CN105731965B - A kind of production method of concrete lightweight aggregate - Google Patents
A kind of production method of concrete lightweight aggregate Download PDFInfo
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- CN105731965B CN105731965B CN201610065103.5A CN201610065103A CN105731965B CN 105731965 B CN105731965 B CN 105731965B CN 201610065103 A CN201610065103 A CN 201610065103A CN 105731965 B CN105731965 B CN 105731965B
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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
- C04B28/14—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 calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
Abstract
The present invention relates to a kind of production method of concrete lightweight aggregate, the aggregate semi-finished product of concrete lightweight aggregate are prepared first, are made up of following raw materials in parts by weight ratio：18~20 parts of binder materials；55~60 parts of fine aggregate；3~5 parts of conditioning agent；18~25 parts of reinforcing agent；0.25~0.3 part of coagulant；0.05~0.1 part of foaming agent；0.05~0.1 part of foam stabilizer；0.15~0.2 part of additive；Ratio of water to material 0.45~0.55；It is again 1 part of hydrophober with weight ratio, 15~20 parts of diluent, the raw material of 15~20 parts of aggregate semi-finished granules material prepares concrete lightweight aggregate finished product.The lightweight aggregate product that the present invention is produced is nontoxic, and cylindrical compress strength is high, and water absorption rate is low, and freeze thawing mass loss is small, disclosure satisfy that demand of the north cold area to concrete light aggregate；Improve the working environment and labor intensity of industrial worker；Cost of material consumption can be reduced simultaneously, the utilization rate of trade waste is improved, saves energy resource consumption so that enterprise and social benefit maximize.
Description
Technical field
The present invention relates to a kind of construction material, more particularly to a kind of production method of concrete lightweight aggregate.
Background technology
The species of lightweight aggregate concrete lightweight aggregate mainly has natural weight aggregate such as float stone, scoria at present；Industrial waste
Such as lytag, expanded slag pearl；Artificial lightweight aggregate such as haydites of book structure, leca, expanded perlite etc..According to GB/
T17431 term and definition, light-weight aggregate refer to that bulk density is not more than 1200kg/m3Thick, fine aggregate general name.Lightweight aggregate
It is divided into by generation type：Artificial lightweight aggregate -- light coarse aggregate (haydite etc.) and light fine aggregate (placer etc.)；Natural light-weight aggregate-
- float stone, scoria etc.；Industrial residue light-weight aggregate -- cinder, self-igniting coal gangue etc..
The intensity of lightweight aggregate is determined with barrel-shaped mast, and strength grade is divided into 11 grades by cube resistance to compression normal intensity.
The water absorption rate of light coarse aggregate：200~1200kg/m of bulk density of artificial lightweight aggregate and industrial residue light-weight aggregate3, 1h water absorption rates
10~30%；600~900kg/m of lytag bulk density3, 1h water absorption rates are no more than 20%.
The performance indications of most critical are water absorption rates in the northern China especially cold district such as northeast, northwest, construction material
It is required that low, intensity requirement is high, and life requirement is good, and freezing-thawing cycles should be greater than F50.But remove natural weight aggregate -- float stone
Outside, other lightweight aggregate 1h water absorption rate is more than 10%.Because its water absorption rate is high, freeze thawing mass loss is big, causes its freeze thawing
Cycle-index is far smaller than F50, can not meet the production of north cold area or the demand using lightweight aggregate concrete component.Mesh
Before, natural weight aggregate prohibites exploitation, therefore the big portion of northern China by the administrative department such as State Council's national environmental protection and tourism
What region-by-region, building product and construction enterprises can not solve lightweight aggregate carrys out source problem.If using existing artificial lightweight aggregate with
Industrial residue light-weight aggregate, and secondary pollution can be caused to production environment while production cost is high, be the industrial worker by
One of an important factor for actual bodily harm, industrial worker is because environmental pollution illness rate remains high, wherein especially with lung cancer and liver cancer
It is in the majority.
The content of the invention
The invention provides a kind of production method of concrete lightweight aggregate, the product is nontoxic, and cylindrical compress strength is high, inhales
Water rate is low, and freeze thawing mass loss is small, disclosure satisfy that demand of the north cold area to concrete light aggregate；Improve industrial worker's
Working environment and labor intensity；Cost of material consumption can be reduced simultaneously, improves the utilization rate of trade waste, saved the energy and disappeared
Consumption so that enterprise and social benefit maximize.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of production method of concrete lightweight aggregate, comprises the following steps：
1) the aggregate semi-finished product of concrete lightweight aggregate are prepared；
A) aggregate semi-finished product are made up of following raw materials in parts by weight ratio：18~20 parts of binder materials；Fine aggregate 55~60
Part；3~5 parts of conditioning agent；18~25 parts of reinforcing agent；0.25~0.3 part of coagulant；0.05~0.1 part of foaming agent；Foam stabilizer 0.05
~0.1 part；0.15~0.2 part of additive；Ratio of water to material 0.45~0.55；Wherein：Binder materials is Portland cement, thin bone
Expect that for iron tailings powder, conditioning agent be gypsum, reinforcing agent is quick lime；
B) raw material in addition to foaming agent and water is exported by material conveyor respectively, electronic scale automatic gauge adds material
Mixer, after being mixed evenly, 1.5~2min is stirred by ratio of water to material plus water；Foaming agent is poured into foaming machine, by foaming
Agent：Water=1：5~7 ratio adds water to stir into foaming suspension；
C) 0.5~1min adds foaming suspension and remixes 40~50s of stirring before material cast, injection molding machine and in
50~60 DEG C are incubated on machine, preliminary maintenance more than 2h；
D) enter steam pressure groove after the aggregate semi-finished product demoulding after preliminary maintenance, be sent to autoclave and carry out steam press maintenance, steam pressure is supported
Operating pressure during shield is controlled in 1.80~1.85MPa, and temperature control is at 205~215 DEG C；
E) after steam press maintenance terminates, dry kiln is sent into natural curing 28~30 days, drying time >=24h to aggregate half into
Product are dried；Then according to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is examined
Survey：850~900kg/m of entity density3, 8.5~11.0MPa of compression strength is qualified；
F) qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein 10~15mm grades
Volume content accounts for 60~65%, 400~425kg/m of bulk density3, 3.2~4.2MPa of cylindrical compress strength, manufactured aggregate semi-finished product
Particulate material input semi-finished product storehouse is standby；
2) concrete lightweight aggregate finished product is prepared；
G) following raw material ratio by weight is stocked up, 1 part of hydrophober, 15~20 parts of diluent, aggregate semi-finished granules
15~20 parts of material；
H) hydrophober is measured by weight with diluent, be well mixed after injecting immersion trough；After immersion liquid is made, by aggregate half
Finished particle material carries out immersion liquid, 2~3s of immersion liquid time by bucket conveyor；Particles of aggregates material after immersion liquid is promoted to drying tower
Platform, dry 24h hours with up to dry after be lightweight aggregate finished product；
I) lightweight aggregate finished product is sent into finished bin or dispatched from the factory after product inspection is qualified.
The binder materials is P.O42.5MPa Portland cements；Fine aggregate is 0.10~0.5mm of particle diameter iron tail
Miberal powder, clay content ＜ 3%；Conditioning agent be 0.05~0.07mm of particle diameter gypsum, CaSO4·2H2O content >=90%；Reinforcing agent
For 0.05~0.07mm of particle diameter quick lime, CaO content >=80%；Coagulant is the compound early strength agent of polycarboxylic acids, solid content >=
30%；Foaming agent is degreasing aluminium powder, 0.013~0.018mm of particle diameter, Al content >=99.5%；Foam stabilizer is oxirane, fat
One kind in alcohol ether, Oxidized paraffin wax；Additive is one kind in barium stearate, zinc stearate, calcium stearate.
The hydrophober is one kind in aliphatic acid potassium, methyl silicon sodium alcoholate, ethyl sodium silanolate；Diluent is pure water.
Compared with prior art, the beneficial effects of the invention are as follows：
1) trade waste production concrete light aggregate, 850~900kg/m of its entity density are utilized3, compression strength 8.5
~11.0MPa；24h water absorption rate≤0.5%, freeze thawing mass loss is small, disclosure satisfy that north cold area production and makes light bone
Expect the demand of concrete；
2) product is nontoxic, while has fire prevention, heat-insulated, insulation, freeze proof, sound insulation, energy-conserving and environment-protective, good endurance it is excellent
Point；
3) production process environmental protection, the working environment and labor intensity of industrial worker are improved；Cost of material can be reduced simultaneously
Consumption, the utilization rate of trade waste is improved, save energy resource consumption so that enterprise and social benefit maximize.
Embodiment
A kind of production method of concrete lightweight aggregate of the present invention, comprises the following steps：
1) the aggregate semi-finished product of concrete lightweight aggregate are prepared；
A) aggregate semi-finished product are made up of following raw materials in parts by weight ratio：18~20 parts of binder materials；Fine aggregate 55~60
Part；3~5 parts of conditioning agent；18~25 parts of reinforcing agent；0.25~0.3 part of coagulant；0.05~0.1 part of foaming agent；Foam stabilizer 0.05
~0.1 part；0.15~0.2 part of additive；Ratio of water to material 0.45~0.55；Wherein：Binder materials is Portland cement, thin bone
Expect that for iron tailings powder, conditioning agent be gypsum, reinforcing agent is quick lime；
B) raw material in addition to foaming agent and water is exported by material conveyor respectively, electronic scale automatic gauge adds material
Mixer, after being mixed evenly, 1.5~2min is stirred by ratio of water to material plus water；Foaming agent is poured into foaming machine, by foaming
Agent：Water=1：5~7 ratio adds water to stir into foaming suspension；
C) 0.5~1min adds foaming suspension and remixes 40~50s of stirring before material cast, injection molding machine and in
50~60 DEG C are incubated on machine, preliminary maintenance more than 2h；
D) enter steam pressure groove after the aggregate semi-finished product demoulding after preliminary maintenance, be sent to autoclave and carry out steam press maintenance, steam pressure is supported
Operating pressure during shield is controlled in 1.80~1.85MPa, and temperature control is at 205~215 DEG C；
E) after steam press maintenance terminates, dry kiln is sent into natural curing 28~30 days, drying time >=24h to aggregate half into
Product are dried；Then according to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is examined
Survey：850~900kg/m of entity density3, 8.5~11.0MPa of compression strength is qualified；
F) qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein 10~15mm grades
Volume content accounts for 60~65%, 400~425kg/m of bulk density3, 3.2~4.2MPa of cylindrical compress strength, manufactured aggregate semi-finished product
Particulate material input semi-finished product storehouse is standby；
2) concrete lightweight aggregate finished product is prepared；
G) following raw material ratio by weight is stocked up, 1 part of hydrophober, 15~20 parts of diluent, aggregate semi-finished granules
15~20 parts of material；
H) hydrophober is measured by weight with diluent, be well mixed after injecting immersion trough；After immersion liquid is made, by aggregate half
Finished particle material carries out immersion liquid, 2~3s of immersion liquid time by bucket conveyor；Particles of aggregates material after immersion liquid is promoted to drying tower
Platform, dry 24h hours with up to dry after be lightweight aggregate finished product；
I) lightweight aggregate finished product is sent into finished bin or dispatched from the factory after product inspection is qualified.
The binder materials is P.O42.5MPa Portland cements；Fine aggregate is 0.10~0.5mm of particle diameter iron tail
Miberal powder, clay content ＜ 3%；Conditioning agent be 0.05~0.07mm of particle diameter gypsum, CaSO4·2H2O content >=90%；Reinforcing agent
For 0.05~0.07mm of particle diameter quick lime, CaO content >=80%；Coagulant is the compound early strength agent of polycarboxylic acids, solid content >=
30%；Foaming agent is degreasing aluminium powder, 0.013~0.018mm of particle diameter, Al content >=99.5%；Foam stabilizer is oxirane, fat
One kind in alcohol ether, Oxidized paraffin wax；Additive is one kind in barium stearate, zinc stearate, calcium stearate.
The hydrophober is one kind in aliphatic acid potassium, methyl silicon sodium alcoholate, ethyl sodium silanolate；Diluent is pure water.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
The production process first step：Aggregate semi-finished product are made in materials described below ratio by weight.
By the selection of national building standard and storage material, various raw materials are inputted by raw material cabin by conveyer；During production by
Conveyer output, electronic scale automatic gauge；Raw material ratio by weight includes：
18 parts of P.O42.5MPa Portland cements；60 parts of iron tailings powder；3 parts of gypsum；18.45 parts of quick lime；It is poly-
0.25 part of the compound early strength agent of carboxylic acid；0.1 part of oxirane；0.15 part of barium stearate.
Above raw material adds material agitator, after being mixed evenly, by ratio of water to material 0.55 plus water, stirs 1.5min.
The parts by weight of degreasing aluminium powder 0.05 are poured into foaming machine, add the water of 0.3 parts by weight in addition, foaming is stirred into and suspends
Liquid.
1min adds foaming suspension and remixes stirring 40s, injection molding machine and on machine 50~60 before material cast
Tentatively maintenance 2h at a temperature of DEG C.
Aggregate semi-finished product after preliminary maintenance are voluntarily stripped, and enter steam pressure groove, are sent to autoclave and are carried out steam press maintenance, steam pressure is supported
Operating pressure during shield is controlled in 1.80MPa, and temperature control is at 215 DEG C.
After steam press maintenance terminates, natural curing 28 days, dry kiln is sent into, dries 24h to the drying of aggregate semi-finished product；Then press
According to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is detected：Entity density 850
~900kg/m3, 8.5~11.0MPa of compression strength is qualified；Actually detected result：Entity density 850kg/m3, compression strength
8.5；Qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein the volume of 10~15mm grades contains
Amount accounts for 60, bulk density 400kg/m3；Cylindrical compress strength 3.3MPa；Aggregate semi-finished granules material input semi-finished product storehouse is standby.
Production process second step is that materials described below ratio by weight is made into lightweight aggregate finished product.
By 1 part of aliphatic acid potassium, 15 parts of pure water, measure by weight, be well mixed after injection immersion trough and immersion liquid is made.
After immersion liquid is made, the parts by weight of aggregate semi-finished granules material 20 are subjected to immersion liquid, immersion liquid time by bucket conveyor
3s；Drying control tower is promoted to after immersion liquid, dries time 30h to the drying of particles of aggregates material.
Lightweight aggregate product inspection：Water absorption rate≤0.5%.
Particles of aggregates material finished product after the assay was approved is sent into finished bin.
【Embodiment 2】
The production process first step：Aggregate semi-finished product are made in materials described below ratio by weight.
By the selection of national building standard and storage material, various raw materials are inputted by raw material cabin by conveyer；During production by
Conveyer output, electronic scale automatic gauge；Raw material ratio by weight includes：
18 parts of P.O42.5MPa Portland cements；58 parts of iron tailings powder；3.4 parts of gypsum；20 parts of quick lime；Poly- carboxylic
Compound 0.295 part of the early strength agent of acid；0.1 part of fatty alcohol ether；0.15 part of zinc stearate.
Above raw material adds material agitator, after being mixed evenly, by ratio of water to material 0.50 plus water, stirs 1.5min.
The parts by weight of degreasing aluminium powder 0.055 are poured into foaming machine, add the water of 1.0 parts by weight in addition, foaming is stirred into and suspends
Liquid.
0.5min adds foaming suspension and remixes stirring 50s before material cast, and injection molding machine and on machine 50~
Tentatively maintenance 2h at a temperature of 60 DEG C.
Aggregate semi-finished product after preliminary maintenance are voluntarily stripped, and enter steam pressure groove, are sent to autoclave and are carried out steam press maintenance, steam pressure is supported
Operating pressure during shield is controlled in 1.85MPa, and temperature control is at 205 DEG C.
After steam press maintenance terminates, natural curing 28 days, dry kiln is sent into, dries 28h to the drying of aggregate semi-finished product；Then press
According to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is tested.Entity density 850
~900kg/m3, 8.5~11.0MPa of compression strength is qualified；Actually detected result：Entity density 875kg/m3, compression strength
9.5MPa；Qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein the volume of 10~15mm grades
Content accounts for 63%, bulk density 410kg/m3；Cylindrical compress strength 3.4MPa.
Aggregate semi-finished granules material input semi-finished product storehouse is standby.
Production process second step is that materials described below ratio by weight is made into lightweight aggregate finished product.
By 1 part of methyl silicon sodium alcoholate, 20 parts of pure water, measure by weight, be well mixed after injection immersion trough and immersion liquid is made.
After immersion liquid is made, the parts by weight of aggregate semi-finished granules material 20 are subjected to immersion liquid, immersion liquid time by bucket conveyor
3s；Drying control tower is promoted to after immersion liquid, dries time 24h to the drying of particles of aggregates material.
Lightweight aggregate product inspection：Water absorption rate≤0.5%.
Particles of aggregates material finished product after the assay was approved is sent into finished bin.
【Embodiment 3】
The production process first step：Aggregate semi-finished product are made in materials described below ratio by weight.
By the selection of national building standard and storage material, various raw materials are inputted by raw material cabin by conveyer；During production by
Conveyer output, electronic scale automatic gauge；Raw material ratio by weight includes：
18 parts of P.O42.5MPa Portland cements；58.5 parts of iron tailings powder；3.36 parts of gypsum；Quick lime 19.5
Part；The compound early strength agent of polycarboxylic acids：0.28 part；0.1 part of Oxidized paraffin wax；0.2 part of calcium stearate；
Above raw material adds material agitator, after being mixed evenly, by ratio of water to material 0.50 plus water, stirs 1.5min.
The parts by weight of degreasing aluminium powder 0.06 are poured into foaming machine, the another parts by weight of external adding water 1.2, stir into foaming suspension.
1min adds foaming suspension and remixes stirring 40s, injection molding machine and on machine 50~60 before material cast
DEG C preliminary maintenance 2h.
Aggregate semi-finished product after preliminary maintenance are voluntarily stripped, and enter steam pressure groove, are sent to autoclave and are carried out steam press maintenance, steam pressure is supported
Operating pressure during shield is controlled in 1.85MPa, and temperature control is at 215 DEG C.
After steam press maintenance terminates, natural curing 28 days, dry kiln is sent into, dries 24h to the drying of aggregate semi-finished product；Then press
According to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is tested.Entity density 850
~900kg/m3, 8.5~11.0MPa of compression strength is qualified；Actually detected result：Entity density 880kg/m3, compression strength
10.5MPa；Qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein the body of 10~15mm grades
Product content accounts for 63%, bulk density 418kg/m3；Cylindrical compress strength 3.75MPa.
Aggregate semi-finished granules material input semi-finished product storehouse is standby.
Production process second step is that materials described below ratio by weight is made into lightweight aggregate finished product.
By 1 part of ethyl sodium silanolate, 18 parts of pure water, measure by weight, be well mixed after injection immersion trough and immersion liquid is made.
After immersion liquid is made, the parts by weight of aggregate semi-finished granules material 18 are subjected to immersion liquid, immersion liquid time by bucket conveyor
2s；Drying control tower is promoted to after immersion liquid, dries time 26h to the drying of particles of aggregates material.
Lightweight aggregate product inspection：Water absorption rate≤0.5%.
Particles of aggregates material finished product after the assay was approved is sent into finished bin.
【Embodiment 4】
The production process first step：Aggregate semi-finished product are made in materials described below ratio by weight.
By the selection of national building standard and storage material, various raw materials are inputted by raw material cabin by conveyer；During production by
Conveyer output, electronic scale automatic gauge；Raw material ratio by weight includes：
20 parts of P.O42.5MPa Portland cements；55.5 parts of iron tailings powder；3.4 parts of gypsum；20.5 parts of quick lime；
0.3 part of the compound early strength agent of polycarboxylic acids；0.1 part of fatty alcohol ether；0.15 part of calcium stearate；
Above raw material adds material agitator, after being mixed evenly, by ratio of water to material 0.55 plus water, stirs 1.5min.
By degreasing aluminium powder, 0.055 part is poured into foaming machine, is added 1.1 parts of water in addition, is stirred into foaming suspension.
1min adds foaming suspension and remixes stirring 40s, injection molding machine and on machine 50~60 before material cast
DEG C preliminary maintenance 2h.
Aggregate semi-finished product after preliminary maintenance are voluntarily stripped, and enter steam pressure groove, are sent to autoclave and are carried out steam press maintenance, steam pressure is supported
Operating pressure during shield is controlled in 1.85MPa, and temperature control is at 215 DEG C.
After steam press maintenance terminates, natural curing 28 days, dry kiln is sent into, dries 24h to the drying of aggregate semi-finished product；Then press
According to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is tested.Entity density 850
~900kg/m3, 8.5~11.0MPa of compression strength is qualified；Actually detected result：Entity density 890kg/m3, compression strength
10.8MPa；Qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein the body of 10~15mm grades
Product content accounts for 63%, bulk density 420kg/m3；Cylindrical compress strength 4.0MPa.
Aggregate semi-finished granules material input semi-finished product storehouse is standby.
Production process second step is that materials described below ratio by weight is made into lightweight aggregate finished product.
By 1 part of aliphatic acid potassium, 20 parts of pure water, measure by weight, be well mixed after injection immersion trough and immersion liquid is made.
After immersion liquid is made, the parts by weight of aggregate semi-finished granules material 20 are subjected to immersion liquid, immersion liquid time by bucket conveyor
3s；Drying control tower is promoted to after immersion liquid, dries time 28h to the drying of particles of aggregates material.
Lightweight aggregate product inspection：Water absorption rate≤0.5%.
Particles of aggregates material finished product after the assay was approved is sent into finished bin.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (1)
1. a kind of production method of concrete lightweight aggregate, it is characterised in that comprise the following steps：
1) the aggregate semi-finished product of concrete lightweight aggregate are prepared；
A) aggregate semi-finished product are made up of following raw materials in parts by weight ratio：18~20 parts of binder materials；55~60 parts of fine aggregate；Adjust
Save 3~5 parts of agent；18~25 parts of reinforcing agent；0.25~0.3 part of coagulant；0.05~0.1 part of foaming agent；Foam stabilizer 0.05~0.1
Part；0.15~0.2 part of additive；Ratio of water to material 0.45~0.55；Wherein：
The binder materials is P.O42.5MPa Portland cements；Fine aggregate is 0.10~0.5mm of particle diameter iron tailings powder,
Clay content ＜ 3%；Conditioning agent be 0.05~0.07mm of particle diameter gypsum, CaSO4·2H2O content >=90%；Reinforcing agent is grain
0.05~0.07mm of footpath quick lime, CaO content >=80%；Coagulant is the compound early strength agent of polycarboxylic acids, solid content >=30%；
Foaming agent is degreasing aluminium powder, 0.013~0.018mm of particle diameter, Al content >=99.5%；Foam stabilizer be oxirane, fatty alcohol ether,
One kind in oxidized paraffin wax soap；Additive is one kind in barium stearate, zinc stearate, calcium stearate；
B) raw material in addition to foaming agent and water is exported by material conveyor respectively, electronic scale automatic gauge adds material stirring
Machine, after being mixed evenly, 1.5~2min is stirred by ratio of water to material plus water；Foaming agent is poured into foaming machine, by foaming agent：Water
=1：5~7 ratio adds water to stir into foaming suspension；
C) 0.5~1min adds foaming suspension and remixes 40~50s of stirring before material cast, injection molding machine and on machine
50~60 DEG C of insulation, it is preliminary to conserve more than 2h；
D) enter steam pressure groove after the aggregate semi-finished product demoulding after preliminary maintenance, be sent to autoclave and carry out steam press maintenance, steam press maintenance mistake
Operating pressure in journey is controlled in 1.80~1.85MPa, and temperature control is at 205~215 DEG C；
E) after steam press maintenance terminates, dry kiln is sent into natural curing 28~30 days, and drying time >=24h to aggregate semi-finished product is done
It is dry；Then according to GB/T11969《Steam-pressing aero-concrete method for testing performance》The performance of aggregate semi-finished product is detected：It is real
850~900kg/m of volume density3, 8.5~11.0MPa of compression strength is qualified；
F) qualified aggregate semi-finished product are processed into 5~20mm of particle diameter particulate material after testing, wherein the volume of 10~15mm grades
Content accounts for 60~65%, 400~425kg/m of bulk density3, 3.2~4.2MPa of cylindrical compress strength, manufactured aggregate semi-finished granules
Material input semi-finished product storehouse is standby；
2) concrete lightweight aggregate finished product is prepared；
G) following raw material ratio by weight is stocked up, 1 part of hydrophober, 15~20 parts of diluent, aggregate semi-finished granules material 15
~20 parts；
The hydrophober is one kind in aliphatic acid potassium, methyl silicon sodium alcoholate, ethyl sodium silanolate；Diluent is pure water；
H) hydrophober is measured by weight with diluent, be well mixed after injecting immersion trough；After immersion liquid is made, by aggregate semi-finished product
Particulate material carries out immersion liquid, 2~3s of immersion liquid time by bucket conveyor；Particles of aggregates material after immersion liquid is promoted to drying control tower,
Dry 24h hours with up to dry after be lightweight aggregate finished product；
I) lightweight aggregate finished product is sent into finished bin or dispatched from the factory after product inspection is qualified.
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| CN111320445A (en) * | 2020-01-16 | 2020-06-23 | 湖北三鑫金铜股份有限公司 | Method for preparing cement-based recycled aggregate from fine copper tailings |
| CN111689727A (en) * | 2020-04-30 | 2020-09-22 | 吴江笨鸟墙面科技有限公司 | Preparation method of foam concrete thermal insulation brick |
| CN113149691A (en) * | 2021-04-06 | 2021-07-23 | 广西军泰建材有限公司 | Shrinkage-resistant segregation-resistant concrete and preparation method thereof |
| CN114477592A (en) * | 2022-02-08 | 2022-05-13 | 广东台泉环保科技有限公司 | High-salt desalting evaporation equipment and method |
| CN114751684A (en) * | 2022-05-10 | 2022-07-15 | 合肥仁创铸造材料有限公司 | Baking-free iron tailing ceramsite and pervious concrete and preparation method thereof |
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| CN104478362B (en) * | 2014-12-24 | 2017-05-10 | 徐立新 | Self-insulation foam concrete building block as well as manufacturing technology and mounting method |
| CN104556865A (en) * | 2014-12-24 | 2015-04-29 | 齐齐哈尔越峰科技有限公司 | Preparation method of light-weight composite fiber foamed concrete |
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