CN107311511A - A kind of anti-crack building grout additive and preparation method thereof - Google Patents
A kind of anti-crack building grout additive and preparation method thereof Download PDFInfo
- Publication number
- CN107311511A CN107311511A CN201710742361.7A CN201710742361A CN107311511A CN 107311511 A CN107311511 A CN 107311511A CN 201710742361 A CN201710742361 A CN 201710742361A CN 107311511 A CN107311511 A CN 107311511A
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- China
- Prior art keywords
- mortar
- flyash
- water
- grout additive
- crack
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Classifications
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of anti-crack building grout additive and preparation method thereof, include the raw material of following percentage by weight：Flyash 50 60%, vermiculite power 10 20%, hydroxypropyl methyl cellulose 2 5%, polypropylene fibre 1 4%, air entraining agent 0.5 0.8%, redispersable latex powder 3 8%, water 10 15%.Reasonable mixture ratio of the present invention, preparation technology are simple, when obtained additive is used for mortar, and solve mortar in terms of water-retaining property and heat insulating ability two shrinks problem caused by dehydration and the temperature difference, the generation for fundamentally preventing mortar from ftractureing.The present invention also solves the problem of mortar workability is poor, cohesive force is low, shrinkage factor is big and isolates simultaneously.
Description
Technical field
The invention belongs to building mortar technical field, and in particular to a kind of anti-crack building grout additive and its preparation side
Method.
Background technology
The difference of building mortar and concrete is to be free of coarse aggregate, by binder materials, fine aggregate and water by certain ratio
Example is formulated.Building mortar is usually used in building by laying bricks or stones masonry (such as brick, stone, building block) structure, building surfaces externally and internally (as metope,
Face, ceiling) wipe one's face, bonding of large wall panel, the jointing of masonry walls, and ornament materials etc..
The problem of existing building mortar generally existing crack resistance is with impervious difference, easily causes metope cracking, flakes and ooze
Leakage so that mortar durability is greatly affected.It is that dehydration causes drying shrinkage in hydration process to cause the reason for mortar ftractures, and
The shrinkage as caused by the temperature difference.In addition, the tensile strength of mortar is small, limit elongation is low and poor water retention property causes isolation etc. all can
Mortar is caused to ftracture.
The content of the invention
It is an object of the invention to：The problem of for above-mentioned existing building mortar crack resistance difference, the present invention provides a kind of anti-
Cracking building mortar additive and preparation method thereof.
The technical solution adopted by the present invention is as follows：
A kind of anti-crack building grout additive, includes the raw material of following percentage by weight：Flyash 50-60%, vermiculite power
10-20%, hydroxypropyl methyl cellulose 2-5%, polypropylene fibre 1-4%, air entraining agent 0.5-0.8%, redispersable latex powder
3-8%, water 10-15%.
The additive of the present invention is using flyash as main component, and fly ash grain is in porous type cellular tissue, compares surface
Product is larger, and with higher adsorption activity, and Zhu Bi has loose structure, and porosity is up to 50%-80%, there is very strong suction
It is aqueous.Vermiculite power is the expanded vermiculite after high-temperature roasting, and pore is numerous, and each pore, which possesses, strong moisture absorption
Effect, water absorbing capacity is strong, and is layer structure, and interlayer filling water molecule layer only can be just dehydrated, water conservation under the high temperature conditions
Ability is strong, and vermiculite power and flyash can significantly increase the water-retaining property of mortar together, effectively alleviates in mortar hydration process because of dehydration
Caused drying shrinkage problem, can prevent screed from ftractureing.In addition, expanded vermiculite has excellent thermal and insulating performance, be conducive to making
Mortar is within the scope of stable temperature, that is, is significantly reduced mortar because the temperature difference causes the possibility of shrinkage, can further be prevented sand
Slurry cracking.
Flyash also helps the consumption for saving cement and fine aggregate in mortar, reduces water consumption, improvement mortar and easy
Property, reduce mortar and creep, reduce the heat of hydration, improve the impermeability etc. of mortar.
Hydroxypropyl methyl cellulose in additive of the present invention can increase substantially mortar as thickener, water-loss reducer
Viscosity, extend mortar the water conservation time, improve mortar application property, the anti-sag ability of reinforced mortar, meanwhile, auxiliary is prevented
Screed ftractures.Air entraining agent can reduce mortar bleeding and isolation, improve the homogenieity of mortar, can be with hydroxypropyl methyl cellulose one
Rising prevents mortar segregation, it is to avoid the mortar caused by isolation ftractures.
The polypropylene fibre of the present invention has excellent resilience, can increase the tensile property of mortar, reduces shrinkage factor, prevents
Only mortar ftractures.Redispersable latex powder can improve the weatherability, mobility and plasticity of mortar, reduce the cold and hot temperature difference of mortar and draw
The shrinkage factor risen, extends the life-span of mortar.
Further, the raw material of following percentage by weight is included：Flyash 57%, vermiculite power 18%, hydroxypropyl methyl are fine
Dimension element 4%, polypropylene fibre 2%, air entraining agent 0.6%, redispersable latex powder 5.4%, water 13%.
Further, the particle diameter of flyash is 20-100 mesh.
Further, air entraining agent is lauryl sodium sulfate.
A kind of preparation method of anti-crack building grout additive, comprises the following steps：
(1) raw material is weighed by proportioning；
(2) after polypropylene fibre is crushed, together with hydroxypropyl methyl cellulose, vermiculite power and flyash send into dry powder and stir
Mix in machine and stir, obtain mixed powder；
(3) water stirring is added in the mixed powder obtained to step (2), adds air entraining agent and redispersable latex powder is mixed
It is even, produce the anti-crack building grout additive.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：Reasonable mixture ratio of the present invention, system
Standby technique is simple, when obtained additive is used for mortar, solved in terms of water-retaining property and heat insulating ability two mortar because of dehydration and
Contraction problem caused by the temperature difference, the generation for fundamentally preventing mortar from ftractureing.The present invention simultaneously also solve mortar workability it is poor,
The problem of cohesive force is low, shrinkage factor is big and isolates.
Embodiment
All features disclosed in this specification, can be with any in addition to mutually exclusive feature and/or step
Mode is combined.
Embodiment 1
A kind of preparation method of anti-crack building grout additive, comprises the following steps：
(1) raw material is weighed by proportioning：Flyash 57%, vermiculite power 18%, hydroxypropyl methyl cellulose 4%, polypropylene are fine
Dimension 2%, lauryl sodium sulfate 0.6%, redispersable latex powder 5.4%, water 13%；
(2) after polypropylene fibre is crushed, together with hydroxypropyl methyl cellulose, vermiculite power and flyash send into dry powder and stir
Mix in machine and stir, obtain mixed powder；
(3) water stirring is added in the mixed powder obtained to step (2), adds air entraining agent and redispersable latex powder is mixed
It is even, produce the anti-crack building grout additive.
Embodiment 2
A kind of preparation method of anti-crack building grout additive, comprises the following steps：
(1) raw material is weighed by proportioning：Flyash 60%, vermiculite power 15%, hydroxypropyl methyl cellulose 2%, polypropylene are fine
Dimension 3%, lauryl sodium sulfate 0.5%, redispersable latex powder 4.5%, water 15%；
(2) after polypropylene fibre is crushed, together with hydroxypropyl methyl cellulose, vermiculite power and flyash send into dry powder and stir
Mix in machine and stir, obtain mixed powder；
(3) water stirring is added in the mixed powder obtained to step (2), adds air entraining agent and redispersable latex powder is mixed
It is even, produce the anti-crack building grout additive.
Embodiment 3
A kind of preparation method of anti-crack building grout additive, comprises the following steps：
(1) raw material is weighed by proportioning：Flyash 53%, vermiculite power 20%, hydroxypropyl methyl cellulose 5%, polypropylene are fine
Dimension 4%, lauryl sodium sulfate 0.8%, redispersable latex powder 6.2%, water 11%；
(2) after polypropylene fibre is crushed, together with hydroxypropyl methyl cellulose, vermiculite power and flyash send into dry powder and stir
Mix in machine and stir, obtain mixed powder；
(3) water stirring is added in the mixed powder obtained to step (2), adds air entraining agent and redispersable latex powder is mixed
It is even, produce the anti-crack building grout additive.
Embodiment 4
Additive made from 1-3 of the embodiment of the present invention is added in decorative mortar for 3.0% by mass percentage respectively and made
For experimental group 1-3, the decorative mortar of additive is not added with as blank group, experimental group 1-3 and blank group decorative mortar is equal
It is applied to evenly on metope, mortar smearing thickness is consistent, natural drying.Detected after one month, experimental group is not opened
Split, and there are fine cracks in blank group, properties see the table below.
| Project | Compression strength (MPa) | Adhesion strength (MPa) | Water retention (%) | Shrinkage factor (‰) |
| Blank group | 10 | 0.6 | 65 | 1.5 |
| Experimental group 1 | 15 | 1.0 | 89.4 | 0.45 |
| Experimental group 2 | 18 | 1.2 | 90.5 | 0.48 |
| Experimental group 3 | 16 | 0.9 | 91.2 | 0.41 |
It is embodiments of the invention as described above.The present invention is not limited to the above-described embodiments, anyone should learn that
The structure change made under the enlightenment of the present invention, the technical schemes that are same or similar to the present invention each fall within this
Within the protection domain of invention.
Claims (5)
1. a kind of anti-crack building grout additive, it is characterised in that include the raw material of following percentage by weight：Flyash 50-
60%th, vermiculite power 10-20%, hydroxypropyl methyl cellulose 2-5%, polypropylene fibre 1-4%, air entraining agent 0.5-0.8%, can be again
Dispersed latex powder 3-8%, water 10-15%.
2. a kind of anti-crack building grout additive according to claim 1, it is characterised in that including following percentage by weight
Raw material：Flyash 57%, vermiculite power 18%, hydroxypropyl methyl cellulose 4%, polypropylene fibre 2%, air entraining agent 0.6%, can
Redisperse latex powder 5.4%, water 13%.
3. a kind of anti-crack building grout additive according to claim 1 or 2, it is characterised in that the grain of the flyash
Footpath is 20-100 mesh.
4. a kind of anti-crack building grout additive according to claim 1 or 2, it is characterised in that the air entraining agent is ten
Sodium dialkyl sulfate.
5. the preparation method of anti-crack building grout additive as described in any one in a kind of 1-4 such as claim, it is characterised in that
Comprise the following steps：
(1) raw material is weighed by proportioning；
(2) after polypropylene fibre is crushed, powder stirrer is sent into together with hydroxypropyl methyl cellulose, vermiculite power and flyash
In stir, obtain mixed powder；
(3) water stirring is added in the mixed powder obtained to step (2), adds air entraining agent and redispersable latex powder is mixed thoroughly,
Produce the anti-crack building grout additive.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742361.7A CN107311511A (en) | 2017-08-25 | 2017-08-25 | A kind of anti-crack building grout additive and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710742361.7A CN107311511A (en) | 2017-08-25 | 2017-08-25 | A kind of anti-crack building grout additive and preparation method thereof |
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| CN107311511A true CN107311511A (en) | 2017-11-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603444A (en) * | 2021-09-10 | 2021-11-05 | 山西大学 | Solid waste base dry-mixed mortar and preparation method thereof |
| CN115677263A (en) * | 2022-11-28 | 2023-02-03 | 信丰华轩建材有限公司 | Preparation method of composite dry-mixed mortar additive |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649635A (en) * | 2012-03-08 | 2012-08-29 | 南通岩艺涂装科技有限公司 | Inorganic thermal insulation mortar powder and preparation method thereof |
| CN104086141A (en) * | 2014-07-21 | 2014-10-08 | 俞权锋 | Architectural dry-mixing plastering mortar and preparation method thereof |
-
2017
- 2017-08-25 CN CN201710742361.7A patent/CN107311511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649635A (en) * | 2012-03-08 | 2012-08-29 | 南通岩艺涂装科技有限公司 | Inorganic thermal insulation mortar powder and preparation method thereof |
| CN104086141A (en) * | 2014-07-21 | 2014-10-08 | 俞权锋 | Architectural dry-mixing plastering mortar and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603444A (en) * | 2021-09-10 | 2021-11-05 | 山西大学 | Solid waste base dry-mixed mortar and preparation method thereof |
| CN115677263A (en) * | 2022-11-28 | 2023-02-03 | 信丰华轩建材有限公司 | Preparation method of composite dry-mixed mortar additive |
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Application publication date: 20171103 |