GB2615156A - Concrete laitance reinforcement, preparation method therefor, and application thereof - Google Patents
Concrete laitance reinforcement, preparation method therefor, and application thereof Download PDFInfo
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- GB2615156A GB2615156A GB2215541.0A GB202215541A GB2615156A GB 2615156 A GB2615156 A GB 2615156A GB 202215541 A GB202215541 A GB 202215541A GB 2615156 A GB2615156 A GB 2615156A
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- United Kingdom
- Prior art keywords
- reinforcement
- laitance
- concrete
- monomer
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 54
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 86
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000004593 Epoxy Substances 0.000 claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 34
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 32
- 229910000077 silane Inorganic materials 0.000 claims description 32
- 229920000578 graft copolymer Polymers 0.000 claims description 31
- SOGFHWHHBILCSX-UHFFFAOYSA-J prop-2-enoate silicon(4+) Chemical compound [Si+4].[O-]C(=O)C=C.[O-]C(=O)C=C.[O-]C(=O)C=C.[O-]C(=O)C=C SOGFHWHHBILCSX-UHFFFAOYSA-J 0.000 claims description 23
- 229910021529 ammonia Inorganic materials 0.000 claims description 17
- 238000006482 condensation reaction Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 13
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 10
- -1 alicyclic amine Chemical class 0.000 claims description 9
- 239000000839 emulsion Substances 0.000 claims description 8
- 108010009736 Protein Hydrolysates Proteins 0.000 claims description 7
- 239000000413 hydrolysate Substances 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920006295 polythiol Polymers 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 3
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 claims description 3
- NKLYMYLJOXIVFB-UHFFFAOYSA-N triethoxymethylsilane Chemical compound CCOC([SiH3])(OCC)OCC NKLYMYLJOXIVFB-UHFFFAOYSA-N 0.000 claims description 3
- UJTGYJODGVUOGO-UHFFFAOYSA-N diethoxy-methyl-propylsilane Chemical compound CCC[Si](C)(OCC)OCC UJTGYJODGVUOGO-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 claims description 2
- 229940048053 acrylate Drugs 0.000 claims 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 18
- 238000000576 coating method Methods 0.000 abstract description 18
- 239000000758 substrate Substances 0.000 abstract description 4
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 4
- 239000003973 paint Substances 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 239000011253 protective coating Substances 0.000 abstract description 3
- 238000009736 wetting Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 229920001002 functional polymer Polymers 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 15
- 238000005336 cracking Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 10
- 239000011229 interlayer Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- 239000012756 surface treatment agent Substances 0.000 description 4
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- TUQLLQQWSNWKCF-UHFFFAOYSA-N trimethoxymethylsilane Chemical compound COC([SiH3])(OC)OC TUQLLQQWSNWKCF-UHFFFAOYSA-N 0.000 description 2
- NJNFCDQQEIAOIF-UHFFFAOYSA-N 2-(3,4-dimethoxy-2-methylsulfanylphenyl)ethanamine Chemical compound COC1=CC=C(CCN)C(SC)=C1OC NJNFCDQQEIAOIF-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- CWAFVXWRGIEBPL-UHFFFAOYSA-N ethoxysilane Chemical compound CCO[SiH3] CWAFVXWRGIEBPL-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- DRRZZMBHJXLZRS-UHFFFAOYSA-N n-[3-[dimethoxy(methyl)silyl]propyl]cyclohexanamine Chemical compound CO[Si](C)(OC)CCCNC1CCCCC1 DRRZZMBHJXLZRS-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/64—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/10—Block or graft copolymers containing polysiloxane sequences
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
- C04B41/4922—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as monomers, i.e. as organosilanes RnSiX4-n, e.g. alkyltrialkoxysilane, dialkyldialkoxysilane
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
- C04B41/495—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as oligomers or polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/442—Block-or graft-polymers containing polysiloxane sequences containing vinyl polymer sequences
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
The present application relates to the technical field of functional polymer materials, and in particular, to a concrete laitance reinforcement, a preparation method therefor, and an application thereof. The concrete laitance reinforcement provided by the present application is a graft-copolymerized epoxy concrete laitance reinforcement containing a multifunctional group; a main agent is a submicron grafted multifunctional resin having a particle size of 0.05-0.25 μm; a silanol structural unit thereof has excellent permeability to laitance and the inside, and is coupled to surface OH to enhance the strength of a laitance substrate and improve the tensile cohesion strength of the laitance on the surface of concrete; a construction paint also has good strength when the laitance does not need to be polished completely in engineering application; the reinforcement has good wetting adhesion to a concrete substrate and a subsequent coating; and the adhesive force of a matched protective coating is greater than or equal to 1.5 MPa. Moreover, the reinforcement is cross-linked to obtain a thermosetting coating film, such that the heat resistance and temperature creep resistance of the reinforcement are improved, the heat resistance of the reinforcement is improved, and the temperature resistance requirement of the coating at 120°C for 200 h can be met.
Description
CONCRETE LAITANCE REINFORCEMENT, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to Chinese Patent Application No. 202111204874.5, entitled "concrete laitance reinforcement and preparation method therefor and use thereof', and filed to the China National Intellecniral Property Administration on October 15, 2021, the entire contents of which are incorporated herein by reference.
TECHNICAL FIELD
[0002] The present application belongs to the technical field of functional polymer material, and particularly relates to a concrete laitance reinforcement and preparation method therefor and use thereof co BACKGROUD [0003] Concrete laitance is a soft layer material that floats on the surface of a CO castable caused by bleeding as the cement hardens. The strength of the laitance is C\I much lower than the concrete body. In order to ensure the construction coating on the concrete surface having a good adhesion in engineering applications, it is necessary to polish the laitance until cleanliness. The work of polishing laitance has high intensity and low efficiency, which greatly reduces the efficiency of coating construction. In order to reduce the amount of polishing laitance, or even construction coating without polishing, it is a common solution to use concrete surface treatment agents or interface agents to treat and strengthen the concrete laitance.
[0004] In the prior art, thermoplastic copolymer emulsions or slime surface treatment agents are generally used for treating the concrete surface. Silane can penetrate the surface of the laitance structure and penetrate into the interior of the 30 concrete to make the laitance more dense and the cohesion strength of the laitance and the concrete body enhanced; the copolymer emulsion has an excellent permeability and can fully infiltrate the surface of the base material of wall, which makes the base dense through glue combination, improves the adhesion between the interface and increases the bonding strength of the wall surface.
[0005] However, after treating with silane surface treatment agent, the concrete surface is hydrophobic, which reduces the interlayer wetting ability of the subsequent coating and makes the subsequent coating prone to poor adhesion, and the interlayer adhesion is < 1.5MPa; while the copolymer emulsion is thermoplastic and its heat resistance is poor. So the change of high and low temperature will cause temperature creep shrinkage, which does not meet the use requirements of some high temperature resistant conditions. For example, the coating used in the field of nuclear protection requires a temperature resistance of 120 °C.
CO
C\II 5 SUMMARY
CO [0006] Therefore, the technical problem to be solved by the present application is to overcome the defects in prior art that concrete surface treatment agents have Cr) low interlayer adhesion, low heat resistance and so on, thereby providing a concrete laitance reinforcement and preparation method therefor and use thereof [0007] For this purpose, the present application provides the following technical solutions: [0008] The present application provides a concrete laitance reinforcement, comprising 75-80 parts by mass of a main agent and 20-25 parts by mass of a curing agent.
[0009] The main agent comprises structural units of an epoxy silane monomer, a silanol monomers, and a silicon-acrylate graft copolymer.
[0010] Optionally, the mass ratio of the epoxy silane monomer, the silanol monomer, and the silicon-acrylate graft copolymer is (8-30) : (5-20):100.
[0011] Optionally, the silanol monomer is at least one of vinyltrimethoxysilane 30 hydrolysate, vinyltriethoxysi lane hydrolysate, trimethoxymethylsilane hydrolysate and triethoxym ethyl silane hydrolysate.
[0012] Optionally, the silicon-acrylate graft copolymer is an organosilicon acrylate graft copolymer emulsion, which can be a commercially available product or can be obtained by self-made.
[0013] Optionally, the silicone-acrylate graft copolymer comprises 0.4-2.5wt% of an organosilicon functional monomer, optionally 0.5-1.3wt%.
[0014] Optionally, the organosilicon acrylate graft copolymer emulsion has a particle size of 0.03-0.2 tim, optionally 0.05-0.15 tim.
[0015] Optionally, the organosilicon acrylate graft copolymer emulsion has a 10 minimum film forming temperature (MET) of 20-30°C.
[0016] Optionally, the epoxy silane monomer i s at least one of y-(2,3 -epoxypropoxy)propyl tri m eth oxysi lane, y-(2,3-epoxypropoxy)propyltriethoxysilane, CO y-(2,3-epoxypropoxy)propylmethyldimethoxysilane, r(2,3-epoxypropoxy) C\115 propylmethyldiethoxysilane, 0-(3,4-epoxycyclohexyl)ethyltrimethoxysilane,
CO
13-(3,4-epoxycyclohexyl)ethyltriethoxysilane.
Cr) [0017] Optionally, the curing agent is at least one of alicyclic amine curing agent, C\I polyamide curing agent, phenolic aldehyde amine curing agent or polythiol curing agent.
[0018] The specific selection of the curing agent can be conventional commercial products, for example, the alicyclic amine is Beckocure EH623W or Beckocure EH659W.
[0019] The polyamide is Aradur435 or Aradur340.
[0020] The phenolic aldehyde amine is 5034W.
[0021] The polythiol is QE-340M, Thioplast 04 or GL1830.
[0022] The present application also provides a preparation method of the above concrete laitance reinforcement, comprising the following steps of [0023] mixing the silicon-acrylate graft copolymer, silanol monomer, and epoxy silane monomer with water, and performing condensation reaction at 50-65°C for 30 1-2h to obtain the main agent; [0024] packing the main agent and the curing agent separately in proportion to obtain the concrete laitance reinforcement.
[0025] Optionally, the mass ratio of the silicon-acrylate graft copolymer, the silanol monomer, the epoxy silane monomer to water is 100:(5 -20):(8-30):(50-70).
[0026] Optionally, the preparation method of the silanol monomer is of: heating a solvent to 55-65°C, adding silane dropwise with stirring, controlling the dropping time of silane is 3-4h, and keeping the temperature at 60-65°C for 3-4h to obtain the silanol monomer.
[0027] Optionally, the solvent is a mixture of ethanol, water and ammonia, and the mass ratio of the ethanol, water and ammonia is (20-35):(80-65):(0.08-0.2); [0028] Optionally, the mass ratio of the solvent to silane is 10: (1 -5).
[0029] Specifically, the preparation method of the silanol monomer is of adding CO metered ethanol/water/ammonia (20-35/80-65/0.08-0.2) into a reactor with stirring, NI 5 thermocouple and dripping device, heating the reactor to 55-65°C, and then
CO
adding silane dropwise and controlling the material to be added to the reactor CO within 3-4 hours, and keeping the temperature at 60-65°C for 3-4h to obtain a C\I silanol sol.
[0030] The present application also provides use of the concrete laitance reinforcement or the concrete laitance reinforcement prepared by the preparation method, wherein the main agent and curing agent are mixed evenly in proportion and coated on the concrete surface and then cured at room temperature during construction [0031] The technical solution of the present application has the following 25 advantages: [0032] The concrete laitance reinforcement provided by the present application comprises 75-80 parts by mass of a main agent and 20-25 parts by mass of a curing agent; wherein the main agent comprises structural units of an epoxy slime monomer, a silanol monomer, and a silicon-acrylate graft copolymer. The concrete laitance reinforcement of the present application is a graft copolymerization epoxy concrete laitance reinforcement containing polyfunctional groups, wherein the main agent is submicron grafted multifunctional resin having a particle size of 0.05-0.2 [tm, a silanol structural unit of the main agent has excellent permeability to the laitance and the interior of the concrete, which is coupled with OH on the surface to enhance the strength of a laitance substrate and improve the tensile cohesion strength of the concrete laitance on the surface, the construction coating also has a good strength when the laitance does not need to be polished in engineering application, the reinforcement has a good wetting adhesiveness to the concrete substrate and a subsequent coating, the adhesive force of the matched protective coating is > 1.5 MPa, meanwhile, the reinforcement is a thermosetting coating film obtained through crosslinking the main agent with the curing agent, which improves the heat resistance, temperature creep resistance and the resistance to heat of the reinforcement, and can meet the coating temperature CO resistance requirement of at 120 °C for 200 h. NI 5 [0033] The concrete laitance reinforcement provided by the present application,
CO
wherein the silanol monomer is at least one of vinyltrimethoxysilane hydrolysate, CO vinyltriethoxysilane hydrolysate, trimethoxymethylsilane hydrolysate and C\I triethoxymethylsilane hydrolysate. The hydrolysate has the advantages of large penetration depth to the laitance and good wettability to the laitance, which can 20 strengthen the cohesive strength of the laitance.
[0034] The concrete laitance reinforcement provided by the present application has the advantages of increasing the adhesion between the laitance and the subsequent coating, forming a thermosetting paint film and increasing the heat resistance by further defining the epoxy silane monomer and the silicon-acrylate graft copolymer.
[0035] The concrete laitance reinforcement provided by the present application, wherein the curing agent is at least one of ali cyclic amine curing agent, polyamide curing agent, phenolic aldehyde amine curing agent or polythiol curing agent. The present application uses amine or thiol curing main agent to form a cross-linked thermosetting coating film, improve the heat resistance and temperature creep resistance of the treatment agent, and meet the use requirements under high temperature conditions of at 120 °C for 200 h (GB/T1735) , which further improve the heat resistance of the reinforcement.
[0036] The use of the concrete laitance reinforcement provided by the present 5 application, in practical engineering applications, the laitance does not need to be polished to cleanness or even to be polished. The reinforcement is easy to use, spraying or roller coating on the concrete surface and curing at room temperature. The construction material also has good strength, so that the adhesion of the matched protective coating is > 1.5 Nifia (GB/T5210) to meet the use 10 requirements under high temperature at 120°Cfor 200h (GB/T1735).
DETAILED DESCRIPTION
[0037] The following embodiments are provided for a better understanding of the Cr) present application, but the application is not limited to embodiments, and such NI 5 embodiments do not limit the content and protection scope of the present CO application. Any product identical or similar to the present application obtained by Cr) combining with the features of other prior art shall fall within the protection scope C\I of the present application.
[0038] If the specific experimental steps or conditions are not indicated in the embodiments, it can be carried out according to the operations or conditions of the conventional experimental steps recited in the references in the art. The agents or instruments used without indicating manufacturers are all conventional agent products that can be obtained from the market.
[0039] Embodiment 1 [0040] The present embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0041] Preparation of sil anol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl 30 trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.5h after dropping to obtain a silanol sol, which is a silanol monomer.
[0042] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), lOg of silanol monomer and 20g of epoxy silane monomer of 5 y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 65g of water, and performing a condensation reaction at 62°C for 1.5h to obtain a main agent; [0043] 77g of main agent and 23g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0044] Embodiment 2 [0045] The present embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0046] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and CO dripping device, heating the reactor to 60°C, and adding 25g of vinyl NI 5 trimethoxysilane dropwise and controlling the material to be added to the reactor
CO
within 3 5h and the temperature at 65°C, and keeping the temperature at 65°C for Cr) 3.5h after dropping to obtain a silanol sol.
C\I [0047] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), 15g of silanol monomer and 25g of epoxy silane monomer of 20 7-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 55g of water, and performing a condensation reaction at 60°C for 2h to obtain a main agent; [0048] 78g of main agent and 22g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0049] Embodiment 3 [0050] The present embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0051] Preparation of silanol monomer: adding 1 00g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl 30 trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 4h after dropping to obtain a silanol sol.
[0052] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), 5g of silanol monomer and 30g of epoxy silane monomer of 5 y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 70g of water, and performing a condensation reaction at 50°C for 2h to obtain a main agent; [0053] 75g of main agent and 25g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0054] Embodiment 4 [0055] The present embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0056] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and CO dripping device, heating the reactor to 65°C, and adding 25g of vinyl NI 5 trimethoxysilane dropwise and controlling the material to be added to the reactor
CO
within 4h and the temperature at 65°C, and keeping the temperature at 65°C for CO 3.0h after dropping to obtain a silanol sol.
C\I [0057] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), 20g of silanol monomer and 8g of epoxy silane monomer of 20 y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 50g of water, and performing a condensation reaction at 65°C for lh to obtain a main agent; [0058] 80g of main agent and 20g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0059] Embodiment 5 [0060] The present embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0061] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), 1 Og of silanol monomer (Bindzil CC30) and 20g of epoxy silane monomer of y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 65g of water, and 30 performing a condensation reaction at 60°C for 1.5h to obtain a main agent; [0062] 77g of main agent and 23g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0063] Embodiment 6 [0064] The present embodiment provides a preparation method of a concrete 5 reinforcement, and the specific preparation method is as follows: [0065] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 60°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.011 after dropping to obtain a silanol sol.
[0066] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), lOg of silanol monomer and 20g of epoxy silane monomer of CO y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 65g of water, and NI 5 performing a condensation reaction at 62°C for 1.5h to obtain a main agent;
CO
[0067] 77g of main agent and 23g of curing agent (Aradur435) are packed CO separately in proportion to obtain a concrete laitance reinforcement.
C\I [0068] Embodiment 7 [0069] The present embodiment provides a preparation method of a concrete 20 reinforcement, and the specific preparation method is as follows: [0070] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.5h after dropping to obtain a silanol sol.
[0071] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), 1 Og of silanol monomer and 20g of epoxy silane monomer of y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 65g of water, and 30 performing a condensation reaction at 62°C for 1.5h to obtain a main agent; [0072] packing 77g of main agent and 23g of curing agent (Beckocure EH623W) separately in proportion to obtain a concrete laitance reinforcement.
[0073] Embodiment 8 [0074] The present embodiment provides a preparation method of a concrete 5 reinforcement, and the specific preparation method is as follows: [0075] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.5h after dropping to obtain a silanol sol.
[0076] 100g of silicon-acrylate graft copolymer (BLJ KD96, MFT22°C), 1 Og of silanol monomer and 20g of epoxy silane monomer of CO y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 65g of water, and NI 5 performing a condensation reaction at 62°C for 1.5h to obtain a main agent;
CO
[0077] 77g of main agent and 23g of curing agent (Beckocure EH623W) are Cr) packed separately in proportion to obtain a concrete laitance reinforcement.
C\I [0078] Embodiment 9 [0079] The present embodiment provides a preparation method of a concrete 20 reinforcement, and the specific preparation method is as follows: [0080] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.5h after dropping to obtain a silanol sol.
[0081] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), 1 Og of silanol monomer and 20g of epoxy silane monomer of y-(2,3-epoxypropoxy)propyltriethoxysilane are mixed with 65g of water, and 30 performing a condensation reaction at 62°C for 1.5h to obtain a main agent; [0082] 77g of main agent and 23g of curing agent (Seckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0083] Embodiment 10 [0084] The present embodiment provides a preparation method of a concrete 5 reinforcement, and the specific preparation method is as follows: [0085] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.5h after dropping to obtain a silanol sol.
[0086] 100g of silicon-acrylate graft copolymer (BATE RS-7801, MFT16°C, particle size 0.2-0.3gm), lOg of silanol monomer and 20g of epoxy silane CO monomer of y-(2,3-epoxypropoxy)propyltrimethoxysilane are mixed with 65g of NI 5 water, and performing a condensation reaction at 65°C for 1.5h to obtain a main
CO
agent; Cr) [0087] 75g of main agent and 25g of curing agent (Beckocure EH623W) are C\I packed separately in proportion to obtain a concrete laitance reinforcement.
[0088] Comparative Embodiment 1 [0089] The present comparative embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0090] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.511 after dropping to obtain a silanol sol.
[0091] 100g of styrene-acrylic copolymer (Primal DC-420, MFT29°C), lOg of silanol monomer and 20g of epoxy silane monomer of y-(2,3-epoxypropoxy) 30 propyltrimethoxysilane are mixed with 65g of water, and performing a condensation reaction at 62°C for 1.5h to obtain a main agent; [0092] 77g of main agent and 23g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[0093] Comparative Embodiment 2 [0094] The present comparative embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [0095] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of tetraethyl orthosilicate dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.511 after dropping to obtain a silanol sol.
[0096] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), lOg of Cr) silanol monomer and 20g of epoxy silane monomer of y-(2,3-epoxypropoxy) NI 5 propyltrimethoxysilane are mixed with 65g of water, and performing a
CO
condensation reaction at 62°C for 1.5h to obtain a main agent; Cr) [0097] 77g of main agent and 23g of curing agent (Beckocure EH623W) are C\I packed separately in proportion to obtain a concrete laitance reinforcement.
[0098] Comparative Embodiment 3 [0099] The present comparative embodiment provides a preparation method of a concrete reinforcement, and the specific preparation method is as follows: [00100] Preparation of silanol monomer: adding 100g of ethanol/water/ammonia (with a mass ratio of 30/70/0.1) into a reactor with stirring, thermocouple and dripping device, heating the reactor to 55°C, and adding 30g of vinyl trimethoxysilane dropwise and controlling the material to be added to the reactor within 3h and the temperature at 60°C, and keeping the temperature at 60°C for 3.511 after dropping to obtain a silanol sol.
[00101] 100g of silicon-acrylate graft copolymer (RS-996KD, MFT22°C), lOg of silanol monomer and 20g of epoxy silane monomer of y-(2,3-epoxypropoxy) 30 propyltrimethoxysilane are mixed with 65g of water, and performing a condensation reaction at 62°C for 1.5h to obtain a main agent; [00102] 70g of main agent and 30g of curing agent (Beckocure EH623W) are packed separately in proportion to obtain a concrete laitance reinforcement.
[00103] Experimental Embodiment [00104] The particle size of the main agent of the concrete laitance reinforcement prepared in the embodiments and the comparative embodiments of the present application is measured by using a BT-9300ST laser particle size distribution analyzer. The specific composition of the concrete is GB8076 benchmark concrete pouring block (70x70x2Omm), which is cured for 28 days as required. After the surface contaminant is simply removed with 50 mesh sandpaper on the surface of the concrete block, the reinforcement is sprayed on its surface with a spraying amount of 50g/square meter. Then the subsequent coating is sprayed with a spraying amount of 250g/square meter, and the subsequent coating is composed of CO two-component water-based epoxy coating. After curing at room temperature for NI 5 14 days, the interlayer adhesion is tested according to GB/T5210, and the
CO
temperature resistance (120°C, 200h) performance is tested according to Cr) GB/T1735. The specific test results are as follows: C\1
Table 1
particle size of interlayer adhesion /MPa temperature resistance performance main agent /D90 (120°C, 200h) Embodiment 1 0.2 3 1.95 cracking level scaling level 0 0, blistering level 0, Embodiment, .. 0 20 1 80 cracking level scaling level 0 0, blistering level 0, Embodiment 0. 17 205 cracking level scaling level 0 0, blistering level 0, Embodiment.. 0 24 2 00 cracking level scaling level 0 0, blistering level 0, Embodiment 0. 13 1. 45 cracking level scaling level 0 0, blistering level 0, CO C\I
CD
CO C\1 Embodiment 0.20 1.90 cracking level scaling level 0 0, blistering level 0, Embodiment 0.15 2.05 cracking level scaling level 0 0, blistering level 0, Embodiment 0.10 1.70 cracking level scaling level 0 0, blistering level 0, Embodiment 0.18 1.90 cracking level scaling level 0 0, blistering level 0, Embodiment 0.25 1.85 cracking level scaling level 0 I, blistering level 1, Comparative Embodiment 0.35 1.60 cracking level scaling level 0 1, blistering level 2, Comparative Embodiment 0.30 1.40 cracking level scaling level 1 I, blistering level 0, Comparative Embodiment 0.18 1.90 cracking level scaling level 0 1, blistering level 1, [00105] It can be seen from the data in the table that the graft copolymerization epoxy concrete laitance reinforcement containing polyfunctional groups protected by the present application can penetrate into the laitance on the simply polished 5 concrete surface, improve the strength of the laitance layer, and make its produces good adhesion (>1.5MPa) with the subsequent coating and temperature resistance performance (120°C, 200h, paint film has a cracking level 0, blistering level 0, and scaling level 0).
[00106] Obviously, the above-mentioned embodiments are only examples for clear 1 0 description, and are not intended to limit the implementation manner. For those skilled in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementation manners here. However, the obvious changes or modifications derived from this are still within the protection scope of the present application.
CO C\I
CD
CO C\1
Claims (2)
- WHAT IS CLAIMED IS: 1. A concrete laitance reinforcement, comprising 75-80 parts by mass of a main agent and 20-25 parts by mass of a curing agent, wherein the main agent comprises an epoxy silane monomer, a silanol monomer, and a sili con-acryl ate graft copolymer, the silanol monomer is at least one of vinyltrimethoxysilane hydrolysate, vinyltriethoxysilane hydrolysate, tri meth oxym ethyl silane hydrolysate and tri ethoxym ethyl sil ane hydrolysate, the silicon-acrylate graft copolymer is an organosilicon acrylate graft copolymer emulsion having a particle size of 0.03-0.2 utm, and a minimum film forming temperature (MET) of 20-30°C.
- 2. The concrete laitance reinforcement according to claim 1, wherein the mass ratio of the epoxy silane monomer, the silanol monomer, and the silicon-acrylate graft copolymer is (8-30) : (520) : 100. Cr)graft copolymer comprises 0.4-2.5wt% of an organosilicon functional monomer.CC) 4. The concrete laitance reinforcement according to claim 1 or 2, wherein the silicone-acrylate grail copolymer comprises 0.5-1.3wt% of an organosilicon functional monomer; Cr) the organosilicon acrylate graft copolymer emulsion has a particle size of 0.05-0.15 um. C\I5. The concrete laitance reinforcement according to claim I or 2, wherein the epoxy silane monomer is at least one of y-(2,3-epoxypropoxy)propyltrimethoxysilane, y-(2,3 -epoxypropoxy)propyltri ethoxy sil ane, y-(2,3 -epoxypropoxy)propyl m ethyl di m eth oxysilan e, 7-(2,3 -epoxypropoxy) propylmethyldiethoxysilane, f343,4-epoxycyclohexypethyltrimethoxysilane, f3-(3,4-epoxycyclohexyl)ethyltriethoxy silane 6. The concrete laitance reinforcement according to claim 1 or 2, wherein the curing agent is at least one of alicyclic amine curing agent, polyamide curing agent, phenolic aldehyde amine curing agent or polythiol curing agent.7. A preparation method of the concrete laitance reinforcement of any one of claims 1-6, comprising the following steps of: mixing the silicon-acrylate graft copolymer, silanol monomers, and epoxy silane monomer with 3. The concrete laitance reinforcement according to claim 1 or 2, wherein the silicone-acrylate water, and performing condensation reaction at 50-65°C for 1-2h to obtain the main agent; packing the main agent and the curing agent separately in proportion to obtain the concrete laitance reinforcement 8. The preparation method according to claim 7, wherein the mass ratio of the silicon-acrylate graft copolymers, the silanol monomer, the epoxy silane monomer to water is 100:(5 -20): (8-30): (50-70).9. The preparation method of the concrete laitance reinforcement according to claim 7, wherein the preparation method of the silanol monomers is of: heating a solvent to 55-65°C, adding silane dropwise with stirring, controlling the dropping time of silane is 3-4h, and keeping the temperature at 60-65°C for 3-4h to obtain the silanol monomer.The preparation method of the concrete laitance reinforcement according to claim 9, wherein the solvent is a mixture of ethanol, water and ammonia, and the mass ratio of the ethanol, water and ammonia is (20-35):(80-65):(0.08-0.2).11. Use of the concrete laitance reinforcement of any one of claims 1-6 or the concrete laitance CO reinforcement prepared by the preparation method of claims 7-10, wherein the main agent and curing agent are mixed evenly in proportion and coated on the concrete surface and then cured CID at room temperature during construction.CO C\I
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| PCT/CN2022/114462 WO2023061056A1 (en) | 2021-10-15 | 2022-08-24 | Concrete laitance reinforcement, preparation method therefor, and application thereof |
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| CN108276936A (en) * | 2018-01-24 | 2018-07-13 | 广州集泰化工股份有限公司 | A kind of fluid sealant primary coat liquid and the preparation method and application thereof |
| US20190002349A1 (en) * | 2017-06-28 | 2019-01-03 | Gcp Applied Technologies Inc. | Early strength enhancing concrete admixture |
| CN113831839A (en) * | 2021-10-15 | 2021-12-24 | 信和新材料（苏州）有限公司 | Concrete laitance reinforcer and preparation method and application thereof |
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- 2022-08-24 GB GB2215541.0A patent/GB2615156A/en active Pending
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| CN101982512A (en) * | 2010-09-21 | 2011-03-02 | 常州大学 | Silicone acrylate coating resin and preparation method thereof |
| CN105712657A (en) * | 2015-12-25 | 2016-06-29 | 江苏苏博特新材料股份有限公司 | Cement concrete internal-doping type water-based enhancer |
| US20170327422A1 (en) * | 2016-05-12 | 2017-11-16 | Evonik Degussa Gmbh | Use of aqueous emulsions based on propylethoxysilane oligomers as an additive in hydraulically setting cement compositions for reduction of shrinkage characteristics |
| US20190002349A1 (en) * | 2017-06-28 | 2019-01-03 | Gcp Applied Technologies Inc. | Early strength enhancing concrete admixture |
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