CN107840592A - A kind of concrete self-repair function additive and preparation method thereof - Google Patents
A kind of concrete self-repair function additive and preparation method thereof Download PDFInfo
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- CN107840592A CN107840592A CN201711094897.9A CN201711094897A CN107840592A CN 107840592 A CN107840592 A CN 107840592A CN 201711094897 A CN201711094897 A CN 201711094897A CN 107840592 A CN107840592 A CN 107840592A
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- concrete
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- repair function
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- 239000004567 concrete Substances 0.000 title claims abstract description 108
- 239000000654 additive Substances 0.000 title claims abstract description 53
- 230000000996 additive effect Effects 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 150000002500 ions Chemical class 0.000 claims abstract description 38
- 239000008139 complexing agent Substances 0.000 claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 23
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims abstract description 16
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 7
- 238000007334 copolymerization reaction Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000005213 imbibition Methods 0.000 claims description 4
- 239000000320 mechanical mixture Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims 2
- 229910021641 deionized water Inorganic materials 0.000 claims 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 238000007906 compression Methods 0.000 description 20
- 230000006835 compression Effects 0.000 description 20
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 14
- 229910001424 calcium ion Inorganic materials 0.000 description 14
- 235000011194 food seasoning agent Nutrition 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 239000004568 cement Substances 0.000 description 10
- 230000006378 damage Effects 0.000 description 10
- 230000035876 healing Effects 0.000 description 8
- RNIHAPSVIGPAFF-UHFFFAOYSA-N Acrylamide-acrylic acid resin Chemical compound NC(=O)C=C.OC(=O)C=C RNIHAPSVIGPAFF-UHFFFAOYSA-N 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 206010061245 Internal injury Diseases 0.000 description 7
- 239000011575 calcium Substances 0.000 description 7
- 229910052791 calcium Inorganic materials 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 230000015271 coagulation Effects 0.000 description 6
- 238000005345 coagulation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 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 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- -1 silicate ion Chemical class 0.000 description 5
- 239000000176 sodium gluconate Substances 0.000 description 5
- 229940005574 sodium gluconate Drugs 0.000 description 5
- 235000012207 sodium gluconate Nutrition 0.000 description 5
- 238000013019 agitation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000003094 microcapsule Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000010257 thawing Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000001509 sodium citrate Substances 0.000 description 3
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 description 2
- 229960001231 choline Drugs 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- OQUFOZNPBIIJTN-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;sodium Chemical group [Na].OC(=O)CC(O)(C(O)=O)CC(O)=O OQUFOZNPBIIJTN-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 241000040710 Chela Species 0.000 description 1
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000005837 radical ions Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000007420 reactivation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000003643 water by type Substances 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/10—Acids or salts thereof containing carbon in the anion
- C04B22/106—Bicarbonates
-
- 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
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F122/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
- C08F122/04—Anhydrides, e.g. cyclic anhydrides
- C08F122/06—Maleic anhydride
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention belongs to building material field, and in particular to a kind of concrete self-repair function additive and preparation method thereof.The function additive is mixed with by polybasic ion complexing agent, calcium bicarbonate, water-absorbing resins to be formed, and each raw materials by weight portion is calculated as：40~60 parts of polybasic ion complexing agent, 40~50 parts of calcium bicarbonate, 1~5 part of water-absorbing resins.The function additive has the advantages that self-reparing capability is strong, and wide seam selfreparing effect is good, reparation speed is fast, and no deferred action, practicality is stronger, has stronger application and popularization value in concrete selfreparing field.
Description
Technical field
The invention belongs to building material field, and in particular to a kind of concrete self-repair function additive and its preparation side
Method.
Background technology
Cement concrete is as important foundation construction material in building construction, road construction, subway tunnel, bridge, water
The fields such as storehouse dam, power station, harbour are widely applied.However, concrete is brittle material containing multiple holes, by external environment because
The effect of element easily produces internal injury and crack.Damage and crack can reduce the intensity of concrete, aggravate the chemistry of concrete
Erosion, the generation of freeze-thaw damage, steel bar corrosion and alkali, the serious durability for reducing concrete structures.
To improve the durability of concrete structures, concrete damage and crack autogenous healing technology are increasingly paid attention to.It is existing
There is concrete self-repair technology mainly to have：Addition function additive excite concrete itself component internally damage with it is anti-at crack
Answer selfreparing；The microcapsules containing binding agent are filled, binding agent fracture selfreparing after microcapsules rupture；Filled in concrete
Microorganism and nutrient solution, by microorganism and nutrient solution reaction manufacture calcite to damage and crack autogenous healing.These selfreparings
In technology, there is when there is damage and cracking initiation the problem of capsule is difficult to rupture, and binding agent can not flow out, micro- life in microcapsule method
There is the problem of microbial survival phase is short and it can reduce concrete strength in thing method, fail practicality.
Compared with microcapsule method and microbial method, function additive method self-repair technology has certain practicality.Specially
The sharp A of CN 101386508 disclose the formula and preparation technology of a kind of creak self-repair material, and the crack of the disclosure of the invention is reviewed one's lessons by oneself
The formula of material is again：The oxidation of 62-77% portland cement, 0.2-1% sodium citrate, 3-8% choline, 1-3%
The 80-120 mesh of calcium, 22-35%.When crack occurs in concrete, under conditions of having moisture or humidity, the invention utilizes citric acid
Sodium forms water-soluble kinetically unstable complex with the calcium ion in concrete, silicate ion respectively with choline, in the hole of concrete
Crystallize to form precipitation at gap and crack, realize selfreparing.Patent CN 105884299A disclose a kind of super self-healing yardstick cracking
Concrete Thief zone crystallizes repair materials, and the composition of the material is：Portland cement 30~45%, quartz sand 40~
60%th, flyash 3~15%, silicon ash 1~8%, aluminate cement 1~10%, gypsum 1~10%, sodium hydroxide 0.1~4%,
Waterglass 0.1~4%, re-dispersible glue powder 0.1~2%, poly carboxylic acid series water reducer 0.05~1.5%, sodium gluconate 0.01
~1% and polypropylene fibre 0.1~2.5%.But existing concrete self-repair function additive is present：(1) lemon used
Sour sodium, sodium gluconate have very strong inhibitory action to the aquation of cement, belong to typical cement concrete retarder, Shao Liangjia
The setting time of concrete will be greatly prolonged by entering；(2) chela that sodium citrate, sodium gluconate etc. are formed after being reacted with calcium ion
Conjunction product is loop configuration, and molecular dimension is larger, to the crack of concrete at migration velocity it is slow, or even in some micro-pores
It can not migrate across；(3) free calcium ions in concrete and silicate ion are less, sodium citrate, sodium gluconate etc.
The quantity of chelating calcium ion is few, and ability of the carrying calcium ion at crack is weak, to being unable to selfreparing compared with wide seam；(4) citric acid
With calcium ion chelatropic reaction and migration and function additive and silicate ion into crack occur for sodium, sodium gluconate etc.
The ability in the case where having moisture or moist conditions is required to Deng reaction, and crack autogenous healing needs the long period, and concrete
Moisture-retaining capacity is very weak, and internal moisture is volatilized quickly, once no moisture or moisture are present in concrete, selfreparing reaction will stop
Only, it is difficult to realize and repair well.The presence of these problems seriously limits function additive answering in concrete selfreparing
With.
The content of the invention
The present invention is in view of the shortcomings of the prior art, and it is an object of the present invention to provide a kind of concrete self-repair function additive and its system
Preparation Method.
For achieving the above object, the technical solution adopted by the present invention is：
A kind of concrete self-repair function additive, by polybasic ion complexing agent, calcium bicarbonate, water-absorbing resins mixing system
Standby to form, each raw materials by weight portion is calculated as：40~60 parts of polybasic ion complexing agent, 40~50 parts of calcium bicarbonate, water imbibition tree
1~5 part of fat.
In such scheme, the molecular structural formula of the polybasic ion complexing agent is：Wherein n
For 2 or 3, molecular weight is between 280~430Da.
In such scheme, the polybasic ion complexing agent prepares gained by the following method：By maleic anhydride and go from
Sub- water is added in band condensation reflux unit reactor, warming while stirring, after maleic anhydride all dissolving, is warming up to
90~95 DEG C, aqueous hydrogen peroxide solution is added, after isothermal reaction for a period of time, sodium hydroxide solution is added and continues to react, instead
After should terminating, product is spray-dried to obtain polybasic ion complexing agent.
In such scheme, each raw materials by weight portion is calculated as in the preparation method：100 parts of maleic anhydride, go from
Sub- 100 parts of water, 30 parts of aqueous hydrogen peroxide solution, 100 parts of sodium hydroxide solution；The volumetric concentration of the aqueous hydrogen peroxide solution is
25%~35%, the molar concentration of the sodium hydroxide solution is 0.1mol/L~0.15mol/L.
In such scheme, the time of isothermal reaction is 3h~5h in the preparation method, add sodium hydroxide solution after
Continuous reaction 1h~2h.
In such scheme, the water-absorbing resins are that acrylic acid-acrylamide is copolymerized water-absorbing resins, and water absorbent rate is
100~300.
The preparation method of above-mentioned concrete self-repair function additive, comprises the following steps：1) parts by weight of each raw material are pressed
Number ratio weighs 40~60 parts of polybasic ion complexing agent, 30~50 parts of calcium bicarbonate, 1~5 part of water-absorbing resins；2) it is more by what is weighed
Mechanical mixture in 1~5 part of first 40~60 parts of ionic complexing agent, 30~50 parts of calcium bicarbonate, water-absorbing resins addition mixer
5min, that is, obtain concrete self-repair function additive.
The polybasic ion complexing agent that the present invention synthesizes is formed by 2 or 3 maleic acid anhydride reactants, molecular structural formula
For：
(n=2 or 3), between 280~430, the polybasic ion complexing agent has molecular weight
Following advantage：1. being linear molecular structure, its complex compound formed with calcium ion migrates speed in the hole of concrete or crack
Degree is fast, in micro-pore also easily by；2. containing multiple complexing units, 4~6 calcium ions, complex ion can be complexed simultaneously
Quantity is more, and fracture repair ability is strong；3. not containing hydroxyl, the heat evolution velocity unrestraint effect to cement, concrete is not influenceed
Setting time.
Beneficial effects of the present invention are as follows：
(1) concrete self-repair function additive of the present invention is by polybasic ion complexing agent, calcium bicarbonate, water imbibition tree
Fat is prepared, wherein the polybasic ion complexing agent contains multiple complexing units, can be complexed greater number of calcium ion；It is described
Calcium bicarbonate can provide calcium ion and carbanion by hydrolyzing；Polybasic ion complexing agent and the free calcium ions in concrete
And calcium ion caused by calcium bicarbonate hydrolysis forms soluble complexes and can moved to water at hole, micro-crack and crack, contains
Silicate ion, carbanion (carbonic acid caused by calcium bicarbonate hydrolysis in the soluble complexes and concrete of calcium ion
Carbanion caused by radical ion and the carbon dioxide hydrolyses penetrated into the air in concrete) react generation calcium silicates and carbon
Sour calcium precipitate come repair damage and crack；The amount of ions that polybasic ion complexing agent can be complexed is more, and calcium in function additive
Ion source is sufficient, while using the super-strong moisture absorbing ability of water-absorbing resins, concrete is in moist shape in the long period
State, ensure the lasting progress of self-repair procedure, greatly improve function additive to the internal injury of concrete and compared with wide seam
Self-reparing capability, the function additive has the advantages that self-reparing capability is strong, and wide seam selfreparing effect is good；
(2) heretofore described polybasic ion complexing agent is linear molecular structure, and its complex compound formed with calcium ion exists
Migration velocity is fast in the hole of concrete or crack, also easily by being advantageous to complex compound to concrete fine fisssure in micro-pore
The speed migrated at line and crack, have and repair fireballing advantage；
(3) heretofore described polybasic ion complexing agent does not contain hydroxyl, the heat evolution velocity unrestraint effect to cement, no
The setting time of concrete can be influenceed, no deferred action, practicality is stronger, has stronger application in concrete selfreparing field
Promotional value.
Brief description of the drawings
Fig. 1 is normal concrete (control group) the crack self-healing photo for being not added with self-repair function additive of the present invention,
Wherein left figure is incipient crack；Right figure is the crack after standard curing 28d.
Fig. 2 is the self-repairing of concrete cracks photo for adding self-repair function additive of the present invention, and wherein left figure is initial
Crack；Right figure is the crack after standard curing 28d.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
In following examples, the polybasic ion complexing agent is prepared via a method which to obtain：Equipped with condensing reflux
200 parts of deionized waters and 200 parts of maleic anhydrides are added in 1000ml three-necked flasks, make maleic anhydride complete by stirring
Portion dissolves, and is heated to 90~95 DEG C, adds the aqueous hydrogen peroxide solution that 30 parts of concentration are 30vt%, isothermal reaction 4h, adds
100 parts of 0.12mol/L sodium hydroxide solutions, 1.5h is reacted, polybasic ion complexing agent then is made by being spray-dried.
Embodiment 1
A kind of concrete self-repair function additive, is prepared via a method which：Weigh 53 parts of polybasic ion complexing agent, carbon
Sour hydrogen Ca45 part, acrylic acid-acrylamide 2 parts of water-absorbing resins of copolymerization, add mechanical agitation 5min in mixer, obtain coagulation
Native self-repair function additive.
Embodiment 2
A kind of concrete self-repair function additive, is prepared via a method which：Weigh 53 parts of polybasic ion complexing agent, carbon
Sour 43 parts of hydrogen calcium, acrylic acid-acrylamide 4 parts of water-absorbing resins of copolymerization, add mechanical agitation 5min in mixer, obtain coagulation
Native self-repair function additive.
Cement, rubble, miberal powder, sand, water, water reducer and embodiment 1 are weighed by the quality proportioning of table 1 or prepared by embodiment 2
Concrete self-repair function additive.First rubble, sand, miberal powder, cement and self-repair function additive addition concrete are stirred
Mix and 30s is mixed in machine, water reducer and water are then added into stirrer for mixing 120s, that is, be made with crack autogenous healing function
Concrete；The concrete self-repair function additive is not added in control group, other conditions are identical.
Self-repair concrete and control group concrete to above-mentioned preparation carry out freezing-thawing damage selfreparing and crack certainly respectively
Recovery test, concrete operations are as follows：
(1) self-repair concrete and each part of control group concrete are taken, is separately added into 100mm × 100mm × 100mm's
In mould, it is stripped after 1 day, is put into fog room and conserves 28 days, is taken out test specimen and carried out 200 times according to national standard GB/T50082-2009
Frozen-thawed cycled at a slow speed, Frozen-thawed cycled take out test specimen, water seasoning 28 days (watering in every 4 days is once), test Frozen-thawed cycled after terminating
The compression strength of test specimen after front and rear and water seasoning.Compression strength is before the self-repair concrete Frozen-thawed cycled of embodiment 1
43.2MPa, compression strength is 35.8MPa after Frozen-thawed cycled, and compression strength is 39.8MPa after water seasoning；The selfreparing of embodiment 2
Compression strength is 42.5MPa before concrete Frozen-thawed cycled, and compression strength is 35.2MPa after Frozen-thawed cycled, resistance to compression after water seasoning
Intensity is 40.6MPa；Compression strength is 41.8MPa before control group concrete Frozen-thawed cycled, and compression strength is after Frozen-thawed cycled
31.7MPa, compression strength 32.6MPa after water seasoning.Result of the test shows that normal concrete (control group) produces through Frozen-thawed cycled
Raw internal injury can not heal after conserving 28 days, and the concrete for filling self-repair function additive produces through Frozen-thawed cycled
Internal injury repaired very well after maintenance (the compression strength recovery rate of embodiment 1 be 92.1%, the pressure resistance of embodiment 2
Recovery rate is spent for 95.5%)；Compared with Example 1, water-absorbing resins increase in self-repair function additive used in embodiment 2,
The damage self-repairing ability of concrete is further improved.
(2) self-repair concrete and each part of control group concrete are taken, pours into concrete flat slab cracking resistance mould respectively
In, vibrate it is floating after blow 4h with fan immediately, keep concrete sample center wind speed be not less than 5m/s, split concrete generation
Seam, is measured to incipient crack, is then carried out water seasoning (watering in every 4 days is once), is conserved to 7 days, 14 days, 21 days and 28
It when, fracture width measures respectively.Fracture width measurement result is listed in table 2.As seen from Table 2, the common coagulation of control group
The crack self-healing ability of soil is very weak, substantially unchanged with the extension fracture width of curing time, and fills outside self-repair function
Add the concrete of agent not only fine to gap (being less than 0.2mm) selfreparing effect, to also being showed compared with wide seam (being more than 0.3mm)
Very strong crack autogenous healing ability is gone out；Compared with Example 1, water imbibition tree in self-repair function additive used in embodiment 2
Fat increases, and the crack autogenous healing ability of concrete further enhances.
The proportioning of the concrete of table 1
Fracture width changes during the concrete curing that the embodiment 1,2 of table 2 is prepared with control group
Embodiment 3
A kind of concrete self-repair function additive, is prepared via a method which：Weigh 53 parts of polybasic ion complexing agent, carbon
Sour hydrogen Ca45 part, acrylic acid-acrylamide 3 parts of water-absorbing resins of copolymerization, add mechanical agitation 5min in mixer, obtain coagulation
Native self-repair function additive.
Embodiment 4
A kind of concrete self-repair function additive, is prepared via a method which：Weigh 57 parts of polybasic ion complexing agent, carbon
Sour 40 parts of hydrogen calcium, acrylic acid-acrylamide 3 parts of water-absorbing resins of copolymerization, add mechanical agitation 5min in mixer, obtain coagulation
Native self-repair function additive.
Cement, rubble, miberal powder, sand, water, water reducer and embodiment 3 are weighed by the quality proportioning of table 3 or prepared by embodiment 4
Concrete self-repair function additive.First rubble, sand, miberal powder, cement and self-repair function additive addition concrete are stirred
Mix and 30s is mixed in machine, water reducer and water are then added into stirrer for mixing 120s, that is, be made with crack autogenous healing function
Concrete；The concrete self-repair function additive is not added in control group, other conditions are identical.
Self-repair concrete and control group concrete to above-mentioned preparation carry out freezing-thawing damage selfreparing and crack certainly respectively
Recovery test：
(1) self-repair concrete and each part of control group concrete are taken, is separately added into 100mm × 100mm × 100mm's
In mould, it is stripped after 1 day, is put into fog room and conserves 28 days, is taken out test specimen and carried out 300 times according to national standard GB/T50082-2009
Frozen-thawed cycled at a slow speed, Frozen-thawed cycled take out test specimen, water seasoning 28 days (watering in every 4 days is once), test Frozen-thawed cycled after terminating
The compression strength of test specimen after front and rear and water seasoning.Compression strength is before the self-repair concrete Frozen-thawed cycled of embodiment 3
59.3MPa, compression strength is 50.4MPa after Frozen-thawed cycled, compression strength 55.0MPa after water seasoning；Embodiment 4 reviews one's lessons by oneself compound
Compression strength is 61.1MPa before coagulating native Frozen-thawed cycled, and compression strength is 51.2MPa after Frozen-thawed cycled, pressure resistance after water seasoning
Spend for 57.6MPa；Compression strength is 57.5MPa before contrast groups concrete Frozen-thawed cycled, and compression strength is after Frozen-thawed cycled
42.7MPa, compression strength 44.2MPa after water seasoning.Test result again shows that：Normal concrete (control group) follows through freeze thawing
Internal injury caused by ring does not heal substantially after conserving 28 days, and the concrete for filling self-repair function additive follows through freeze thawing
Internal injury is repaired very well after maintenance caused by ring；Compared with Example 3, used in embodiment 4 outside self-repair function
Polybasic ion complexing agent content in agent is added to increase, the internal injury self-reparing capability of concrete is further improved.
(2) self-repair concrete and each part of control group concrete are taken, pours into concrete flat slab cracking resistance mould respectively
In, vibrate it is floating after blow 4h with fan immediately, keep concrete sample center wind speed be not less than 5m/s, split concrete generation
Seam, is measured to incipient crack, is then carried out water seasoning (watering in every 4 days is once), is conserved to 7 days, 14 days, 21 days and 28
It when, fracture width measures respectively.Fracture width measurement result is listed in table 4.From table 4, the common coagulation of control group
Native fracture width is substantially unchanged, and embodiment 3 and the distress in concrete reparation mixed with function additive prepared by embodiment 4
Ability is significantly improved.Compared with Example 3, polybasic ion complexing agent contains in self-repair function additive used in embodiment 4
Amount increases, and the crack autogenous healing ability of concrete is further enhanced, and also has to more than 0.7mm crack and reviews one's lessons by oneself reactivation
Power.
The proportioning of the concrete of table 3
Fracture width changes during the concrete curing that the embodiment 3,4 of table 4 is prepared with control group
Embodiment 5
A kind of concrete self-repair function additive, is prepared via a method which：Weigh 40 parts of polybasic ion complexing agent, carbon
Sour 50 parts of hydrogen calcium, acrylic acid-acrylamide 5 parts of water-absorbing resins of copolymerization；By the polybasic ion complexing agent weighed, calcium bicarbonate,
Water-absorbing resins add mechanical mixture 5min in mixer, that is, obtain concrete self-repair function additive.
Embodiment 6
A kind of concrete self-repair function additive, is prepared via a method which：Weigh 60 parts of polybasic ion complexing agent, carbon
Sour 30 parts of hydrogen calcium, acrylic acid-acrylamide 1 part of water-absorbing resins of copolymerization；By the polybasic ion complexing agent weighed, calcium bicarbonate,
Water-absorbing resins add mechanical mixture 5min in mixer, that is, obtain concrete self-repair function additive.
Obviously, above-described embodiment is only intended to clearly illustrate made example, and is not the limitation to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change or change therefore amplified
Move within still in the protection domain of the invention.
Claims (7)
1. a kind of concrete self-repair function additive, it is characterised in that by polybasic ion complexing agent, calcium bicarbonate, water imbibition
Resin, which is mixed with, to be formed, and each raw materials by weight portion is calculated as：40~60 parts of polybasic ion complexing agent, calcium bicarbonate 40~50
Part, 1~5 part of water-absorbing resins.
2. concrete self-repair function additive according to claim 1, it is characterised in that the polybasic ion complexing agent
Molecular structural formula be：
Wherein n is 2 or 3, and molecular weight is between 280~430Da.
3. concrete self-repair function additive according to claim 1, it is characterised in that the polybasic ion complexing agent
Gained is prepared by the following method：Maleic anhydride and deionized water are added in band condensation reflux unit reactor, while stirring
Side heating is mixed, after maleic anhydride all dissolving, 90~95 DEG C is warming up to, adds aqueous hydrogen peroxide solution, isothermal reaction
After a period of time, add sodium hydroxide solution and continue to react, after reaction terminates, product is spray-dried to obtain polybasic ion network
Mixture.
4. concrete self-repair function additive according to claim 3, it is characterised in that each original in the preparation method
Material is calculated by weight as：100 parts of maleic anhydride, 100 parts of deionized water, 30 parts of aqueous hydrogen peroxide solution, sodium hydroxide
100 parts of solution；The volumetric concentration of the aqueous hydrogen peroxide solution is 25%~35%, the molar concentration of the sodium hydroxide solution
For 0.1mol/L~0.15mol/L.
5. concrete self-repair function additive according to claim 3, it is characterised in that constant temperature in the preparation method
The time of reaction is 3h~5h, adds sodium hydroxide solution and continues to react 1h~2h.
6. concrete self-repair function additive according to claim 1, it is characterised in that the water-absorbing resins are third
Olefin(e) acid-acrylamide copolymerization water-absorbing resins, water absorbent rate is 100~300.
7. the preparation method of any concrete self-repair function additive of claim 1~6, it is characterised in that including such as
Lower step：1) 40~60 parts of polybasic ion complexing agent, 30~50 parts of calcium bicarbonate, water suction are weighed by the ratio of weight and number of each raw material
1~5 part of resin of property；2) 30~50 parts of 40~60 parts of polybasic ion complexing agent, calcium bicarbonate, the water-absorbing resins 1~5 that will be weighed
Mechanical mixture 5min in part addition mixer, that is, obtain concrete self-repair function additive.
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Application publication date: 20180327 Assignee: Shenzhen Liyichen Waterproof Technology Co.,Ltd. Assignor: WUHAN University OF TECHNOLOGY Contract record no.: X2024980000716 Denomination of invention: A self repairing functional admixture for concrete and its preparation method Granted publication date: 20200114 License type: Exclusive License Record date: 20240116 |
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