CN107840591B - Cement concrete and application thereof in building wall - Google Patents
Cement concrete and application thereof in building wall Download PDFInfo
- Publication number
- CN107840591B CN107840591B CN201711247264.7A CN201711247264A CN107840591B CN 107840591 B CN107840591 B CN 107840591B CN 201711247264 A CN201711247264 A CN 201711247264A CN 107840591 B CN107840591 B CN 107840591B
- Authority
- CN
- China
- Prior art keywords
- fly ash
- parts
- cement concrete
- weight
- reducing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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]
Landscapes
- Chemical & Material Sciences (AREA)
- 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 invention relates to the field of building materials, and particularly provides novel cement concrete and application thereof. The invention provides a novel cement concrete, which at least comprises the following components in parts by weight: 80-100 parts of cement; 0.1-5 parts of an early strength agent; 0.1-1 part of a water reducing agent; 0.01-3 parts of a thickening agent; 5-20 parts of a filler; 50-80 parts of water. In a second aspect, the present invention provides the use of the novel cement concrete in building walls.
Description
Technical Field
The invention relates to the field of building materials, and particularly provides cement concrete and application thereof in a building wall.
Background
With the development of energy-saving buildings and wall heat-insulating technologies, the energy development strategy of 'energy conservation priority' is implemented, and higher requirements are put forward on the energy-saving technologies. At present, wall material patterns which mainly comprise concrete blocks and are assisted by non-clay bricks and building boards are preliminarily formed, and remarkable social, economic and environmental benefits are obtained.
In the current building industry, the demand for non-bearing light heat-insulating wall body boards is very big, and the division wall body material that the tradition used is clay brick, hollow brick, foaming concrete block, cinder brick and expanded perlite brick etc. mostly, this type of wall body seam is many, need consume the clay a bit, and the weight is heavy, though a bit is light relatively, but need mortar cement to plaster, and engineering man-hour is many.
Concrete is the most used building material in the world at present, and the main advantages of low price, strong bearing capacity and high durability are the concrete. However, due to the slow hydration reaction process of the portland cement and the influence of the environmental temperature, the strength of the concrete develops slowly, the strength of the demolished template can be achieved generally within more than 24 hours, the strength within 3 days can only reach 40-50% of the designed strength, and the strength within 28 days can only reach the designed strength. Meanwhile, with the development of concrete technology, industrial waste is more and more widely applied to concrete as a basic raw material, and in order to reduce early hydration heat and improve concrete durability in the production of large prefabricated parts, a large amount of mineral admixtures such as mineral powder and fly ash are used, so that the early strength of the concrete is more slowly developed, and the process progress such as mold turnover, prestress loading and the like is influenced.
In order to improve the early strength of concrete, accelerate the turnover of moulds and improve the production efficiency, the following method is generally adopted. (1) Adding an early strength agent: the chlorine salt early strength agent is the earliest applied inorganic salt early strength agent, can improve the early strength of concrete, but is strictThe later strength of the concrete is seriously affected and because it contains Cl-The corrosion of the steel bar is easy to cause, and the application is limited. The sulfate early strength agent is easy to cause the deterioration of later performance, and white frost is easy to separate out on the surface of concrete, thereby affecting the appearance. (2) Reducing the water-gel ratio: the method for increasing the cement consumption or using the superfine cement comprises the following steps: the method has the problems that the self-shrinkage of the concrete is greatly increased, the cracking risk is increased, the production operation is difficult, the additive consumption is obviously increased, and the production cost is greatly increased. (3) Curing by using high-temperature steam: under the high-temperature steam curing condition, the hydrated crystal size of the cement is large, the brittleness is increased, and the durability is reduced.
Therefore, it is highly desirable to provide a cement concrete which can be applied to a building wall to achieve a better effect through technical improvement.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a cement concrete comprising at least the following components in parts by weight:
as a preferable technical scheme of the invention, the early strength agent at least comprises the following components in parts by weight:
as a preferable technical scheme, the water reducing agent is a polycarboxylic acid water reducing agent.
As a preferable technical scheme of the invention, the raw materials for preparing the polycarboxylic acid water reducing agent at least comprise the following components in parts by weight
As a preferable technical scheme of the invention, the raw materials for preparing the polycarboxylic acid water reducing agent at least comprise the following components in parts by weight
As a preferable technical scheme, the modified fly ash is vinyl trimethoxy silane modified fly ash.
According to a preferable technical scheme of the invention, in the vinyltrimethoxysilane modified fly ash, the weight ratio of vinyltrimethoxysilane to fly ash is (1-3): 10.
as a preferable technical scheme of the invention, the thickening agent is any one or a mixture of several of hydroxypropyl methyl cellulose ether and polyvinyl alcohol.
As a preferred technical scheme of the invention, the filler is any one or a mixture of more of fly ash and hydrotalcite.
In a second aspect the invention provides the use of cement concrete in a building wall.
The above-described and other features, aspects, and advantages of the present application will become more apparent with reference to the following detailed description.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
"Polymer" means a polymeric compound prepared by polymerizing monomers of the same or different types. The generic term "polymer" embraces the terms "homopolymer", "copolymer", "terpolymer" and "interpolymer". "interpolymer" means a polymer prepared by polymerizing at least two different monomers. The generic term "interpolymer" includes the term "copolymer" (which is generally used to refer to polymers prepared from two different monomers) and the term "terpolymer" (which is generally used to refer to polymers prepared from three different monomers). It also includes polymers made by polymerizing more monomers. "blend" means a polymer formed by two or more polymers being mixed together by physical or chemical means.
In order to solve the above problems, a first aspect of the present invention provides a cement concrete comprising at least the following components in parts by weight:
in a preferred embodiment, the cement concrete at least comprises the following components in parts by weight:
cement
In the present invention, the cement is not particularly limited, and may be any commercially available cement of any brand, and the cement is available from the limited liability company of the Oncorhynchus in Anhui province.
Early strength agent
In the invention, the early strength agent is an additive which can improve the early strength of concrete and has no obvious influence on the later strength. The early strength agent has the main functions of accelerating the hydration speed of the cement and promoting the development of the early strength of the concrete; not only has the early strength function, but also has certain water reducing and enhancing functions.
In a preferred embodiment, the early strength agent at least comprises the following components in parts by weight:
the early strength agent relates to the raw materials which are all obtained from the market, wherein the nano calcium carbonate is purchased from Shanghai Yangjiang chemical industry Co., Ltd; the mesoporous silica nanospheres are purchased from Nanjing Xiancheng nanomaterial science and technology Limited, and the product number is XFF 117440-21-3.
In a preferred embodiment, the early strength agent is prepared by the following method: weighing corresponding parts by weight of calcium formate, calcium acetate, nano calcium carbonate, mesoporous silica nanospheres and deionized water, mixing, raising the temperature to 80 ℃, and then uniformly stirring and mixing to obtain the early strength agent.
Water reducing agent
In the invention, the water reducing agent is a concrete admixture capable of reducing the mixing water consumption under the condition of maintaining the slump constant of concrete basically.
In a preferred embodiment, the water reducing agent is a polycarboxylic acid water reducing agent.
In a preferred embodiment, the raw materials for preparing the polycarboxylic acid water reducing agent at least comprise the following components in parts by weight:
in a preferred embodiment, the raw material for preparing the polycarboxylic acid water reducing agent at least comprises the following components in parts by weight
In a preferred embodiment, the raw materials for preparing the polycarboxylic acid water reducing agent at least comprise the following components in parts by weight:
in a preferred embodiment, the modified fly ash is a vinyltrimethoxysilane modified fly ash.
In a preferred embodiment, the weight ratio of the vinyltrimethoxysilane to the fly ash is (1-3): 10.
in a preferred embodiment, the method for preparing the vinyltrimethoxysilane modified fly ash at least comprises the following steps:
(1) adding water into 10g of fly ash, uniformly dispersing, washing with absolute ethyl alcohol for 3 times after centrifugal separation, drying, then adding a NaOH solution with the mass concentration of 10%, refluxing for 12 hours at 100 ℃, adjusting the pH value to be neutral by using a sulfuric acid solution with the mass concentration of 10% after the reaction is finished, washing with absolute ethyl alcohol for 3 times, and drying in vacuum to obtain pretreated fly ash;
(2) under the condition of ice-water bath, adding 2mL of hydrogen peroxide solution with the mass concentration of 30% into 3mL of sulfuric acid solution with the mass concentration of 98% to obtain mixed acid liquid; then, slowly adding the pretreated fly ash obtained in the step (1) into the mixed solution, stirring and reacting for 20min, washing with water again, and drying under the protection of nitrogen to obtain hydroxylated fly ash;
(3) weighing 10g of hydroxylated fly ash in the step (2), 2g of vinyltrimethoxysilane, 100mL of toluene and 0.1g of hydroquinone, wherein the hydroquinone is used as a polymerization inhibitor, reacting the reaction system at 100 ℃ for 15h, cooling to room temperature, performing centrifugal separation, re-dissolving the solid obtained by centrifugation in the toluene, performing centrifugal separation again, and drying under vacuum for 24h to obtain the vinyltrimethoxysilane modified fly ash.
In a preferred embodiment, the preparation method of the polycarboxylic acid water reducing agent at least comprises the following steps:
adding maleic anhydride, methacrylic acid, vinyl pyridine, sodium vinyl sulfonate and modified fly ash in corresponding weight parts into a three-neck flask, adding solvent water at the same time to prepare a solution with the mass fraction of 30%, and heating to 90 ℃ until the materials are completely dissolved; and then adjusting the temperature to 65 ℃, adding ammonium persulfate, and carrying out copolymerization reaction for 6h to obtain the polycarboxylic acid water reducer.
Thickening agent
In a preferred embodiment, the thickener is any one of hydroxypropyl methyl cellulose ether and polyvinyl alcohol.
Filler material
In a preferred embodiment, the filler is any one or a mixture of several of fly ash and hydrotalcite.
The preparation method of the cement concrete at least comprises the following steps:
mixing cement and water, stirring, then sequentially adding the early strength agent, the water reducing agent and the filler under the stirring state, uniformly stirring the mixed materials, then adding the thickening agent, and uniformly stirring to obtain the cement concrete.
In a second aspect the invention provides the use of cement concrete in a building wall.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the raw materials used are commercially available from national chemical reagents, unless otherwise specified.
Example 1:
the embodiment 1 of the invention provides cement concrete which comprises the following components in parts by weight:
the cement is purchased from Oncomelania Hupensis group, Inc. of Anhui;
the early strength agent comprises the following components in parts by weight:
the nano calcium carbonate is purchased from Shanghai Jiangjiang chemical industry Co., Ltd; the mesoporous silica nanospheres are purchased from Nanjing Xiancheng nanomaterial science and technology Limited, and the product number is XFF 117440-21-3.
The preparation method of the early strength agent comprises the following steps: weighing corresponding parts by weight of calcium formate, calcium acetate, nano calcium carbonate, mesoporous silica nanospheres and deionized water, mixing, raising the temperature to 80 ℃, and then uniformly stirring and mixing to obtain the early strength agent.
The water reducing agent is a polycarboxylic acid water reducing agent;
the polycarboxylic acids water reducing agent at least comprises the following raw materials in parts by weight:
the modified fly ash is vinyl trimethoxy silane modified fly ash.
The preparation method of the vinyltrimethoxysilane modified fly ash at least comprises the following steps:
(1) adding water into 10g of fly ash, uniformly dispersing, washing with absolute ethyl alcohol for 3 times after centrifugal separation, drying, then adding a NaOH solution with the mass concentration of 10%, refluxing for 12 hours at 100 ℃, adjusting the pH value to be neutral by using a sulfuric acid solution with the mass concentration of 10% after the reaction is finished, washing with absolute ethyl alcohol for 3 times, and drying in vacuum to obtain pretreated fly ash;
(2) under the condition of ice-water bath, adding 2mL of hydrogen peroxide solution with the mass concentration of 30% into 3mL of sulfuric acid solution with the mass concentration of 98% to obtain mixed acid liquid; then, slowly adding the pretreated fly ash obtained in the step (1) into the mixed solution, stirring and reacting for 20min, washing with water again, and drying under the protection of nitrogen to obtain hydroxylated fly ash;
(3) weighing 10g of hydroxylated fly ash in the step (2), 2g of vinyltrimethoxysilane, 100mL of toluene and 0.1g of hydroquinone, wherein the hydroquinone is used as a polymerization inhibitor, reacting the reaction system at 100 ℃ for 15h, cooling to room temperature, performing centrifugal separation, re-dissolving the solid obtained by centrifugation in the toluene, performing centrifugal separation again, and drying under vacuum for 24h to obtain the vinyltrimethoxysilane modified fly ash.
The preparation method of the polycarboxylic acid water reducing agent at least comprises the following steps:
adding maleic anhydride, methacrylic acid, vinyl pyridine, sodium vinyl sulfonate and modified fly ash in corresponding weight parts into a three-neck flask, adding solvent water at the same time to prepare a solution with the mass fraction of 30%, and heating to 90 ℃ until the materials are completely dissolved; and then adjusting the temperature to 65 ℃, adding ammonium persulfate, and carrying out copolymerization reaction for 6h to obtain the polycarboxylic acid water reducer.
The thickening agent is hydroxypropyl methyl cellulose ether;
the filler is fly ash;
the preparation method of the cement concrete at least comprises the following steps:
mixing cement and water, stirring, then sequentially adding the early strength agent, the water reducing agent and the filler under the stirring state, uniformly stirring the mixed materials, then adding the thickening agent, and uniformly stirring to obtain the cement concrete.
Example 2:
embodiment 2 of the present invention provides a cement concrete, which at least comprises the following components in parts by weight:
100 parts of cement;
the cement is purchased from Oncomelania Hupensis group, Inc. of Anhui;
the early strength agent comprises the following components in parts by weight:
the nano calcium carbonate is purchased from Shanghai Jiangjiang chemical industry Co., Ltd; the mesoporous silica nanospheres are purchased from Nanjing Xiancheng nanomaterial science and technology Limited, and the product number is XFF 117440-21-3.
The preparation method of the early strength agent comprises the following steps: weighing corresponding parts by weight of calcium formate, calcium acetate, nano calcium carbonate, mesoporous silica nanospheres and deionized water, mixing, raising the temperature to 80 ℃, and then uniformly stirring and mixing to obtain the early strength agent.
The water reducing agent is a polycarboxylic acid water reducing agent;
the polycarboxylic acids water reducing agent at least comprises the following raw materials in parts by weight:
the modified fly ash is vinyl trimethoxy silane modified fly ash.
The preparation method of the vinyltrimethoxysilane modified fly ash at least comprises the following steps:
(1) adding water into 10g of fly ash, uniformly dispersing, washing with absolute ethyl alcohol for 3 times after centrifugal separation, drying, then adding a NaOH solution with the mass concentration of 10%, refluxing for 12 hours at 100 ℃, adjusting the pH value to be neutral by using a sulfuric acid solution with the mass concentration of 10% after the reaction is finished, washing with absolute ethyl alcohol for 3 times, and drying in vacuum to obtain pretreated fly ash;
(2) under the condition of ice-water bath, adding 2mL of hydrogen peroxide solution with the mass concentration of 30% into 3mL of sulfuric acid solution with the mass concentration of 98% to obtain mixed acid liquid; then, slowly adding the pretreated fly ash obtained in the step (1) into the mixed solution, stirring and reacting for 20min, washing with water again, and drying under the protection of nitrogen to obtain hydroxylated fly ash;
(3) weighing 10g of hydroxylated fly ash in the step (2), 2g of vinyltrimethoxysilane, 100mL of toluene and 0.1g of hydroquinone, wherein the hydroquinone is used as a polymerization inhibitor, reacting the reaction system at 100 ℃ for 15h, cooling to room temperature, performing centrifugal separation, re-dissolving the solid obtained by centrifugation in the toluene, performing centrifugal separation again, and drying under vacuum for 24h to obtain the vinyltrimethoxysilane modified fly ash.
The preparation method of the polycarboxylic acid water reducing agent at least comprises the following steps:
adding maleic anhydride, methacrylic acid, vinyl pyridine, sodium vinyl sulfonate and modified fly ash in corresponding weight parts into a three-neck flask, adding solvent water at the same time to prepare a solution with the mass fraction of 30%, and heating to 90 ℃ until the materials are completely dissolved; and then adjusting the temperature to 65 ℃, adding ammonium persulfate, and carrying out copolymerization reaction for 6h to obtain the polycarboxylic acid water reducer.
The thickening agent is hydroxypropyl methyl cellulose ether;
the filler is fly ash;
the preparation method of the cement concrete at least comprises the following steps:
mixing cement and water, stirring, then sequentially adding the early strength agent, the water reducing agent and the filler under the stirring state, uniformly stirring the mixed materials, then adding the thickening agent, and uniformly stirring to obtain the cement concrete.
Example 3:
embodiment 3 of the present invention provides a cement concrete, which at least comprises the following components in parts by weight:
the cement is purchased from Oncomelania Hupensis group, Inc. of Anhui;
the early strength agent comprises the following components in parts by weight:
the nano calcium carbonate is purchased from Shanghai Jiangjiang chemical industry Co., Ltd; the mesoporous silica nanospheres are purchased from Nanjing Xiancheng nanomaterial science and technology Limited, and the product number is XFF 117440-21-3.
The preparation method of the early strength agent comprises the following steps: weighing corresponding parts by weight of calcium formate, calcium acetate, nano calcium carbonate, mesoporous silica nanospheres and deionized water, mixing, raising the temperature to 80 ℃, and then uniformly stirring and mixing to obtain the early strength agent.
The water reducing agent is a polycarboxylic acid water reducing agent;
the polycarboxylic acids water reducing agent at least comprises the following raw materials in parts by weight:
the modified fly ash is vinyl trimethoxy silane modified fly ash.
The preparation method of the vinyltrimethoxysilane modified fly ash at least comprises the following steps:
(1) adding water into 10g of fly ash, uniformly dispersing, washing with absolute ethyl alcohol for 3 times after centrifugal separation, drying, then adding a NaOH solution with the mass concentration of 10%, refluxing for 12 hours at 100 ℃, adjusting the pH value to be neutral by using a sulfuric acid solution with the mass concentration of 10% after the reaction is finished, washing with absolute ethyl alcohol for 3 times, and drying in vacuum to obtain pretreated fly ash;
(2) under the condition of ice-water bath, adding 2mL of hydrogen peroxide solution with the mass concentration of 30% into 3mL of sulfuric acid solution with the mass concentration of 98% to obtain mixed acid liquid; then, slowly adding the pretreated fly ash obtained in the step (1) into the mixed solution, stirring and reacting for 20min, washing with water again, and drying under the protection of nitrogen to obtain hydroxylated fly ash;
(3) weighing 10g of hydroxylated fly ash in the step (2), 2g of vinyltrimethoxysilane, 100mL of toluene and 0.1g of hydroquinone, wherein the hydroquinone is used as a polymerization inhibitor, reacting the reaction system at 100 ℃ for 15h, cooling to room temperature, performing centrifugal separation, re-dissolving the solid obtained by centrifugation in the toluene, performing centrifugal separation again, and drying under vacuum for 24h to obtain the vinyltrimethoxysilane modified fly ash.
The preparation method of the polycarboxylic acid water reducing agent at least comprises the following steps:
adding maleic anhydride, methacrylic acid, vinyl pyridine, sodium vinyl sulfonate and modified fly ash in corresponding weight parts into a three-neck flask, adding solvent water at the same time to prepare a solution with the mass fraction of 30%, and heating to 90 ℃ until the materials are completely dissolved; and then adjusting the temperature to 65 ℃, adding ammonium persulfate, and carrying out copolymerization reaction for 6h to obtain the polycarboxylic acid water reducer.
The thickening agent is hydroxypropyl methyl cellulose ether;
the filler is fly ash;
the preparation method of the cement concrete at least comprises the following steps:
mixing cement and water, stirring, then sequentially adding the early strength agent, the water reducing agent and the filler under the stirring state, uniformly stirring the mixed materials, then adding the thickening agent, and uniformly stirring to obtain the cement concrete.
Comparative example 1:
comparative example 1 of the present invention is different from example 3 in that no early strength agent is added.
Comparative example 2:
the comparative example 2 of the present invention is different from the example 3 in that the mesoporous silica nanospheres are not included in the early strength agent.
Comparative example 3:
comparative example 3 of the present invention is different from example 3 in that nano calcium carbonate is not included in the early strength agent.
Comparative example 4:
the comparative example 4 of the present invention is different from the example 3 in that the mesoporous silica nanospheres and the nano calcium carbonate are not included in the early strength agent.
Comparative example 5:
the comparative example 5 of the present invention is the same as example 3, except that mesoporous silica nanospheres, which are commercially available from Nanjing Xiancheng nanomaterial science and technology Limited, were replaced with mesoporous silica MCM-41.
Comparative example 6:
comparative example 6 of the present invention is the same as example 3 except that no polycarboxylic acid water reducing agent is added.
Comparative example 7:
comparative example 7 of the present invention is similar to example 3, except that vinylpyridine was not added to the starting material for the production of the polycarboxylic acid water-reducing agent.
Comparative example 8:
the comparative example 8 of the present invention is the same as example 3 except that sodium vinylsulfonate was not added to the raw materials for preparing the polycarboxylic acid water reducing agent.
Comparative example 9:
the difference between comparative example 9 and example 3 is that 4-vinylbenzyl-15-crown ether-5 is not added to the raw materials for preparing the polycarboxylic acid water reducing agent.
Comparative example 10:
the difference between the comparative example 10 and the example 3 is that the modified fly ash is not added to the raw materials for preparing the polycarboxylic acid water reducing agent.
Comparative example 11:
the difference between the comparative example 11 and the example 3 is that the modified fly ash is replaced by the fly ash in the raw material for preparing the polycarboxylic acid water reducing agent.
Comparative example 12:
the comparative example 12 of the present invention is similar to example 3, except that the modified fly ash was replaced with vinyltrimethoxysilane in the raw material for the preparation of the polycarboxylic acid water reducing agent.
Comparative example 13:
comparative example 13 of the present invention is the same as example 3 except that vinyltrimethoxysilane modified fly ash was changed to vinyltrimethoxysilane and fly ash were directly and physically mixed.
And (3) performance testing:
1. and (3) testing the compressive strength according to the standard of the test method for the mechanical properties of common concrete (GB/T50081-2011), wherein the test conditions are as follows: 30 ℃, 101KPa and 100% humidity.
2. According to the standard of the test method for the long-term performance and the durability of GB/T50082-2009 common concrete, after a test block is molded for 28d, the test block is sealed by paraffin and then placed into a concrete permeability tester to test the impermeability grade.
Table 1 results of performance testing
Furthermore, the cement concrete of the invention, especially example 3, also has very good chemical resistance and a service life of up to 80 years.
The above examples are merely illustrative and serve to explain some of the features of the invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims not be limited by the choice of examples illustrating features of the invention, and that technological advances will form possible equivalents or sub-substitutes not presently contemplated for reasons of inaccuracy of the linguistic expressions, and that such variations are to be construed as being covered by the appended claims where possible.
Claims (6)
1. The cement concrete is characterized by at least comprising the following components in parts by weight:
the early strength agent at least comprises the following components in parts by weight:
the water reducing agent is a polycarboxylic acid water reducing agent; the raw materials for preparing the polycarboxylic acid water reducing agent at least comprise the following components in parts by weight
The preparation method of the polycarboxylic acid water reducing agent at least comprises the following steps:
adding maleic anhydride, methacrylic acid, vinyl pyridine, sodium vinyl sulfonate and modified fly ash in corresponding weight parts into a three-neck flask, adding solvent water at the same time to prepare a solution with the mass fraction of 30%, and heating to 90 ℃ until the materials are completely dissolved; then, after the temperature is adjusted to 65 ℃, ammonium persulfate is added for copolymerization reaction for 6 hours to obtain the polycarboxylic acid water reducer;
the modified fly ash is vinyl trimethoxy silane modified fly ash.
2. The cement concrete of claim 1, wherein the raw materials for preparing the polycarboxylic acid water reducer at least comprise the following components in parts by weight
3. The cement concrete according to claim 1, wherein in the vinyltrimethoxysilane modified fly ash, the weight ratio of the vinyltrimethoxysilane to the fly ash is (1-3): 10.
4. the cement concrete of claim 1, wherein the thickener is one or a mixture of hydroxypropyl methylcellulose ether and polyvinyl alcohol.
5. The cement concrete according to claim 1, wherein the filler is any one or a mixture of fly ash and hydrotalcite.
6. Use of the cement concrete according to any one of claims 1 to 5 in a building wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247264.7A CN107840591B (en) | 2017-12-01 | 2017-12-01 | Cement concrete and application thereof in building wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247264.7A CN107840591B (en) | 2017-12-01 | 2017-12-01 | Cement concrete and application thereof in building wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107840591A CN107840591A (en) | 2018-03-27 |
| CN107840591B true CN107840591B (en) | 2020-06-26 |
Family
ID=61664377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711247264.7A Active CN107840591B (en) | 2017-12-01 | 2017-12-01 | Cement concrete and application thereof in building wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107840591B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553350B (en) * | 2018-12-24 | 2021-07-20 | 海门市帕源道路工程材料有限公司 | Concrete and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2017
- 2017-12-01 CN CN201711247264.7A patent/CN107840591B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107840591A (en) | 2018-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110105029B (en) | Waterproof thermal insulation mortar for 3D printing building and preparation method and application thereof | |
| CN102718424B (en) | High-activity granulated blast furnace slag and preparation method thereof | |
| CN107840592B (en) | Concrete self-repairing functional additive and preparation method thereof | |
| CN103359971B (en) | Nuclear-power concrete air-entraining polycarboxylic acid additive | |
| CN111233384B (en) | Graphene oxide reinforced geopolymer and preparation method thereof | |
| CN109293266A (en) | Heat of hydration suppressive swelling fiber compound anti-crack admixture and preparation method thereof | |
| CN112919864A (en) | Recycled aggregate fiber reinforced shotcrete and preparation method thereof | |
| CN110746166A (en) | Self-crystallized anti-permeability and moisture-proof mortar and production method thereof | |
| CN112661447A (en) | High-strength concrete building material and preparation method thereof | |
| CN111848070A (en) | Aluminate cement mortar for cast iron pipe lining and preparation method thereof | |
| CN107840591B (en) | Cement concrete and application thereof in building wall | |
| CN112851273B (en) | Iron tailing sand-based energy-saving heat-insulating lightweight concrete and preparation method and application thereof | |
| CN114031358A (en) | Gypsum-based thermal insulation mortar and preparation method thereof | |
| CN106116422B (en) | A kind of light hollow thermal insulation board and preparation method thereof | |
| CN104987001A (en) | Preparation method for mortar of base layers of interior and exterior walls and decoration | |
| CN103992084A (en) | High-toughness aerated brick and making method thereof | |
| CN109721271B (en) | Polycarboxylate water reducing agent composition for self-compacting high-workability concrete | |
| CN116715483A (en) | High-bonding-strength flexible polymer modified mortar for repairing and reinforcing hydraulic building and preparation method thereof | |
| CN116409976A (en) | Rail plate sealing anchor mortar and preparation method thereof | |
| Lin et al. | Preparation of bamboo scraps/magnesium oxychloride lightweight composites with high water resistance by PVAc | |
| CN113233843B (en) | Mortar material with high freezing resistance and high corrosion resistance and preparation method thereof | |
| CN113004055B (en) | Green high-thermal-resistance self-insulation building block and preparation method thereof | |
| CN114262199A (en) | Waterborne epoxy modified floor mortar | |
| CN107721243B (en) | Additive for improving concrete strength and preparation method thereof | |
| CN113548832B (en) | Alkali-free liquid foam concrete conditioning and solidifying agent and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |