CN110105019A - The method for preparing high-strength foam concrete using waste paper-making pulp, slurry - Google Patents
The method for preparing high-strength foam concrete using waste paper-making pulp, slurry Download PDFInfo
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- CN110105019A CN110105019A CN201910442103.6A CN201910442103A CN110105019A CN 110105019 A CN110105019 A CN 110105019A CN 201910442103 A CN201910442103 A CN 201910442103A CN 110105019 A CN110105019 A CN 110105019A
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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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
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of method for preparing high-strength foam concrete using waste paper-making pulp, slurry, it is related to building material technical field, it is stirred the following steps are included: butt bonding component is put into blender together with 0.45-0.7 times of its quality of water, stir 120-300s, foam concrete slurry is obtained, butt bonding component is the mixture that the mixture or ordinary portland cement, flyash, slag micropowder, light haydite and electric furnace sack dust of ordinary portland cement, flyash, slag micropowder and light haydite composition form；The foaming agent that 1.2-1.4 times of its volume is added into obtained foam concrete slurry continues that paper mill sludge is added after stirring 30-90s, enter mould, molding, natural curing 28d after stirring 30-60s, obtain high-strength foam concrete, this method can not only overcome the problems, such as that the intensity of conventional foam concrete is low, easy to crack, also helping environmental protection and resource circulation utilization, the high-strength foam concrete of preparation has the characteristics that compression strength and High anti bending strength.
Description
Technical field
The present invention relates to building material technical fields, and in particular to prepares high-strength foam concrete using waste paper-making pulp, slurry
Method.
Background technique
Foam concrete refers to cement-based gelling material, admixture etc. for major gelled material, and additive and water is added
Slurry, foamed dose of foaming, lightweight concrete made of moulding by casting, maintenance is made.Compared with ordinary mortar, foam concrete
Inside is dispersed with a large amount of sealed porosity, thus has the spies such as small bulk density, heat-insulated, heat preservation, sound insulation, antidetonation, fire resisting, energy conservation
Point is widely used in the construction of roofing, heat distribution pipeline, floor heating, non-load bearing wall, soundproof plate etc., to China's building energy conservation
There is important progradation with materials for wall reform.Compared with normal concrete, foam concrete porosity with higher makes
It obtains foam concrete and shows many properties, such as light weight, density are small, heat-insulation and heat-preservation, pumpability are good.
However, for a long time, foam concrete there is in hydration process the heat of hydration and water requirement it is higher, drying shrinkage compared with
Greatly, concrete cracking is easily led to.Simultaneously as its dry density is smaller, foam concrete intensity and toughness are lower.Therefore, how
It improves foam concrete intensity and toughness is the key problem in technology for solving current foam concrete and its product.
Paper mill sludge is the bulk solid waste generated in pulping and papermaking processes, moisture content height, complicated component, processing
Difficulty is big.According to statistics, 1 ton of paper of every production, will generate the sludge about 700kg of moisture content 65% or so.Currently, papermaking enterprise is more
The modes such as simple landfill, air storage or burning are taken to be handled, all there is environmental pollutions to some extent for these methods
Seriously, the drawbacks such as resource utilization is low, bring very big obstruction to industry development and social progress.According to statistics, pulp and paper industry
The Treatment of Sludge expense of waste water treatment plant accounts for about 50% or more of water treatment facilities operating cost.Therefore, how scientificlly and effectively
Pollution of the paper mill sludge to environment is solved, the minimizing of sludge, innoxious and recycling is realized, is papermaking enterprise and efforts at environmental protection
The hot spot and focus of person's concern.
Paper mill sludge is mainly made of inorganic matter and organic matter, but because of difference such as pulping and paper-making fibrous raw material, production technologies,
Keep the content difference of its paper mill sludge chemical component larger, and wherein crude fiber content, content of ashes largely determine
The resource utilization direction of paper mill sludge and value.In bamboo pulp secondary sludge chemical component mainly include fiber, it is wooden
Element and ash content etc., content is respectively 28.37%, 27.07% and 37.39%, in relation to wood pulp and grass in documents report
Starch the chemical composition content of paper mill sludge, it is found that the content of its ash content is slightly lower, and coarse-fibred content will be lower than papermaking straw pulp
Preliminary sludge.
The pH value of sludge is 6.8, and moisture content 70.78% is presented near neutral, shows that it can be used for improveing acid soil
Earth makes soil be adjusted to the acid or alkali environment of suitable plant or plant growth.Meanwhile lower crude fiber content and higher ash content
Content then shows the preparation that such paper mill sludge is not appropriate for artificial board, but it is mixed to can be used as polymer matrix composites and foam
Filler in solidifying soil.This paper mill sludge can play the role of activeness and quietness in foam concrete.
Patent CN201810296720.5 discloses a kind of large dosage paper mill sludge air-entrained concrete building block and its preparation side
Method, the air-entrained concrete building block include following raw material: paper mill sludge, quick lime, PO42.5 cement, aluminium powder, silicon ash, gypsum, chlorine
Change sodium, sodium nitrite, sodium sulphate, calcium chloride, urea, methacrylic acid, silane coupling agent, calcium gluconate, triisopropanolamine,
Fatty glyceride, hydroxypropyl methyl cellulose, calcium stearate, Z5 concrete hardener, polycarboxylic acids, and potassium permanganate.This
Using paper mill sludge as primary raw material, the air-entrained concrete building block of production has that intensity height, good toughness, material are light, keep the temperature for invention
Effect is good, water absorption rate is low, corrosion resistance is good, good waterproof performance, surface hardness are high, freeze thawing resistance effect is good, production cost is low, can be harmless
The advantages that changing processing paper mill sludge.
Patent CN200810159967.9 discloses one kind, and by trade waste, (paper mill sludge, clinker, gives up at different steel slags
Abandon concrete) it is primary raw material, using accelerated carbonation technology, the method for preparing construction material.This method is 1 by weight:
0.5-4 mixes paper mill sludge with char-forming material, adds water, is uniformly mixed, is pressed into construction material semi-finished product, semi-finished product are accelerating
Under carbonized maintaining, construction material finished product is made.The technology efficiently utilizes the trade wastes such as paper mill sludge, reduces dioxy
The discharge for changing carbon greenhouse gases, is prepared for the construction material of function admirable, good appearance.Beneficial achievement of the invention be benefit it is useless,
It is environmentally friendly, energy saving, at low cost.
From in terms of the result that the prior art is retrieved: key of the invention is using the fiber in paper mill sludge, in foam coagulation
Play the role of activeness and quietness in soil, in the prior art, does not prepare high-strength foam concrete using paper mill sludge with the present invention
The identical technique of method content and formula are reported.
Paper mill sludge, which is incorporated into foam concrete, enhances foam concrete early strength and later period toughness, can be to avoid
The reluctant drawback of paper mill sludge fundamentally prevents paper mill sludge burning to improve the added value that paper mill sludge utilizes
Bring secondary pollution.Therefore, preparing high-strength foam concrete using paper mill sludge has the toughening enhancing of foam concrete
Highly important meaning.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, high-strength foam concrete is prepared using waste paper-making pulp, slurry the present invention provides a kind of
Method, can not only overcome the problems, such as that the intensity of conventional foam concrete is low, easy to crack, also help environmental protection and resources circulation
It utilizes.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
1) butt bonding component is put into blender together with 0.45-0.7 times of its quality of water and is stirred, stir 120-
300s, obtains foam concrete slurry, and butt bonding component is ordinary portland cement, flyash, slag micropowder and Lightweight ceramic
The mixing of the mixture or ordinary portland cement, flyash, slag micropowder, light haydite and electric furnace sack dust composition of sand composition
Object；
2) foaming agent that 1.2-1.4 times of its volume is added into the foam concrete slurry that step 1) obtains continues to stir
Paper mill sludge is added after 30-90s, enters mould, molding, natural curing 28d after stirring 30-60s, obtains high-strength foam concrete.
Further, in step 1), the mixing of ordinary portland cement, flyash, slag micropowder and light haydite composition
In object, the mass fraction of each component are as follows: 25-55 parts of ordinary portland cement, 5-15 parts of flyash, 30-50 parts of slag micropowder, light
5-15 parts of matter pottery sand.
Further, in step 1), ordinary portland cement, flyash, slag micropowder, light haydite and electric furnace sack dust
In the mixture of composition, the mass fraction of each component are as follows: 25-50 parts of ordinary portland cement, 5-15 parts of flyash, slag micropowder
30-45 parts, 5-15 parts of light haydite, 5-15 parts of electric furnace sack dust.
Further, ordinary portland cement is the ordinary portland cement marked as 32.5 or 42.5；Flyash is combustion
The ash of level-one caused by coal-fired plant；Slag micropowder is granulated blast-furnace slag resulting powder, specific surface area after dry grinding
For 450-850m2/kg；Light haydite is baking-free lightweight pottery sand, and partial size is less than 2.36mm, and bulk density is less than 1100kg/m3,
Cylindrical compress strength is not less than 25MPa.
Further, foaming agent is animal protein foaming agent, rosin foaming agent, vegetable protein foaming agent and composite foamed
One of agent is a variety of, and paper mill sludge is obtained by papermaking enterprise black paper pulp convection drying, every cubic metre of foam concrete slurry
Paper mill sludge volume is 30kg-180kg in body.
Further, electric furnace sack dust is the dedusting ash that electric furnace steel making process generates, its main chemical compositions are
TFe30.01-41.32%, Fe2O341.12-56.24%, ZnO3.20-19.03%, CaO4.32-6.12%, MgO1.23-
5.47%, SiO22.89-5.14%, MnO1.87-3.12%, PbO0.224-0.451%, SO30.89-1.89%, average particle size
≤0.075mm。
Further, before step 1) stirring, first blender is pre-wetted, and is guaranteed in blender without bright water.
(3) beneficial effect
The present invention provides a kind of methods for preparing high-strength foam concrete using waste paper-making pulp, slurry, and for preparing is high-strength
Foam concrete has the characteristics that early strength is high, later strength growth is obvious, long-term strength is stablized；Paper mill sludge is mixed to foam
Solidifying soil has toughening humidification, is very suitable to the construction of the mass concretes such as mine filling, also can be applied to new wall material
Production.
Ordinary portland cement generates density lower concrete under the action of foaming agent, and flyash rises as admixture
To the effect of hydrated cementitious initial stage filling pore, slag micropowder is since particle is thin, and large specific surface area is at hydrated cementitious initial stage to water
Mud foam concrete plays humidification；And light haydite plays skeleton function in foam concrete system, has consolidated foam coagulation
The intensity of soil, so that not generating the foam concrete later period the harm such as collapses；And the fiber in paper mill sludge is in foam concrete
In play the role of activeness and quietness, meanwhile, the thin mud in paper mill sludge plays the role of filler, has both increased the strong of foam concrete
Degree, and prevent the cracking of foam concrete.Even more important, the ultra-fine electric furnace sack dust of partial size is in entire foam concrete system
In play the role of initial stage enhancing.Therefore, various materials jointly promote bubble from many aspects such as microtexture, hydration reactions
The intensity of foam concrete is formed so that the foam concrete intensity mixed with paper mill sludge is bigger, toughness is stronger, crack resistence performance more
It is good.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Slag powders used in the present invention take vertical mill system grinding from Ma'anshan Iron and Steel Corp's granulated blast-furnace slag, main
Chemical component are as follows: SiO232.8%, Al2O317.54%, Fe2O30.20%, CaO37.87%, MgO9.65%, SO31.00%,
F-CaO1.38%, specific surface area 450-850m2/kg。
Flyash used is the ash of level-one caused by the green hill coal-burning power plant of state's electricity Wuhan, and after grinding, specific surface area is
330m2/kg。
Electric furnace sack dust used is the dedusting ash that electric furnace steel making process generates, its main chemical compositions are TFe30.01-
41.32%, Fe2O341.12-56.24%, ZnO3.20-19.03%, CaO4.32-6.12%, MgO1.23-5.47%,
SiO22.89-5.14%, MnO1.87-3.12%, PbO0.224-0.451%, SO30.89-1.89%, average particle size≤
0.075mm。
Light haydite used is baking-free lightweight pottery sand, and partial size is less than 2.36mm, and bulk density is less than 1100kg/m3, cylinder
Compressive Strength is not less than 25MPa.
Embodiment 1:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
32.5 ordinary portland cements, flyash, slag micropowder, light haydite are matched according to following mass fraction:
It is pre-wetted to blender agitator, guarantees that 32.5 ordinary silicons are added into blender without bright water in blender
Four kinds of raw material such as acid salt cement, flyash, slag micropowder and light haydite are added 55 parts of tap water, start blender, stir
300s is mixed, foam concrete slurry is obtained；1.2 times of foam concrete slurry volume are added into above-mentioned foam concrete slurry
Animal protein foaming agent continue stir 30s, according still further to paper mill sludge volume in every cubic metre of foam concrete slurry be 30kg
Ratio paper mill sludge is added, be stirred for obtaining foam concrete block after entering mould, molding, natural curing 28d after 30s.
Above-mentioned foam concrete block is tested for the property, dry density 820kg/m3, surface is flawless, and anti-folding is strong
Degree is 6.5MPa, compression strength 21.1MPa.Thus it is anti-to illustrate that the high-strength foam concrete of the preparation of the embodiment of the present invention 1 has
The characteristics of Compressive Strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-cracking resistance of cellular concrete product is good, can
To be applied to the production of new wall material.
Embodiment 2:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
42.5 ordinary portland cements, flyash, slag micropowder, light haydite are matched according to following mass fraction:
It is pre-wetted to blender agitator, guarantees that 42.5 ordinary silicons are added into blender without bright water in blender
Four kinds of raw material such as acid salt cement, flyash, slag micropowder and light haydite are added 52.5 parts of tap water, start blender,
280s is stirred, foam concrete slurry is obtained；The 1.4 of foam concrete slurry volume is added into above-mentioned foam concrete slurry
Rosin foaming agent again continues to stir 90s, is 60kg's according still further to paper mill sludge volume in every cubic metre of foam concrete slurry
Paper mill sludge is added in ratio, is stirred for obtaining foam concrete after entering mould, molding, natural curing 28d after 90s.
Above-mentioned foam concrete block is tested for the property, dry density 680kg/m3, surface is flawless, and anti-folding is strong
Degree is 2.1MPa, compression strength 6.5MPa.Thus illustrate the present invention
The high-strength foam concrete that embodiment 2 is prepared has the characteristics that compression strength and High anti bending strength.Due to papermaking dirt
The toughening effect of mud, the anti-cracking resistance of cellular concrete product is good, can be applied to the ground backfill construction of large volume.
Embodiment 3:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
42.5 ordinary portland cements, flyash, slag micropowder, light haydite are matched according to following mass fraction:
It is pre-wetted to blender agitator, guarantees that 42.5 ordinary silicons are added into blender without bright water in blender
Four kinds of raw material such as acid salt cement, flyash, slag micropowder and light haydite are added 57.5 parts of tap water, start blender,
120s is stirred, foam concrete slurry is obtained；The 1.3 of foam concrete slurry volume is added into above-mentioned foam concrete slurry
Vegetable protein foaming agent again continues to stir 90s, is according still further to paper mill sludge volume in every cubic metre of foam concrete slurry
Paper mill sludge is added in the ratio of 90kg, is stirred for obtaining foam concrete after entering mould, molding, natural curing 28d after 60s.
Above-mentioned foam concrete block is tested for the property, dry density 750kg/m3, surface is flawless, and anti-folding is strong
Degree is 3.7MPa, compression strength 14.5MPa.Thus it is anti-to illustrate that the high-strength foam concrete of the preparation of the embodiment of the present invention 3 has
The characteristics of Compressive Strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-cracking resistance of cellular concrete product is good, can
To be applied to building backfill construction.
Embodiment 4:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
42.5 ordinary portland cements, flyash, slag micropowder, light haydite are matched according to following mass fraction:
It is pre-wetted to blender agitator, guarantees that 42.5 ordinary silicons are added into blender without bright water in blender
Four kinds of raw material such as acid salt cement, flyash, slag micropowder and light haydite are added 54 parts of tap water, start blender, stir
240s is mixed, foam concrete slurry is obtained；1.4 times of foam concrete slurry volume are added into above-mentioned foam concrete slurry
Composite foamable agent continue stir 60s, according still further to paper mill sludge volume in every cubic metre of foam concrete slurry be 120kg ratio
Paper mill sludge is added in example, is stirred for obtaining foam concrete block after entering mould, molding, natural curing 28d after 45s.
Above-mentioned foam concrete block is tested for the property, dry density 950kg/m3, surface is flawless, and anti-folding is strong
Degree is 8.7MPa, compression strength 25.6MPa.Thus it is anti-to illustrate that the high-strength foam concrete of the preparation of the embodiment of the present invention 4 has
The characteristics of Compressive Strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-cracking resistance of cellular concrete product is good, can
To be applied to the production of new wall material.
Embodiment 5:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
By 32.5 ordinary portland cements, flyash, slag micropowder, light haydite, electric furnace sack dust according to following quality
Number proportion:
It is pre-wetted to blender agitator, guarantees that 32.5 ordinary silicons are added into blender without bright water in blender
66.5 parts of tap water is added in five kinds of raw material such as acid salt cement, flyash, slag micropowder, light haydite and electric furnace sack dust,
Blender is started, 180s is stirred, obtains foam concrete slurry；Foam concrete slurry is added into above-mentioned foam concrete slurry
1.3 times of composite foamable agent of body volume continues to stir 90s, mixes according still further to paper mill sludge in every cubic metre of foam concrete slurry
Paper mill sludge is added in the ratio that amount is 150kg, is stirred for obtaining foam concrete after entering mould, molding, natural curing 28d after 90s
Building block.
Above-mentioned foam concrete block is tested for the property, dry density 1150kg/m3, surface is flawless, anti-folding
Intensity is 7.8MPa, compression strength 26.1MPa.Thus the high-strength foam concrete for illustrating that the embodiment of the present invention 5 is prepared has
The characteristics of compression strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-cracking resistance of cellular concrete product is good,
It can be applied to the production of new wall material.
Embodiment 6:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
By 32.5 ordinary portland cements, flyash, slag micropowder, light haydite, electric furnace sack dust according to following quality
Number proportion:
It is pre-wetted to blender agitator, guarantees that 32.5 ordinary silicons are added into blender without bright water in blender
Five kinds of raw material such as acid salt cement, flyash, slag micropowder, light haydite and electric furnace sack dust are added 69 parts of tap water, open
Dynamic blender, stirs 150s, obtains foam concrete slurry；Foam concrete slurry is added into above-mentioned foam concrete slurry
1.2 times of animal protein foaming agent of volume continues to stir 60s, according still further to paper mill sludge in every cubic metre of foam concrete slurry
Paper mill sludge is added in the ratio that volume is 180kg, is stirred for obtaining foam coagulation after entering mould, molding, natural curing 28d after 60s
Earth building blocks.
Above-mentioned foam concrete block is tested for the property, dry density 1350kg/m3, surface is flawless, anti-folding
Intensity is 9.3MPa, compression strength 45.1MPa.Thus the high-strength foam concrete for illustrating that the embodiment of the present invention 6 is prepared has
The characteristics of compression strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-cracking resistance of cellular concrete product is good,
It can be applied to the production of new wall material.
Embodiment 7:
A method of high-strength foam concrete is prepared using waste paper-making pulp, slurry, comprising the following steps:
By 32.5 ordinary portland cements, flyash, slag micropowder, light haydite, electric furnace sack dust according to following quality
Number proportion:
It is pre-wetted to blender agitator, guarantees that 32.5 ordinary silicons are added into blender without bright water in blender
Five kinds of raw material such as acid salt cement, flyash, slag micropowder, light haydite and electric furnace sack dust are added 63.25 parts originally
Water starts blender, stirs 300s, obtains foam concrete slurry；Foam coagulation is added into above-mentioned foam concrete slurry
1.2 times of animal protein foaming agent of native slurry volume continues to stir 30s, according still further to making in every cubic metre of foam concrete slurry
Paper mill sludge is added in the ratio that paper sludge volume is 180kg, is stirred for being steeped after entering mould, molding, natural curing 28d after 60s
Foam concrete building block.
Above-mentioned foam concrete block is tested for the property, dry density 1013kg/m3, surface is flawless, anti-folding
Intensity is 8.1MPa, compression strength 23.2MPa.Thus the high-strength foam concrete for illustrating that the embodiment of the present invention 7 is prepared has
The characteristics of compression strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-cracking resistance of cellular concrete product is good,
It can be applied to the production of new wall material.
To sum up, the embodiment of the present invention has the following beneficial effects: the high-strength foam concrete of 1-7 of embodiment of the present invention preparation
Has the characteristics that compression strength and High anti bending strength.Due to the toughening effect of paper mill sludge, the anti-crack resistance of cellular concrete product
Can be good, it can be applied to the production of new wall material.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of method for preparing high-strength foam concrete using waste paper-making pulp, slurry, which comprises the following steps:
1) butt bonding component is put into blender together with 0.45-0.7 times of its quality of water and is stirred, stir 120-300s,
Foam concrete slurry is obtained, the butt bonding component is ordinary portland cement, flyash, slag micropowder and light haydite
The mixing of the mixture or ordinary portland cement, flyash, slag micropowder, light haydite and electric furnace sack dust composition of composition
Object；
2) foaming agent that 1.2-1.4 times of its volume is added into the foam concrete slurry that step 1) obtains continues to stir 30-90s
After be added paper mill sludge, enter mould, molding, natural curing 28d after stirring 30-60s, obtain high-strength foam concrete.
2. the method for preparing high-strength foam concrete using waste paper-making pulp, slurry as described in claim 1, which is characterized in that step
It is rapid 1) in, the ordinary portland cement, flyash, slag micropowder and light haydite composition mixture in, the matter of each component
Measure number are as follows: 25-55 parts of ordinary portland cement, 5-15 parts of flyash, 30-50 parts of slag micropowder, 5-15 parts of light haydite.
3. the method for preparing high-strength foam concrete using waste paper-making pulp, slurry as described in claim 1, which is characterized in that step
It is rapid 1) in, the ordinary portland cement, flyash, slag micropowder, light haydite and electric furnace sack dust composition mixture in,
The mass fraction of each component are as follows: 25-50 parts of ordinary portland cement, 5-15 parts of flyash, 30-45 parts of slag micropowder, Lightweight ceramic
5-15 parts of sand, 5-15 parts of electric furnace sack dust.
4. the method as described in any one of claims 1-3 for preparing high-strength foam concrete using waste paper-making pulp, slurry, special
Sign is that the ordinary portland cement is the ordinary portland cement marked as 32.5 or 42.5；The flyash is fire coal
The ash of level-one caused by power plant；The slag micropowder is granulated blast-furnace slag resulting powder, specific surface after dry grinding
Product is 450-850m2/kg；The light haydite is baking-free lightweight pottery sand, and partial size is less than 2.36mm, and bulk density is less than
1100kg/m3, cylindrical compress strength is not less than 25MPa.
5. the method as described in any one of claims 1-3 for preparing high-strength foam concrete using waste paper-making pulp, slurry, special
Sign is that the foaming agent is in animal protein foaming agent, rosin foaming agent, vegetable protein foaming agent and compound foaming agent
One or more, the paper mill sludge is obtained, every cubic metre of foam concrete slurry by papermaking enterprise black paper pulp convection drying
Middle paper mill sludge volume is 30kg-180kg.
6. the method as claimed in claim 1 or 3 for preparing high-strength foam concrete using waste paper-making pulp, slurry, feature exist
In the electric furnace sack dust is the dedusting ash that electric furnace steel making process generates, its main chemical compositions are TFe 30.01-
41.32%, Fe2O341.12-56.24%, ZnO 3.20-19.03%, CaO 4.32-6.12%, MgO 1.23-5.47%,
SiO22.89-5.14%, MnO 1.87-3.12%, PbO 0.224-0.451%, SO30.89-1.89%, average particle size≤
0.075mm。
7. the method for preparing high-strength foam concrete using waste paper-making pulp, slurry as described in claim 1, which is characterized in that
Before step 1) stirring, first blender is pre-wetted, and is guaranteed in blender without bright water.
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