CN109180101A - A kind of preparation method of civil engineering foam concrete - Google Patents
A kind of preparation method of civil engineering foam concrete Download PDFInfo
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- CN109180101A CN109180101A CN201811088943.9A CN201811088943A CN109180101A CN 109180101 A CN109180101 A CN 109180101A CN 201811088943 A CN201811088943 A CN 201811088943A CN 109180101 A CN109180101 A CN 109180101A
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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
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a kind of preparation methods of civil engineering foam concrete, it is specific the preparation method comprises the following steps: (1) by polybutylene terephthalate (PBT) be 100-105 DEG C in temperature under conditions of after forced air drying 7-9h, polybutylene terephthalate (PBT) must be dried, by dry polybutylene terephthalate (PBT) with polypropylene (4-5) in mass ratio: 1 mixes, and the polyacrylic acid zinc of 0.3-0.4 times of polybutylene terephthalate (PBT) quality is added, through melt blending, after mixing squeezes out, as-spun fibre must be mixed, spinning under conditions of as-spun fibre is 235-250 DEG C in temperature will be mixed, after being stretched to former long 4-6 times under conditions of being 40-45 DEG C in temperature, obtain composite fibre.Modified porous fiber is added when preparing foam concrete by the present invention, improve interiors of products porosity, and then improve the thermal insulation property of product, and modified porous fiber can in product preparation process adsorbable addition additive, hole in product can be made to be uniformly distributed, and then further increase the thermal insulation property of product and compression strength.
Description
Technical field
The invention belongs to no building material technical fields, and in particular to a kind of preparation side of civil engineering foam concrete
Method.
Background technique
The preparation method of foam concrete mainly includes following two at present: one kind is preformed foam mixing method, i.e., first makes
Standby foam out, then the foam prepared is mixed with cement slurry；Another kind is mixing method, the i.e. mix of concrete and foaming
It carries out simultaneously.Under normal circumstances, there is good mobile performance using the foam concrete that preformed foam mixing method is prepared, it can
To carry out long distance pumping, and the foam concrete for using mixing method to prepare then fundamentally cannot be used pumping and scene is poured
It builds.The intensity of foam concrete generates the increase of porosity and reduces with foam is introduced, and introducing foam is more, and porosity is got over
Greatly, bulk density is smaller, and intensity fall is bigger, especially in the preparation process of ultralight foam concrete, since intensity is inclined
It is low, therefore very stringent to the performance requirement of cementitious material, cementitious material early strength with higher used by not requiring nothing more than, compared with
Fast setting time will also have the features such as early strength development is very fast, later strength is higher.Current light foam concrete
It is lower that there is also mechanical properties, the bad problem of compressive property, therefore, research and development using ordinary cement as major gelled material,
Economic novel light foam concrete that is durable, haveing excellent performance is imperative.
Summary of the invention
One, technical problems to be solved
The technical problem to be solved in the present invention is to provide a kind of preparation methods of civil engineering foam concrete, to solve
The technical problem.
Two, technical solution
To solve the technical problem, the technical scheme adopted by the invention is that: a kind of civil engineering foam concrete
Preparation method, it is specific the preparation method comprises the following steps:
(1) by polybutylene terephthalate (PBT) be 100-105 DEG C in temperature under conditions of after forced air drying 7-9h, obtain dry
Dry polybutylene terephthalate (PBT), by dry polybutylene terephthalate (PBT) with polypropylene (4-5) in mass ratio: 1 mixes,
And the polyacrylic acid zinc of 0.3-0.4 times of polybutylene terephthalate (PBT) quality is added, it is obtained after mixing squeezes out through melt blending
As-spun fibre is mixed, spinning under conditions of being 235-250 DEG C in temperature by mixing as-spun fibre, is 40-45 DEG C then at temperature
Under the conditions of be stretched to former long 4-6 times after, obtain composite fibre；
(2) by composite fibre and dimethylbenzene 1:(4-6 in mass ratio) it mixes, after impregnating 1-2h under room temperature, filtering,
Composite fibre must be pre-processed, after pretreatment composite fibre ethanol washing 6-10 times, obtains porous fibre；By porous fibre and carbon
The saturated solution 1:(8-10 in mass ratio of sour hydrogen calcium) mixing, after being cooled to 16-20 DEG C, filtering obtains modified porous fiber；
(3) according to parts by weight, it successively weighs: 80-110 parts of polyvinyl alcohol, 65-80 parts of gelatin, 320-420 parts of water, 35-
The hydrochloric acid that the glutaraldehyde water solution and 10-20 parts of mass fractions that 50 parts of mass fractions are 25-28% are 30-36%, by polyethylene
Alcohol is mixed with water, is 90-95 DEG C in temperature, after revolving speed stirs 50-80min under conditions of being 220-280r/min, is obtained polyethylene
Poly-vinyl alcohol solution is cooled to 50-65 DEG C, and the poly-vinyl alcohol solution after cooling is mixed with gelatin, and successively by alcoholic solution
Hydrochloric acid and glutaraldehyde water solution is added, is 30-38 DEG C in temperature, revolving speed is stirred 10- under conditions of being 250-280r/min
After 11h, filtering obtains pretreatment gel, stripping and slicing, and be washed with deionized 5-6 days, while changing a deionization every 10-11h
Water obtains gel by the gel piece after washing after being dried in vacuo 4-5h under room temperature；
(4) by gel and water 1:(5-8 in mass ratio) it mixes, and the carbomer of 0.1-0.2 times of gel quality, Yu Wen is added
Degree is 40-50 DEG C, after revolving speed is stirred 15-35min under conditions of being 240-300r/min, obtains inorganic agent gel mixture,
The pH to 7.0-7.2 of inorganic agent gel mixture is adjusted with the sodium hydroxide solution that mass-dispersion is 10-12%, filtering must block
Wave nurse gel mixture obtains pre- place under conditions of being 60-65 DEG C in temperature by carbomer gel mixture after dry 25-50min
Manage gel；
(5) pretreatment gel is mixed with graphene oxide mixture 1:(4-6 in mass ratio), in impregnating under room temperature
After 50-80min, filtering obtains filter cake, by filter cake and chitosan mixed liquor 1:(4-5 in mass ratio) it mixes, in soaking under room temperature
After steeping 30-40min, filtering obtains modified gel；
(6) according to parts by weight, 85-100 parts of portland cements are successively weighed, 35-40 parts of 30-80 mesh sand, 55-65 parts
Water, 3-7 parts of water-reducing agents, 17-25 parts of modified porous fibers, 10-18 parts of modified gels and 9-15 parts of additives, by portland cement
It is mixed with water, and sand is added, modified porous fiber, modified gel, water-reducing agent and additive are 55-60 DEG C in temperature, and revolving speed is
After being stirred 40-55min under conditions of 250-280r/min, blank is obtained, after blank is hardened 6-10h in mold, steam pressure
Maintenance, obtains foam concrete, and the water-reducing agent is sodium lignin sulfonate.
The preparation method of step (2) the calcium bicarbonate saturated solution is to heat water to 60-65 DEG C, and bicarbonate is added
Calcium filters until there is Precipitation, obtains calcium bicarbonate saturated solution.
The preparation method of step (5) the graphene oxide mixture is by graphene oxide and water in mass ratio 1:
It is mixed must to pre-process graphene oxide under conditions of power is 120-280W after sonic oscillation 20-30min for (320-400) mixing
Object is closed, pretreatment graphene oxide mixture pH to 7-8 is adjusted with the sodium hydroxide solution that mass fraction is 8-10%, must aoxidize
Graphene mixture.
The preparation method of step (5) the chitosan mixed liquor is by chitosan and water 1:(100-180 in mass ratio) it is mixed
It closes, is 45-60 DEG C in temperature, under conditions of revolving speed is 200-280r/min, after being stirred 35-60min, obtains chitosan mixing
Object obtains chitosan mixed liquor after adjusting chitosan compound pH to 3.0-3.8 with the acetic acid that mass fraction is 36-38%.
The preparation method of step (6) described additive is that (N- amidino groups) dodecylacrylamide and polyethylene glycol-is right
Tosylate (2-1) in mass ratio: 1 mixing, and polyethylene glycol -0.1-0.2 times of quality of p-methyl benzenesulfonic acid ester is added to two
Chlorobenzene and polyethylene glycol -0.08-0.12 times of quality of p-methyl benzenesulfonic acid ester ferrocene, in temperature be 50-70 DEG C, revolving speed 200-
After being stirred 1-2h under conditions of 280r/min, additive is obtained.
Three, beneficial effect
The present invention is compared to the prior art, has the following beneficial effects:
One, modified porous fiber is added when preparing foam concrete by the present invention, firstly, production is being added in modified porous fiber
It can be used as bridge after in product each substance of interiors of products links together, to make product cohesive force improve, to make product
Compression strength and cracking resistance are improved, secondly, modified porous fiber is porous structure, and inner hole deposition product has carbon after modification
Sour hydrogen calcium can decompose in product preparation process and generate gas, so that interiors of products porosity be made to improve, and then make product
Thermal insulation property improves, and modified porous fiber can in product preparation process adsorbable addition additive, and additive
It can expand after absorbing carbon dioxide, so that modified porous fiber can be scattered in product under the action of additive, Er Qieke
It is uniformly distributed hole in product, and then further increases the thermal insulation property of product and compression strength.
Two, the present invention modified gel is added when preparing foam concrete, on the one hand, gel after modification, volume
Expansion can be filled in interiors of products after being added in product, in product oxidation process, with the evaporation of gel moisture, gel
Volume reduces, so that the porosity of interiors of products be made to improve, and then improves the thermal insulation property of product, on the other hand, due to changing
Property gel surface covering possess the composite layer of chitosan and graphene oxide, thus after gel volume contraction, chitosan and oxygen
The composite layer of graphite alkene can keep original size, and then while improving interiors of products porosity, improve the anti-of product
Compressive Strength, and since the generation of internal gas can make interiors of products have certain air pressure, so that the water resistance of product be made to improve.
Specific embodiment
Below with reference to embodiment, a specific embodiment of the invention is described in detail.
Embodiment 1
(N- amidino groups) dodecylacrylamide and polyethylene glycol-p-methyl benzenesulfonic acid ester 2:1 in mass ratio are mixed in burning
In bottle, and polyethylene glycol -0.2 times of p-methyl benzenesulfonic acid ester quality paracide and polyethylene glycol-is added to toluene into flask
The ferrocene that 0.12 times of sulphonic acid ester quality is 70 DEG C in temperature, after revolving speed is stirred 2h under conditions of being 280r/min, must add
Add agent；Graphene oxide is mixed with water 1:400 in mass ratio, and by the mixture of graphene oxide and water in power be 280W
Under conditions of after sonic oscillation 30min, graphene oxide mixture must be pre-processed, the sodium hydroxide for being 10% with mass fraction is molten
Liquid adjusts pretreatment graphene oxide mixture pH to 8, obtains graphene oxide mixture；By chitosan and water in mass ratio 1:
180 mixing are 60 DEG C in temperature, under conditions of revolving speed is 280r/min, after being stirred 60min, obtain chitosan compound, use
After the acetic acid that mass fraction is 38% adjusts chitosan compound pH to 3.8, chitosan mixed liquor is obtained；By poly terephthalic acid fourth
Under conditions of diol ester is 105 DEG C in temperature after forced air drying 9h, dry polybutylene terephthalate (PBT) is obtained, by dry poly- pair
Benzene dicarboxylic acid butanediol ester is mixed with polypropylene 5:1 in mass ratio, and to dry polybutylene terephthalate (PBT) and polypropylene
Mixture in 0.4 times of polybutylene terephthalate (PBT) quality of polyacrylic acid zinc is added, through melt blending, mixing is squeezed out
Afterwards, mixing as-spun fibre is obtained, spinning under conditions of being 250 DEG C in temperature by mixing as-spun fibre, the item for being 45 DEG C then at temperature
After being stretched to former 6 times of length under part, composite fibre is obtained；Composite fibre is mixed with dimethylbenzene 1:6 in mass ratio, under room temperature
After impregnating 2h, filtering obtains pretreatment composite fibre, will pretreatment composite fibre with after ethanol washing 10 times, obtain porous fibre；It will
Porous fibre is mixed with the saturated solution of calcium bicarbonate 1:10 in mass ratio, and by the saturated solution of porous fibre and calcium bicarbonate
Mixture be cooled to 20 DEG C after, filtering, obtain modified porous fiber；According to parts by weight, it successively weighs: 110 parts of polyvinyl alcohol,
80 parts of gelatin, 420 parts of water, the hydrochloric acid that the glutaraldehyde water solution and 20 parts of mass fractions that 50 parts of mass fractions are 28% are 36%,
Polyvinyl alcohol is mixed with water, is 95 DEG C in temperature, after revolving speed stirs 80min under conditions of being 280r/min, obtains polyvinyl alcohol
Poly-vinyl alcohol solution is cooled to 65 DEG C, and the poly-vinyl alcohol solution after cooling is mixed with gelatin by solution, and successively to poly- second
Hydrochloric acid and glutaraldehyde water solution are added in the mixture of enolate solution and gelatin, is 38 DEG C in temperature, revolving speed is 280r/min's
Under the conditions of be stirred 11h after, filtering obtains pretreatment gel, will pre-process gel stripping and slicing, and be washed with deionized 6 days, together
When every 11h change a deionized water, by the gel piece after washing after being dried in vacuo 5h under room temperature, obtain gel；It will coagulate
Glue is mixed with water 1:8 in mass ratio, and the carbomer of 0.2 times of gel quality is added into the mixture of gel and water, in temperature
It is 50 DEG C, after revolving speed is stirred 35min under conditions of being 300r/min, obtains processing agent composition, is 12% with mass-dispersion
Sodium hydroxide solution adjust processing agent composition pH to 7.2 after, filtering, obtain carbomer gel mixture, carbomer coagulated
Under conditions of glue mixture is 65 DEG C in temperature after dry 50min, pretreatment gel is obtained；It will pretreatment gel and graphene oxide
Mixture 1:6 in mass ratio mixing, after impregnating 80min under room temperature, filtering obtains filter cake, filter cake is mixed with chitosan
Liquid 1:5 in mass ratio mixing, after impregnating 40min under room temperature, filtering obtains modified gel；According to parts by weight, successively claim
Take 100 parts of portland cements, 40 parts of sand, 65 parts of water, 7 parts of water-reducing agents, 25 parts of modified porous fibers, 18 parts of modified gels and 15 parts
Portland cement and water are mixed in blender, and sand are added into blender by additive, modified porous fiber, modified solidifying
Glue, water-reducing agent and additive are 60 DEG C in temperature, after revolving speed is stirred 55min under conditions of being 280r/min, obtain blank,
After blank is hardened 10h in mold, steam press maintenance obtains foam concrete.The preparation method of the calcium bicarbonate saturated solution
To heat water to 65 DEG C, and calcium bicarbonate is added, until there is Precipitation, filters, obtain calcium bicarbonate saturated solution.The sand
Diameter be 80 mesh.The water-reducing agent is sodium lignin sulfonate.
Embodiment 2
(N- amidino groups) dodecylacrylamide and polyethylene glycol-p-methyl benzenesulfonic acid ester 1:1 in mass ratio are mixed in burning
In bottle, and polyethylene glycol -0.1 times of p-methyl benzenesulfonic acid ester quality paracide and polyethylene glycol-is added to toluene into flask
The ferrocene that 0.08 times of sulphonic acid ester quality is 50 DEG C in temperature, after revolving speed is stirred 1h under conditions of being 200r/min, must add
Add agent；Graphene oxide is mixed with water 1:320 in mass ratio, and by the mixture of graphene oxide and water in power be 120W
Under conditions of after sonic oscillation 20min, graphene oxide mixture must be pre-processed, the sodium hydroxide for being 8% with mass fraction is molten
Liquid adjusts pretreatment graphene oxide mixture pH to 7, obtains graphene oxide mixture；By chitosan and water in mass ratio 1:
100 mixing are 45 DEG C in temperature, under conditions of revolving speed is 200r/min, after being stirred 35min, obtain chitosan compound, use
After the acetic acid that mass fraction is 36% adjusts chitosan compound pH to 3.0, chitosan mixed liquor is obtained；By poly terephthalic acid fourth
Under conditions of diol ester is 100 DEG C in temperature after forced air drying 7h, dry polybutylene terephthalate (PBT) is obtained, by dry poly- pair
Benzene dicarboxylic acid butanediol ester is mixed with polypropylene 4:1 in mass ratio, and to dry polybutylene terephthalate (PBT) and polypropylene
Mixture in 0.3 times of polybutylene terephthalate (PBT) quality of polyacrylic acid zinc is added, through melt blending, mixing is squeezed out
Afterwards, mixing as-spun fibre is obtained, spinning under conditions of being 235 DEG C in temperature by mixing as-spun fibre, the item for being 40 DEG C then at temperature
After being stretched to former 4 times of length under part, composite fibre is obtained；Composite fibre is mixed with dimethylbenzene 1:4 in mass ratio, under room temperature
After impregnating 1h, filtering obtains pretreatment composite fibre, will pretreatment composite fibre with after ethanol washing 6 times, obtain porous fibre；It will
Porous fibre is mixed with the saturated solution of calcium bicarbonate 1:8 in mass ratio, and by the saturated solution of porous fibre and calcium bicarbonate
Mixture be cooled to 16 DEG C after, filtering, obtain modified porous fiber；According to parts by weight, it successively weighs: 80 parts of polyvinyl alcohol,
65 parts of gelatin, 320 parts of water, the hydrochloric acid that the glutaraldehyde water solution and 10 parts of mass fractions that 35 parts of mass fractions are 25% are 30%,
Polyvinyl alcohol is mixed with water, is 90 DEG C in temperature, after revolving speed stirs 50min under conditions of being 220r/min, obtains polyvinyl alcohol
Poly-vinyl alcohol solution is cooled to 50 DEG C, and the poly-vinyl alcohol solution after cooling is mixed with gelatin by solution, and successively to poly- second
Hydrochloric acid and glutaraldehyde water solution are added in the mixture of enolate solution and gelatin, is 30 DEG C in temperature, revolving speed is 250r/min's
Under the conditions of be stirred 10h after, filtering obtains pretreatment gel, will pre-process gel stripping and slicing, and be washed with deionized 5 days, together
When every 10h change a deionized water, by the gel piece after washing after being dried in vacuo 4h under room temperature, obtain gel；It will coagulate
Glue is mixed with water 1:5 in mass ratio, and the carbomer of 0.1 times of gel quality is added into the mixture of gel and water, in temperature
It is 40 DEG C, after revolving speed is stirred 15min under conditions of being 240r/min, obtains processing agent composition, is 10% with mass-dispersion
Sodium hydroxide solution adjust processing agent composition pH to 7.0 after, filtering, obtain carbomer gel mixture, carbomer coagulated
Under conditions of glue mixture is 60 DEG C in temperature after dry 25min, pretreatment gel is obtained；It will pretreatment gel and graphene oxide
Mixture 1:4 in mass ratio mixing, after impregnating 50min under room temperature, filtering obtains filter cake, filter cake is mixed with chitosan
Liquid 1:4 in mass ratio mixing, after impregnating 30min under room temperature, filtering obtains modified gel；According to parts by weight, successively claim
Take 85 parts of portland cements, 35 parts of sand, 55 parts of water, 3 parts of water-reducing agents, 17 parts of modified porous fibers, 10 parts of modified gels and 9 parts add
Add agent, portland cement and water be mixed in blender, and sand is added into blender, modified porous fiber, modified gel,
Water-reducing agent and additive are 55 DEG C in temperature, after revolving speed is stirred 40min under conditions of being 250r/min, blank are obtained, by base
Expect after hardening 6h in mold, steam press maintenance obtains foam concrete.The preparation method of the calcium bicarbonate saturated solution is by water
60 DEG C are heated to, and calcium bicarbonate is added, until there is Precipitation, filters, obtains calcium bicarbonate saturated solution.The diameter of the sand
For 30 mesh.The water-reducing agent is sodium lignin sulfonate.
Embodiment 3
(N- amidino groups) dodecylacrylamide and polyethylene glycol-p-methyl benzenesulfonic acid ester 1.5:1 in mass ratio are mixed in
In flask, and polyethylene glycol -0.15 times of p-methyl benzenesulfonic acid ester quality paracide and polyethylene glycol-is added to first into flask
The ferrocene that 0.1 times of benzene sulfonate quality, in temperature be 60 DEG C, revolving speed be 240r/min under conditions of be stirred 1.5h after,
Obtain additive；Graphene oxide is mixed with water 1:360 in mass ratio, and is in power by the mixture of graphene oxide and water
Under conditions of 200W after sonic oscillation 25min, graphene oxide mixture must be pre-processed, the hydroxide for being 9% with mass fraction
Sodium solution adjusts pretreatment graphene oxide mixture pH to 7.5, obtains graphene oxide mixture；Chitosan and water are pressed into quality
It is mixed than 1:140, is 52 DEG C in temperature, under conditions of revolving speed is 240r/min, after being stirred 48min, obtains chitosan mixing
Object obtains chitosan mixed liquor after adjusting chitosan compound pH to 3.4 with the acetic acid that mass fraction is 37%；It will be poly- to benzene two
Under conditions of formic acid butanediol ester is 102 DEG C in temperature after forced air drying 8h, dry polybutylene terephthalate (PBT) is obtained, will be done
Dry polybutylene terephthalate (PBT) is mixed with polypropylene 4.5:1 in mass ratio, and to dry polybutylene terephthalate (PBT)
With 0.35 times of polybutylene terephthalate (PBT) quality of polyacrylic acid zinc is added in polyacrylic mixture, through melt blending,
After mixing squeezes out, mixing as-spun fibre is obtained, spinning under conditions of being 242 DEG C in temperature by mixing as-spun fibre is then at temperature
After being stretched to former 5 times of length under conditions of 42 DEG C, composite fibre is obtained；Composite fibre is mixed with dimethylbenzene 1:5 in mass ratio, in room
After impregnating 1.5h under the conditions of temperature, filtering obtains pretreatment composite fibre, will pretreatment composite fibre with after ethanol washing 8 times, much
Hole fiber；Porous fibre is mixed with the saturated solution of calcium bicarbonate 1:9 in mass ratio, and by porous fibre and calcium bicarbonate
After the mixture of saturated solution is cooled to 18 DEG C, filtering obtains modified porous fiber；According to parts by weight, successively weigh: 95 parts poly-
Vinyl alcohol, 72 parts of gelatin, 370 parts of water, the glutaraldehyde water solution and 15 parts of mass fractions that 42 parts of mass fractions are 26% are 33%
Hydrochloric acid, polyvinyl alcohol is mixed with water, in temperature be 93 DEG C, revolving speed be 260r/min under conditions of stir 65min after, obtain poly-
Poly-vinyl alcohol solution is cooled to 57 DEG C, and the poly-vinyl alcohol solution after cooling is mixed with gelatin, and successively by glycohol solution
To hydrochloric acid and glutaraldehyde water solution are added in the mixture of poly-vinyl alcohol solution and gelatin, in temperature be 34 DEG C, revolving speed 265r/
After being stirred 10.5h under conditions of min, filtering obtains pretreatment gel, will pre-process gel stripping and slicing, and be washed with deionized water
It washs 5.5 days, while changing a deionized water every 10.5h, by the gel piece after washing in being dried in vacuo 4.5h under room temperature
Afterwards, gel is obtained；Gel is mixed with water 1:7 in mass ratio, and 0.15 times of gel quality is added into the mixture of gel and water
Carbomer, in temperature be 45 DEG C, revolving speed be 270r/min under conditions of be stirred 25min after, obtain processing agent composition, use
After the sodium hydroxide solution that mass-dispersion is 11% adjusts the pH to 7.1 of processing agent composition, filtering obtains carbomer gel mixing
Object obtains pretreatment gel under conditions of being 62 DEG C in temperature by carbomer gel mixture after dry 37min；Pretreatment is solidifying
Glue is mixed with graphene oxide mixture 1:5 in mass ratio, and after impregnating 65min under room temperature, filtering obtains filter cake, will filter
Cake is mixed with chitosan mixed liquor 1:4.5 in mass ratio, and after impregnating 35min under room temperature, filtering obtains modified gel；It presses
Parts by weight meter, successively weighs 93 parts of portland cements, 37 parts of sand, 60 parts of water, 5 parts of water-reducing agents, 21 parts of modified porous fibers, and 14
Portland cement and water are mixed in blender, and sand are added into blender by part modified gel and 12 parts of additives, modified
Porous fibre, modified gel, water-reducing agent and additive are 57 DEG C in temperature, and revolving speed is stirred under conditions of being 265r/min
After 47min, blank is obtained, after blank is hardened 8h in mold, steam press maintenance obtains foam concrete.The calcium bicarbonate saturation
The preparation method of solution is to heat water to 63 DEG C, and calcium bicarbonate is added, until there is Precipitation, filters, obtains calcium bicarbonate
Saturated solution.The diameter of the sand is 55 mesh.The water-reducing agent is sodium lignin sulfonate.
Comparative example: the foam concrete of Changzhou building materials Co., Ltd production.
1 to 3 gained foam concrete of example and comparative example product are subjected to performance detection, the specific detection method is as follows:
Test specimen is made, having a size of 100mm × 100mm × 100mm, detects compression strength referring to JC/T1062；Thermal coefficient
It is tested using MYDR-PL flat band method conductometer.Specific testing result is as shown in table 1:
Table 1: compression strength and the specific testing result of thermal coefficient
| Detection content | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example |
| Compression strength (MPa) | 1.21 | 1.25 | 1.28 | 0.75 |
| Thermal coefficient (W/mk) | 0.15 | 0.18 | 0.21 | 1.80 |
By 1 testing result of table it is found that present invention gained foam concrete has excellent compressive property and thermal insulation property.
The above is only specific application examples of the invention, are not limited in any way to protection scope of the present invention.
Claims (5)
1. a kind of preparation method of civil engineering foam concrete, which is characterized in that it is specific the preparation method comprises the following steps:
(1) by polybutylene terephthalate (PBT) be 100-105 DEG C in temperature under conditions of after forced air drying 7-9h, must dry and gather
Mutual-phenenyl two acid bromide two alcohol ester, by dry polybutylene terephthalate (PBT) with polypropylene (4-5) in mass ratio: 1 mixes, and adds
The polyacrylic acid zinc for entering 0.3-0.4 times of polybutylene terephthalate (PBT) quality must mix after mixing squeezes out through melt blending
As-spun fibre, spinning under conditions of being 235-250 DEG C in temperature by mixing as-spun fibre, the condition for being 40-45 DEG C then at temperature
Under be stretched to former long 4-6 times after, obtain composite fibre；
(2) by composite fibre and dimethylbenzene 1:(4-6 in mass ratio) it mixes, after impregnating 1-2h under room temperature, filtering is obtained pre-
Composite fibre is handled, after pretreatment composite fibre ethanol washing 6-10 times, obtains porous fibre；By porous fibre and bicarbonate
The saturated solution of calcium 1:(8-10 in mass ratio) mixing, after being cooled to 16-20 DEG C, filtering obtains modified porous fiber；
(3) according to parts by weight, it successively weighs: 80-110 parts of polyvinyl alcohol, 65-80 parts of gelatin, 320-420 parts of water, 35-50 parts
The hydrochloric acid that glutaraldehyde water solution and 10-20 part mass fraction that mass fraction is 25-28% are 30-36%, by polyvinyl alcohol with
Water mixing is 90-95 DEG C in temperature, after revolving speed stirs 50-80min under conditions of being 220-280r/min, it is molten to obtain polyvinyl alcohol
Poly-vinyl alcohol solution is cooled to 50-65 DEG C, and the poly-vinyl alcohol solution after cooling is mixed with gelatin, and sequentially adds by liquid
Hydrochloric acid and glutaraldehyde water solution are 30-38 DEG C in temperature, and revolving speed is stirred 10-11h under conditions of being 250-280r/min
Afterwards, it filters, obtains pretreatment gel, stripping and slicing, and be washed with deionized 5-6 days, while changing a deionized water every 10-11h,
By the gel piece after washing after being dried in vacuo 4-5h under room temperature, gel is obtained；
(4) by gel and water 1:(5-8 in mass ratio) it mixes, and the carbomer of 0.1-0.2 times of gel quality is added, it is in temperature
40-50 DEG C, after revolving speed is stirred 15-35min under conditions of being 240-300r/min, inorganic agent gel mixture is obtained, matter is used
The sodium hydroxide solution that amount is separated into 10-12% adjusts the pH to 7.0-7.2 of inorganic agent gel mixture, and filtering obtains carbomer
Gel mixture must pre-process solidifying under conditions of being 60-65 DEG C in temperature by carbomer gel mixture after dry 25-50min
Glue；
(5) pretreatment gel is mixed with graphene oxide mixture 1:(4-6 in mass ratio), in impregnating 50- under room temperature
After 80min, filtering obtains filter cake, by filter cake and chitosan mixed liquor 1:(4-5 in mass ratio) it mixes, in impregnating under room temperature
After 30-40min, filtering obtains modified gel；
(6) according to parts by weight, 85-100 parts of portland cements, 35-40 parts of 30-80 mesh sand, 55-65 parts of water, 3-7 are successively weighed
Part water-reducing agent, 17-25 parts of modified porous fibers, 10-18 parts of modified gels and 9-15 parts of additives, portland cement and water are mixed
Close, and sand be added, modified porous fiber, modified gel, water-reducing agent and additive, in temperature be 55-60 DEG C, revolving speed 250-
After being stirred 40-55min under conditions of 280r/min, blank is obtained, after blank is hardened 6-10h in mold, steam press maintenance,
Foam concrete is obtained, the water-reducing agent is sodium lignin sulfonate.
2. foam according to claim 1, it is characterised in that: the preparation side of step (2) the calcium bicarbonate saturated solution
Method is to heat water to 60-65 DEG C, and calcium bicarbonate is added, until there is Precipitation, filters, obtains calcium bicarbonate saturated solution.
3. a kind of preparation method of civil engineering foam concrete according to claim 1, it is characterised in that: step
(5) preparation method of the graphene oxide mixture is by graphene oxide and water 1:(320-400 in mass ratio) it mixes, in
Under conditions of power is 120-280W after sonic oscillation 20-30min, graphene oxide mixture must be pre-processed, mass fraction is used
Pretreatment graphene oxide mixture pH to 7-8 is adjusted for the sodium hydroxide solution of 8-10%, obtains graphene oxide mixture.
4. a kind of preparation method of civil engineering foam concrete according to claim 1, it is characterised in that: step
(5) preparation method of the chitosan mixed liquor is by chitosan and water 1:(100-180 in mass ratio) it mixes, be in temperature
45-60 DEG C, under conditions of revolving speed is 200-280r/min, after being stirred 35-60min, chitosan compound is obtained, with quality point
After the acetic acid that number is 36-38% adjusts chitosan compound pH to 3.0-3.8, chitosan mixed liquor is obtained.
5. a kind of preparation method of civil engineering foam concrete according to claim 1, it is characterised in that: step
(6) preparation method of the additive is to press (N- amidino groups) dodecylacrylamide with polyethylene glycol-p-methyl benzenesulfonic acid ester
Mass ratio (2-1): 1 mixing, and polyethylene glycol -0.1-0.2 times of quality of p-methyl benzenesulfonic acid ester paracide and poly- second two is added
Alcohol -0.08-0.12 times of quality of p-methyl benzenesulfonic acid ester ferrocene is 50-70 DEG C in temperature, and revolving speed is the item of 200-280r/min
After being stirred 1-2h under part, additive is obtained.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114347259A (en) * | 2022-01-21 | 2022-04-15 | 泰州中科砼易测智能科技有限公司 | Proportioning design method of foam concrete and preparation method thereof |
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| CN108409249A (en) * | 2018-04-23 | 2018-08-17 | 石磊 | A kind of preparation method of resistance to compression water-permeable brick |
| CN108439903A (en) * | 2018-04-24 | 2018-08-24 | 常州五荣化工有限公司 | A kind of Anti-pressure conducting concrete |
| CN108484033A (en) * | 2018-04-02 | 2018-09-04 | 吴伟华 | A kind of preparation method of water-resistant type quartz tailings brick |
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| CN105133070A (en) * | 2015-09-17 | 2015-12-09 | 北京服装学院 | Preparation method of PBT (polybutylene terephthalate) porous fiber |
| CN107721281A (en) * | 2017-11-23 | 2018-02-23 | 广西丰达三维科技有限公司 | A kind of concrete |
| CN108484033A (en) * | 2018-04-02 | 2018-09-04 | 吴伟华 | A kind of preparation method of water-resistant type quartz tailings brick |
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| CN114347259B (en) * | 2022-01-21 | 2024-03-15 | 泰州中科砼易测智能科技有限公司 | Proportioning design method of foam concrete and preparation method thereof |
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