CN108083837A - A kind of chopped basalt fibre toughening silicate light-weight aggregate and preparation method thereof - Google Patents
A kind of chopped basalt fibre toughening silicate light-weight aggregate and preparation method thereof Download PDFInfo
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- CN108083837A CN108083837A CN201810056088.7A CN201810056088A CN108083837A CN 108083837 A CN108083837 A CN 108083837A CN 201810056088 A CN201810056088 A CN 201810056088A CN 108083837 A CN108083837 A CN 108083837A
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- weight aggregate
- flyash
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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
- C04B28/18—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 mixtures of the silica-lime type
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of chopped basalt fibre toughening silicate light-weight aggregates and preparation method thereof.The raw material of the light-weight aggregate are made of material dry powder and basalt fibre, and the volume of basalt fibre accounts for the 0.5% ~ 3.0% of material dry powder volume, wherein, material dry powder by mass percentage, including following component：Flyash 60.3% ~ 75.8%, quick lime 14.2% ~ 24.7%, yellow ground 10% ~ 15%, using a rolling, twice stirring, three times plus hydraulic art, flyash two benches charging technique, wet method balling-up, by natural curing, hydrothermal synthesis, you can obtain basalt fibre toughening silicate light-weight aggregate.Gained light-weight aggregate cylindrical compress strength 10MPa ~ 25MPa, 1400 grades ~ 1600 grades of apparent density, it can be used to prepare LC45 ~ LC80 structure light aggregate concretes, the present invention, which has, saves equipment, the energy, the advantage of raw material, it is not high that existing light-weight aggregate cylindrical compress strength can preferably be solved, it is difficult to the problem of preparing high grade light aggregate concrete.
Description
Technical field
The present invention relates to a kind of high strength silicate light-weight aggregate of basalt fibre toughening and preparation methods, belong to the light coagulation of structure
Soil artificial light coarse aggregate production field.
Technical background
Light aggregate concrete is widely used in bridge due to the advantages of its specific strength is high, and density is low, good economy performance, marine
Raft, skyscraper and subgrade construction area etc..Light-weight aggregate is as a main phase in light aggregate concrete, to light
The performance of aggregate concrete has very important influence.China to light aggregate concrete especially light-weight aggregate research starting compared with
Evening although achieving certain achievement, there is also some problems：1. traditional processing technology with clay, shale etc. be raw material,
It is made using high temperature sintering of the rotary kiln in 1100 DEG C~1250 DEG C, is unfavorable for protecting farmland and environment, energy consumption are larger；2. light collection
Expect that manufacturing enterprise to improve yield, often introduces a certain amount of swelling agent, cylindrical compress strength 2.0MPa in light-weight aggregate production process
~4.5MPa, low strength can not further improve the compression strength of light aggregate concrete, it is impossible to meet architectural engineering to more
The requirement of high grade light aggregate concrete；3. due to problem of perception, manufacturing enterprise is inadequate to the research and development of structure high-strength lightweight
Pay attention to, structure is still slow with high-strength lightweight development, only accounts for the 2%~3% of light-weight aggregate market, limits its life in China
Production, research and development and the developing of application market, cause current China's high-strength lightweight quality single, and production capacity seriously lags behind west prosperity
The basic position of country.
Light-weight aggregate cylindrical compress strength how is improved, reduces energy consumption, provides a kind of new approaches of production high-strength lightweight, newly
Method, and can be problem to be solved of the present invention to prepare LC45~LC80 structure light aggregate concretes.
The content of the invention
The object of the present invention is to provide one kind to have high cylindrical compress strength, the silicate light-weight aggregate and its system of relatively low energy consumption
Preparation Method, the light-weight aggregate can be used for preparing LC45~LC80 structure lightweight concretes.
Realizing the technical solution of the object of the invention is：
Be chopped basalt fibre toughening silicate light-weight aggregate, and the raw material of the light-weight aggregate are fine by material dry powder and basalt
Dimension composition, the volume of basalt fibre account for material dry powder volume 0.5%~3.0%, wherein, material dry powder is by mass percentage
Meter, including following component：Flyash 60.3%~75.8%, quick lime 14.2%~24.7%, yellow ground 10%~15%.
Further, the active calcium ion content in quick lime (A-CaO) is 60wt%~88wt%.
Further, the dioxide-containing silica in flyash is 40wt%~60wt%.
Further, maximum particle diameter≤1.25mm of yellow ground.
Further, the length of basalt fibre be 2mm~12mm, 20 μm~25 μm of diameter.
The preparation method of above-mentioned chopped basalt fibre toughening silicate light-weight aggregate, includes the following steps：
The first step：It is prepared by mixture
(1) will first account for the part flyash, whole yellow ground and whole quick limes of flyash gross mass 40%~50% by than
Example is put into forced mixer, and adds in the water for accounting for quick lime gross mass 10%~20%, stirs 4min~5min, treats various material
After mixing, discharging to slaking silos, which digest 3h~4h, must digest material；
(2) digestion is expected to add in edge runner rolling 3min~5min, treats digestion material without fine with basalt after conglomeration particle
Dimension, remaining flyash are put into togerther forced mixer, and add in 5%~15% water for accounting for digestion material quality, ensure digestion
Material is moist, stir to the mixing of each material fully, fiber is uniformly dispersed up to mixture；
Second step：Mixture balling-up
Using wet method balling-up, the mixture prepared is put into nodulizer, with 0.5~0.9 critical speed, rotates balling-up
Disk, and the water for accounting for mixture gross mass 5%~20% is slowly sprayed into nodulizer in the balling-up stage, until being formed has centainly just
The mixing pellet of beginning intensity, the size control of mixing pellet is in 5mm~20mm；
3rd step：Natural curing,
Molding mixing pellet is placed, maintenance 12h~48h is stacked in moisturizing environment, during this period quick lime and flyash
The pre-reaction of generation part generates silicate mineral and mixture ball is caused to have good initial compression strength；
4th step：Hydrothermal synthesis
Mixing pellet after natural curing is sent into still kettle, under the conditions of 1.0MPa saturated vapor pressures, 180 DEG C,
8h is kept the temperature, then cooled to room temperature, you can obtain the basalt of tobermorite and hydrated calcium silicate (CSH) gel composition
Fiber reinforced silicate light-weight aggregate.
Further, in second step, critical speed is calculated using equation below：Critical speedWherein, g attaches most importance to
Power acceleration, unit m/s2；R be pan-pelletizer radius, unit m.
Compared with prior art, the present invention it has the following advantages：1st, this method can obtain cylindrical compress strength 10MPa~25MPa's
Light-weight aggregate, cylindrical compress strength are far above high temperature sintering expanded ceramsite；2nd, due to preparing light-weight aggregate using hydrothermal synthesis, with 1100 DEG C~
1250 DEG C of high temperature sinterings are compared, and this method more green energy conservation is environmentally friendly；3rd, since light-weight aggregate is light aggregate concrete crackle
Multiplication and the origin of extension, compared with sintering grow haydite, this method can be effectively sluggish during basalt fibre incorporation is gathered materials
The multiplication of crackle and extension in light aggregate concrete improve lightweight concrete compression strength；4th, this method selects density lighter, chemistry
The basalt fibre that performance is stablized is as toughening material, and gained gathers materials, and durability is good, and intensity is high, with sintering grow haydite phase
Than being applicable in and preparing LC45~LC80 high grade structure lightweight concretes；5th, this method is using a rolling, secondary agitation, three times
Add water, flyash two benches charging technology, it is possible to reduce slaking silos quantity, save equipment investment, ensure material be sufficiently mixed, work
Make clean environment.
Description of the drawings
Fig. 1 is fiber-matrix bonding interface stress diagram.
Fig. 2 is that this method produces the process flow chart that basalt fibre steams tough silicate light-weight aggregate.
Specific embodiment
The principle of the present invention is to utilize fiber reinforcement.The adhesion strength of fiber and matrix is to influence the master of fiber reinforcement effect
Want factor, stress is transferred to fiber by fiber-matrix interface in matrix, if interface soap-free emulsion polymeization intensity, there is no fiber increasings
It is tough；If interface binding intensity is too low, fiber is pulled out, and interfacial adhesion occurs and destroys, it is impossible to give full play to fiber reinforced effect.
To probe into the influence factor of interface binding intensity, a part need to be made and simplify processing：1. assume that fiber and matrix are combined in interface
Completely；2. assume that fiber is line elastomer；3. assume that the shear stress of light-weight aggregate matrix and shearing strain are in rigid-perfectly plastic body, i.e., it is fine
Dimension-interface binding intensity is a constant, τe；
Stress is as shown in Figure 1 inside fiber reinforced light-weight aggregate：
σcRepresent staple fiber and the representational matrix that gathers materials around it, σfFor stress in fiber, (b) figure is (a) figure circle
Amplifier section.From z to dynamic balance, can obtain：
(πr2)σf+(2πrdz)τe=(π r2)(σf+dσf)；
I.e.
Z is integrated, is obtained
In staple fiber end, since strain is concentrated, fiber and matrix, just since stress is excessive, have been disengaged in curing,
Therefore σf0=0, it obtains
If the ultimate tensile strength σ of fiberfu, when fibre length is 2leWhen, the stress at fiber midpoint is exactly σfu, at this time
Corresponding fibre length 2leThat is critical length.
As fibre length l=2leWhen, only fiber midpoint reaches σfu, as fibre length l ＜ 2leWhen, fiber midpoint stress
Less than σfu, failure mode is spike protein gene；As fibre length l ＞ 2leWhen, fiber midpoint nearby has a segment length stress to reach
σfu, failure mode is fibrous fracture, and fibre length is longer, and stress can reach σfuLength it is bigger.It is possible thereby to release fibre
Tie up draw ratioBigger, mean stress more tends to σ in fiberfu, fiber reinforced effect is better.Therefore selected in the present inventionIt is larger
Basalt fibre, on the premise of workability is not influenced, as far as possible improve light-weight aggregate intensity.
The principle of the present invention is to utilize fiber distance theory.In fault in material such as micro-crack, gap etc., applying external force
When, hole, seam position generate larger stress concentration, cause the extension of crackle, ultimately result in the failure of material.Therefore, it is intended to enhance
Tensile strength, it is necessary to reduce the stress concentration degree of crack tip.It is connected in cracks using fiber, the effect of material tension stress
When, fiber can transfer loads to crackle upper and lower surface so that matrix can continue stress, and the fibre number for bridging crack is got over
More, fiber spacing is smaller, mitigates the reversal of stress field that the stress concentration degree of crack tip is also bigger, is generated to crack tip
Bigger, when fiber is clouded in crackle, stress concentration will disappear.Therefore the present invention in by basalt fibre (volume accounting≤
3.0%) mix in light-weight aggregate, can effectively sluggish crackle multiplication and extension, improve light-weight aggregate intensity, and then be conducive to improve and mix
Solidifying soil intensity.
The technical thought of the present invention：1. light-weight aggregate is the origin of light aggregate concrete crackle, for sluggish crackle multiplication with
Extension improves light aggregate concrete strength degree, basalt fibre should be filled into light-weight aggregate, while improves light-weight aggregate intensity；
2. using quick lime as calcareous raw material, excessive flyash is mutually to prepare essential mineral using hydrothermal synthesis as siliceous raw material
The light-weight aggregate of hydrated calcium silicate gel (CSH) and tobermorite；3. it uses a rolling, twice stirring, add water, fine coal three times
Grey two-stage charging technology ensures that the abundant digestion of quick lime is mixed with the uniform of material.
Embodiment one：
With reference to Fig. 2, basalt fibre volume accounting is 1.0% in this embodiment；A-CaO contents 60% in quick lime, it is raw
Lime：Flyash：Yellow ground=18.6:66.4:15；It is 10MPa~14MPa that light-weight aggregate cylindrical compress strength, which is made,；
The first step：By 90kg yellow ground, 111.6kg quick limes and 159.4kg (accounting for flyash gross mass 40%) flyash are put
Enter forced mixer, while stirring and add first time water 22.3kg (first time water accounts for Lime Quality 15%), treat that material is mixed
When closing uniformly and dampness is presented, discharging to slaking silos digests 3h, and it is for use that digestion material is made；
Second step：Digestion material made from the first step is added in into edge runner rolling 3min~5min, treats digestion material without conglomeration
Forced action type is added in after grain together with 32.2kg basalt fibres, 239.0kg flyash (account for flyash gross mass 60%) to stir
Mix machine and while second water 46.9kg of spray (second of water accounts for digestion material quality 13%), treat that material stirring is abundant and fiber disperses
Up to mixture after uniformly；
3rd step：The mixture that second step is prepared is gradually added into nodulizer, and with the rotating speed of 24r/min, (0.6 times critical
Rotating speed) it rotates pan-pelletizer and gradually sprays third time water 94.5kg (third time water accounts for mixture quality 13.9%), it treats in nodulizer
It is formed after the mixing pellet of a diameter of 5mm~20mm sizes, mixing pellet is drawn off；
4th step：Pellet natural curing 12h will be mixed made from 3rd step, so that white lime and flyash occur centainly
Pre-reaction so that pellet has certain initial compression strength, beneficial to pellet transport and hydrothermal synthesis；
5th step：It is sent into pellet is mixed made from the 4th step in still kettle, is 1MPa in saturated vapor pressure, temperature is
Hydrothermal synthesis 8h under conditions of 180 DEG C；Room temperature is cooled to get hydrothermal synthesis light-weight aggregate；
6th step：5th step hydrothermal synthesis light-weight aggregate is detected with reference to national standard GB/T 17431.2-2010, after qualification to obtain the final product
Basalt fibre toughening silicate light-weight aggregate.
Embodiment two：
With reference to Fig. 2, basalt fibre volume accounting is 3.0% in this embodiment；A-CaO contents 88% in quick lime, it is raw
Lime：Flyash：Yellow ground=14.2:75.8:10；It is 16MPa~20MPa that light-weight aggregate cylindrical compress strength, which is made,；
The first step：By 60kg yellow ground, 84.9kg quick limes and 204.8kg flyash (accounting for flyash gross mass 45%) are put into
Forced mixer while stirring and the first time of spray water 17.0kg (first time water accounts for Lime Quality 20%), treats material mixing
Uniformly and dampness is presented, discharging to slaking silos digests 4h, and it is for use that digestion material is made；
Second step：Digestion material made from the first step is added in into edge runner rolling 3min~5min, treats digestion material without conglomeration
Forced action type stirring is added in after grain together with 96.6kg basalt fibres, 249.9kg flyash (accounting for flyash gross mass 55%)
Machine simultaneously adds second of water 52.5kg (second of water accounts for digestion material quality 15%) simultaneously, treats that material stirring is abundant and fiber disperses
Up to mixture after even；
3rd step：The mixture that second step is prepared is gradually added into nodulizer, and first with the rotating speed of 24r/min, (0.6 times is faced
Boundary's rotating speed) pan-pelletizer 3min is rotated, then pan-pelletizer is rotated with the rotating speed (0.8 times of critical speed) of 32r/min, and turn in pan-pelletizer
Third time water 118.4kg (third time water accounts for mixture quality 15.8%) is gradually sprayed when dynamic, treats to form a diameter of 5mm in nodulizer
After the mixing pellet of~20mm sizes, mixing pellet is drawn off；
4th step：Pellet natural curing will be mixed made from 3rd step for 24 hours, so that white lime and flyash occur centainly
Pre-reaction so that mixture ball has certain initial compression strength, beneficial to pellet transport and hydrothermal synthesis；
5th step：It is sent into pellet is mixed made from the 4th step in still kettle, is 1MPa in saturated vapor pressure, temperature is
Hydrothermal synthesis 8h under conditions of 180 DEG C；Room temperature is cooled to get hydrothermal synthesis light-weight aggregate；
6th step：5th step hydrothermal synthesis light-weight aggregate is detected with reference to national standard GB/T 17431.2-2010, after qualification to obtain the final product
Basalt fibre toughening silicate light-weight aggregate.
Embodiment three：
With reference to Fig. 2, basalt fibre volume accounting is 2.0% in this embodiment；A-CaO contents 80% in quick lime, it is raw
Lime：Flyash：Yellow ground=15.7:71.3:13；It is 16MPa~20MPa that light-weight aggregate cylindrical compress strength, which is made,；
The first step：By 78kg yellow ground, 94.1kg quick limes and 213.9kg (accounting for flyash gross mass 50%) flyash are put into
Forced mixer while stirring and adds first time water 18.8kg (first time water accounts for Lime Quality 20%), treats material mixing
When uniformly and dampness is presented, discharging to slaking silos digests 3.5h, and it is for use that digestion material is made；
Second step：Digestion material made from the first step is added in into edge runner rolling 3min~5min, treats digestion material without conglomeration
Forced action type stirring is added in after grain together with 64.4kg basalt fibres, 213.9kg flyash (accounting for flyash gross mass 50%)
Machine simultaneously adds second of water 54.0kg (second of water accounts for digestion material quality 14%) simultaneously, treats that material stirring is abundant and fiber disperses
Up to mixture after even；
3rd step：The mixture that second step is prepared is gradually added into nodulizer, and first with the rotating speed of 24r/min, (0.6 times is faced
Boundary's rotating speed) pan-pelletizer 4min is rotated, then pan-pelletizer is rotated with the rotating speed (0.8 times of critical speed) of 32r/min, and turn in pan-pelletizer
Third time water 112.1kg (third time water accounts for mixture quality 15.6%) is gradually sprayed when dynamic, treats to form a diameter of 5mm in nodulizer
After the mixing pellet of~20mm sizes, mixing pellet is drawn off；
4th step：Pellet natural curing 36h will be mixed made from 3rd step, so that white lime and flyash occur centainly
Pre-reaction so that mixture ball has certain initial compression strength, in favor of pellet transport and hydrothermal synthesis；
5th step：It is sent into pellet is mixed made from the 4th step in still kettle, is 1MPa in saturated vapor pressure, temperature is
Hydrothermal synthesis 8h under conditions of 180 DEG C；Room temperature is cooled to get hydrothermal synthesis light-weight aggregate；
6th step：5th step hydrothermal synthesis light-weight aggregate is detected with reference to national standard GB/T 17431.2-2010, after qualification to obtain the final product
Basalt fibre toughening silicate light-weight aggregate.
Example IV：
With reference to Fig. 2, basalt fibre volume accounting is 3.0% in this embodiment；A-CaO contents 60% in quick lime, it is raw
Lime：Flyash：Yellow ground=18.6:66.4:15；It is 22MPa~25MPa that light-weight aggregate cylindrical compress strength, which is made,；
The first step：By 90kg yellow ground, 111.6kg quick limes and 159.4kg flyash (accounting for flyash gross mass 40%) are put
Enter forced mixer, while stirring and the first time of spray water 22.3kg (first time water accounts for Lime Quality 20%), treat that material is mixed
When closing uniformly and dampness is presented, discharging to slaking silos digests 4h, and it is for use that digestion material is made；
Second step：Digestion material made from the first step is added in into edge runner rolling 3min~5min, treats digestion material without conglomeration
After grain forced mixer is added in together with 96.6kg basalt fibres, 239.0kg flyash (accounting for flyash quality 60%)
And add second of water 50.5kg (second of water accounts for digestion material quality 14%) simultaneously, it treats material stirring fully and fiber is uniformly dispersed
Afterwards up to mixture；
3rd step：The mixture that second step is prepared is gradually added into nodulizer, and first with the rotating speed of 24r/min, (0.6 times is faced
Boundary's rotating speed) pan-pelletizer 4min is rotated, then pan-pelletizer 6min is rotated with the rotating speed (0.8 times of critical speed) of 32r/min, then with 36r/
The rotating speed (0.9 times of critical speed) of min rotates pan-pelletizer, and third time water 125.4kg is gradually sprayed while pan-pelletizer rotates
(third time water accounts for mixture quality 16.8%) treats to be formed after the mixing pellet of a diameter of 5mm~20mm sizes in nodulizer,
Mixing pellet is drawn off；
4th step：Pellet natural curing 48h will be mixed made from 3rd step, so that white lime and flyash occur centainly
Pre-reaction so that mixture ball has certain initial compression strength, in favor of the transport of mixing pellet and hydrothermal synthesis；
5th step：It is sent into pellet is mixed made from the 4th step in still kettle, is 1MPa in saturated vapor pressure, temperature is
Hydrothermal synthesis 8h under conditions of 180 DEG C；Room temperature is cooled to get hydrothermal synthesis light-weight aggregate；
6th step：5th step hydrothermal synthesis light-weight aggregate is detected with reference to national standard GB/T 17431.2-2010, after qualification to obtain the final product
Basalt fibre toughening silicate light-weight aggregate.
Basalt fibre toughening silicate light-weight aggregate performance in 1 each embodiment of table
Claims (10)
1. be chopped basalt fibre toughening silicate light-weight aggregate, which is characterized in that the light-weight aggregate essential mineral is mutually Tuo Beimo
Come stone, aluminium for tobermorite and hydrated calcium silicate gel.
2. light-weight aggregate as described in claim 1, which is characterized in that the raw material of the light-weight aggregate are by material dry powder and basalt
Fiber forms, and the volume of basalt fibre accounts for the 0.5% ~ 3.0% of material dry powder volume, wherein, material dry powder is by mass percentage
Meter, including following component：Flyash 60.3% ~ 75.8%, quick lime 14.2% ~ 24.7%, yellow ground 10% ~ 15%.
3. light-weight aggregate as claimed in claim 2, which is characterized in that the active calcium ion content in quick lime is 60wt% ~ 88wt%.
4. light-weight aggregate as claimed in claim 2, which is characterized in that the dioxide-containing silica in flyash is 40wt% ~ 60wt%.
5. light-weight aggregate as claimed in claim 2, which is characterized in that maximum particle diameter≤1.25mm of yellow ground.
6. light-weight aggregate as claimed in claim 2, which is characterized in that the length of basalt fibre be 2mm ~ 12mm, 20 μm of diameter ~
25μm。
7. the light-weight aggregate as described in claim 1-6 is any, which is characterized in that prepared by following steps：
The first step：It is prepared by mixture
（1）First the part flyash for accounting for flyash gross mass 40% ~ 50%, whole yellow ground and whole quick limes are put by force in proportion
Standard mixer, and the water for accounting for quick lime gross mass 10% ~ 20% is added in, stirring treats various material after mixing, discharging to digestion
Storehouse, which digests, must digest material；
（2）Digestion material is added in into edge runner rolling 3min ~ 5min, treat digestion material without after conglomeration particle with basalt fibre, surplus
Remaining flyash is put into togerther forced mixer, and adds in the water for accounting for digestion material quality 5% ~ 15%, stirs to the mixing of each material and fills
Divide, fiber is uniformly dispersed up to mixture；
Second step：Mixture balling-up
Using wet method balling-up, the mixture prepared is put into nodulizer, pan-pelletizer is rotated with 0.5 ~ 0.9 critical speed, and
5% ~ 20% water for accounting for mixture gross mass is slowly sprayed into nodulizer in the balling-up stage, mixing pellet size control is existed
5mm~20mm；
3rd step：Natural curing
Molding mixing pellet is placed, maintenance 12h ~ 48h is stacked in moisturizing environment；
4th step：Hydrothermal synthesis
Mixing pellet after natural curing is sent into still kettle, under the conditions of 1.0MPa saturated vapor pressures, 180 ± 10 DEG C,
7 ~ 9h is kept the temperature, then cooled to room temperature, you can obtain the light-weight aggregate.
8. the preparation method of the light-weight aggregate as described in claim 1-6 is any, which is characterized in that include the following steps：
The first step：It is prepared by mixture
（1）First the part flyash for accounting for flyash gross mass 40% ~ 50%, whole yellow ground and whole quick limes are put by force in proportion
Standard mixer, and the water for accounting for quick lime gross mass 10% ~ 20% is added in, stirring treats various material after mixing, discharging to digestion
Storehouse, which digests, must digest material；
（2）Digestion material is added in into edge runner rolling 3min ~ 5min, treat digestion material without after conglomeration particle with basalt fibre, surplus
Remaining flyash is put into togerther forced mixer, and adds in the water for accounting for digestion material quality 5% ~ 15%, stirs to the mixing of each material and fills
Divide, fiber is uniformly dispersed up to mixture；
Second step：Mixture balling-up
Using wet method balling-up, the mixture prepared is put into nodulizer, with 0.5 ~ 0.9 times of critical speed, rotates pan-pelletizer,
And 5% ~ 20% water for accounting for mixture gross mass is slowly sprayed into nodulizer in the balling-up stage, mixing pellet size control is existed
5mm~20mm；
3rd step：Natural curing,
Molding mixing pellet is placed, maintenance 12h ~ 48h is stacked in moisturizing environment；
4th step：Hydrothermal synthesis
Mixing pellet after natural curing is sent into still kettle, under the conditions of 1.0MPa saturated vapor pressures, 180 ± 10 DEG C,
7 ~ 9h is kept the temperature, then cooled to room temperature, you can obtain the light-weight aggregate.
9. preparation method as claimed in claim 8, which is characterized in that in the first step, stir 4min ~ 5min, treat that various material mix
After closing uniformly, discharging to slaking silos digestion 3h ~ 4h must digest material；Digestion is expected to add in edge runner rolling 3min ~ 5min.
10. chopped basalt fibre toughening silicate light-weight aggregate prepared by preparation method as claimed in claim 8 is preparing mark
Number to apply in LC45 ~ LC80 structure lightweight concretes.
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| CN108083837B (en) | 2020-11-13 |
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