CN117819863A - Multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and preparation method thereof - Google Patents
Multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and preparation method thereof Download PDFInfo
- Publication number
- CN117819863A CN117819863A CN202311581201.0A CN202311581201A CN117819863A CN 117819863 A CN117819863 A CN 117819863A CN 202311581201 A CN202311581201 A CN 202311581201A CN 117819863 A CN117819863 A CN 117819863A
- Authority
- CN
- China
- Prior art keywords
- parts
- air entraining
- multifunctional concrete
- toughening
- concrete
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 102
- 239000000654 additive Substances 0.000 title claims abstract description 34
- 230000000996 additive effect Effects 0.000 title claims abstract description 32
- 239000006260 foam Substances 0.000 title claims abstract description 31
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 53
- 239000000178 monomer Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 239000003999 initiator Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 26
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 16
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 16
- 229920002401 polyacrylamide Polymers 0.000 claims description 15
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 2
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 claims description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 2
- 229940077388 benzenesulfonate Drugs 0.000 claims description 2
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 2
- -1 fatty alcohol sulfonate Chemical class 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 150000002978 peroxides Chemical class 0.000 claims description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 238000005187 foaming Methods 0.000 claims 1
- 229920005862 polyol Polymers 0.000 claims 1
- 150000003077 polyols Chemical class 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 16
- 239000000243 solution Substances 0.000 description 16
- 239000008367 deionised water Substances 0.000 description 12
- 229910021641 deionized water Inorganic materials 0.000 description 12
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 9
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 9
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000839 emulsion Substances 0.000 description 6
- 238000007720 emulsion polymerization reaction Methods 0.000 description 4
- 239000008030 superplasticizer Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- CYEJMVLDXAUOPN-UHFFFAOYSA-N 2-dodecylphenol Chemical compound CCCCCCCCCCCCC1=CC=CC=C1O CYEJMVLDXAUOPN-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F218/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2623—Polyvinylalcohols; Polyvinylacetates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
-
- 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
- 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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F118/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F118/02—Esters of monocarboxylic acids
- C08F118/04—Vinyl esters
- C08F118/08—Vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/12—Esters of monohydric alcohols or phenols
- C08F120/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F120/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/44—Thickening, gelling or viscosity increasing agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of concrete admixture, in particular to a multifunctional concrete admixture with toughening, air entraining and foam stabilizing functions and a preparation method thereof, wherein an emulsifying agent is added into water, heated to 35-45 ℃, then a polymer monomer, an initiator and an aqueous solution containing a macromolecular tackifier and an air entraining agent are synchronously added dropwise, and stirring reaction is carried out for 0.5-1.5 h; then heating to 60-70 ℃, continuously adding the rest polymer monomer and the initiator, continuously stirring and reacting for 3-4 h, and cooling to room temperature to obtain the multifunctional concrete additive. The multifunctional concrete admixture thus obtained has the functions of toughening, air entraining, foam stabilizing and the like, so that the dispersibility of the admixture in concrete is improved, the stability of the admixture is improved, and the performance of the concrete is ensured.
Description
Technical Field
The invention relates to the technical field of concrete additives, in particular to a multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and a preparation method thereof.
Background
Various additives are often introduced to adjust for different performance requirements of concrete, for example: the polymer can improve the internal cohesion of the concrete and improve the durability and long-term performance of the concrete; the air entraining agent can generate a large amount of tiny bubbles in the concrete, improve the working performance of the concrete mixture and improve the impermeability and frost resistance of the concrete. In practical engineering, especially in cold areas or in engineering with high demand on the impermeability of concrete, the performance of the concrete is often improved by compounding (i.e. adding polymer and air entraining agent simultaneously). Patent CN202110733570.1 discloses an anti-cracking, anti-seepage and self-repairing C35 mass concrete which comprises the following components in parts by weight: 200-290 parts of cement, 0-50 parts of mineral powder, 30-100 parts of fly ash, 0.1-0.3 part of air entraining agent, 700-850 parts of fine aggregate, 1000-1100 parts of coarse aggregate, 155-175 parts of water, 4-10 parts of retarding water reducer, 25-35 parts of anticracking agent and 5-10 parts of polyacrylate super absorbent resin. The additive in the patent is simply compounded, so that the compressive strength is reduced.
Compounding generally has several problems: (1) The polymer is unevenly dispersed, and is easy to agglomerate in the concrete to cause weak points, so that the performance of the concrete is reduced; (2) The air entraining agent has unstable effect, bubbles are easy to be combined and cracked in the process of concrete molding and curing, and the performance of the concrete is negatively influenced; (3) The polymer and the air entraining agent are various, the compatibility of the polymer and the air entraining agent is greatly influenced, the compounding effect is unstable, and the performance of the concrete is further influenced.
Therefore, there is a need to provide an improved multifunctional concrete admixture with both toughening and air entraining and foam stabilizing functions and a method for preparing the same, so as to solve the above problems.
Disclosure of Invention
The invention aims to provide a multifunctional concrete admixture with toughening, air entraining, foam stabilizing and the like, and a preparation method thereof, wherein the multifunctional concrete admixture with toughening, air entraining, foam stabilizing and the like is obtained through regulation and control of a preparation process, so that the dispersibility of the admixture in concrete is improved, the stability of the admixture is improved, and the performance of the concrete is ensured.
In order to achieve the above purpose, the invention provides a preparation method of a multifunctional concrete additive with toughening, air entraining and foam stabilizing functions, which comprises the following steps:
adding an emulsifying agent into water, heating to 35-45 ℃, then synchronously dripping a polymer monomer, an initiator and an aqueous solution containing a macromolecular tackifier and an air entraining agent, and stirring and reacting for 0.5-1.5 h; then heating to 60-70 ℃, continuously adding the rest polymer monomer and the initiator, continuously stirring and reacting for 3-4 h, and cooling to room temperature to obtain the multifunctional concrete additive (emulsion).
In the invention, macromolecular tackifier and air entraining agent are added in the emulsion polymerization process of polymer monomers, and the polymer monomers are added in batches, so that the macromolecular tackifier and the air entraining agent are uniformly dispersed in the obtained polymer emulsion to form the stable emulsion-like multifunctional concrete additive. The admixture has the functions of toughening, air entraining, foam stabilizing and the like, so that the dispersibility of the admixture in concrete can be improved, and the stability of the admixture can be improved. After the composite material is added into concrete, the effect of each substance can be exerted to the maximum extent, and the performance of the concrete is further improved.
Further, the multifunctional concrete admixture comprises, by weight, 100 parts of water, 90-110 parts of polymer monomers, 1-3 parts of initiators, 2-5 parts of emulsifying agents, 2-4 parts of macromolecular tackifiers and 1-3 parts of air entraining agents.
Further, the initial addition amount of the polymer monomer is 30-40% of the total amount of the polymer monomer; the initial addition amount of the initiator is 30-40% of the total amount of the initiator. The water content of the aqueous solution containing the macromolecular tackifier and the air entraining agent is 30-40% of the total water content. The polymer monomer is subjected to preliminary polymerization by adding part of the polymer monomer and the initiator, meanwhile, the macromolecular tackifier and the air entraining agent are dispersed and adsorbed on the surface of the polymer, and then the rest of the polymer monomer and the initiator are added for continuous polymerization, so that the macromolecular tackifier and the air entraining agent are uniformly dispersed in a gap of a polymer molecular chain, and the functions of toughening, air entraining, foam stabilizing and the like can be remarkably improved.
In some embodiments, adding the macromolecular tackifier into 1/3 of deionized water, heating to 90 ℃ and stirring until the macromolecular tackifier is completely dissolved, then adding the air entraining agent, stopping heating, and continuing stirring to room temperature to form solution 1; adding an emulsifying agent into the rest water, heating to 40 ℃ and uniformly stirring, then slowly dripping 1/3 of polymer monomer, an initiator and the solution 1, and continuously stirring for 0.5-1.5 h to form a solution 2; heating the solution 2 to 65 ℃, then slowly adding the rest polymer monomer and the initiator, continuously stirring for 3-4 h, and cooling to room temperature to obtain emulsion, namely the multifunctional concrete additive with toughening, air entraining and foam stabilizing functions.
Further, the polymer monomer comprises one or more of vinyl acetate, acrylamide monomer, acrylic monomer, butyl methacrylate, ethylene glycol dimethacrylate and hydroxyethyl methacrylate, preferably, the mass ratio of the vinyl acetate to the butyl methacrylate is (45-55): 1, more preferably, the mass ratio of the vinyl acetate to the butyl methacrylate is 50:1. The polymer produced by the two has high toughness and obvious toughening effect on concrete.
Further, the macromolecular tackifier comprises one or more of polyacrylamide, polyvinyl alcohol and fiber, preferably polyacrylamide.
Further, the air entraining agent comprises one or more of rosin resin, alkyl benzene sulfonate and fatty alcohol sulfonate, preferably sodium dodecyl benzene sulfonate.
Further, the initiator includes one or more of persulfate, sulfite, and peroxide. Ammonium persulfate is preferred, and the initiation conditions required are mild.
Further, the emulsifier comprises one or more of alkylbenzenesulfonic acid type emulsifier, polyalcohol type emulsifier and polyester type emulsifier. The preferable one is op-10 (dodecylphenol polyoxyethylene ether), which has good emulsification effect and good compatibility in concrete.
The invention also provides a multifunctional concrete additive with the functions of toughening, air entraining and foam stabilizing, which is prepared by the preparation method of any one of the above.
The invention also provides concrete which comprises a cementing material and the multifunctional concrete additive.
Further, the dosage of the multifunctional concrete additive is 0.01-0.1% of the mass of the cementing material; the cementing material comprises, by weight, 250-300 parts of cement, 60-85 parts of fly ash, 780-830 parts of sand, 980-1030 parts of stone, 140-170 parts of water and 6-10 parts of polycarboxylate water reducer.
The beneficial effects of the invention are as follows:
1. according to the preparation method of the multifunctional concrete admixture with the functions of toughening, air entraining, foam stabilizing and the like, provided by the invention, other admixture components are introduced during emulsion polymerization, so that the admixture has the functions of toughening, air entraining, foam stabilizing and the like, the dispersibility of the admixture in concrete can be improved, the stability of the admixture can be improved, and the performance of the concrete can be ensured.
2. The air entraining agent system is added in the emulsion polymerization process, so that the compatibility of the air entraining agent and the polymer can be increased, the dispersion uniformity of the air entraining agent is improved, the stability of bubbles can be further improved by the polymer emulsion, the toughness of the polymer structure can be improved by the air entraining agent system, and the co-promotion of the air entraining agent and the polymer is realized.
3. The polymer produced by emulsion polymerization has low viscosity, uniform dispersion, strong structural toughness and obvious toughening effect on concrete; the macromolecular tackifier can not only thicken and stabilize foam, but also improve the working performance of the concrete mixture.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A multifunctional concrete additive with toughening, air entraining and foam stabilizing functions comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer monomers (vinyl acetate: butyl methacrylate is 50:1), 2 parts of ammonium persulfate, 4 parts of op-10 parts of polyacrylamide, 4 parts of sodium dodecyl benzene sulfonate and 3 parts of sodium dodecyl benzene sulfonate. The preparation method comprises the following steps:
adding macromolecular tackifier polyacrylamide into 1/3 deionized water, heating to 90 ℃ and stirring until the macromolecular tackifier polyacrylamide is completely dissolved, then adding air entraining agent sodium dodecyl benzene sulfonate, stopping heating, and continuously stirring to room temperature to form solution 1; adding an emulsifier op-10 into the rest water, heating to 40 ℃ and uniformly stirring, then slowly dripping 1/3 of polymer monomer vinyl acetate and butyl methacrylate, initiator ammonium persulfate and solution 1, and continuously stirring for 1h to form solution 2; heating the solution 2 to 65 ℃, then slowly adding the rest polymer monomer and the initiator, continuously stirring for 3 hours, and cooling to room temperature to obtain emulsion, namely the multifunctional concrete additive with toughening, air entraining and foam stabilizing functions.
Adding the multifunctional concrete additive into concrete, wherein the concrete comprises the following components in parts by weight: 280 parts of cement, 73 parts of fly ash, 810 parts of sand, 1011 parts of stone, 158 parts of water, 8.6 parts of polycarboxylate superplasticizer and the mixing amount of the multifunctional additive is fixed to be 0.03% of the cementing material.
Example 2
A multifunctional concrete additive with toughening, air entraining and foam stabilizing functions comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer monomer (vinyl acetate), 2 parts of ammonium persulfate, 4 parts of polyacrylamide and 3 parts of sodium dodecyl benzene sulfonate.
The preparation method of the multifunctional concrete admixture and the composition of the concrete are the same as those of the embodiment 1, and are not repeated here.
Example 3
A multifunctional concrete additive with toughening, air entraining and foam stabilizing functions comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer monomer (vinyl acetate: butyl methacrylate is 50:1), 3 parts of hydrogen peroxide, 4 parts of op-10, 4 parts of polyvinyl alcohol and 3 parts of sodium dodecyl benzene sulfonate.
The preparation method of the multifunctional concrete admixture and the composition of the concrete are the same as those of the embodiment 1, and are not repeated here.
Example 4
A multifunctional concrete additive with toughening, air entraining and foam stabilizing functions comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer monomer (butyl methacrylate), 2 parts of ammonium persulfate, 4 parts of op-10, 4 parts of polyacrylamide and 3 parts of sodium dodecyl benzene sulfonate.
The preparation method of the multifunctional concrete admixture and the composition of the concrete are the same as those of the embodiment 1, and are not repeated here.
Example 5
A multifunctional concrete additive with toughening, air entraining and foam stabilizing functions comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer monomers (vinyl acetate: butyl methacrylate is 30:1), 2 parts of ammonium persulfate, 4 parts of op-10 parts of polyacrylamide, 4 parts of sodium dodecyl benzene sulfonate and 3 parts of sodium dodecyl benzene sulfonate.
The preparation method of the multifunctional concrete admixture and the composition of the concrete are the same as those of the embodiment 1, and are not repeated here.
Example 6
A multifunctional concrete additive with toughening, air entraining and foam stabilizing functions comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer monomers (vinyl acetate: butyl methacrylate is 50:1), 2 parts of ammonium persulfate, 4 parts of op-10 parts of polyacrylamide, 4 parts of sodium dodecyl benzene sulfonate and 3 parts of sodium dodecyl benzene sulfonate. The preparation method comprises the following steps:
adding macromolecular tackifier polyacrylamide into 2/3 deionized water, heating to 90 ℃ and stirring until the macromolecular tackifier polyacrylamide is completely dissolved, then adding air entraining agent sodium dodecyl benzene sulfonate, stopping heating, and continuously stirring to room temperature to form solution 1; adding an emulsifier op-10 into the rest water, heating to 40 ℃ and uniformly stirring, then slowly dripping 2/3 of polymer monomer vinyl acetate and butyl methacrylate, initiator ammonium persulfate and solution 1, and continuously stirring for 1h to form solution 2; heating the solution 2 to 65 ℃, then slowly adding the rest polymer monomer and the initiator, continuously stirring for 3 hours, and cooling to room temperature to obtain emulsion, namely the multifunctional concrete additive with toughening, air entraining and foam stabilizing functions.
Adding the multifunctional concrete additive into concrete, wherein the concrete comprises the following components in parts by weight: 280 parts of cement, 73 parts of fly ash, 810 parts of sand, 1011 parts of stone, 158 parts of water, 8.6 parts of polycarboxylate superplasticizer and the mixing amount of the multifunctional additive is fixed to be 0.03% of the cementing material.
Comparative example 1
A multifunctional concrete additive comprises the following components in parts by weight: 66 parts of deionized water, 90 parts of polymer monomer (vinyl acetate: butyl methacrylate is 50:1), 2 parts of ammonium persulfate and 4 parts of op-10. I.e. without the addition of macromolecular tackifiers and air entraining agents.
The composition of the concrete is the same as that of example 1, and will not be described again here.
Comparative example 2
A multifunctional concrete additive comprises the following components in parts by weight: 33 parts of deionized water, 4 parts of polyacrylamide and 3 parts of sodium dodecyl benzene sulfonate. I.e. without the addition of polymer monomers, emulsifiers and initiators.
The composition of the concrete is the same as that of example 1, and will not be described again here.
Comparative example 3
No additive. The concrete comprises the following components: 280 parts of cement, 73 parts of fly ash, 810 parts of sand, 1011 parts of stone, 158 parts of water and 8.6 parts of polycarboxylate superplasticizer.
Comparative example 4
The concrete comprises the following components in parts by weight: 280 parts of cement, 73 parts of fly ash, 810 parts of sand, 1011 parts of stone, 158 parts of water, 8.6 parts of polycarboxylate superplasticizer and the mixing amount of the multifunctional additive is fixed to be 0.03% of the cementing material. The multifunctional concrete additive comprises the following components in parts by weight: 100 parts of deionized water, 90 parts of polymer (polyvinyl acetate: polybutylmethacrylate is 50:1), 4 parts of op-10 parts of polyacrylamide, 4 parts of sodium dodecyl benzene sulfonate and 3 parts of sodium dodecyl benzene sulfonate. I.e. the polymer is added directly to the concrete together with air entraining agents etc.
The concrete performance test results are shown in the following table. As can be seen from examples 1-6, the multifunctional admixture prepared by the invention has no negative effect on the strength of concrete, reduces the air permeability coefficient of the concrete and improves the impermeability and frost resistance of the concrete. The polymer system is added in the comparative example 1, so that the internal cohesion is improved, and the impermeability and the frost resistance are correspondingly improved, compared with the comparative example 3, but compared with the examples 1-6, the air entraining agent system is not added in the comparative example 1, a large number of tiny bubbles are not formed in the concrete, so that the impermeability and the frost resistance are relatively poor; the addition of the air entraining agent system in comparative example 2 improves the impermeability and the frost resistance and at the same time significantly reduces the strength compared to comparative example 3, but comparative example 2 does not add a polymer system, and the cohesion of the concrete is poor compared to examples 1 to 6, so that the impermeability and the frost resistance are relatively poor; the permeation resistance and the freezing resistance of comparative example 4 are improved compared with those of comparative example 3, but the stability of the compound additive in comparative example 4 is found to be poor in the test, the deviation of the concrete test result is large, and the final effect is even inferior to that of comparative example 1 of a single-addition polymer system and comparative example 2 of a single-addition air entraining agent system.
Table 1 results of performance testing of examples and comparative examples
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The preparation method of the multifunctional concrete additive with the functions of toughening, air entraining and foam stabilizing is characterized by comprising the following steps of:
adding an emulsifying agent into water, heating to 35-45 ℃, then synchronously dripping a polymer monomer, an initiator and an aqueous solution containing a macromolecular tackifier and an air entraining agent, and stirring and reacting for 0.5-1.5 h; then heating to 60-70 ℃, continuously adding the rest polymer monomer and the initiator, continuously stirring and reacting for 3-4 h, and cooling to room temperature to obtain the multifunctional concrete additive.
2. The preparation method of the multifunctional concrete admixture with the functions of toughening, air entraining and foam stabilizing as claimed in claim 1, wherein the multifunctional concrete admixture is characterized in that the raw materials of the multifunctional concrete admixture meet the requirements of 100 parts by weight of water, 90-110 parts by weight of polymer monomers, 1-3 parts by weight of initiator, 2-5 parts by weight of emulsifier, 2-4 parts by weight of macromolecular tackifier and 1-3 parts by weight of air entraining agent.
3. The method for preparing the multifunctional concrete admixture with the functions of toughening, air entraining and foam stabilizing according to claim 2, wherein the initial addition amount of the polymer monomer is 30-40% of the total amount of the polymer monomer; the initial addition amount of the initiator is 30-40% of the total amount of the initiator;
and/or the water content of the aqueous solution containing the macromolecular tackifier and the air entraining agent is 30-40% of the total water content.
4. A method of preparing a multifunctional concrete admixture with both toughened bleed air and bubble stability as claimed in any one of claims 1 to 3 wherein the polymer monomer comprises one or more of vinyl acetate, acrylamide monomer, acrylic monomer, butyl methacrylate, ethylene glycol dimethacrylate and hydroxyethyl methacrylate.
5. The method for preparing the multifunctional concrete admixture with the functions of toughening, air entraining and foam stabilizing according to claim 4, wherein the polymer monomer is vinyl acetate and butyl methacrylate with the mass ratio of (45-55): 1.
6. A method for preparing a multifunctional concrete admixture with both toughening, air entraining and foam stabilizing functions according to any one of claims 1-3, wherein the macromolecular tackifier comprises one or more of polyacrylamide, polyvinyl alcohol and fiber, preferably polyacrylamide, so that the multifunctional concrete admixture not only can be used for tackifying and foam stabilizing, but also can be used for improving the working performance of the concrete admixture.
And/or the air entraining agent comprises one or more of rosin resin, alkyl benzene sulfonate and fatty alcohol sulfonate, preferably sodium dodecyl benzene sulfonate, and has mild foaming and uniform bubbles.
7. A method of preparing a multifunctional concrete admixture with both toughened bleed air and bubble stability as claimed in any one of claims 1 to 3 wherein the initiator comprises one or more of persulphate, sulphite and peroxide;
and/or the emulsifier comprises one or more of an alkylbenzenesulfonic acid type emulsifier, a polyol type emulsifier and a polyester type emulsifier.
8. A multifunctional concrete admixture with both toughening and air entraining and foam stabilizing functions, which is characterized by being prepared by the preparation method of any one of claims 1-7.
9. A concrete comprising a cementitious material and the multifunctional concrete admixture of claim 8.
10. The concrete according to claim 9, wherein the amount of the multifunctional concrete admixture is 0.01-0.1% of the mass of the cementing material;
and/or the cementing material comprises 250-300 parts of cement, 60-85 parts of fly ash, 780-830 parts of sand, 980-1030 parts of stone, 140-170 parts of water and 6-10 parts of polycarboxylate water reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311581201.0A CN117819863A (en) | 2023-11-24 | 2023-11-24 | Multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311581201.0A CN117819863A (en) | 2023-11-24 | 2023-11-24 | Multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117819863A true CN117819863A (en) | 2024-04-05 |
Family
ID=90506682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311581201.0A Pending CN117819863A (en) | 2023-11-24 | 2023-11-24 | Multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117819863A (en) |
-
2023
- 2023-11-24 CN CN202311581201.0A patent/CN117819863A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112724329A (en) | Viscosity-reducing polycarboxylic acid concrete water reducer and preparation method thereof | |
| CN109400821B (en) | Concrete bleeding-resistant inhibitor with water reducing function and preparation method thereof | |
| JPH11209154A (en) | Cement admixture, cement composition using the same and its preparation | |
| CN109369859B (en) | Concrete tackifying type viscosity regulator and preparation method thereof | |
| CN106008784B (en) | A kind of concrete thinner and preparation method thereof | |
| CN109880020B (en) | Concrete workability regulator and preparation method thereof | |
| CN111777722A (en) | Anti-mud slump-retaining polycarboxylate superplasticizer and preparation method thereof | |
| CN108821640B (en) | Concrete mortar anti-cracking additive and preparation method thereof | |
| CN115947560B (en) | Additive for improving workability of concrete and preparation method thereof | |
| US3250736A (en) | Latex modified cement mortar compositions | |
| CN114163577A (en) | Viscosity-reducing water reducer and preparation method and application thereof | |
| CN117089031B (en) | Organic-inorganic hybrid crosslinking type water-retaining agent and preparation method thereof | |
| CN113980197A (en) | High-performance anti-cracking shrinkage-reducing concrete water reducing agent and preparation method thereof | |
| CN104692703B (en) | Pump concrete foam stabilizer and preparation method thereof | |
| CN114920890B (en) | Viscosity-reducing additive and preparation method and application thereof | |
| CN117819863A (en) | Multifunctional concrete additive with toughening, air entraining and foam stabilizing functions and preparation method thereof | |
| CN112708040A (en) | Concrete reinforcing and toughening additive and preparation method thereof | |
| JP4118375B2 (en) | Cement admixture, cement composition using the same, and preparation method thereof | |
| CN112679675B (en) | Polycarboxylate superplasticizer and preparation method thereof | |
| CN113354782B (en) | Shrinkage-reducing polycarboxylate superplasticizer and preparation method thereof | |
| CN114751671A (en) | Preparation method of polycarboxylic acid admixture for machine-made sand high-strength concrete | |
| CN109535347B (en) | Preparation method of block water-retaining concrete admixture | |
| CN112521046A (en) | Slow-release concrete performance improver and preparation method thereof | |
| CN112574364A (en) | High slump loss resistant polycarboxylate superplasticizer and preparation method thereof | |
| CN114685085A (en) | Wet-mixed mortar additive 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 |