CN107840591A - A kind of novel cement concrete and its application in construction wall - Google Patents
A kind of novel cement concrete and its application in construction wall Download PDFInfo
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- CN107840591A CN107840591A CN201711247264.7A CN201711247264A CN107840591A CN 107840591 A CN107840591 A CN 107840591A CN 201711247264 A CN201711247264 A CN 201711247264A CN 107840591 A CN107840591 A CN 107840591A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to building material field, the more specifically present invention provides a kind of novel cement concrete and its application.One side of the invention provides novel cement concrete, in parts by weight, including at least following components：80~100 parts of cement；0.1~5 part of early strength agent；0.1~1 part of water reducer；0.01~3 part of thickener；5~20 parts of filler；50~80 parts of water.The second aspect of the invention provides application of the novel cement concrete in construction wall.
Description
Technical field
The present invention relates to building material field, the more specifically present invention provides a kind of novel cement concrete and its built
Application in wall.
Background technology
With energy saving building and the development of wall thermal insulation technology, the energy development strategy of " energy conservation priority " is implemented, to energy-conservation
Technology proposes higher requirement.Preliminarily form at present based on concrete segment, supplemented by non-clay brick and building board
Walling general layout, and obtain significant society, economy and environmental benefit.
In current construction industry, the light insulating wall board of non-bearing is in great demand, the dividing wall that tradition uses
Body material, is clay brick, hollow brick, foam concrete block, clinker brick and expanded perlite brick etc. mostly, such wall seam
More, some need to consume clay, and weight weight, though some relative lightweights, need mortar cement plaster, man-hour of constructing is more.
Concrete is the maximum construction material of dosage in the world at present, cheap, bearing capacity is strong, durability height is it
Major advantage.But because silicate cement hydration course of reaction is slow and the influence of environment temperature, the intensity hair of concrete
Postpone slowly, generally require more than the 24 hours intensity that can be only achieved form removal, intensity can only achieve the 40- of design strength within 3 days
50%, it can be only achieved design strength within more than 28 days.Meanwhile as the development of concrete technology, trade waste conduct are substantially former
Application of the material in mixed soil is more and more extensive, in order to reduce early hydration heat in the production of Large Precast Members, improves mixed
Native durability is coagulated, largely using mineral admixtures such as miberal powder, flyash, therefore, the early strength development of concrete is more slow
Slowly, the technique progress such as mould turnover and prestressing force loading is influenceed.
In order to improve early age strength of concrete, accelerate mould turnover, production efficiency is improved, typically using following method.
(1) early strength agent is added：Chloride salt early strength agent is the inorganic salts early strength agent applied earliest, and the early stage that can improve concrete is strong
Degree, but the later strength of concrete is had a strong impact on, and because it contains Cl-, easily cause steel bar corrosion, and should by limitation
With.Sulfates early strength agent easily causes later stage degradation, and concrete surface easily separates out " bloom ", influences outward appearance.(2) reduce
Water-cement ratio：Improve cement consumption or the method using superfine cement：The problem of this method is brought is that the self-constriction of concrete is big
Width increase, cracking risk increase, make production operation difficult, and additive usage increase is notable, and production cost is significantly increased.
(3) high temperature steam curing is used：Under the conditions of high temperature steam curing, the crystalline size of hydrated cementitious is thick, fragility increase, durable
Property decline.
Hence it is highly desirable to pass through technological improvement, there is provided a kind of novel cement concrete, it is applied to construction wall,
Obtain preferable effect.
The content of the invention
In order to solve the above problems, one side of the invention provides novel cement concrete, in parts by weight, at least
Including following components：
As a kind of preferable technical scheme of the present invention, the early strength agent, in parts by weight, including at least following components：
As a kind of preferable technical scheme of the present invention, the water reducer is polycarboxylic acids dehydragent.
As a kind of preferable technical scheme of the present invention, the preparing raw material of the polycarboxylic acids dehydragent, in parts by weight,
Comprise at least
As a kind of preferable technical scheme of the present invention, the preparing raw material of the polycarboxylic acids dehydragent, in parts by weight,
Comprise at least
As a kind of preferable technical scheme of the present invention, the modified coal ash is that vinyltrimethoxy silane is modified powder
Coal ash.
As a kind of preferable technical scheme of the present invention, in the vinyltrimethoxy silane modified coal ash, ethene
Weight ratio between base trimethoxy silane and flyash is (1~3)：10.
As a kind of preferable technical scheme of the present invention, the thickener is in hydroxypropyl methyl fiber ether, polyvinyl alcohol
Any one or a few mixing.
As a kind of preferable technical scheme of the present invention, the filler be in flyash, hydrotalcite any one or it is several
The mixing of kind.
The second aspect of the invention provides application of the novel cement concrete in construction wall.
The above-mentioned of the application and other features, aspect and advantage is more readily understood with reference to described further below.
Embodiment
Participate in the election of the detailed description of the invention below for being preferable to carry out method and including embodiment this hair can be more easily understood
Bright content.Unless otherwise defined, all technologies used herein and scientific terminology have common with art of the present invention
The identical implication that technical staff is generally understood that.When contradiction be present, the definition in this specification is defined.
As used herein term " by ... prepare " it is synonymous with "comprising".Term "comprising" used herein, " comprising ",
" having ", " containing " or its any other deformation, it is intended that cover including for non-exclusionism.For example, the combination comprising listed elements
Thing, step, method, product or device are not necessarily limited to those key elements, but can include not expressly listed other key elements or
Such a composition, step, method, product or the intrinsic key element of device.
Conjunction " Consists of " excludes any key element do not pointed out, step or component.If be used in claim, this
Phrase will make claim be closed, it is not included the material in addition to the material of those descriptions, but relative normal
Except rule impurity.When being rather than immediately following in the clause that phrase " Consists of " appears in claim main body after theme,
It is only limited to the key element described in the clause；Other key elements are not excluded outside the claim as entirety.
Equivalent, concentration or other values or parameter are excellent with scope, preferred scope or a series of upper limit preferred values and lower limit
During the Range Representation that choosing value limits, this, which is appreciated that, specifically discloses by any range limit or preferred value and any scope
All scopes that any pairing of lower limit or preferred value is formed, regardless of whether the scope separately discloses.For example, when open
During scope " 1 to 5 ", described scope should be interpreted as including scope " 1 to 4 ", " 1 to 3 ", " 1 to 2 ", " 1 to 2 and 4 to
5 ", " 1 to 3 and 5 " etc..When number range is described herein, unless otherwise indicated, otherwise the scope is intended to include its end
Value and all integers and fraction within the range.
Singulative includes plural number and object is discussed, unless the context clearly dictates otherwise." optional " or it is " any
It is a kind of " refer to that the item that describes thereafter or event may or may not occur, and the description include situation that event occurs and
The situation that event does not occur.
Approximate term in specification and claims is used for modifying quantity, and it is specific to represent that the present invention is not limited to this
Quantity, include the part of the amendment of the acceptable change without cause related basic function close to the quantity.Phase
Answer, modify a numerical value with " about ", " about " etc., mean that the invention is not restricted to the exact numerical.It is approximate in some examples
Term likely corresponds to the precision of the instrument of measured value.In present specification and claims, scope limits can be with
Combine and/or exchange, these scopes include all subranges contained therebetween if not stated otherwise.
In addition, indefinite article " one kind " before key element of the present invention or component and "one" to key element or the quantitative requirement of component
(i.e. occurrence number) unrestriction.Therefore "one" or " one kind " should be read as including one or at least one, and odd number
The key element or component of form also include plural form, unless the obvious purport of the quantity refers to singulative.
" polymer " means by the polymerizable compound prepared by the monomer that polymerize identical or different type.Generic term
" polymer " includes term " homopolymer ", " copolymer ", " terpolymer " and " EVA "." EVA " means to pass through polymerization
Polymer prepared by least two different monomers.Generic term " EVA " include term " copolymer " (its typically to refer to by
Polymer prepared by two kinds of different monomers) (it is typically referring to what is prepared by three kinds of different monomers with term " terpolymer "
Polymer).It is also included by polymerizeing more kinds of monomers the polymer that manufactures." blend " means that two or more is poly-
Compound mixes the polymer to be formed by physics or chemical method jointly.
In order to solve the above problems, one side of the invention provides novel cement concrete, in parts by weight, at least
Including following components：
In a preferred embodiment, the novel cement concrete, in parts by weight, including at least with the following group
Point：
Cement
In the present invention, described cement is not particularly limited, and can be the cement of any one commercially available trade mark, institute
The cement stated is purchased from Anhui Co., Ltd of conch group.
Early strength agent
In the present invention, described early strength agent refers to that early age strength of concrete can be improved, and to later strength without notable shadow
Loud additive.The main function of early strength agent is acceleration hydrated cementitious speed, promotes the development of early age strength of concrete；Both had
There is early powerful, there is certain water reducing and strength increasing function again.
In a preferred embodiment, the early strength agent, in parts by weight, including at least following components：
The raw material that the early strength agent is related to is commercially available acquisition, wherein, nano-calcium carbonate, which is purchased from Shanghai edge Jiang Huagong, to be had
Limit company；The mesoporous silica nanospheres are purchased from Nanjing Xian Feng Nono-material Science ＆ Technology Ltd., production code member XFF11
7440-21-3。
In a preferred embodiment, the preparation method of the early strength agent is as follows：Weigh the formic acid of corresponding parts by weight
Calcium, calcium acetate, nano-calcium carbonate, mesoporous silica nanospheres and deionized water, after being mixed, temperature is increased to 80
DEG C, then stir mixing, after obtain early strength agent.
Water reducer
In the present invention, described water reducer refers to that one kind under conditions of maintaining concrete slump to be basically unchanged, can subtract
The concrete admixture of few mixing water amount.
In a preferred embodiment, the water reducer is polycarboxylic acids dehydragent.
In a preferred embodiment, the preparing raw material of the polycarboxylic acids dehydragent, in parts by weight, at least wrap
Include：
In a preferred embodiment, the preparing raw material of the polycarboxylic acids dehydragent, in parts by weight, at least wrap
Include
In a preferred embodiment, the preparing raw material of the polycarboxylic acids dehydragent, in parts by weight, at least wrap
Include：
In a preferred embodiment, the modified coal ash is vinyltrimethoxy silane modified coal ash.
In a preferred embodiment, the weight ratio between the vinyltrimethoxy silane and flyash is (1
~3)：10.
In a preferred embodiment, the preparation method of the vinyltrimethoxy silane modified coal ash is at least
Comprise the following steps：
(1) add water into 10g flyash and be uniformly dispersed, wash 3 times and do using absolute ethyl alcohol again after centrifugation
It is dry, the NaOH solution of mass concentration 10% is then added, is flowed back 12 hours at 100 DEG C, reaction uses mass concentration 10% after terminating
Sulfuric acid solution adjust pH value to neutrality, washed 3 times with absolute ethyl alcohol and obtain pretreated flyash after being dried in vacuo；
(2) under the conditions of ice-water bath, the hydrogen peroxide solution that 2mL mass concentrations are 30% is added into 3mL mass concentrations is
In 98% sulfuric acid solution, mix acid liquor is obtained；Then it is molten the pretreated flyash of step (1) to be added slowly to mixing
In liquid, stirring reaction 20min, water washing is carried out again, and obtain hydroxylating flyash after drying under nitrogen protection；
(3) weigh hydroxylating flyash, 2g vinyltrimethoxy silanes and 100mL toluene in 10g steps (2),
0.1g hydroquinones, wherein, reaction system is reacted 15h at 100 DEG C, is cooled to room temperature, centrifuges by hydroquinones as polymerization inhibitor
Separation, the solid that centrifugation obtains is redissolved in toluene, then centrifuges again, 24h is dried under vacuum and obtains second
Alkenyl trimethoxy silane modified coal ash.
In a preferred embodiment, the preparation method of the polycarboxylic acids dehydragent, including at least following steps：
By the maleic anhydride of corresponding parts by weight, methacrylic acid, vinylpyridine, sodium vinyl sulfonate and modified fine coal
Ash is added in three-necked flask, while adds aqueous solvent, is configured to the solution that mass fraction is 30%, is warming up to 90 DEG C to material
All dissolvings；Then temperature is adjusted to after 65 DEG C, adds ammonium persulfate, carried out copolymerization 6h, obtain polycarboxylic acid
Water reducer.
Thickener
In a preferred embodiment, the thickener is any in hydroxypropyl methyl fiber ether, polyvinyl alcohol
It is a kind of.
Filler
In a preferred embodiment, the filler is the mixed of any one or a few in flyash, hydrotalcite
Close.
The preparation method of the novel cement concrete, including at least following steps：
It is stirred after cement and water are mixed, early strength agent, water reducer is then sequentially added in the state of stirring, is filled out
Material, mixed material is stirred, then adds thickener, stirs and can obtain novel cement concrete.
The second aspect of the invention provides application of the novel cement concrete in construction wall.
The present invention is specifically described below by embodiment.It is necessarily pointed out that following examples are only used
In the invention will be further described, it is impossible to be interpreted as limiting the scope of the invention, professional and technical personnel in the field
Some the nonessential modifications and adaptations made according to the content of the invention described above, still fall within protection scope of the present invention.
In addition, if without other explanations, it is raw materials used be all it is commercially available, be purchased from traditional Chinese medicines chemical reagent.
Embodiment 1：
Embodiments of the invention 1 provide a kind of novel cement concrete, in parts by weight, including following components：
The cement is purchased from Anhui Co., Ltd of conch group；
The early strength agent, in parts by weight, including following components：
Nano-calcium carbonate is purchased from Shanghai Yuan Jiang Chemical Co., Ltd.s；The mesoporous silica nanospheres are purchased from Nanjing Xian Feng
Nono-material Science ＆ Technology Ltd., production code member are XFF11 7440-21-3.
The preparation method of the early strength agent is as follows：Weigh the calcium formates of corresponding parts by weight, calcium acetate, nano-calcium carbonate, Jie
Hole silica nanosphere and deionized water, after being mixed, temperature is increased to 80 DEG C, then stir mixing, after
Obtain early strength agent.
The water reducer is polycarboxylic acids dehydragent；
The preparing raw material of the polycarboxylic acids dehydragent, in parts by weight, comprise at least：
The modified coal ash is vinyltrimethoxy silane modified coal ash.
The preparation method of the vinyltrimethoxy silane modified coal ash comprises at least following steps：
(1) add water into 10g flyash and be uniformly dispersed, wash 3 times and do using absolute ethyl alcohol again after centrifugation
It is dry, the NaOH solution of mass concentration 10% is then added, is flowed back 12 hours at 100 DEG C, reaction uses mass concentration 10% after terminating
Sulfuric acid solution adjust pH value to neutrality, washed 3 times with absolute ethyl alcohol and obtain pretreated flyash after being dried in vacuo；
(2) under the conditions of ice-water bath, the hydrogen peroxide solution that 2mL mass concentrations are 30% is added into 3mL mass concentrations is
In 98% sulfuric acid solution, mix acid liquor is obtained；Then it is molten the pretreated flyash of step (1) to be added slowly to mixing
In liquid, stirring reaction 20min, water washing is carried out again, and obtain hydroxylating flyash after drying under nitrogen protection；
(3) weigh hydroxylating flyash, 2g vinyltrimethoxy silanes and 100mL toluene in 10g steps (2),
0.1g hydroquinones, wherein, reaction system is reacted 15h at 100 DEG C, is cooled to room temperature, centrifuges by hydroquinones as polymerization inhibitor
Separation, the solid that centrifugation obtains is redissolved in toluene, then centrifuges again, 24h is dried under vacuum and obtains second
Alkenyl trimethoxy silane modified coal ash.
The preparation method of the polycarboxylic acids dehydragent, including at least following steps：
By the maleic anhydride of corresponding parts by weight, methacrylic acid, vinylpyridine, sodium vinyl sulfonate and modified fine coal
Ash is added in three-necked flask, while adds aqueous solvent, is configured to the solution that mass fraction is 30%, is warming up to 90 DEG C to material
All dissolvings；Then temperature is adjusted to after 65 DEG C, adds ammonium persulfate, carried out copolymerization 6h, obtain polycarboxylic acid
Water reducer.
The thickener is hydroxypropyl methyl fiber ether；
The filler is flyash；
The preparation method of novel cement concrete comprises at least following steps：
It is stirred after cement and water are mixed, early strength agent, water reducer is then sequentially added in the state of stirring, is filled out
Material, mixed material is stirred, then adds thickener, stirs and can obtain novel cement concrete.
Embodiment 2：
Embodiments of the invention 2 provide a kind of novel cement concrete, in parts by weight, including at least following components：
The cement is purchased from Anhui Co., Ltd of conch group；
The early strength agent, in parts by weight, including following components：
Nano-calcium carbonate is purchased from Shanghai Yuan Jiang Chemical Co., Ltd.s；The mesoporous silica nanospheres are purchased from Nanjing Xian Feng
Nono-material Science ＆ Technology Ltd., production code member are XFF11 7440-21-3.
The preparation method of the early strength agent is as follows：Weigh the calcium formates of corresponding parts by weight, calcium acetate, nano-calcium carbonate, Jie
Hole silica nanosphere and deionized water, after being mixed, temperature is increased to 80 DEG C, then stir mixing, after
Obtain early strength agent.
The water reducer is polycarboxylic acids dehydragent；
The preparing raw material of the polycarboxylic acids dehydragent, in parts by weight, comprise at least：
The modified coal ash is vinyltrimethoxy silane modified coal ash.
The preparation method of the vinyltrimethoxy silane modified coal ash comprises at least following steps：
(1) add water into 10g flyash and be uniformly dispersed, wash 3 times and do using absolute ethyl alcohol again after centrifugation
It is dry, the NaOH solution of mass concentration 10% is then added, is flowed back 12 hours at 100 DEG C, reaction uses mass concentration 10% after terminating
Sulfuric acid solution adjust pH value to neutrality, washed 3 times with absolute ethyl alcohol and obtain pretreated flyash after being dried in vacuo；
(2) under the conditions of ice-water bath, the hydrogen peroxide solution that 2mL mass concentrations are 30% is added into 3mL mass concentrations is
In 98% sulfuric acid solution, mix acid liquor is obtained；Then it is molten the pretreated flyash of step (1) to be added slowly to mixing
In liquid, stirring reaction 20min, water washing is carried out again, and obtain hydroxylating flyash after drying under nitrogen protection；
(3) weigh hydroxylating flyash, 2g vinyltrimethoxy silanes and 100mL toluene in 10g steps (2),
0.1g hydroquinones, wherein, reaction system is reacted 15h at 100 DEG C, is cooled to room temperature, centrifuges by hydroquinones as polymerization inhibitor
Separation, the solid that centrifugation obtains is redissolved in toluene, then centrifuges again, 24h is dried under vacuum and obtains second
Alkenyl trimethoxy silane modified coal ash.
The preparation method of the polycarboxylic acids dehydragent, including at least following steps：
By the maleic anhydride of corresponding parts by weight, methacrylic acid, vinylpyridine, sodium vinyl sulfonate and modified fine coal
Ash is added in three-necked flask, while adds aqueous solvent, is configured to the solution that mass fraction is 30%, is warming up to 90 DEG C to material
All dissolvings；Then temperature is adjusted to after 65 DEG C, adds ammonium persulfate, carried out copolymerization 6h, obtain polycarboxylic acid
Water reducer.
The thickener is hydroxypropyl methyl fiber ether；
The filler is flyash；
The preparation method of novel cement concrete comprises at least following steps：
It is stirred after cement and water are mixed, early strength agent, water reducer is then sequentially added in the state of stirring, is filled out
Material, mixed material is stirred, then adds thickener, stirs and can obtain novel cement concrete.
Embodiment 3：
Embodiments of the invention 3 provide a kind of novel cement concrete, in parts by weight, including at least following components：
The cement is purchased from Anhui Co., Ltd of conch group；
The early strength agent, in parts by weight, including following components：
Nano-calcium carbonate is purchased from Shanghai Yuan Jiang Chemical Co., Ltd.s；The mesoporous silica nanospheres are purchased from Nanjing Xian Feng
Nono-material Science ＆ Technology Ltd., production code member are XFF11 7440-21-3.
The preparation method of the early strength agent is as follows：Weigh the calcium formates of corresponding parts by weight, calcium acetate, nano-calcium carbonate, Jie
Hole silica nanosphere and deionized water, after being mixed, temperature is increased to 80 DEG C, then stir mixing, after
Obtain early strength agent.
The water reducer is polycarboxylic acids dehydragent；
The preparing raw material of the polycarboxylic acids dehydragent, in parts by weight, comprise at least：
The modified coal ash is vinyltrimethoxy silane modified coal ash.
The preparation method of the vinyltrimethoxy silane modified coal ash comprises at least following steps：
(1) add water into 10g flyash and be uniformly dispersed, wash 3 times and do using absolute ethyl alcohol again after centrifugation
It is dry, the NaOH solution of mass concentration 10% is then added, is flowed back 12 hours at 100 DEG C, reaction uses mass concentration 10% after terminating
Sulfuric acid solution adjust pH value to neutrality, washed 3 times with absolute ethyl alcohol and obtain pretreated flyash after being dried in vacuo；
(2) under the conditions of ice-water bath, the hydrogen peroxide solution that 2mL mass concentrations are 30% is added into 3mL mass concentrations is
In 98% sulfuric acid solution, mix acid liquor is obtained；Then it is molten the pretreated flyash of step (1) to be added slowly to mixing
In liquid, stirring reaction 20min, water washing is carried out again, and obtain hydroxylating flyash after drying under nitrogen protection；
(3) weigh hydroxylating flyash, 2g vinyltrimethoxy silanes and 100mL toluene in 10g steps (2),
0.1g hydroquinones, wherein, reaction system is reacted 15h at 100 DEG C, is cooled to room temperature, centrifuges by hydroquinones as polymerization inhibitor
Separation, the solid that centrifugation obtains is redissolved in toluene, then centrifuges again, 24h is dried under vacuum and obtains second
Alkenyl trimethoxy silane modified coal ash.
The preparation method of the polycarboxylic acids dehydragent, including at least following steps：
By the maleic anhydride of corresponding parts by weight, methacrylic acid, vinylpyridine, sodium vinyl sulfonate and modified fine coal
Ash is added in three-necked flask, while adds aqueous solvent, is configured to the solution that mass fraction is 30%, is warming up to 90 DEG C to material
All dissolvings；Then temperature is adjusted to after 65 DEG C, adds ammonium persulfate, carried out copolymerization 6h, obtain polycarboxylic acid
Water reducer.
The thickener is hydroxypropyl methyl fiber ether；
The filler is flyash；
The preparation method of novel cement concrete comprises at least following steps：
It is stirred after cement and water are mixed, early strength agent, water reducer is then sequentially added in the state of stirring, is filled out
Material, mixed material is stirred, then adds thickener, stirs and can obtain novel cement concrete.
Comparative example 1：
With embodiment 3, difference is the comparative example 1 of the present invention, is added without early strength agent.
Comparative example 2：
With embodiment 3, difference is the comparative example 2 of the present invention, and mesoporous silica nanospheres are not included in early strength agent.
Comparative example 3：
With embodiment 3, difference is the comparative example 3 of the present invention, and nano-calcium carbonate is not included in early strength agent.
Comparative example 4：
With embodiment 3, difference is the comparative example 4 of the present invention, and mesoporous silica nanospheres are not included in early strength agent
And nano-calcium carbonate.
Comparative example 5：
With embodiment 3, difference is the comparative example 5 of the present invention, and mesoporous silica nanospheres are replaced with into mesoporous two
Silica MCM-41, the mesoporous silicon oxide are purchased from Nanjing Xian Feng Nono-material Science ＆ Technology Ltd..
Comparative example 6：
With embodiment 3, difference is the comparative example 6 of the present invention, is added without polycarboxylic acids dehydragent.
Comparative example 7：
With embodiment 3, difference is the comparative example 7 of the present invention, by the preparing raw material of polycarboxylic acids dehydragent, is not added with
Enter vinylpyridine.
Comparative example 8：
With embodiment 3, difference is the comparative example 8 of the present invention, by the preparing raw material of polycarboxylic acids dehydragent, is not added with
Enter sodium vinyl sulfonate.
Comparative example 9：
With embodiment 3, difference is the comparative example 9 of the present invention, by the preparing raw material of polycarboxylic acids dehydragent, is not added with
Enter 4- vinyl benzyl -15- crown ethers -5.
Comparative example 10：
With embodiment 3, difference is the comparative example 10 of the present invention, by the preparing raw material of polycarboxylic acids dehydragent, no
Add modified coal ash.
Comparative example 11：
With embodiment 3, difference is the comparative example 11 of the present invention, by the preparing raw material of polycarboxylic acids dehydragent, incites somebody to action
Modified coal ash is replaced with flyash.
Comparative example 12：
With embodiment 3, difference is the comparative example 12 of the present invention, by the preparing raw material of polycarboxylic acids dehydragent, incites somebody to action
Modified coal ash is replaced with vinyltrimethoxy silane.
Comparative example 13：
The comparative example 13 of the present invention is with embodiment 3, and difference is, by vinyltrimethoxy silane modified coal ash more
Change vinyltrimethoxy silane and the direct physical mixed of flyash into.
Performance test：
1st, intensity test, according to《Standard for test methods of mechanical properties of ordinary concrete》(GB/T50081-2011) enter
Row intensity test, wherein test condition are：30 DEG C, 101KPa, humidity 100%.
2nd, according to GB/T50082-2009 normal concretes chronicity and durability test method standard, test block forming 28d
Afterwards, it is put into after being sealed with paraffin in concrete permeation tester, tests seepage-resistant grade.
The performance test results of table 1
In addition, the novel cement concrete of the present invention, especially embodiment 3 also have extraordinary chemical resistance
Can, its service life is up to 80 years.
Above-mentioned example is merely illustrative, some features of the feature for explaining the present invention.Appended claim
It is intended to require the scope as wide as possible being contemplated that, and embodiments as presented herein is only according to all possible embodiment
Combination selection embodiment explanation.Therefore, the purpose of applicant is appended claim not by the explanation present invention
Feature example selectional restriction, and the progress in science and technology will not formed due to the inaccuracy of language performance and not
The possible equivalent or son being presently considered are replaced, and these changes should also be interpreted by appended in the conceived case
Claim covers.
Claims (10)
1. a kind of novel cement concrete, in parts by weight, it is characterised in that including at least following components：
2. novel cement concrete as claimed in claim 1, it is characterised in that the early strength agent, in parts by weight, at least wrap
Include following components：
3. novel cement concrete as claimed in claim 1, it is characterised in that the water reducer is polycarboxylic acids dehydragent.
4. novel cement concrete as claimed in claim 3, it is characterised in that the preparation of the polycarboxylic acids dehydragent is former
Material, in parts by weight, is comprised at least
5. novel cement concrete as claimed in claim 4, it is characterised in that the preparation of the polycarboxylic acids dehydragent is former
Material, in parts by weight, is comprised at least
6. novel cement concrete as claimed in claim 4, it is characterised in that the modified coal ash is vinyl trimethoxy
Base silane modified coal ash.
7. novel cement concrete as claimed in claim 6, it is characterised in that the vinyltrimethoxy silane is modified powder
In coal ash, the weight ratio between vinyltrimethoxy silane and flyash is (1~3)：10.
8. novel cement concrete as claimed in claim 1, it is characterised in that the thickener is hydroxypropyl methyl fiber
Any one or a few mixing in ether, polyvinyl alcohol.
9. novel cement concrete as claimed in claim 1, it is characterised in that the filler is in flyash, hydrotalcite
Any one or a few mixing.
10. application of the novel cement concrete described in claim 1~9 any one in construction wall.
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| CN107840591B CN107840591B (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553350A (en) * | 2018-12-24 | 2019-04-02 | 海门市帕源道路工程材料有限公司 | A kind of concrete and preparation method thereof |
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| CN104891884A (en) * | 2015-05-20 | 2015-09-09 | 中民筑友有限公司 | C35 low-gel-material self-compacting concrete and preparation method thereof |
| CN104944824A (en) * | 2015-07-10 | 2015-09-30 | 重庆大学 | Cement concrete early strength agent and early strength and water reduction agent |
| CN105347716A (en) * | 2015-11-24 | 2016-02-24 | 中国石油大学(华东) | Dispersive chlorine-free low-temperature early-strength agent used for oil well cement and cement mortar including same |
| CN106866895A (en) * | 2017-03-27 | 2017-06-20 | 南宁新泰瑞科建材有限公司 | A kind of high-performance poly carboxylic acid series water reducer and preparation method thereof |
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| CN104891884A (en) * | 2015-05-20 | 2015-09-09 | 中民筑友有限公司 | C35 low-gel-material self-compacting concrete and preparation method thereof |
| CN104944824A (en) * | 2015-07-10 | 2015-09-30 | 重庆大学 | Cement concrete early strength agent and early strength and water reduction agent |
| CN105347716A (en) * | 2015-11-24 | 2016-02-24 | 中国石油大学(华东) | Dispersive chlorine-free low-temperature early-strength agent used for oil well cement and cement mortar including same |
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| CN109553350A (en) * | 2018-12-24 | 2019-04-02 | 海门市帕源道路工程材料有限公司 | A kind of concrete and preparation method thereof |
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| CN107840591B (en) | 2020-06-26 |
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