mentioned sieve can be vibrating screen.Above-mentioned waste concrete micro powder can be placed in sieve, come on one side by conveyer
It is transferred, is washed on one side by the watering sprayed in cleaning water discharge apparatus.Also, the vibrating screen the case where
Under, it can be moved on one side by the up-down vibration of vibrating screen, on one side become easier to by drop washing.
Also, the preparation method of one embodiment of the invention may also include the steps of: before carrying out above-mentioned washing, to useless
Concrete micro mist addition one or more of defoaming agent and flocculating agent is abandoned to be mixed.
At this point, above-mentioned defoaming agent and flocculating agent play bubble in the cement bonding agent for inhibiting finally to be prepared, and improve
The effect of the cohesiveness of particle can import above-mentioned flocculating agent to reduce the porosity of cement bonding agent.
It may include the above-mentioned flocculating agent of 5 parts by weight~10 parts by weight relative to the waste concrete micro powder of 100 parts by weight,
It preferably, may include 7 parts by weight~10 parts by weight.Above-mentioned flocculating agent is not particularly limited, and can use the neck according to purpose
Generally well-known flocculating agent in domain.
It may include that 10 parts by weight~the above-mentioned of 30 parts by weight disappears also, relative to the waste concrete micro powder of 100 parts by weight
Infusion, it is preferable that may include 10 parts by weight~20 parts by weight.In the waste concrete micro powder relative to 100 parts by weight, comprising small
In the case where the above-mentioned defoaming agent of 10 parts by weight, inside particles bubble removal effect is possible to very little, it is possible to
Increase porosity, in the waste concrete micro powder relative to 100 parts by weight, the feelings of the above-mentioned defoaming agent comprising being greater than 30 parts by weight
Under condition, bubble removal effect is very little, and be possible to generation makes price is opposite to rise because using defoaming agent, leads to economy
The problem of reduction.Above-mentioned defoaming agent is not particularly limited, and can use generally well-known defoaming agent in the field according to purpose.
Preferably, in the above preparation method, before being washed, flocculating agent is added to waste concrete micro powder and is disappeared
Infusion is mixed, at this point, above-mentioned flocculating agent and defoaming agent can be added with the weight ratio of 1:1~1:6.
Above-mentioned steps 3) washed above-mentioned waste concrete micro powder is carried out in order to remove remaining fine foreign matter
The step of heat treatment, as described above, can be carried out under the conditions of 400 DEG C~1000 DEG C of temperature using spin-drier
State heat treatment.Preferably, it can be carried out using spin-drier at above-mentioned heat under the conditions of 600 DEG C~800 DEG C of temperature
Reason.Also, until above-mentioned heat treatment goes to the moisture content of the cement bonding agent being finally prepared less than 3%, it is preferable that on
State heat treatment go to the cement bonding agent being finally prepared moisture content become 0.5%~3% until.
Specifically, the above-mentioned of one embodiment of the invention is carried out with the temperature of above range by using batch drier
Heat treatment, can be burnt into, to more remove remaining fine foreign matter while being dried to reduce moisture content.
Above-mentioned spin-drier may include rotary body, crushing device, heat generator, speed adjusting device and temperature tune
The device of one or more of regulating device.
Wherein, above-mentioned rotary body can be packed into the material (washed waste concrete micro powder) that will be dried and carry out together
Rotation, rotary body can have multiple micropores.
It is agglomerated while particle rotates in heat treatment in order to prevent, above-mentioned crushing device can more be crushed the grain of cohesion
Son.
Above-mentioned heat generator can be the device for generating heat to rotary body according to required temperature.
Above-mentioned speed adjusting device can be used for adjusting the rotation speed of rotary body, above-mentioned temperature-adjusting device can for it is upper
Heat generator is stated to be connected come the device being adjusted in a manner of generating heat according to temperature.
Also, above-mentioned steps 4) it is that husky and cement bonding agent ingredient is separated from waste concrete micro powder to prepare cement bonding
The step of agent, can carry out above-mentioned separation using dust arrester.
Wherein, the waste concrete micro powder of one embodiment of the invention may include husky and cement bonding agent ingredient, can be by upper
It states separation to separate husky and cement bonding agent, so as to obtain husky and cement bonding agent respectively.That is, one embodiment of the invention
Preparation method can obtain result object from a preparation method by separating husky and cement bonding agent respectively, in this regard, can basis
Purpose is utilized as being prepared the method for cement bonding agent using discarded concrete or is prepared husky method using discarded concrete.
Above-mentioned dust arrester can be connected with spin-drier, thus separated together with spin-drier, alternatively,
After being heat-treated using spin-drier, additionally separated using dust arrester.
Specifically, above-mentioned separation can be carried out using dust arrester and according to husky and cement bonding agent particle size difference.
Wherein, above-mentioned dust arrester refers to that separation in the decentralized system for having the particulate of solid or liquid is floated in gas captures its particle
Device, can using above-mentioned dust arrester come from waste concrete micro powder separation be used as the cement bonding agent of particulate, so as to divide
From husky and cement bonding agent.
The average particle size of above-mentioned sand can be 0.2mm~2mm, the average particle size of above-mentioned cement bonding agent can for 10 μm~
150μm.Preferably, the average particle size of above-mentioned sand can be 0.5mm~1.5mm, and the average particle size of above-mentioned cement bonding agent can be with
It is 10 μm~100 μm.
Above-mentioned dust arrester can be gravitational collector, inertial separator, centrifugal force dust arrester, filter dust collector, cleaning collection
Dirt device or electrostatic (electric dust) precipitator, however, it is not limited to this.
In the preparation method of one embodiment of the invention, discarded concrete can be utilized as to raw material to prepare environmentally friendly compatibility
And economy is outstanding, few foreign and the easy cement bonding agent of hydration reaction.
Also, the present invention provides the cement bonding agent prepared from above-mentioned preparation method.
The above-mentioned cement bonding agent of one embodiment of the invention may include silica, calcium oxide and magnesia, it is preferable that can
Include 10 weight percent~50 weight percent calcium oxide and magnesia.
Also, the moisture content of above-mentioned cement bonding agent is smaller than 3%.Preferably, the moisture content of above-mentioned cement bonding agent can
Think 0.5%~3%.
Also, the density of above-mentioned cement bonding agent can be 2.0g/cm3~2.5g/cm3.Preferably, above-mentioned cement bonding
The density of agent can be 2.1g/cm3~2.4g/cm3。
Meanwhile the above-mentioned cement bonding agent of one embodiment of the invention can be concrete mixture, pitch filler, roadbed
Curing agent, cement bonding agent additive, landfill injectant, anti-moving curing agent, acid soil improving agent and the various sludge employed
Intermediate treatment curing agent, it is preferable that can be used as the curing agent such as artificial soil curing agent, sewage slurry curing agent.
Hereinafter, the present invention is described in more detail by embodiment and experimental example.But following embodiment and experimental example are used
In illustrating the present invention, the scope of the present invention is not limited to these embodiments and experimental example.
Embodiment 1
Using pulverizer come so that fines content becomes 3500cm2The mode of/g crushes discarded concrete, to make
Standby waste concrete micro powder utilizes watering sieve (watering pressure: 2kg/cm on one side2) keep the above-mentioned waste concrete micro powder mobile,
Watering later, is heat-treated at a temperature of 600 DEG C to be washed using spin-drier on one side, to carry out
Firing.Later, husky and cement bonding agent is separated from the waste concrete micro powder being burnt into using dust arrester, to achieve water
Mud binder.
Embodiment 2
In addition to the pressure that makes to sprinkle water is as 4kg/cm2Except being washed, taken by method identical with above-described embodiment 1
Obtained cement bonding agent.
Embodiment 3
Other than being mixed, lead in addition to putting into flocculating agent and defoaming agent in the forward direction waste concrete micro powder wash
It crosses method identical with above-described embodiment 1 and achieves cement bonding agent.At this point, having used the flocculating agent of the weight ratio of 1:1 and having disappeared
Infusion.
Embodiment 4
Other than being mixed, lead in addition to putting into flocculating agent and defoaming agent in the forward direction waste concrete micro powder wash
It crosses method identical with above-described embodiment 1 and achieves cement bonding agent.At this point, having used the flocculating agent of the weight ratio of 1:6 and having disappeared
Infusion.
Comparative example 1
Using pulverizer come so that fines content becomes 3500cm2The mode of/g crushes discarded concrete, to make
Standby waste concrete micro powder, and be heat-treated at a temperature of 600 DEG C using spin-drier, to be burnt into.
Later, husky and cement bonding agent is separated from the waste concrete micro powder being burnt into using dust arrester, so that it is viscous to achieve cement
Tie agent.
Comparative example 2
In addition to the pressure that makes to sprinkle water is as 1.5kg/cm2Except being washed, pass through method identical with above-described embodiment 1
Achieve cement bonding agent.
Comparative example 3
In addition to the pressure that makes to sprinkle water is as 5kg/cm2Except being washed, taken by method identical with above-described embodiment 1
Obtained cement bonding agent.
Comparative example 4
Other than being mixed, lead in addition to putting into flocculating agent and defoaming agent in the forward direction waste concrete micro powder wash
It crosses method identical with above-described embodiment 1 and achieves cement bonding agent.At this point, used the weight ratio of 1:0.5 flocculating agent and
Defoaming agent.
Comparative example 5
Other than being mixed, lead in addition to putting into flocculating agent and defoaming agent in the forward direction waste concrete micro powder wash
It crosses method identical with above-described embodiment 1 and achieves cement bonding agent.At this point, having used the flocculating agent of the weight ratio of 1:7 and having disappeared
Infusion.
Experimental example 1
It is determined according to KS L 5110 and is obtained into comparative example 3 in above-described embodiment 1 to embodiment 3 and comparative example 1
Density, porosity and the foreign matter content of each cement bonding agent.At this point, density is determined according to 2314 method of KF F, according to
2576 method of KS F determines porosity using BET method to determine foreign matter content.It shows the result in following table 1.
Table 1
As shown in Table 1 above, the porosity of the cement bonding agent of the embodiment 1 to embodiment 4 of one embodiment of the invention is
30%~50%, density 2.0g/cm3~2.5g/cm3, foreign matter content indicates that 1.0 weight percent or less are horizontal.
On the contrary, confirmation is as follows: never include in the preparation method of washing step the cement bonding agent of comparative example 1 for preparing with
And the cement of the comparative example 2 prepared from the preparation method including watering pressure limit shown in washing step but the disengaging present invention
Binder not only indicates the numerical value of the density range appropriate departing from cement bonding agent shown in the present invention, but also foreign matter content
It is more to about 30 times or more maximum.On the other hand, in the case where the cement bonding agent of comparative example 3, density, porosity and foreign matter contain
Amount indicates cement bonding agent physical property range shown in the present invention, but since watering pressure is too high, when being washed, not only removes
Foreign matter, but also a large amount of active principle is removed, to significantly reduce the yield for the cement bonding agent being finally prepared.
Also, illustrate following numerical value, that is, be detached from the range of ratio ranges shown in the present invention using flocculating agent and
The numerical value or density and porosity that defoaming agent reduces come the density of the comparative example 4 prepared and the cement bonding agent of comparative example 5 are obvious
It is detached from the numerical value of the physical property of cement bonding agent shown in the present invention.This indicate to obtain needed for cement bonding agent physical property,
The ratio of flocculating agent and defoaming agent is possible to important.
Experimental example 2
In order to confirm the suitable of the sludge solidifying agent as the cement bonding agent prepared in above-described embodiment 1 into embodiment 4
With possibility, preparation includes the sludge solidifying agent of above-mentioned cement bonding agent, and confirmed that its sewage sludge moisture content reduces effect
Fruit.As comparison other, it is thus identified that sludge solidifying agent (comparative example 6) not comprising cement bonding agent and include above-mentioned comparative example 5
Cement bonding agent sludge solidifying agent sewage sludge moisture content reduce effect.
Relative to the cement of 100 parts by weight, the cement bonding agent of 400 parts by weight, the burning material of cocoanut shell are equably mixed
Material, bituminous coal combustion material are prepared for sludge solidifying agent.At this point, having used the burning material of the above-mentioned cocoanut shell of the weight ratio of 4:1
Material and bituminous coal combustion material.
100 parts by weight moisture content be 85% sewage sludge in mix 30 parts by weight above-mentioned sludge solidifying agent it
Afterwards, health is carried out under normal temperature conditions until moisture content becomes 60%, to be prepared for each solidfied material.
Determine each solidfied material (embodiment 1 to embodiment 4 and comparative example 5 and comparative example 6) of preparation with when
Between process water-cut variation, water-cut variation is determined according to 2306 method of KS F.It shows the result in following table 2.
Table 2
As shown in Table 1 above, confirm as follows: with time going by, utilizing the embodiment 1 comprising one embodiment of the invention
To embodiment 4 cement bonding agent sludge solidifying agent come the moisture content of the solidfied material of the embodiment 1-1 to embodiment 4-1 prepared
It efficiently reduces.
On the contrary, using the sludge solidifying agent of cement bonding agent is not included come the water content of the solidfied material of the comparative example 6 prepared
Reduction effect is very little, and the comparative example 5-1's prepared using the sludge solidifying agent of the cement bonding agent comprising comparative example 5 is consolidated
Compared with the solidfied material of comparative example 6, moisture content reduces effect and more reduces compound.It is expressed as follows: because the cement of comparative example 5 bonds
Agent internal porosity is too low and substantially reduces the porosity of the sludge solidifying agent comprising it, to reduce rate of water absorption.
Claims (12)
1. a kind of method for preparing cement bonding agent using wet-treating, which is characterized in that
Include:
Step 1) crushes discarded concrete to prepare waste concrete micro powder；
Step 2) adds one or more of defoaming agent and flocculating agent in waste concrete micro powder to be mixed；
Step 3), using watering sieve come with 2kg/cm2~4kg/cm2Pressure condition above-mentioned waste concrete micro powder is carried out it is high
Pressure watering, to be washed；
Step 4) is heat-treated washed above-mentioned waste concrete micro powder；And
Step 5) separates husky and cement bonding agent from waste concrete micro powder after carrying out above-mentioned heat treatment,
Under the conditions of 400 DEG C~1000 DEG C of temperature, carry out above-mentioned steps 4 using spin-drier) in heat treatment, on
Flocculating agent and defoaming agent is stated to add with the weight ratio of 1:1~1:6.
2. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that above-mentioned
In step 1), crushed using the device selected from one or more of the group being made of crusher, pulverizer and grater.
3. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that above-mentioned
In step 1), so that the fines content of discarded concrete reaches 3000cm2The mode of/g or more is crushed.
4. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that above-mentioned step
The average particle size of rapid waste concrete micro powder 1) is 10 μm~2000 μm.
5. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that above-mentioned rotation
Rotatable drying machine includes rotary body, crushing device, heat generator, speed adjusting device and temperature-adjusting device.
6. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that 600
DEG C~800 DEG C of temperature under the conditions of carry out above-mentioned heat treatment.
7. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that above-mentioned heat
Until processing goes to moisture content less than 3%.
8. the method according to claim 1 for preparing cement bonding agent using wet-treating, which is characterized in that utilize collection
Dirt device carries out above-mentioned separation.
9. a kind of cement bonding agent, which is characterized in that using selected from utilization wet process described in any one of claim 1 to 8
Processing is prepared to prepare the preparation method of cement bonding agent.
10. cement bonding agent according to claim 9, which is characterized in that
Above-mentioned cement bonding agent includes silica, calcium oxide and magnesia,
Above-mentioned cement bonding agent includes 10 weight percent~50 weight percent calcium oxide and magnesia.
11. cement bonding agent according to claim 9, which is characterized in that the density of above-mentioned cement bonding agent is 2.0g/cm3
~2.5g/cm3, the porosity of above-mentioned cement bonding agent is 30%~50%.
12. cement bonding agent according to claim 9, which is characterized in that above-mentioned cement bonding agent be concrete mixture,
Pitch filler, cement bonding agent additive, landfill injectant, anti-moving employs curing agent, acid soil improvement at roadbed curing agent
The intermediate treatment curing agent of agent and various sludge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2016-0020850 | 2016-02-22 | ||
| KR1020160020850A KR101735094B1 (en) | 2016-02-22 | 2016-02-22 | Method of preparing ciment binder from concret waste |
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| CN107098633A CN107098633A (en) | 2017-08-29 |
| CN107098633B true CN107098633B (en) | 2019-09-13 |
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| CN (1) | CN107098633B (en) |
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| CN113354310A (en) * | 2021-06-02 | 2021-09-07 | 东南大学 | Single-component geopolymer curing agent based on multi-component solid wastes and preparation method thereof |
| EP4155278A1 (en) * | 2021-09-22 | 2023-03-29 | HeidelbergCement AG | Improving reactivity of carbonated recycled concrete fines |
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| CN1990129A (en) * | 2005-12-28 | 2007-07-04 | 罗以杰 | A method for comprehensive treatment of construction refuse |
| KR100789937B1 (en) | 2007-09-07 | 2008-01-02 | 주식회사 상천 | Rotation type dryer |
| KR100869188B1 (en) * | 2007-10-12 | 2008-11-18 | 한상철 | Method of making fine particles using recycling concrete |
| CN102432207A (en) * | 2011-08-30 | 2012-05-02 | 云南华威废弃物资源化有限公司 | Construction regenerated binding material prepared from construction garbage and preparation method thereof |
| CN102992669B (en) * | 2012-11-28 | 2015-12-09 | 浙江大学宁波理工学院 | Waste concrete micro powder activation method |
| CN103241966B (en) * | 2013-05-10 | 2015-03-11 | 浙江大学宁波理工学院 | Clinker free regenerated slag micro-powder compound cement |
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