CN109133778A - The preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete - Google Patents
The preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete Download PDFInfo
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- CN109133778A CN109133778A CN201810966580.8A CN201810966580A CN109133778A CN 109133778 A CN109133778 A CN 109133778A CN 201810966580 A CN201810966580 A CN 201810966580A CN 109133778 A CN109133778 A CN 109133778A
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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
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- 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
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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
-
- 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 the preparation methods of residual active sludge and mud mixed type foamed plastics lightweight concrete, residual active sludge and mud is taken to be placed in anaerobic sludge pond, add distilled water and surfactant, then white lime and sodium thiosulfate are added, anaerobic fermentation after stirring, it is passed through oxygen again and cationic polyacrylamide is added, then carries out heated at constant temperature, saturation FeCl is added dropwise3Solution, alkaline fungicide is added after stirring, it is first placed in high pressure sterilization kettle and handles, it is ultrasonically treated again, curing agent cement, adhesive, chelating agent, flyash and fiber are added after being finally separated by solid-liquid separation, raw material soil paste is obtained after being stirred, and light material then is added and silicon powder obtains lightweight concrete.The present invention can be effectively improved the mechanical property of lightweight concrete, and lightweight concrete intensity obtained is high, and commodity are not easy to crack, have waterproof performance, can be widely applied to construction industry, play promotion and impetus for the effective use of residual active sludge and dredging silt.
Description
Technical field
The invention belongs to transportation building engineering material technical fields, mixed more particularly to a kind of residual active sludge and mud
The preparation method of mould assembly formed plastic light concrete.
Background technique
Residual active sludge is from the activated sludge outside secondary sedimentation tank (or settling zone) discharge system.In biochemical treatment
Cheng Zhong, the microorganism in activated sludge constantly consume the organic substance in waste water.In the organic substance being consumed, a part
It being oxidized with energy needed for providing microbial life activity, another part is then utilized by microorganism to synthesize new cytoplasm,
To make microbial proliferation reproduction, microorganism is while metabolism, and some old microorganism is dead, therefore produces
Residual active sludge.Residual active sludge is the by-product generated in sewage disposal process, the basic improvement of residual active sludge
Outlet is resource utilization.
China is limited currently used for the earthwork resource of engineering construction, and China coast harbour coastal engineering, cruiseway are dredged
Starting for engineering and inland lake environmental improvement engineering is dredged, the generation of a large amount of dredging silt has become certainty.But it dredges
It dredges the nearest of mud and abandons that the pollutant buried can generate when occupying cultivated land, stacking is spread, the environment such as polluted river and marine environment are asked
Topic, therefore environmental pollution brought by the dredging silt largely generated, it has also become our current urgent problems to be solved.
The soil source of current formed plastic light concrete is generally dredging silt, the bubble prepared using dredging silt
Foam plastics lightweight concrete has soil property light, and the high feature of intensity, general wet density theoretical value is between 0.5-1.2g/cm3Between,
Dry density theoretical value is between 0.4-0.8 g/cm3Between, 28 days theoretical value intensity can disappear generally between 100-1000kPa
Change dredging silt, used foamed plastics, there is waste utilization and environmental protection double benefit.
But in practical applications, it is mixed often to there is such as low strength, commodity for existing formed plastic light concrete
The problems such as solidifying soil cracking or water suction, seriously affect its being widely used in construction industry.How formed plastic light is effectively improved
The intensity of concrete prevents crack in commodity concrete, reduces its water imbibition, at the same realize residual active sludge and dredging silt this
The comprehensive utilization of two kinds of wastes is an important technological problems urgently to be resolved at present.
Summary of the invention
The purpose of the present invention is for low strength existing for existing formed plastic light concrete, product cracking or water suction
The problems such as, the preparation method of a kind of residual active sludge and mud mixed type foamed plastics lightweight concrete is provided, which is effectively improved
The mechanical property of lightweight concrete, lightweight concrete intensity obtained is high, and commodity are not easy to crack, has waterproof performance, can be extensive
Applied to construction industry, promotion and impetus are played for the effective use of residual active sludge and dredging silt.
The present invention is achieved by the following technical solutions:
The preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete, comprising the following steps:
(1) residual active sludge of 20-40 parts by weight and the mud merging anaerobic sludge pond of 40-60 parts by weight are taken, distilled water is added
After dilution, surfactant is added, is stood overnight after stirring 4-5 h, obtains mixed liquor I；
(2) white lime of 10-20 parts by weight and the thiosulfuric acid of 5-10 parts by weight are added in the mixed liquor I obtained to step (1)
Sodium stirs at a temperature of 45-50 DEG C, and anaerobic fermentation 2-3 days to mixed liquor I in sposh state；Oxygen is passed through again to carry out at aeration
Reason, and the cationic polyacrylamide that 3-8 parts by weight are added is dehydrated mud mixture, after separation of solid and liquid, washes Solid content 2-3
It is secondary, obtain deodorization residual active sludge and mud mixed liquor II；
(3) heated at constant temperature at a temperature of the mixed liquor II for obtaining step (2) is placed in 60-70 DEG C, is added dropwise mass fraction 4-
8% saturation FeCl3Solution, it is stirring while adding, it stands overnight at room temperature, obtains modified residual active sludge and mud mixed liquor
Ⅲ；
(4) the alkaline fungicide of mass fraction 5-10% is added in the mixed liquor III that step (3) obtains, first sets after mixing evenly
Enter in high pressure sterilization kettle and inactivate 45-60min at 120-130 DEG C, after carry out ultrasonic treatment 1-2h again, finally carry out solid-liquid point
From washing Solid content obtains inactivating modified residual active sludge and mud mixed liquor IV；
(5) the curing agent cement of 10-20 parts by weight, the bonding of 2-5 parts by weight are added in the mixed liquor IV that step (4) obtains
Agent, the chelating agent of 1-5 parts by weight, the flyash of 5-10 parts by weight and the fiber of 5-10 parts by weight, through blender at mixing
Raw material soil paste is obtained after uniform stirring mixing in reason device；
(6) light material of 1-5 parts by weight and the silicon powder of 4-10 parts by weight are added in the raw material soil paste that step (5) obtains, stirs
Residual active sludge and mud mixed type foamed plastics particle light mixed soil are obtained after mixing uniformly.
The technical solution that the present invention further solves is that the additional amount of distilled water described in step (1) is that residual activity is dirty
The 40-50% of mud and mud total weight, the additional amount of the surfactant are the 4- of residual active sludge and mud total weight
6%。
The technical solution that the present invention further solves is that the surfactant includes dodecyl sodium sulfate, dodecane
One of base sodium sulphate, cetyl trimethylammonium bromide or 4 bromide are a variety of.
The technical solution that the present invention further solves is that the muddy water of sposh state is mixed in Air Exposure described in step (2)
Closing dissolved oxygen content in object is 2.0-2.5mg/L.
The technical solution that the present invention further solves is that alkalinity fungicide described in step (4) is lime sulfur or bohr
More liquid.
The technical solution that the present invention further solves is that in ultrasonic treatment described in step (4), the frequency of ultrasonic wave is
30-40 KHz, ultrasound intensity 80-100DB.
The technical solution that the present invention further solves is, in step (5), the curing agent cement include portland cement,
Any one of pozzolan cement, portland blast-furnace slag cement；Described adhesive includes starch-hydrocolloid or polyethylene glycol colloid；The chela
Mixture is cyclic chelators；The fiber is the basalt fibre that is chopped.
The technical solution that the present invention further solves is that the cyclic chelators include that porphyrin analog derivative or crown ether-like are spread out
Biology；The chopped basalt fibre length is 5-10mm, density 3.0-3.5g/cm3。
The technical solution that the present invention further solves is that light material described in step (6) includes expanded polystyrene (EPS)
Any one of grain, waste plastic foam and waste tire particle.
The technical solution that the present invention further solves is that the density of the expanded polystyrene particle is 0.02-0.04g/
cm3, partial size 1-3mm.
Method of the present invention, step (1) is middle to be added surfactant, the live end and residual activity of surfactant
The affine absorption of biological surface in sludge and dredging silt, is then presented lipophilicity without live end, make residual active sludge and
Substance in dredging silt is uniformly dispersed, and is conducive to handle in next step；In step (2) be passed through oxygen can effective deodorization, make residue
Biomass in activated sludge and dredging silt corrupt will not foul, and becoming residual active sludge applied to lightweight concrete can
Energy；Saturation FeCl is added dropwise in step (3)3Solution forms ferric hydroxide colloid, and ferric hydroxide colloid makes residual active sludge and dredges
It dredges mud and generates gelatinization results, micro- aggregation that gelling forms ionic bond absorption is cementing, and cementing micro- aggregation is in evenly dispersed shape
State is conducive to handle in next step；Alkaline fungicide is added in step (4), the hydrochloric acid that on the one hand can be generated in neutralization procedure (3), separately
On the one hand sterilization inactivation treatment can be further carried out to residual active sludge and dredging silt, ultrasound is combined with what is be separated by solid-liquid separation
Using realizing the high-efficiency dehydration to residual active sludge and dredging silt；It becomes silted up in step (5) in residual active sludge and dredging
After curing agent cement is added in mud, curing agent cement particle aquation generates silicate cement compound, with residual active sludge and dredging
The cementing biggish granule body of formation of micro- aggregation in mud, meanwhile, web trellis, the rod of the generation of curing agent hydrated cementitious
Shape, hexagonal plate product are filled in the hole between granule body, and it is chain to play the role of drawknot, and residual active sludge and dredging are become silted up
The microstructure of mud is transformed into extremely strong network-like cement structure, and the raw material soil paste in the present invention plays skeleton function, is used for
Undertake most load；The addition of portland cement in curing agent cement increases the free hydroxyl in raw material, promotes
Reaction between each material composition, meanwhile, hydrated calcium silicate can be equally generated after hydrated cementitious, can also further increase gelling
The generation of substance guarantees the gelatinization results of raw material obtained to the greatest extent, has wider application range；Flyash is added
Afterwards, the silica in flyash, aluminium oxide are reacted with the inorganic matter in residual active sludge and dredging silt, generate aquation silicic acid
Calcium and drated calcium aluminate promote the generation of gum material；The addition of adhesive and chelating agent further enhances micro- aggregation glue
The crosslinked action of knot, starch-hydrocolloid or polyethylene glycol colloid in adhesive play the role of physical adherence, and chelating agent then plays
The effect of chemical adhesion, the two complement each other, make micro- aggregation it is cementing between cross link force it is strong, granule body stable structure；Fiber
It is added, further enhances the skeleton function of raw material soil paste, fiber inhibits to shrink, increases toughness, and skeleton is made to undertake load capacity
It further enhances, while guaranteeing that commodity are not easy to crack；There is the particle of light material metathesis and space to imitate in step (6)
It answers, reduces a part of intensity of raw material soil paste skeleton, so that soil property lightens, while playing waterproof performance；The addition of silicon powder rises
To catalysis, early cure material effects；The silicon powder in flyash and step (6) in step (5) interacts, and is effectively improved original
The mechanical property for expecting soil paste, makes raw material soil paste unconfined compressive strength reach as high as 400kPa, while cost is reduced, into one
Step expands the application field of lightweight concrete.
The invention has the benefit that
1, a kind of preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete provided by the invention, the method have
Effect improves the mechanical property of lightweight concrete, and lightweight concrete intensity obtained is high, and commodity are not easy to crack, has waterproof performance,
It can be widely applied to construction industry, play promotion and impetus for the effective use of residual active sludge and dredging silt.
2, alkaline fungicide is added in the present invention in processing step, on the one hand can neutralize the hydrochloric acid of generation, on the other hand may be used
Sterilization inactivation treatment, ultrasound and the use in conjunction being separated by solid-liquid separation further are carried out to residual active sludge and dredging silt, it is real
The high-efficiency dehydration to residual active sludge and dredging silt is showed.
3, curing agent cement is added in residual active sludge and dredging silt and forms biggish granule body by the present invention, together
When, web trellis, rod shape, the hexagonal plate product of curing agent hydrated cementitious generation are filled in the hole between granule body,
It is chain to play the role of drawknot；After flyash is added, silica, aluminium oxide and residual active sludge and dredging silt in flyash
In inorganic matter reaction, generate hydrated calcium silicate and drated calcium aluminate, promote the generation of gum material.
4, the present invention in adhesive and chelating agent addition, further enhance the cementing crosslinked action of micro- aggregation, glue
Starch-hydrocolloid or polyethylene glycol colloid in mixture play the role of physical adherence, and chelating agent then plays chemical adhesion,
The two complements each other, make micro- aggregation it is cementing between cross link force it is strong, granule body stable structure.
5, the particle of light material has metathesis and three-dimensional effect in the present invention, reduces the one of raw material soil paste skeleton
Partial intensities so that soil property lightens, while playing waterproof performance；Catalysis, early cure material effects are played in the addition of silicon powder；
Flyash and silicon powder interact, and are effectively improved the mechanical property of raw material soil paste, make raw material soil paste unconfined compressive strength highest
Up to 400kPa, while cost is reduced, the further expansion application field of lightweight concrete.
Specific embodiment
Summary of the invention of the invention is further described below with reference to embodiment.
Embodiment 1
The preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete, comprising the following steps:
(1) residual active sludge of 20 parts by weight and the mud merging anaerobic sludge pond of 40 parts by weight are taken, distilled water is added to dilute,
The additional amount of distilled water is the 40% of residual active sludge and mud total weight, adds dodecyl sodium sulfate, dodecyl sulphur
The addition weight of sour sodium is the 4% of residual active sludge and mud total weight, stands overnight after stirring 4h, obtains mixed liquor I；
(2) white lime and 5 parts by weight sodium thiosulfate of 10 parts by weight are added into mixed liquor I, is stirred, and temperature is maintained at 45
DEG C, anaerobic fermentation 2 days, until mixed liquor I is in sposh state, then it is passed through oxygen, carries out Air Exposure, make the muddy water of sposh state
Dissolved oxygen reaches 2.0mg/L in mixture, adds the cationic polyacrylamide of 3 parts by weight, is dehydrated mud mixture, from
It after the heart, washes Solid content 2 times, then is centrifuged to get deodorization residual active sludge and mud mixed liquor II is arrived；
(3) saturation for being equivalent to II weight 4% of mixed liquor is added dropwise in the at a temperature of heated at constant temperature by mixed liquor II at 60 DEG C
FeCl3Solution, it is stirring while adding, it is saturated FeCl3It after solution is added, is stored at room temperature overnight, obtains modified residual active sludge
With mud mixed liquor III；
(4) lime sulfur for being equivalent to III weight 5% of mixed liquor is added in mixed liquor III, is placed in high pressure sterilization after mixing evenly
45min is inactivated in kettle at 121 DEG C, then ultrasonic treatment 1h is carried out using low frequency high-strength ultrasonic, control ultrasonic power is
30KHz, ultrasound intensity 80DB, is then separated by solid-liquid separation, and is washed Solid content, then be centrifuged, is obtained inactivating modified residual activity
Sludge and mud mixed liquor IV；
(5) portland cement of 10 parts by weight, the starch-hydrocolloid of 2 parts by weight, the ring-type of 1 parts by weight are added in mixed liquor IV
The chopped basalt fibre of chelating agent, the flyash of 5 parts by weight and 5 parts by weight is carried out in hybrid processor by blender
It is stirred, until being uniformly mixing to obtain raw material soil paste；The cyclic chelators are porphyrin analog derivative, the chopped basalt
Fibre length is 5mm, density 3.0g/cm3
(6) silicon powder of the expanded polystyrene particle of 1 parts by weight and 4 parts by weight is added to the soil of the raw material in hybrid processor
In slurry, residual active sludge and mud mixed type foamed plastics particle light mixed soil are then obtained after mixing evenly；The hair
The density of foamed polystyrene particle is 0.03g/cm3, partial size 2mm.
Show by test: the residual active sludge and mud mixed type foamed plastics lightweight that the present embodiment is prepared are mixed
Solidifying soil conserves under standard atmospheric pressure, 20 DEG C of the temperature standard conditions with humidity 100%, and the real density of 28d is 0.942g/cm3,
Unconfined compressive strength is 389kPa, and the total amount of the cementitious material of lightweight concrete is suitable in product, makes lightweight concrete surface
Closely knit solidification will not generate the crack caused by dry shrink while having water-proof function, receive in addition, fiber can play inhibition
Contracting, the effect for increasing toughness, therefore the product prepared is not easy to crack, good product quality, use scope is extensive.
Embodiment 2
The preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete, comprising the following steps:
(1) residual active sludge of 40 parts by weight and the mud merging anaerobic sludge pond of 60 parts by weight are taken, distilled water is added to dilute,
The additional amount of distilled water is the 50% of residual active sludge and mud total weight, adds cetyl trimethylammonium bromide, 16
The addition weight of alkyl trimethyl ammonium bromide is the 6% of residual active sludge and mud total weight, stands overnight, obtains after stirring 5h
To mixed liquor I；
(2) white lime and 10 parts by weight sodium thiosulfate of 20 parts by weight are added into mixed liquor I, is stirred, and temperature is maintained at 50
DEG C, anaerobic fermentation 3 days, until mixed liquor I is in sposh state, then it is passed through oxygen, carries out Air Exposure, make the muddy water of sposh state
Dissolved oxygen reaches 2.5mg/L in mixture, adds the cationic polyacrylamide of 8 parts by weight, is dehydrated mud mixture, from
It after the heart, washes Solid content 3 times, then is centrifuged to get deodorization residual active sludge and mud mixed liquor II is arrived；
(3) saturation for being equivalent to II weight 8% of mixed liquor is added dropwise in the at a temperature of heated at constant temperature by mixed liquor II at 70 DEG C
FeCl3Solution, it is stirring while adding, it is saturated FeCl3It after solution is added, is stored at room temperature overnight, obtains modified residual active sludge
With mud mixed liquor III；
(4) Bordeaux mixture for being equivalent to III weight 10% of mixed liquor is added in mixed liquor III, is placed in high pressure after mixing evenly and goes out
60min is inactivated in bacterium kettle at 130 DEG C, then ultrasonic treatment 2h is carried out using low frequency high-strength ultrasonic, control ultrasonic power is
40KHz, ultrasound intensity 100DB, is then separated by solid-liquid separation, and is washed Solid content, then be centrifuged, is obtained inactivating modified residual activity
Sludge and mud mixed liquor IV；
(5) it is added the pozzolan cement of 20 parts by weight in mixed liquor IV, the polyethylene glycol colloid of 5 parts by weight, 5 parts by weight
The chopped basalt fibre of cyclic chelators, the flyash of 10 parts by weight and 10 parts by weight, passes through stirring in hybrid processor
Machine is stirred mixing, until being uniformly mixing to obtain raw material soil paste；The cyclic chelators are crown ether analog derivative, described to be chopped
Basalt fibre length is 10mm, density 3.5g/cm3
(6) the raw material soil paste being added to the silicon powder of the waste plastic foam of 5 parts by weight and 10 parts by weight in hybrid processor
In, residual active sludge and mud mixed type foamed plastics particle light mixed soil are then obtained after mixing evenly.
Show by test: the residual active sludge and mud mixed type foamed plastics lightweight that the present embodiment is prepared are mixed
Solidifying soil conserves under standard atmospheric pressure, 18 DEG C of the temperature standard conditions with humidity 100%, and the real density of 28d is 0.971g/cm3,
Unconfined compressive strength is 402kPa, and the total amount of the cementitious material of lightweight concrete is suitable in product, makes lightweight concrete surface
Closely knit solidification will not generate the crack caused by dry shrink while having water-proof function, receive in addition, fiber can play inhibition
Contracting, the effect for increasing toughness, therefore the product prepared is not easy to crack, good product quality, use scope is extensive.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (10)
1. the preparation method of residual active sludge and mud mixed type foamed plastics lightweight concrete, which is characterized in that including following step
It is rapid:
(1) residual active sludge of 20-40 parts by weight and the mud merging anaerobic sludge pond of 40-60 parts by weight are taken, distilled water is added
After dilution, surfactant is added, is stood overnight after stirring 4-5 h, obtains mixed liquor I；
(2) white lime of 10-20 parts by weight and the thiosulfuric acid of 5-10 parts by weight are added in the mixed liquor I obtained to step (1)
Sodium stirs at a temperature of 45-50 DEG C, and anaerobic fermentation 2-3 days to mixed liquor I in sposh state；Oxygen is passed through again to carry out at aeration
Reason, and the cationic polyacrylamide that 3-8 parts by weight are added is dehydrated mud mixture, after separation of solid and liquid, washes Solid content 2-3
It is secondary, obtain deodorization residual active sludge and mud mixed liquor II；
(3) heated at constant temperature at a temperature of the mixed liquor II for obtaining step (2) is placed in 60-70 DEG C, is added dropwise mass fraction 4-
8% saturation FeCl3Solution, it is stirring while adding, it stands overnight at room temperature, obtains modified residual active sludge and mud mixed liquor
Ⅲ；
(4) the alkaline fungicide of mass fraction 5-10% is added in the mixed liquor III that step (3) obtains, first sets after mixing evenly
Enter in high pressure sterilization kettle and inactivate 45-60min at 120-130 DEG C, after carry out ultrasonic treatment 1-2h again, finally carry out solid-liquid point
From washing Solid content obtains inactivating modified residual active sludge and mud mixed liquor IV；
(5) the curing agent cement of 10-20 parts by weight, the bonding of 2-5 parts by weight are added in the mixed liquor IV that step (4) obtains
Agent, the chelating agent of 1-5 parts by weight, the flyash of 5-10 parts by weight and the fiber of 5-10 parts by weight, through blender at mixing
Raw material soil paste is obtained after uniform stirring mixing in reason device；
(6) light material of 1-5 parts by weight and the silicon powder of 4-10 parts by weight are added in the raw material soil paste that step (5) obtains, stirs
Residual active sludge and mud mixed type foamed plastics particle light mixed soil are obtained after mixing uniformly.
2. the preparation method of residual active sludge according to claim 1 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, the additional amount of distilled water described in step (1) is the 40-50% of residual active sludge and mud total weight, the table
The additional amount of face activating agent is the 4-6% of residual active sludge and mud total weight.
3. the preparation method of residual active sludge according to claim 2 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, the surfactant includes dodecyl sodium sulfate, lauryl sodium sulfate, cetyl trimethylammonium bromide
Or one of 4 bromide or a variety of.
4. the preparation method of residual active sludge according to claim 1 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, dissolved oxygen content is 2.0-2.5mg/L in the mud mixture of sposh state in Air Exposure described in step (2).
5. the preparation method of residual active sludge according to claim 1 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, alkalinity fungicide described in step (4) is lime sulfur or Bordeaux mixture.
6. the preparation method of residual active sludge according to claim 1 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, in ultrasonic treatment described in step (4), the frequency of ultrasonic wave is 30-40 KHz, ultrasound intensity 80-
100DB。
7. the preparation method of residual active sludge according to claim 1 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, in step (5), the curing agent cement includes portland cement, pozzolan cement, appointing in portland blast-furnace slag cement
It is a kind of；Described adhesive includes starch-hydrocolloid or polyethylene glycol colloid；The chelating agent is cyclic chelators；The fiber is short
Cut basalt fibre.
8. the preparation method of residual active sludge according to claim 7 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, the cyclic chelators include porphyrin analog derivative or crown ether analog derivative；The chopped basalt fibre length
For 5-10mm, density 3.0-3.5g/cm3。
9. the preparation method of residual active sludge according to claim 1 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, light material described in step (6) includes expanded polystyrene particle, waste plastic foam and waste tire particle
Any one of.
10. the preparation method of residual active sludge according to claim 9 and mud mixed type foamed plastics lightweight concrete,
It is characterized in that, the density of the expanded polystyrene particle is 0.02-0.04g/cm3, partial size 1-3mm.
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