CN109231935B - Method for quickly maintaining polymer quick-hardening cement mortar and waterproof coiled material concrete protective layer - Google Patents
Method for quickly maintaining polymer quick-hardening cement mortar and waterproof coiled material concrete protective layer Download PDFInfo
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- CN109231935B CN109231935B CN201811212033.7A CN201811212033A CN109231935B CN 109231935 B CN109231935 B CN 109231935B CN 201811212033 A CN201811212033 A CN 201811212033A CN 109231935 B CN109231935 B CN 109231935B
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- cement
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- 239000004567 concrete Substances 0.000 title claims abstract description 87
- 229920000642 polymer Polymers 0.000 title claims abstract description 81
- 239000011083 cement mortar Substances 0.000 title claims abstract description 68
- 239000000463 material Substances 0.000 title claims abstract description 42
- 239000011241 protective layer Substances 0.000 title claims description 44
- 238000000034 method Methods 0.000 title claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000004568 cement Substances 0.000 claims abstract description 52
- 239000000839 emulsion Substances 0.000 claims abstract description 44
- 239000004576 sand Substances 0.000 claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 18
- 230000008439 repair process Effects 0.000 claims abstract description 18
- 239000006254 rheological additive Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000013530 defoamer Substances 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 46
- 239000004570 mortar (masonry) Substances 0.000 claims description 31
- 239000010410 layer Substances 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 18
- 230000015271 coagulation Effects 0.000 claims description 18
- 238000005345 coagulation Methods 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 11
- 239000002518 antifoaming agent Substances 0.000 claims description 9
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 9
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 9
- KDJNNYXXPNIWGP-UHFFFAOYSA-N 2-methylprop-1-ene triethoxysilane Chemical compound C(C)O[SiH](OCC)OCC.C=C(C)C KDJNNYXXPNIWGP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 8
- 229910052934 alunite Inorganic materials 0.000 claims description 8
- 239000010424 alunite Substances 0.000 claims description 8
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 7
- 239000006028 limestone Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 5
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 5
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 5
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- 229910021538 borax Inorganic materials 0.000 claims description 4
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 4
- 239000004328 sodium tetraborate Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 229920000881 Modified starch Polymers 0.000 claims description 2
- 239000004368 Modified starch Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 235000019426 modified starch Nutrition 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 36
- 230000000052 comparative effect Effects 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 11
- 239000000701 coagulant Substances 0.000 description 7
- 239000011433 polymer cement mortar Substances 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 229920002050 silicone resin Polymers 0.000 description 6
- 239000002174 Styrene-butadiene Substances 0.000 description 5
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 5
- 239000011115 styrene butadiene Substances 0.000 description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 description 5
- 229910000323 aluminium silicate Inorganic materials 0.000 description 4
- 229920003086 cellulose ether Polymers 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- 239000004588 polyurethane sealant Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 150000002790 naphthalenes Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 235000010338 boric acid Nutrition 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 235000015165 citric acid Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000000176 sodium gluconate Substances 0.000 description 2
- 235000012207 sodium gluconate Nutrition 0.000 description 2
- 229940005574 sodium gluconate Drugs 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011975 tartaric acid Substances 0.000 description 2
- 235000002906 tartaric acid Nutrition 0.000 description 2
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001147416 Ursus maritimus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 125000001905 inorganic group Chemical group 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- -1 isobutylene triethoxy silicon Chemical compound 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004587 polysulfide sealant Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 235000011127 sodium aluminium sulphate Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 description 1
- HXOGQBSDPSMHJK-UHFFFAOYSA-N triethoxy(6-methylheptyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCCCC(C)C HXOGQBSDPSMHJK-UHFFFAOYSA-N 0.000 description 1
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides polymer quick-hardening cement mortar which comprises the following components in parts by weight: 0.95-0.99 part of cement, 0.01-0.05 part of cement expansion mixture, 0.35-1.4 parts of polymer emulsion, 0.01-0.06 part of silane coupling agent, 1.5-2 parts of sand, 0.001-0.005 part of pour regulator, 0.0004-0.01 part of defoamer, 0-0.02 part of water reducer, 0-0.001 part of rheological modifier and 0-0.3 part of water; wherein the total mass number of the cement and the cement expansive mixing material is 1 part. The invention also provides a preparation method of the polymer quick-hardening cement mortar and application of the polymer quick-hardening cement mortar in quick rush repair of a waterproof system between railway concrete bridge deck lines.
Description
Technical Field
The invention belongs to the technical field of building waterproofing, and particularly relates to a quick maintenance method for a concrete protective layer of a ballastless track bridge deck waterproof coiled material and polymer quick-hardening cement mortar adopted by the method.
Background
A railway concrete bridge deck waterproof system is an important technical means for improving the durability of a bridge structure. The existing bridge can cause the water seepage of a bridge deck and the corrosion of reinforcing steel bars due to the waterproof failure of the bridge deck, and the service life of the bridge and the driving safety of a train are directly influenced.
Traditionally, the inter-line waterproof system of the railway concrete bridge deck (i.e. the waterproof system between the rails on the upper and lower rows of the deck) adopts a waterproof coil layer which is laid first, and then concrete with a certain thickness is poured as a protective layer. At present, some high-speed ballastless tracks still adopt a waterproof system of waterproof coiled materials and protective layers. For example, the Chinese patent application for 'waterproof closed system for high-speed railway bridge deck in severe cold region and construction method thereof' (publication No. CN108149569A, published as 2018, 1 month and 25 days) discloses a line-to-line waterproof system for high-speed railway bridge deck in severe cold region, which comprises a waterproof coil layer and a fiber concrete protective layer.
Before the railway is speeded up, because all road networks adopt ballast tracks, and the protective layer is covered with the railway ballasts, the state of the waterproof layer of the whole railway concrete bridge deck in the using process is not concerned. However, for ballastless tracks, the above-mentioned conventional waterproofing systems between bridge deck lines soon revealed problems: the defects of pulverization, block falling, arching and the like of a concrete protective layer appear in a short time of two to three years in a local road section, particularly in a severe cold area. The analysis reason may be that the repeated freezing and thawing of the fiber concrete protective layer in the alpine region due to the severe temperature change destroys the concrete structure, so that the concrete is disintegrated and broken. Broken concrete is easily sucked into the bottom of a carriage by a high-speed running high-speed rail to damage the bottom of the carriage or is sucked into a line, so that the rail surface is not smooth, and the driving safety is influenced. Therefore, once the concrete protective layer of the waterproof system of the bridge deck of the railway bridge is found to be damaged, the repair must be carried out immediately so as not to affect the ascending and descending trains.
Compared with the ordinary speed railway, the high-speed railway has the characteristics of long operation time and short maintenance skylight. Therefore, there is a need to develop a method for rapidly repairing a concrete protective layer of a waterproof roll between deck lines of a concrete bridge of a high-speed railway and a corresponding repairing material.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a polymer quick-hardening cement mortar and a method for quickly repairing a concrete protective layer of a waterproof roll using the same. The polymer quick-hardening cement mortar can realize quick solidification, and particularly can ensure that maintenance is finished in a skylight period in a high and cold area with low environmental temperature, and the smooth line operation and the running safety of a train are ensured.
For realizing the technical effects, the invention adopts the following technical scheme:
the polymer quick-hardening cement mortar comprises the following components in parts by weight: 0.95-0.99 part of cement, 0.01-0.05 part of cement expansion mixture, 0.35-1.4 parts of polymer emulsion, 0.01-0.06 part of silane coupling agent, 1.5-2 parts of sand, 0.001-0.005 part of pour regulator, 0.0004-0.01 part of defoamer, 0-0.02 part of water reducer, 0-0.001 part of rheological modifier and 0-0.3 part of water; wherein the total mass number of the cement and the cement expansive mixing material is 1 part.
Preferably, the polymer rapid hardening cement mortar comprises the following components in parts by weight:
0.97 to 0.99 part of cement, 0.01 to 0.03 part of cement expansion mixture, 0.4 to 0.6 part of polymer emulsion, 0.02 to 0.05 part of silane coupling agent, 1.5 to 2 parts of sand, 0.001 to 0.004 part of pour regulator, 0.0004 to 0.005 part of defoamer, 0 to 0.01 part of water reducer, 0 to 0.0008 part of rheological modifier and 0 to 0.25 part of water; wherein the total mass portion of the cement and the cement expansion mixed material is 1 portion.
More preferably, the polymer rapid hardening cement mortar comprises the following components in parts by weight:
0.99 part of cement, 0.01 part of cement expansion mixture, 0.5 part of polymer emulsion, 0.03 part of silane coupling agent, 2 parts of sand, 0.001-0.004 part of pour regulator, 0.001 part of defoamer, 0.003-0.005 part of water reducer, 0.0004-0.0007 part of rheology modifier and 0.15-0.2 part of water; wherein the total mass portion of the cement and the cement expansion mixed material is 1 portion.
Preferably, the set retarder consists of one or two of a set accelerator and a set retarder; when the construction temperature is 5-15 ℃, the mass part of the coagulation regulator is 0.002-0.003, and the coagulation regulator is selected from coagulation accelerators; when the construction temperature is 15-27 ℃, the mass part of the coagulation regulator is 0.001-0.002, and the coagulation regulator is selected from coagulation accelerators; when the construction temperature is 27-40 ℃, the mass portion of the set adjusting agent is 0.003-0.004, the set adjusting agent consists of a coagulant and a retarder, and the mass ratio of the coagulant to the retarder is that the coagulant is =1: 2-3.
Preferably, the set accelerator is selected from one or more of sodium nitrite, lithium carbonate, sodium sulfate and aluminium sulfate.
Preferably, the retarder is selected from one or more of tartaric acid, boric acid, borax, sodium gluconate and citric acid.
Preferably, the silane coupling agent is selected from one or more of 3-aminopropyltriethoxysilane, isobutyltriethoxysilane, isobutylene triethoxysilane and isooctyltriethoxysilane.
Preferably, the polymer emulsion is selected from one or more of styrene-butadiene emulsion, carboxylic styrene-butadiene emulsion, styrene-acrylic emulsion, modified acrylic resin emulsion and ethylene/vinyl acetate copolymer emulsion.
Preferably, the cement is selected from one or more of early strength portland cement, quick-hardening sulphoaluminate cement, ferro-aluminate cement, fluoroaluminate cement and double-quick cement; more preferably a fast hardening sulphoaluminate cement.
Preferably, the cement expansive admixture is one or more selected from calcium sulfoaluminate clinker-limestone, aluminosilicate clinker-alumina, aluminosilicate clinker-alunite, lime-alunite composite, calcium aluminate, alunite and fly ash admixture.
Preferably, the sand is selected from one or more of river sand, sea sand, mountain sand and machine-made silica sand.
More preferably, the fineness modulus of the sand is 2.3-3.0, and the mud content or stone powder content is less than 1% by weight.
Preferably, the water reducing agent is selected from one or more of naphthalene series and polycarboxylic acid series; more preferably polycarboxylic acids.
Preferably, the rheology modifier is selected from one or more of cellulose ether, acrylic, polyether and polyurethane thickeners; more preferably one or both of a cellulose ether and a polyurethane thickener.
Preferably, the defoaming agent is selected from one or more of organic silicon, higher alcohols, fatty acids and polyethers; more preferably one or more selected from organic phosphates, silicone resins, modified silicone resins and complexes of silica with silicone resins.
The invention also provides a preparation method of the polymer quick-hardening cement mortar, which comprises the following steps:
A. sequentially adding the polymer emulsion, water, a defoaming agent, a water reducing agent and a silane coupling agent in parts by mass into a stirrer, and uniformly stirring at the stirring speed of 20-40 rpm;
B. adding the sand in parts by mass, and uniformly stirring at the stirring speed of 60-80 rpm;
C. sequentially adding the cement, the cement expansion mixing material, the coagulation regulator and the rheology modifier in parts by mass, and uniformly stirring at the stirring speed of 100-140 rpm;
D. stirring at a stirring speed of 100-140 rpm for 3-5 minutes, and then adjusting the stirring speed to 20-40 rpm and continuing stirring for 1 minute to obtain the modified starch;
or
Uniformly mixing the cement, the cement expansion mixture, the sand, the rheology modifier and the coagulation regulator in parts by mass to obtain dry powder;
b', sequentially adding the polymer emulsion, water, a water reducing agent, a defoaming agent and a silane coupling agent into a mortar stirrer, and stirring at a low speed of 20-40 rpm;
and C', adding the prepared dry material, quickly stirring for 3-5 minutes at a stirring speed of 100-140 rpm, and then adjusting the stirring speed to 20-40 rpm and continuously stirring for 1 minute to obtain the composite material.
The invention also aims to provide the application of the polymer quick-hardening cement mortar in the quick rush repair of a waterproof system between railway concrete bridge deck lines.
The invention also provides a rapid first-aid repair method of the waterproof system between the railway concrete bridge deck lines, which comprises the step of adopting the polymer rapid hardening cement mortar.
Preferably, the rapid repair method comprises the following steps:
I. cleaning and removing the damaged concrete protective layer to expose the waterproof roll layer;
II, coating 1-3 times of silane coupling agent on the exposed waterproof roll material layer and the cross section of the concrete protective layer around the waterproof roll material layer, wherein the silane coupling agent is defined as above;
according to the longitudinal width of the concrete protective layer to be repaired, respectively adopting the following operations:
III-1, when the longitudinal width of the concrete protective layer is less than 1m, preparing the polymer quick-hardening cement mortar on site according to the preparation method, pouring the polymer quick-hardening cement mortar on the surface of the cleaned waterproof roll, and leveling the polymer quick-hardening cement mortar with the peripheral original concrete protective layer; or
III-2, when the longitudinal width of the concrete protective layer is larger than 1m, cutting the prefabricated lightweight concrete board into a size corresponding to the concrete protective layer to be repaired, preparing the polymer quick-hardening cement mortar on site according to the preparation method, pouring the polymer quick-hardening cement mortar on the surface of the cleaned waterproof coiled material, placing the lightweight concrete prefabricated board on the surface of the poured mortar, leveling the lightweight concrete prefabricated board with the original peripheral concrete protective layer, and sealing the peripheral gap of the prefabricated board by caulking glue after the mortar has the strength (about 1 h);
and IV, after the polymer rapid hardening cement mortar is solidified, continuously cleaning the repaired surface, and keeping the repaired surface and the original peripheral concrete protective layer on the same horizontal plane.
The lightweight concrete precast slab meets the LC40 strength grade, and each cubic meter of the lightweight concrete precast slab comprises the following raw materials: 400-500 kg of cement, 400-600 kg of sand, 800-1000 kg of ceramsite, 100-300 kg of high polymer emulsion, 100-200 kg of mineral admixture, 4-10 kg of water reducing agent and 100-200 kg of water.
Preferably, the cement is selected from one or more of ordinary portland cement and portland cement.
Preferably, the sand is selected from one or more of river sand, sea sand, mountain sand and machine-made silica sand.
More preferably, the fineness modulus of the sand is 2.3-3.0, and the mud content or stone powder content is less than 1% by weight.
Preferably, the polymer emulsion is selected from one or more of styrene-butadiene emulsion, carboxylic styrene-butadiene emulsion, styrene-acrylic emulsion, modified acrylic resin emulsion and ethylene/vinyl acetate copolymer emulsion.
Preferably, the ceramsite is one or more selected from crushed stone type, spherical and conical shale ceramsite, and is subjected to vacuum water saturation treatment for 24 hours.
Preferably, the mineral admixture is selected from one or more of fly ash, slag powder and silica fume.
Preferably, the water reducing agent is selected from one or more of naphthalene series and polycarboxylic acid series; more preferably polycarboxylic acids.
The caulking compound is commonly used in the field, and can be selected from silicone structure weather-resistant sealant, polysulfide sealant, polyurethane sealant and the like, and is preferably polyurethane sealant.
The polyurethane sealant has better high and low temperature resistance and weather resistance, long service life and good environmental protection property, and is particularly suitable for the condition of large deformation.
The "parts by mass" or "parts" in the present specification means relative mass ratios between the respective components, not mass units. The 1 part (part by mass) may be 500g, 1kg, 10kg, etc., according to the actual need.
In order to meet the requirement of rapid repair, the polymer quick-hardening cement mortar has to have proper setting time, namely about 2 h. If the length is too short, all the first-aid repair tasks cannot be completed; if the length is too long, the vehicle cannot be put back on time. Therefore, the setting time of the rapid repair mortar is adjusted by the setting regulator. Wherein, the accelerator is preferably one or more of sodium nitrite, aluminum sulfate, sodium sulfate and lithium carbonate, which can promote the early setting and early strength of the mortar; the retarder is preferably one or more of tartaric acid, boric acid, borax, citric acid and sodium gluconate, and can adjust the working time of the mortar to meet the construction requirements at different temperatures. The invention provides the mass ratios of the coagulant to the retarder at three construction temperatures, which are respectively as follows: when the construction temperature is 5-15 ℃, the mass part of the coagulation regulator is 0.002-0.003, and the coagulation regulator is selected from coagulation accelerators; when the construction temperature is 15-27 ℃, the mass part of the coagulation regulator is 0.001-0.002, and the coagulation regulator is selected from coagulation accelerators; when the construction temperature is 27-40 ℃, the mass portion of the set adjusting agent is 0.003-0.004, the set adjusting agent consists of a coagulant and a retarder, and the mass ratio of the coagulant to the retarder is that the coagulant is =1: 2-3.
The silane coupling agent in the mortar has the advantages that organic and inorganic groups in molecules can be respectively combined with inorganic materials and macromolecules in the mortar to form firm covalent bonds, the interfacial adhesion of the two materials is improved, the mortar has excellent impermeability, water resistance and a more compact structure, and the mechanical property and the durability of the materials are improved.
In order to make the mortar of the invention quickly set and strengthen, the cement of the invention is preferably quick-hardening sulphoaluminate cement.
The high-molecular emulsion can reduce the amount of water for mixing, thereby improving the water resistance, frost resistance, weather resistance and fatigue resistance of the mortar. In the invention, the polymer emulsion is selected from one or more of butylbenzene emulsion, carboxylic butylbenzene emulsion, styrene-acrylic emulsion, modified acrylic resin emulsion and ethylene/vinyl acetate copolymer emulsion.
The cement expansion mixed material takes sulphoaluminate minerals as a main body, contains trace macromolecular series dispersing agents and inorganic salts, and has the function of relieving the drying shrinkage of mortar. Through tests, the tests show that the commercially available cement expansive mixed materials can achieve similar effects, and the commercially available cement expansive mixed materials comprise common commercially available cement expansive mixed materials such as calcium sulphoaluminate clinker-limestone, aluminosilicate clinker-alumina, aluminosilicate clinker-alunite, lime-alunite composite, calcium aluminate, alunite, fly ash mixed materials and the like.
The water reducing agent can reduce the mixing water consumption and improve the fluidity and the homogeneity of the mortar. The water reducing agent is selected from one or more of naphthalene series and polycarboxylic acid; more preferably polycarboxylic acids.
The rheology modifier can improve the mixing stability of the mortar and endow the mortar with thixotropy; under the shearing action, the mortar has good fluidity so as to be fully filled; and after the mortar is stood still, the viscosity of the mortar is increased, the homogeneity of the mortar is improved, and bleeding and sand setting are prevented. The rheology modifier is selected from one or more of cellulose ether, acrylic acid, polyether and polyurethane thickening agent; more preferably a cellulose ether and/or polyurethane thickener.
The function of the defoaming agent is to eliminate large bubbles generated in the system due to stirring. The defoaming agent is selected from one or more of organic silicon, higher alcohols, fatty acids and polyether; more preferably one or more selected from organic phosphates, silicone resins, modified silicone resins and complexes of silica with silicone resins.
The polymer quick-hardening cement mortar disclosed by the invention is endowed with excellent fluidity and quick-setting early strength through the components and the mass ratio thereof, so that the 2h compressive strength of the mortar can reach 4MPa even at 5 ℃, and the requirement of short emergency repair skylight period of a high-speed railway, especially the high-speed railway in a alpine region, is met. Meanwhile, the mortar has a compact structure and excellent mechanical properties after being solidified, so that the repaired concrete protective layer has excellent durability and anti-vibration performance.
The quick maintenance method provided by the invention utilizes a weak bonding interface of concrete and a waterproof coiled material, a limiting device is additionally arranged before a breaking-in head, the integrity of the coiled material is prevented from being damaged when a concrete (concrete) protective layer is removed, small-area quick repair of the protective layer adopts polymer quick-hardening cement mortar, large-area quick repair adopts a light concrete precast slab and the polymer quick-hardening cement mortar arranged below the precast slab as a leveling layer, and the gap of the precast slab is sealed and waterproof by caulking compound.
Drawings
The present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic view showing the structure of a waterproof system between bridge deck lines after completion of maintenance in example 7. Wherein 1A is a plan view and 1B is a sectional view. In the figure: the concrete slab is characterized in that the concrete slab comprises a light concrete precast slab 1, a sealant 2, a track slab 3, a concrete base 4, a concrete protective layer 5, a steel rail 6 and a polymer rapid hardening cement mortar layer (leveling layer) 7.
Detailed Description
The present invention is described below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.
The experimental procedures in the following examples are conventional unless otherwise specified. The raw materials and reagent materials used in the following examples are all commercially available products unless otherwise specified. Wherein the sources of part of raw materials are as follows:
42.5 quick hardening sulphoaluminate cement: cement, ltd, sanjiu, down mountain;
calcium sulphoaluminate clinker-limestone expansion mixed material: tang shan polar bear building materials ltd;
modified acrylic emulsion: beijing Oriental Asiatic Strength chemical science and technology, Inc.;
styrene-butadiene emulsion: beijing Oriental Asiatic Strength chemical science and technology, Inc.;
isobutylene triethoxy silicon: beijing build Lide New materials Co., Ltd;
hydroxypropyl methylcellulose ether: guangdong Longhu science and technology Co., Ltd;
example 1: polymer rapid-hardening cement mortar for construction environment at 5-15 DEG C
The polymer quick-hardening cement mortar in the embodiment comprises the following raw materials in parts by weight (1 =100 kg):
42.5 portions of quick hardening sulphoaluminate cement 0.99 portion, 0.01 portion of sulphoaluminate clinker-limestone expansion mixed material, 0.5 portion of modified acrylic emulsion, 0.03 portion of isobutylene triethoxysilane, 2 portions of sand, 0.002 portion of lithium carbonate, 0.001 portion of organosilicon defoamer, 0.003 portion of polycarboxylic acid water reducing agent, 0.0007 portion of polyurethane thickener and 0.15 portion of water.
The polymer quick-hardening cement mortar of the embodiment is prepared by the following method:
A. sequentially adding the polymer emulsion, water, a defoaming agent, a water reducing agent and a silane coupling agent in parts by mass into a stirrer, and uniformly stirring at the stirring speed of 20-40 rpm;
B. adding the sand in parts by mass, and uniformly stirring at the stirring speed of 60-80 rpm;
C. sequentially adding the cement, the cement expansion mixing material, the coagulation regulator and the rheology modifier in parts by mass, and uniformly stirring at the stirring speed of 100-140 rpm;
D. and stirring at a stirring speed of 100-140 rpm for 3-5 minutes, and then adjusting the stirring speed to 20-40 rpm and continuing stirring for 1 minute to obtain the composite material.
The properties of the polymer quick-setting cement mortar described in this example are shown in Table 1.
Example 2: polymer rapid hardening cement mortar suitable for 15-27 ℃ construction environment
The polymer quick-hardening cement mortar in the embodiment comprises the following raw materials in parts by weight (1 =100 kg):
42.5 parts of quick hardening sulphoaluminate cement, 0.99 part of lime-alunite composite expansion mixed material, 0.5 part of modified acrylic emulsion, 0.03 part of isobutylene triethoxysilane, 2 parts of sand, 0.001 part of lithium carbonate, 0.001 part of organic silicon defoamer, 0.005 part of polycarboxylic acid water reducer, 0.0007 part of hydroxypropyl methyl cellulose ether and 0.2 part of water.
The polymer quick-hardening cement mortar of this example was prepared according to the same method and procedure as in example 1.
The properties of the polymer quick-setting cement mortar described in this example are shown in Table 1.
Example 3: polymer rapid hardening cement mortar suitable for construction environment at 27-40 DEG C
The polymer quick-hardening cement mortar in the embodiment comprises the following raw materials in parts by weight (1 =100 kg):
42.5 portions of rapid hardening sulphoaluminate cement, 0.99 portion of sulphoaluminate clinker-limestone expansion mixed material, 0.5 portion of butylbenzene emulsion, 0.03 portion of isobutylene triethoxysilane, 2 portions of sand, 0.001 portion of lithium carbonate, 0.002 portion of borax, 0.001 portion of organic silicon defoamer, 0.005 portion of polycarboxylic acid water reducer, 0.0004 portion of hydroxypropyl methyl cellulose ether and 0.2 portion of water.
The polymer quick-hardening cement mortar in the embodiment is prepared by the following method:
uniformly mixing the cement, the cement expansion mixture, the sand, the rheology modifier and the coagulation regulator in parts by mass to obtain dry powder;
b', sequentially adding the polymer emulsion, water, a water reducing agent, a defoaming agent and a silane coupling agent into a mortar stirrer, and stirring at a low speed of 20-40 rpm;
and C', adding the dry material prepared in the step I, quickly stirring for 3-5 minutes at a stirring speed of 100-140 rpm, and then adjusting the stirring speed to 20-40 rpm and continuously stirring for 1 minute to obtain the composite material.
The properties of the polymer quick-setting cement mortar described in this example are shown in Table 1.
Comparative example 1: polymer cement mortar
42.5 parts of rapid hardening sulphoaluminate cement 0.99 part, 0.20 part of acrylic emulsion, 2 parts of sand, 0.001 part of lithium carbonate, 0.001 part of organic silicon defoamer, 0.01 part of polycarboxylic acid water reducer, 0.0007 part of hydroxyethyl cellulose ether and 0.2 part of water.
The properties of comparative example 1 are shown in table 1.
Test example: property measurement of Cement mortars of examples 1 to 3 and comparative example 1
In the table, the properties of the cement mortars of examples 1 to 3 and comparative example 1 were measured by referring to the method described in JCT984-2011 "polymer cement waterproof mortar", and the results are shown in table 1.
TABLE 1 Polymer quick-hardening Cement mortar Properties
The data in table 1 show:
1) the embodiment 1 of the invention aims at the polymer quick-hardening cement mortar in the low-temperature environment of 5-15 ℃, the compressive strength of 2h reaches 4.2MPa, and the breaking strength of 2h reaches 2.3 MPa. The compressive strength of the polymer rapid hardening cement mortar in the embodiment 2 reaches 5.0MPa within 2h in a working environment at 15-27 ℃, and the flexural strength reaches 2.5MPa within 2 h. The compressive strength of the polymer quick-hardening cement mortar in the embodiment 3 reaches 5.6MPa within 2h in a working environment at 27-40 ℃, and the flexural strength within 2h reaches 2.3 MPa. Therefore, the 3 embodiments can be respectively adapted to different construction temperatures, and the polymer quick-hardening cement mortar provided by the invention can meet the requirement of a high-speed railway in the skylight emergency repair period, especially the emergency repair in severe cold areas or in winter.
2) The seepage resistance pressure of the polymer quick-hardening cement mortar of each embodiment of the invention after being completely cured reaches more than 3.0MPa, the bonding strength is more than 1.5MPa, and the shrinkage rate is only 0.02%. The water absorption is less than 3.4 percent. The polymer quick-hardening cement mortar provided by the invention has excellent waterproof performance and can be well bonded with the original waterproof protective layer.
2) The polymer cement mortar of comparative example 1 had both 2h compressive strength and 2h flexural strength inferior to those of the examples of the present invention; after curing, the polymer cement mortar of comparative example 1 also had significantly less resistance to permeation pressure and bonding strength than the examples; it is illustrated that the polymer cement mortar of comparative example 1 has poor mechanical properties. However, the shrinkage and water absorption of the polymer cement mortar of comparative example 1 were significantly higher than those of the examples, indicating that the waterproof property of the polymer cement mortar of comparative example 1 was inferior to that of the examples of the present invention.
And (4) conclusion: the general polymer cement mortar of comparative example 1 has substantially the same components and amounts as those of the polymer quick-setting cement mortar provided in the present invention except that it does not contain an expansive material, a silane coupling agent and a polymer emulsion, but has the above-described significant difference from the polymer quick-setting cement mortars of examples 1 to 3 in properties. The raw material composition of the polymer quick-hardening cement mortar provided by the invention ensures that the structure of the cured mortar is more compact and waterproof, and is a foundation and guarantee for the excellent performance of the mortar.
Example 4: lightweight concrete precast slab
The lightweight concrete precast slab comprises the following raw materials in parts by weight: 42.5 ordinary Portland cement 420kg/m3590 kg/m river sand3150 kg/m of modified acrylic emulsion3800-grade macadam type ceramsite 823 kg/m3Class I fly ash 100 kg/m35.2 kg/m of polycarboxylic acid high-efficiency water reducing agent3145 kg/m of water3. Prepared and cured according to methods conventional in the art. The properties are shown in Table 2.
Example 5: lightweight concrete precast slab
The lightweight concrete precast slab of the embodiment comprises the following raw materials in percentage by weight: 42.5 ordinary Portland cement 420kg/m3590 kg/m river sand3160 kg/m styrene-acrylic emulsion3800-grade macadam type ceramsite 823 kg/m3120 kg/m of slag37kg/m of polycarboxylic acid high-efficiency water reducing agent3140 kg/m of water3. Prepared and cured according to conventional methods in the art. The properties are shown in Table 2.
Comparative example 2: lightweight concrete precast slab
The lightweight concrete precast slab of the comparative example 2 comprises the following raw materials in parts by weight: 42.5 ordinary Portland cement 420kg/m3420kg/m river sand3800-grade broken stone type ceramsite 1100 kg/m3Class I fly ash 100 kg/m3Polycarboxylic acid water reducing agentAgent 7kg/m3100 kg/m of water3. Prepared and cured according to conventional methods in the art. The properties are shown in Table 2.
Table 2 lightweight concrete panel properties
Example 6: assembly type rapid maintenance method for waterproof roll concrete protective layer of railway concrete bridge deck (small-area maintenance)
I. Cleaning and removing the damaged concrete protective layer to expose the waterproof roll layer;
II, brushing isobutylene triethoxysilane for 2 times on the exposed waterproof roll layer and the sections of the concrete protective layers around the waterproof roll layer;
the size of the concrete protective layer to be repaired was measured to be 65 x 90cm (transverse x longitudinal). According to the proportioning and preparation method of the mortar described in the embodiment 1, the polymer quick-hardening cement mortar is mixed on site, poured on the surface of the cleaned waterproof roll and leveled with the original concrete protective layer on the periphery;
and IV, after the polymer rapid hardening cement mortar is solidified, continuously cleaning the repaired surface, and keeping the repaired surface and the original peripheral concrete protective layer on the same horizontal plane.
Example 7: assembly type rapid maintenance method for waterproof roll concrete protective layer of railway concrete bridge deck (large-area maintenance)
I. Cleaning and removing the damaged concrete protective layer to expose the waterproof roll layer;
II, coating 1-3 times of silane coupling agent on the exposed waterproof roll material layer and the cross section of the concrete protective layer around the waterproof roll material layer, wherein the silane coupling agent is defined as above;
measuring, wherein the size of the concrete protection layer to be repaired is 700 multiplied by 800cm (transverse multiplied by longitudinal), cutting the lightweight concrete slab prefabricated in the embodiment 4 into the size corresponding to the concrete protection layer to be repaired, mixing the polymer quick-hardening cement mortar on site according to the proportion and the preparation method of the mortar described in the embodiment 2, pouring the polymer quick-hardening cement mortar on the surface of the cleaned waterproof coiled material to be used as a leveling layer, placing the lightweight concrete precast slab on the surface of the poured leveling layer, leveling the lightweight concrete precast slab with the original peripheral concrete protection layer, and sealing the peripheral gap of the precast slab by adopting polyurethane sealant after the mortar is reinforced (about 1 h);
and IV, after the polymer rapid hardening cement mortar is solidified, continuously cleaning the repaired surface, and keeping the repaired surface and the original peripheral concrete protective layer on the same horizontal plane.
The structural schematic diagram of the waterproof system between bridge deck lines after the maintenance is finished is shown in figure 1.
In a word, the polymer quick-hardening cement mortar, the precast slab and the construction method thereof provided by the invention meet the maintenance requirements of railway skylight points.
The above description of the specific embodiments of the present invention is not intended to limit the present invention, and those skilled in the art may make various changes and modifications according to the present invention without departing from the spirit of the present invention, which is defined by the scope of the appended claims.
Claims (7)
1. The polymer quick-hardening cement mortar is used for quick first-aid repair of a waterproof system between railway concrete bridge decks, is used in a construction environment of 5-15 ℃, and comprises the following components in parts by weight:
42.5 portions of quick hardening sulphoaluminate cement 0.99 portion, 0.01 portion of sulphoaluminate clinker-limestone expansion mixed material, 0.5 portion of modified acrylic emulsion, 0.03 portion of isobutylene triethoxysilane, 2 portions of sand, 0.002 portion of lithium carbonate, 0.001 portion of organosilicon defoamer, 0.003 portion of polycarboxylic acid water reducing agent, 0.0007 portion of polyurethane thickener and 0.15 portion of water.
2. The polymer quick-hardening cement mortar is used for quick first-aid repair of a waterproof system between railway concrete bridge decks, is used in a construction environment of 15-27 ℃, and comprises the following components in parts by weight:
42.5 parts of quick hardening sulphoaluminate cement, 0.99 part of lime-alunite composite expansion mixed material, 0.5 part of modified acrylic emulsion, 0.03 part of isobutylene triethoxysilane, 2 parts of sand, 0.001 part of lithium carbonate, 0.001 part of organic silicon defoamer, 0.005 part of polycarboxylic acid water reducer, 0.0007 part of hydroxypropyl methyl cellulose ether and 0.2 part of water.
3. The polymer quick-hardening cement mortar is used for quick first-aid repair of a waterproof system between railway concrete bridge decks, is used in a construction environment of 27-40 ℃, and comprises the following components in parts by weight:
42.5 portions of rapid hardening sulphoaluminate cement, 0.99 portion of sulphoaluminate clinker-limestone expansion mixed material, 0.5 portion of butylbenzene emulsion, 0.03 portion of isobutylene triethoxysilane, 2 portions of sand, 0.001 portion of lithium carbonate, 0.002 portion of borax, 0.001 portion of organic silicon defoamer, 0.005 portion of polycarboxylic acid water reducer, 0.0004 portion of hydroxypropyl methyl cellulose ether and 0.2 portion of water.
4. A method for preparing the polymer quick-hardening cement mortar of any one of claims 1 to 3, comprising the steps of:
A. sequentially adding the polymer emulsion, water, a defoaming agent, a water reducing agent and a silane coupling agent in parts by mass into a stirrer, and uniformly stirring at the stirring speed of 20-40 rpm;
B. adding the sand in parts by mass, and uniformly stirring at the stirring speed of 60-80 rpm;
C. sequentially adding the cement, the cement expansion mixing material, the coagulation regulator and the rheology modifier in parts by mass, and uniformly stirring at the stirring speed of 100-140 rpm;
D. stirring at a stirring speed of 100-140 rpm for 3-5 minutes, and then adjusting the stirring speed to 20-40 rpm and continuing stirring for 1 minute to obtain the modified starch;
or
Uniformly mixing the cement, the cement expansion mixture, the sand, the rheology modifier and the coagulation regulator in parts by mass to obtain dry powder;
b', sequentially adding the polymer emulsion, water, a water reducing agent, a defoaming agent and a silane coupling agent into a mortar stirrer, and stirring at a low speed of 20-40 rpm;
and C', adding the prepared dry material, quickly stirring for 3-5 minutes at a stirring speed of 100-140 rpm, and then adjusting the stirring speed to 20-40 rpm and continuously stirring for 1 minute to obtain the composite material.
5. Use of the polymer quick-hardening cement mortar according to any one of claims 1 to 3 or prepared according to the preparation method of claim 4 in rapid rush repair of waterproof systems between railway concrete bridge deck lines.
6. A rapid rush-repair method for a waterproof system between railway concrete bridge deck lines comprises the steps of adopting the polymer quick-hardening cement mortar of any one of claims 1 to 3 or the polymer quick-hardening cement mortar prepared by the preparation method of claim 4, and the steps are as follows:
I. cleaning and removing the damaged concrete protective layer to expose the waterproof roll layer;
II, coating silane coupling agent for 1-3 times on the exposed waterproof roll material layer and the sections of the concrete protection layers around the waterproof roll material layer;
according to the longitudinal width of the concrete protective layer to be repaired, respectively adopting the following operations:
III-1, when the longitudinal width of the concrete protective layer is less than 1m, preparing the polymer quick-hardening cement mortar on site according to the preparation method of claim 4, pouring the polymer quick-hardening cement mortar on the surface of the cleaned waterproof roll, and leveling the polymer quick-hardening cement mortar with the peripheral original concrete protective layer; or
III-2, when the longitudinal width of the concrete protective layer is larger than 1m, cutting the prefabricated lightweight concrete board into a size corresponding to the concrete protective layer to be repaired, preparing the polymer quick-hardening cement mortar on site according to the preparation method of claim 4, pouring the polymer quick-hardening cement mortar on the surface of the cleaned waterproof coiled material, placing the lightweight concrete prefabricated board on the surface of the poured mortar, leveling the lightweight concrete prefabricated board with the original peripheral concrete protective layer, and sealing the peripheral gap of the prefabricated board by caulking glue after the mortar has the upper strength;
and IV, after the polymer rapid hardening cement mortar is solidified, continuously cleaning the repaired surface, and keeping the repaired surface and the original peripheral concrete protective layer on the same horizontal plane.
7. The rapid repair method according to claim 6, wherein the lightweight concrete precast slab meets LC40 strength grade, and comprises the following raw materials: 42.5 ordinary Portland cement 420kg/m3590 kg/m river sand3150 kg/m of modified acrylic emulsion3800-grade macadam type ceramsite 823 kg/m3Class I fly ash 100 kg/m35.2 kg/m of polycarboxylic acid high-efficiency water reducing agent3145 kg/m of water3，
Or
42.5 ordinary Portland cement 420kg/m3590 kg/m river sand3160 kg/m styrene-acrylic emulsion3800-grade macadam type ceramsite 823 kg/m3120 kg/m of slag37kg/m of polycarboxylic acid high-efficiency water reducing agent3140 kg/m of water3。
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| CN111635201B (en) * | 2019-08-12 | 2022-06-14 | 河南德鑫新型建材有限公司 | Concrete fast repairing material for road and preparation process thereof |
| CN111574141A (en) * | 2020-03-31 | 2020-08-25 | 中国一冶集团有限公司 | Ceramsite concrete, ceramsite concrete protective layer and construction method thereof |
| CN116283042B (en) * | 2021-12-21 | 2024-07-23 | 中国科学院过程工程研究所 | Powdery concrete accelerator and preparation method and application thereof |
| CN114853430A (en) * | 2022-05-23 | 2022-08-05 | 成都嘉新科技集团有限公司 | High-performance polymer mortar and preparation method thereof |
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| CN102643058A (en) * | 2012-04-19 | 2012-08-22 | 招商局重庆交通科研设计院有限公司 | New/old cement concrete interfacial binding agent and construction method for interfacial binding by using same |
| CN103265249A (en) * | 2013-05-23 | 2013-08-28 | 中国铁道科学研究院金属及化学研究所 | Fast rush-repair mortar for ballastless track filling layer and preparation method and application thereof |
| CN104343188A (en) * | 2013-07-31 | 2015-02-11 | 吕孟龙 | Water-proof board leaking stoppage method |
| CN105036657A (en) * | 2015-07-29 | 2015-11-11 | 国网智能电网研究院 | High-strength lightweight aggregate concrete and preparation method thereof |
| CN108129078A (en) * | 2017-12-21 | 2018-06-08 | 天津新滨工程技术检测有限公司 | A kind of modification spray liniment, lightweight precast concrete plate and preparation method |
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