CN108516718A - A kind of anti-cracking concrete enhancing additive and preparation method thereof - Google Patents
A kind of anti-cracking concrete enhancing additive and preparation method thereof Download PDFInfo
- Publication number
- CN108516718A CN108516718A CN201810612156.3A CN201810612156A CN108516718A CN 108516718 A CN108516718 A CN 108516718A CN 201810612156 A CN201810612156 A CN 201810612156A CN 108516718 A CN108516718 A CN 108516718A
- Authority
- CN
- China
- Prior art keywords
- anhydrous
- concrete
- powder
- polyester fiber
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
Abstract
A kind of anti-cracking concrete enhancing additive and preparation method thereof, constituent is anhydrous ρ aluminium oxide, metallic aluminium powder, modified short polyester fiber, anhydrous calcined kaolin, calcium oxide powder, preparation method is that anhydrous calcined kaolin, the calcium oxide powder that will be measured are uniformly mixed, it is hybrid packed that it is put into packaging bag jointly with modified short polyester fiber, the anhydrous ρ aluminium oxide measured individually packs, the metallic aluminium powder measured individually packs, and three packagings, which are put into packaging in a packing material, is made finished product；The use of step is quickly to stir evenly the mixture of anhydrous ρ aluminium oxide and anhydrous calcined kaolin, calcium oxide powder, modified short polyester fiber, it is uniformly added into water-bearing concrete and stirs after stirring, metallic aluminium powder is put into nonmetallic vessel again, is added after water stirs to add in concrete together with water and stir.
Description
Technical field
The present invention relates to a kind of additives and preparation method thereof of anti-cracking concrete enhancing, belong to building material technology neck
Domain.
Background technology
Concrete is to use most common silicates construction material, and concrete is in use since self performance often goes out
Existing crack causes concreting structures the problem of strength reduction, cracking leakage etc. seriously affect construction quality occur.Coagulation
Crack producing cause in soil, in addition to material and water quality reason, it is important to the energy quantitative change for the grain structure that crystallization process generates
Change.Cement is clinker mainly by tricalcium silicate (3CaOSiO2), dicalcium silicate (β -2CaOSiO2), tricalcium aluminate
(3CaO·Al2O3) and tetra calcium aluminoferrite (4CaOAl2O3·Fe2O3) four kinds of mineral compositions, hydration process initial stage is one
Endergonic process forms the fibrous tiny crystals of hydrated calcium silicate CSH (B), then lasting hydration process crystal is constantly grown up
It forms close structure to the cement solidifies, the residue that will appear energy again in this process needs constantly to release, release
Energy transmits benign combination that is uneven, and inhibiting crystal with the binding site of concrete structure, construct, generates stress not
Uniform crack hidden danger is easy for crack occur using stress and the temperature environment variation of process.
The existing technology path for enhancing concrete anticracking additive, widely applied there are two directions.When water-reducing agent,
The reason of effusion of the gas that water and aquation are generated in concrete is as crack is generated, by reducing the water in concrete
Amount reduces the thermogenetic gas effusion of aquation.Second is that addition fiber, be mainly used for being added has steel fibre, polyester fiber, the Black Warrior
Rock fiber etc., fiber are furnished with silico-calcium powder inorganic matter again, are reacted in concrete and play the role of structure enhancing pair.This two classes skill
Art route, without solving the problems, such as that concrete hydrating causes crack to the energy of process of setting.The technology path of waterproofing agent is added
Be inorganic salts and gypsum that calcium chloride, iron chloride, organosilicon, aliphatic acid etc. play expansion, these materials are subtracting
It is waterborne to work, but the effect for reducing quality is played on material, and also the chlorine, the element sulphur that are added also affect crystalline solid
Consistency.The technology path of fiber addition can enable crystal do orderly shape along fiber and change in concrete primary crystallization
Into crystallographic texture, and by systems such as cement same sex materials such as calcium oxide, zinc oxide, titanium oxide, aluminium oxide, silica
That makees is finer, the surface energy of powder is improved increasing specific surface area, as the powder body material of additive, at the beginning of hydration process
Phase can generate larger crystal structure, but cannot effectively solve energy requirement and energy surplus of the initial stage when crystallizing too small and make
At stress crack.
Invention content
The present invention prevents crack after providing a kind of addition to the aquation process of setting of concrete, and water proofing property and intensity carry
The preparation method of high additive and anti-cracking concrete enhancing additive.The constituent of the additive of the present invention presses matter
Amount part is calculated as：
40 parts of anhydrous ρ aluminium oxide；
5-10 parts of metallic aluminium powder；
Modified 30 parts of short polyester fiber；
20 parts of anhydrous calcined kaolin
15-25 parts of calcium oxide powder
Anhydrous 45 μm of ρ aluminum oxide grain sizes ＜ in additive；Metallic aluminium powder is ball aluminum powder, granularity 22 μm to 45 μm it
Between, and metal aluminum content ＞ 99.2%；Modified short polyester fiber is length in 15-20 μm of 4-12cm, diameter, with alkyl aluminum to poly-
Ester fiber carries out surface modification treatment and generates active organic aluminium base functional group；Anhydrous calcined kaolin purity ＞ 75%, granularity
Range is between 30 μm to 75 μm；The granularity of calcium oxide powder is between 5 μm to 15 μm.
The preparation method of the anti-cracking concrete enhancing additive of the present invention is the anhydrous calcined kaolin that will be measured, oxidation
Calcium powder is uniformly mixed, and is put into that packaging bag is hybrid packed jointly with modified short polyester fiber, and the anhydrous ρ aluminium oxide measured is individually close
Package fills, and the metallic aluminium powder measured individually packs, and three packagings, which are put into packaging in a packing material, is made finished product.
The present invention anti-cracking concrete enhancing additive use step be：By anhydrous ρ aluminium oxide and anhydrous calcining kaolinite
Soil, calcium oxide powder, modified short polyester fiber mixture quickly stir evenly, whipping process is under dry environment, after stirring
It is uniformly added into water-bearing concrete and stirs；Metallic aluminium powder is put into nonmetallic vessel, 40-60 DEG C of water is added, after stirring with
Water is added in concrete stirs together.Additive amount of this additive in concrete is 1m3Concrete adds 1.2kg.
The mechanism of action that additive enhances anticracking in concrete in the present invention is：By the soda acid difference of aluminium, mixed
The lasting variation that " aluminium-aluminum oxide-meta-aluminate-aluminate hyrate-aluminosilicate crystals " is carried out in solidifying soil, improves aquation
The crystallization energy at initial stage, absorbs the excess energy in aquation later stage, and the energy release that abatement generates concrete crack generates crack
Condition.The large specific surface area, surface energy of anhydrous ρ aluminium oxide are high in the process, can be reacted with water generate hyrate at normal temperatures
Gibbsite and boehmite gel, and can be with the formation of cement and its aggregate together with anhydrous calcined kaolin, calcium oxide powder
Silico-calcium gel, calcium aluminosilicate gel, calcium metaaluminate active colloidal containing larger crystal aquation etc..Metallic aluminium powder is stirred with hot water
The process of mixing, which reacts, starts to generate the mixture of aluminium hydroxide hydrated colloidal, ρ aluminium oxide and metallic aluminium powder, and releases hydrogen
Gas is added the crystallization energy that stirs and can increase in coagulation dust gelatin in concrete, increases the object of tiny solid phase particle
Reason gravitation makes bonding be tightly formed spatial networks coherent structure, promotes crystal increasing and the gas quick release at concrete initial stage,
And it avoids generating false set.Also the silicon in aquation and concrete, calcium generate aluminium for the aluminium base functional group of modified polyester fibre surface
Gel of calcium silicate simultaneously forms colloidal crystal along fiber, improves the intensity of the structure in the concrete initial stage plasticity stronger time.
Aquation carries out process and is bonded together closely as hydration reaction accelerates and new, more stable hyrate crystal generation is precipitated
After crystalline texture, undersaturated metallic aluminium powder, ρ aluminium oxide, colloidal aluminium hydroxide proceed by reacting again for energy-absorbing, with water and
Silicon, calcium constituent form closer diaspore calcium aluminosilicate, calcium aluminate structure, reduce aquation energy in concrete and discharge
Caused by stress increase and it is unbalanced, reduce the condition in crack, more enhance the hardness of concrete.The additive of the present invention increases
The binding force at strong cement and aggregate interface, improves the crystallization energy at aquation initial stage, absorbs the excess energy in aquation later stage, abatement production
The energy release in growing concrete crack generates the condition in crack, improves the crystalline texture intensity of concrete and from close property, plays
The effect of anticracking enhancing, and do not add water-reducing agent.
Specific implementation mode
Specific implementation is illustrated in conjunction with example, the present invention is not limited to the example ranges.
Example 1
Take the anhydrous calcined kaolin 200g of purity ＞ 75%, particle size range between 30 μm to 75 μm, granularity at 5 μm extremely
Calcium oxide 200g between 15 μm, the short polyester fiber 300g that length is modified in 4-12cm, 15 μm of diameter, surface layer alkyl aluminum, three
It is packed after being uniformly mixed stirring.The anhydrous ρ aluminium oxide 400g of 45 μm of granularity ＜ is taken individually to pack spare.Take granularity at 22 μm
To between 45 μm, and the spherical metal aluminium powder 100g of metal aluminum content ＞ 99.2% individually pack it is spare.
Take 1m3The concrete of portland cement in stirring.By anhydrous ρ aluminium oxide with anhydrous calcined kaolin, calcium oxide
Powder, the mixture for being modified short polyester fiber quickly stir evenly, and whipping process keeps drying.After stirring evenly, by mixture into
It is uniformly added into the 1m stirred3In concrete, and persistently stir evenly.Metallic aluminium powder is gradually added to 50 DEG C of the clear water of 2L
In, it stirs while adding, is uniformly added into the mixed liquor of metallic aluminium powder and water after addition in the concrete stirred, protect
Normal stirring is held to pouring.
Example 2
The anhydrous calcined kaolin 200g of purity ＞ 75%, particle size range between 40 μm to 60 μm is taken, granularity is at 10 μm
Calcium oxide 250g between to 15 μm, the short polyester fiber 300g that length is modified in 6-10cm, 10 μm of diameter, surface layer alkyl aluminum, three
Person packs after being uniformly mixed stirring.The anhydrous ρ aluminium oxide 400g of 40 μm of granularity ＜ is taken individually to pack spare.Take granularity 25
μm between 35 μm, and the spherical metal aluminium powder 50g of metal aluminum content ＞ 99.2% individually pack it is spare.
Take 1m3The concrete of aluminosilicate cement in stirring.By anhydrous ρ aluminium oxide with anhydrous calcined kaolin, oxidation
Calcium powder, the mixture for being modified short polyester fiber quickly stir evenly, and whipping process keeps drying.After stirring evenly, by mixture
Into being uniformly added into the 1m stirred3In concrete, and persistently stir evenly.Metallic aluminium powder is gradually added to the clear of 60 DEG C of 2L
It in water, stirs while adding, is uniformly added into the mixed liquor of metallic aluminium powder and water after addition in the concrete stirred,
Keep normal stirring to pouring.
Claims (4)
1. a kind of anti-cracking concrete enhancing additive and preparation method thereof, it is characterised in that constituent is in parts by mass：
40 parts of anhydrous ρ aluminium oxide；
5-10 parts of metallic aluminium powder；
Modified 30 parts of short polyester fiber；
20 parts of anhydrous calcined kaolin
15-25 parts of calcium oxide powder
Preparation method is that anhydrous calcined kaolin, the calcium oxide powder that will be measured are uniformly mixed, common with modified short polyester fiber
It is put into that packaging bag is hybrid packed, the anhydrous ρ aluminium oxide measured individually packs, and the metallic aluminium powder measured individually seals packet
Three packagings are put into packaging in a packing material and finished product are made by dress；
The use of step is that anhydrous ρ aluminium oxide and anhydrous calcined kaolin, calcium oxide powder, the mixture of modified short polyester fiber is fast
Speed stirs evenly, and is uniformly added into water-bearing concrete and stirs after stirring, then metallic aluminium powder is put into nonmetallic vessel, is added
40-60 DEG C of water is added in concrete together with water after stirring and stirs.
2. a kind of anti-cracking concrete enhancing additive according to claim 1 and preparation method thereof, it is characterised in that anhydrous ρ
45 μm of aluminum oxide grain size ＜；Metallic aluminium powder is ball aluminum powder, and granularity is between 22 μm to 45 μm, and metal aluminum content ＞
99.2%；Modified short polyester fiber is length in 15-20 μm of 4-12cm, diameter, carries out surface to polyester fiber with alkyl aluminum and changes
Property processing generate active organic aluminium base functional group；Anhydrous calcined kaolin purity ＞ 75%, particle size range is at 30 μm to 75 μm
Between；The granularity of calcium oxide powder is between 5 μm to 15 μm.
3. a kind of anti-cracking concrete enhancing additive according to claim 1 and preparation method thereof, it is characterised in that anhydrous ρ
The mixture of aluminium oxide and anhydrous calcined kaolin, calcium oxide powder, modified short polyester fiber is stirred under dry environment.
4. a kind of anti-cracking concrete enhancing additive according to claim 1 and preparation method thereof, it is characterised in that addition
Additive amount of the agent in concrete is 1m3Concrete adds 1.2kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810612156.3A CN108516718A (en) | 2018-06-14 | 2018-06-14 | A kind of anti-cracking concrete enhancing additive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810612156.3A CN108516718A (en) | 2018-06-14 | 2018-06-14 | A kind of anti-cracking concrete enhancing additive and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108516718A true CN108516718A (en) | 2018-09-11 |
Family
ID=63427564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810612156.3A Pending CN108516718A (en) | 2018-06-14 | 2018-06-14 | A kind of anti-cracking concrete enhancing additive and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108516718A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111646726A (en) * | 2020-06-04 | 2020-09-11 | 江苏汉普顿新材料科技有限公司 | Seed crystal material for reducing concrete autogenous cracks and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108027A (en) * | 2011-03-23 | 2011-06-29 | 江苏省一夫新材料科技有限公司 | Cement mortar for constructional engineering |
| CN102531452A (en) * | 2010-12-10 | 2012-07-04 | 苏笮斌 | Anti-corrosion anti-cracking reinforcing agent composition and preparation method thereof |
| JP2017052909A (en) * | 2015-09-11 | 2017-03-16 | ユニチカ株式会社 | Anchor coat agent for transparent vapor deposition and laminate |
| CN107935419A (en) * | 2017-12-12 | 2018-04-20 | 常州明华运输有限公司 | A kind of modified steel scoria cement |
-
2018
- 2018-06-14 CN CN201810612156.3A patent/CN108516718A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531452A (en) * | 2010-12-10 | 2012-07-04 | 苏笮斌 | Anti-corrosion anti-cracking reinforcing agent composition and preparation method thereof |
| CN102108027A (en) * | 2011-03-23 | 2011-06-29 | 江苏省一夫新材料科技有限公司 | Cement mortar for constructional engineering |
| JP2017052909A (en) * | 2015-09-11 | 2017-03-16 | ユニチカ株式会社 | Anchor coat agent for transparent vapor deposition and laminate |
| CN107935419A (en) * | 2017-12-12 | 2018-04-20 | 常州明华运输有限公司 | A kind of modified steel scoria cement |
Non-Patent Citations (3)
| Title |
|---|
| 崔京浩等: "《第十五届全国结构工程学术会议论文集 第3册》", 31 August 2006, 《工程力学》杂志社 * |
| 李凯琦等: "《风化型高岭土深加工技术》", 30 June 2017, 中国建材工业出版社 * |
| 韩行禄等: "《不定形耐火材料》", 30 June 1994, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111646726A (en) * | 2020-06-04 | 2020-09-11 | 江苏汉普顿新材料科技有限公司 | Seed crystal material for reducing concrete autogenous cracks and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4746429B2 (en) | Spraying method using spraying material | |
| KR101621022B1 (en) | Single-phase hydraulic binder, methods for the production thereof and structural material produced therewith | |
| JPH027911B2 (en) | ||
| CA2693441C (en) | Monophase hydraulic binder, manufacturing method thereof and building material made using the same | |
| US5228913A (en) | Compositions which set in the presence of water, their use and method for producing molded articles from such compositions | |
| CN107257778A (en) | The binding agent of the solid inorganic compound rich in alkaline earth oxide with phosphoric acid salt activator | |
| US10494300B2 (en) | Concrete compositions and method for making same | |
| CN104395263A (en) | Method for forming a quickly hardening, inorganic foam | |
| JPS59227794A (en) | Ceramic fiber composition | |
| KR101116346B1 (en) | Blast furnace slag cement synthetic method and blast furnace slag cement produced by this method | |
| CN108516718A (en) | A kind of anti-cracking concrete enhancing additive and preparation method thereof | |
| TW470732B (en) | Wet type spray refractory coating composition | |
| EP2874971A1 (en) | Setting and hardening accelerators in powder form for sprayed concrete | |
| CN107311580A (en) | A kind of common self-leveling material of bottom | |
| JP6110749B2 (en) | Crushed material | |
| KR101941677B1 (en) | Refractory adhesive composition for repair and reinforcement | |
| EP1680376A2 (en) | Accelerator for hydraulic binder | |
| JP5192106B2 (en) | Spraying method | |
| CN107311498A (en) | A kind of entringite stabilizer and preparation method thereof | |
| CN109322455A (en) | It is formed with the thistle board of coat of plaster | |
| JP4657417B2 (en) | Cement quick-setting agent | |
| CN108821616A (en) | A kind of cement for construction in sea and its production method | |
| CN107709268B (en) | Alkali-free aluminium sulphate-based shotcrete accelerators as stable suspensions or in redispersible solid form | |
| CN112638844A (en) | Curing agent for concrete composition and method for curing concrete composition | |
| JPH09301756A (en) | Quick setting agent, spraying material and spraying method using them |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180911 |