CN107698219A - A kind of thick-layer gravity flowing levelling mortar - Google Patents
A kind of thick-layer gravity flowing levelling mortar Download PDFInfo
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- CN107698219A CN107698219A CN201710726337.4A CN201710726337A CN107698219A CN 107698219 A CN107698219 A CN 107698219A CN 201710726337 A CN201710726337 A CN 201710726337A CN 107698219 A CN107698219 A CN 107698219A
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- Prior art keywords
- thick
- gravity flowing
- flowing levelling
- levelling mortar
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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
- 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
-
- 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
Abstract
The invention discloses a kind of thick-layer gravity flowing levelling mortar, including binder materials, sand, additive, the dry-mixed gravity flowing levelling mortar that the normal intensity that the mortar meets gravity flowing levelling mortar is C25, and when pouring 4cm thickness, bleeding does not isolate mortar, being capable of self-leveling, and surface effect is good, cost is low, has economic benefit.
Description
Technical field
The invention belongs to field of mortar, more particularly to a kind of thick-layer gravity flowing levelling mortar.
Background technology
Now with the needs of Self-leveling market development, thick-layer self-leveling cement mortar turns into a kind of trend and pushed away rapidly
Set up in a wide range and.Thick-layer self-leveling cement mortar constructs thickness between 5mm~50mm.It is coagulated by cement base or anhydrite base rubber
Material, fine aggregate, filler and additive composition, there is mobile performance Automatic Levelling after being stirred with water (or emulsion) or slightly spread out
Paving is with regard to the levelling ground material of energy.The subject matter that thick-layer gravity flowing levelling mortar faces now is due to the thickness mistake to be poured
Greatly, while higher fluidity is kept, bleeding and isolation are easily caused, and for the early stage of thick-layer gravity flowing levelling mortar
Intensity requirement is higher.Simultaneously as it is big to pour thickness, cause volume big, aquation inequality is easily caused, so as to cause Self-leveling
The aquation shrinkage cracking of mortar, contraction problem are gravity flowing levelling mortar urgent problems, present common gravity flowing levelling mortar
Generally by adding anhydrite, expanded using anhydrite and hydrated cementitious to make up the contraction of cement.But for thick-layer certainly
Research of the levelling mortar about this respect is also fewer, and this is current urgent problem.
Due to the less varieties of domestic cement flooring self-leveling material, cause to study being obstructed for cement-based self-leveling mortar, because
This studies a kind of good rheological property, the thick-layer gravity flowing levelling mortar that physical and mechanical property is strong, cost-effective has very necessary meaning
Justice, meet selection and the demand of building trade.
The content of the invention
In view of the defects of above-mentioned prior art is present, the purpose of the present invention is to propose to a kind of thick-layer gravity flowing levelling mortar, the sand
Slurry meet gravity flowing levelling mortar normal intensity be C25 dry-mixed gravity flowing levelling mortar, and mortar when pouring 4cm thickness not bleeding not from
Analysis, can self-leveling, and surface effect is good, and cost is low, has economic benefit.
The purpose of the present invention will be achieved by the following technical programs：
A kind of thick-layer gravity flowing levelling mortar, including binder materials, sand, additive.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, the binder materials include anhydrite, sulphur aluminium cement and silicate cement
Mud.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, the binder materials and the amount ratio of the sand are 1.34-
1.36。
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, the additive includes water reducer, HPMC, air entraining agent, defoaming
Agent, inorganic thickening agent, thinner, retarder and grey calcium.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, it is any that the retarder is selected from tartaric acid, sodium gluconate
Or its combination.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, the volume of the water reducer is the 0.18%- of binder materials
0.22%, it is preferable that the volume of the water reducer is the 0.20% of binder materials；The volume of the HPMC is binder materials
0.10%-0.12%.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, air entraining agent accounts for the 0.0025% of binder materials and sand total amount,
Defoamer accounts for the 0.2% of binder materials and sand total amount, and inorganic thickening agent accounts for the 0.8% of binder materials and sand total amount, viscosity reduction
Agent accounts for the 0.2% of binder materials and sand total amount, and retarder accounts for the 0.7% of binder materials and sand total amount.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, the inorganic thickening agent is selected from bentonite, Silica hydrogel or silicic acid
Magnalium is any.
A kind of above-mentioned thick-layer gravity flowing levelling mortar, wherein, the grey calcium volume is the sulphur aluminium cement and anhydrite volume
More than the 0.7% of total amount.
Water reducer of the present invention excessively easily causes isolation and bleeding, HPMC has good effect for the water-keeping thickening of mortar
Fruit, volume increase, fluidity reduce；Air entraining agent can increase fluidity；It is not bright to fluidity without water hickener aluminium-magnesium silicate
Aobvious influence, and the surface effect of mortar can be improved；Thinner can improve the bleeding and isolation problem of mortar；Air entraining agent and
Aluminium-magnesium silicate and thinner can be overlapped mutually, and not interacted；Anhydrite and the ratio of sulphur aluminium cement and portland cement
For 13/42/100 when, more have higher early strength, and along with the expansion of volume, compensate the contraction of mortar；Retarder is
Tartaric acid keeps having good effect with sodium gluconate compounding use to the fluidity of mortar, improves early strength；Grey calcium
Addition can improve early strength.
Compared with prior art, a kind of thick-layer gravity flowing levelling mortar provided by the invention, what is reached has the technical effect that：This hair
The bright research by various components and the different addition quantity of different component, determine work of each component in gravity flowing levelling mortar
With and performance, select preferable component and volume, make gravity flowing levelling mortar when thick-layer is poured still have preferably flowing
Degree, can there is preferable workability；The content of sand, plays a part of aggregate in increase formula；Increase the thickness of Self-leveling
With intensity simultaneously, increase the content of sulphur aluminium cement and anhydrite, entringite expansion character complementary contraction is generated by hydration reaction
Caused cracking；Reach simultaneously in the case of compared with high fluidity, ensure the effect that bleeding does not isolate, make thick-layer Self-leveling
The effect instead of crushed stone concrete can be reached, save engineering time and cost.
Below just in conjunction with the embodiments, the embodiment of the present invention is described in further detail, so that technical scheme is more
It should be readily appreciated that, grasp.
Embodiment
Below by specific embodiment, the present invention will be described, but the invention is not limited in this.In following embodiments
The experimental method, it is conventional method unless otherwise specified；The reagent and material, unless otherwise specified, can be from business
Industry approach obtains, example below and the scope of the claims for being not used to the limitation present invention, all equivalent realities without departing from carried out by the present invention
Apply or change, be intended to be limited solely by the scope of this patent.
Material：Cement is selected from conch board PII42.5 cement；Sulphur aluminium cement is selected from without Sillim's hawk sulphur aluminium cement；Sand is selected from
50-80 mesh sands；Southern extra best best anhydrite is selected from without water anhydrite；Water reducer makes the country prosperous polycarboxylate water-reducer selected from Suzhou；
HPMC-MK400 is selected from day and contains the cellulose ether that viscosity is 400；Defoamer is selected from bright icepro defoamer P803；Tartaric acid is selected from Hangzhoupro
The precious brilliant tartaric acid in state；Commercial glucose saccharic acid sodium.
A kind of composition of thick-layer gravity flowing levelling mortar of embodiment 1
Cement 371kg；Sulphur aluminium cement 156kg；Without water anhydrite 48kg；Sand 425kg；Water reducer 1.15kg；HPMC
0.63kg；Air entraining agent 0.0025kg；Defoamer 0.2kg；Aluminium-magnesium silicate 0.8kg；Thinner 0.2kg；Sodium gluconate
0.15kg；Tartaric acid 0.55kg；Grey calcium 14kg.
Embodiment 2 selects the optimal proportion of aluminium-magnesium silicate
A. by taking embodiment 1 as an example, the ratio for changing aluminium-magnesium silicate is reserved for one's own use with studying the aluminium-magnesium silicate of different addition quantity to thick-layer
The fluidity of flat mortar influences
Influence of the aluminium-magnesium silicate volume of table 1 to fluidity
By table 1, it is apparent that the increase of the volume with inorganic thickening agent aluminium-magnesium silicate, fluidity do not drop
It is low also not raise, therefore fluidity not obvious influence of the aluminium-magnesium silicate for gravity flowing levelling mortar；And present invention research
Inorganic thickening agent aluminium-magnesium silicate is to the effect on gravity flowing levelling mortar surface, it is apparent that inorganic thickening agent aluminium-magnesium silicate pair
There is significant effect in the surface for improving thick-layer gravity flowing levelling mortar, effect is best when volume is 0.6%, while
It was found that inorganic thickening agent aluminium-magnesium silicate also can effectively improve to the bleeding isolation problem of mortar, section is without obvious
Layering, therefore inorganic thickening agent aluminium-magnesium silicate can effectively improve bleeding and isolation problem and improve thick-layer Self-leveling sand
The surface of slurry, and 0.6% volume is more suitable.
B, optimization of the aluminium-magnesium silicate to thick-layer gravity flowing levelling mortar surface
The surface of gravity flowing levelling mortar will have superior flatness, and smooth exquisiteness is wanted on surface, it is impossible to there is the bubble much heaved,
Therefore, the optimization to gravity flowing levelling mortar surface just seems particularly significant.From experiment above, aluminium-magnesium silicate be it is a kind of very
Good thixotropic agent, the fluidity for neither changing mortar advantageously account for the bleeding and isolation problem of mortar again.Meanwhile magnesium silicate
Aluminium has good effect of optimization to the surface of thick-layer gravity flowing levelling mortar, and therefore, the aluminium-magnesium silicate for choosing different addition quantity is respectively
0.6th, 0.8,1.0 and 1.2% material optimizes to the surface of thick-layer gravity flowing levelling mortar, with the increase of aluminium-magnesium silicate volume,
The stomata on the surface of thick-layer gravity flowing levelling mortar gradually decreases, and color is closer to the script color of cement, when volume is 0.8%
When, surface pores is minimum, and effect is preferable, therefore selects the volume of aluminium-magnesium silicate to be used as 0.8% to thick-layer gravity flowing levelling mortar table
The optimization in face.
In summary, aluminium-magnesium silicate can have while fluidity is not changed to the surface of thick-layer gravity flowing levelling mortar
Good effect of optimization, for volume at 0.8%, effect is preferable.
Influence of the different slow setting components of embodiment 3 to thick-layer gravity flowing levelling mortar performance
The present embodiment is based on the forming of the thick-layer gravity flowing levelling mortar of embodiment 1, change sodium gluconate, the ratio of tartaric acid
Example studies influence of the different slow setting components to thick-layer gravity flowing levelling mortar performance.
For sodium gluconate as retarder when being used alone, effect is not it is obvious that generally being carried out with other retarder
Compounding use, meanwhile, sodium gluconate also has certain water-reducing effect, therefore in the case where keeping former water consumption constant
The fluidity of mortar can be improved.Therefore, when being compounded with tartaric acid, the total amount of appropriate reduction retarder is
0.70% prevents bleeding and isolation.Because influence of the grape sodium carbonate to fluidity is more sensitive, therefore, test with 0.05%
The gradually content of increase sodium gluconate, until the tartaric acid of substitution 0.7% completely.Experimental result see the table below 2-1, table 2-2.
Influence of the table 2-1 sodium gluconates volume to fluidity
Influence of the table 2-2 sodium gluconates volume to fluidity
With the increase of sodium gluconate volume, the flowing of thick-layer gravity flowing levelling mortar it can be seen from table 2-1, table 2-2
Degree present one first rise after downward trend, this is due to that to have certain water reducer be action effect to sodium gluconate, few
The sodium gluconate of amount is advantageous to increase the fluidity of thick-layer gravity flowing levelling mortar, and when sodium gluconate volume is excessive,
Diminishing reaches saturation, it is impossible to which continuing increases Mortar'S Flowability has a small amount of reduction, and the volume that sodium gluconate is excessive on the contrary
Easily cause the bleeding and isolation of mortar.From the holding of fluidity, when sodium gluconate volume is less than 0.2%
There is one preferably to keep to fluidity, but when the volume of sodium gluconate is more than 0.2%, cannot be good
Keep fluidity, the fluidity loss of 20 minutes is excessive, in real work progress may without enough engineering times,
Therefore the volume of sodium gluconate is selected to be less than 0.2%.
According to same ratio, its intensity is tested, experimental result is shown in Table 3.
Influence of the sodium gluconate volume of table 3 to intensity
Because rupture strength changes unobvious, but the trend that changes with sodium gluconate volume of rupture strength and resistance to compression
Intensity is similar, but studies influence of the sodium gluconate volume to the compression strength of different larval instar in table, it is known that with
The increase of sodium gluconate volume, the compression strength of each age are presented the trend risen after falling before, work as gluconic acid
Intensity is higher when the volume substitution value of sodium reaches 0.15%, and the strength development for later stage 3d and 7d does not have large effect,
Comprehensive rheological property analysis, the influence to fluidity when the volume of sodium gluconate is less than 0.20% is smaller, therefore,
The value of present invention selection sodium gluconate substitution tartaric acid is optimal for 0.15%.
Optimization of the 4 grey calcium of embodiment to early strength
For thick-layer gravity flowing levelling mortar, early strength is very important to gravity flowing levelling mortar, is that can determine second day
The major criterion of construction, the main purpose for mixing grey calcium are to generate entringite with sulphur aluminium cement and anhydrite reaction, reaction, instead
Answer equation as follows： Therefore ash is mixed
The amount of calcium should be determined by total volume of sulphur aluminium cement and anhydrite.Choose the difference that grey calcium accounts for sulphur aluminium cement and anhydrite total amount
Ratio is studied, and the fluidity of thick-layer gravity flowing levelling mortar is influenceed to be shown in Table 4.
Influence of the grey calcium volume of table 4 to fluidity
Found out by table 4, with the addition of grey calcium, fluidity is presented one than shallower trend, but when the volume of grey calcium
When excessive, due to providing enough calcium ions, hydration process is very fast, therefore the holding for fluidity is not fine, institute
Should not add excessive grey calcium in the optimization to early strength, the volume of grey calcium should be less than sulphur aluminium cement and anhydrite
The 7% of volume sum.
Influence of the volume of grey calcium to early strength is studied with identical volume, experimental result is as follows
Influence of the grey calcium volume of table 5 to 1d intensity
As can be seen that with the increase of grey calcium volume, 1 day of mortar resists for influence of the volume to 1d intensity by 5 grey calcium of table
Compressive Strength and rupture strength, start that the trend of a rising is presented, be due at this time that grey calcium is sent out with sulphur aluminium cement and anhydrite
Raw reaction generation entringite, with the raising of grey calcium volume, entringite generates more and more, there is provided early strength, still
When the volume of grey calcium reaches the 7% of sulphur aluminium cement and anhydrite volume sum, continue to increase the volume of grey calcium, intensity
It has been tended towards stability that, without higher lifting, this is due to that sulphur aluminium cement or anhydrite have been consumed a lot,
Therefore intensity will not continue to be lifted.
In order to preferably study influence of the grey calcium to mortar later strength, choose the grey calcium of different addition quantity, to its three days and
The intensity of seven days is tested, as a result as shown in table 6 below.
Influence of the grey calcium volume of table 6 to 1d intensity
As can be seen from Table 6, with the increase of grey calcium volume, 3 days of thick-layer gravity flowing levelling mortar and 7 days compression strength are all
With rise, and compared with not mixing grey calcium, increased amplitude is larger, therefore, it follows that the admixture of grey calcium is advantageous to morning
The raising of phase intensity, excessive grey calcium also have greatly improved for the intensity in later stage, and 7d intensity is with the admixture of grey calcium
Continue to increase, but consider the influence of mobile performance, select higher intensity and the higher volume of fluidity, therefore select
The volume for selecting grey calcium accounts for sulphur aluminium cement and 7% pair of thick-layer gravity flowing levelling mortar of anhydrite total amount optimizes.
The performance test of the thick-layer gravity flowing levelling mortar of embodiment 5
According to standard JC/T-985-2005《Ground cement-based self-leveling mortar》, standard GB-50448-2008《Cement
Base grouting material application technology specification》, standard GB/T17671《Test method for strength of hydraulic cement mortar ISO methods》In pertinent regulations
Test performance is carried out to the thick-layer gravity flowing levelling mortar of embodiment 1, it is as a result as follows：Self-leveling standard initial flow degree is 150cm,
20min is 145cm, and grouting material standard initial flow degree is 380cm, 20min 350cm, the shrinkage factor of 28 days for-
0.038%, one day compression strength is 10.7MPa, and one day rupture strength is 3.8MPa.28 days compression strength is more than 25MPa, symbol
The normal intensity for closing gravity flowing levelling mortar is C25 dry-mixed gravity flowing levelling mortar, and when pouring 4cm thickness, bleeding does not isolate mortar,
Can self-leveling, and surface effect is good.
Some preferred embodiments of the present invention have shown and described in described above, but as previously described, it should be understood that the present invention
Form disclosed herein is not limited to, is not to be taken as the exclusion to other embodiment, and available for various other groups
Close, modification and environment, and can in the scope of the invention is set forth herein, by the technology of above-mentioned teaching or association area or
Knowledge is modified., then all should be and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of thick-layer gravity flowing levelling mortar, it is characterised in that including binder materials, sand, additive.
2. a kind of thick-layer gravity flowing levelling mortar according to claim 1, it is characterised in that the binder materials includes admant
Cream, sulphur aluminium cement and portland cement.
3. a kind of thick-layer gravity flowing levelling mortar according to claim 1, it is characterised in that the binder materials and the sand
Amount ratio be 1.34-1.36.
A kind of 4. thick-layer gravity flowing levelling mortar according to claim 1, it is characterised in that the additive include water reducer,
HPMC, air entraining agent, defoamer, inorganic thickening agent, thinner, retarder and grey calcium.
A kind of 5. thick-layer gravity flowing levelling mortar according to claim 4, it is characterised in that the retarder be selected from tartaric acid,
Sodium gluconate is any or it is combined.
6. a kind of thick-layer gravity flowing levelling mortar according to claim 4, it is characterised in that the volume of the water reducer is gelling
The 0.18%-0.22% of material, it is preferable that the volume of the water reducer is the 0.20% of binder materials；The volume of the HPMC
For the 0.10%-0.12% of binder materials.
7. a kind of thick-layer gravity flowing levelling mortar according to claim 4, it is characterised in that air entraining agent accounts for binder materials and sand
The 0.0025% of total amount, defoamer account for the 0.2% of binder materials and sand total amount, and inorganic thickening agent accounts for binder materials and sand is total
The 0.7-0.9% of amount, thinner account for the 0.1-0.3% of binder materials and sand total amount, and retarder accounts for binder materials and sand is total
The 0.7% of amount.
8. a kind of thick-layer gravity flowing levelling mortar according to claim 4, it is characterised in that the inorganic thickening agent is selected from swelling
Soil, Silica hydrogel or aluminium-magnesium silicate are any.
9. a kind of thick-layer gravity flowing levelling mortar according to claim 4, it is characterised in that the grey calcium volume is the sulphur aluminium
More than the 7% of cement and anhydrite volume total amount.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863274A (en) * | 2018-08-20 | 2018-11-23 | 重庆绿恒环保科技有限公司 | A kind of surfacing self-leveling floor mortar with conducting function |
| CN109265105A (en) * | 2018-10-15 | 2019-01-25 | 张家界万众新型建筑材料有限公司 | A kind of high-performance ground self-leveling dry-mixed mortar and application method |
| CN109354470A (en) * | 2018-11-21 | 2019-02-19 | 君旺节能科技股份有限公司 | Unitary system thick-layer gravity flowing levelling mortar and preparation method thereof |
| CN111039622A (en) * | 2019-12-23 | 2020-04-21 | 杭州墨泰科技股份有限公司 | Rapid-setting self-leveling mortar |
| CN111995348A (en) * | 2020-09-21 | 2020-11-27 | 中山蓝翠鸟新型环保材料有限公司 | Ternary system foaming leveling mortar |
| CN117125945A (en) * | 2023-10-24 | 2023-11-28 | 上海建工集团股份有限公司 | Engineering repair material with low viscosity and high stability and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863274A (en) * | 2018-08-20 | 2018-11-23 | 重庆绿恒环保科技有限公司 | A kind of surfacing self-leveling floor mortar with conducting function |
| CN108863274B (en) * | 2018-08-20 | 2021-03-30 | 重庆绿恒环保科技有限公司 | Surface layer self-leveling mortar with conductive function |
| CN109265105A (en) * | 2018-10-15 | 2019-01-25 | 张家界万众新型建筑材料有限公司 | A kind of high-performance ground self-leveling dry-mixed mortar and application method |
| CN109354470A (en) * | 2018-11-21 | 2019-02-19 | 君旺节能科技股份有限公司 | Unitary system thick-layer gravity flowing levelling mortar and preparation method thereof |
| CN111039622A (en) * | 2019-12-23 | 2020-04-21 | 杭州墨泰科技股份有限公司 | Rapid-setting self-leveling mortar |
| CN111995348A (en) * | 2020-09-21 | 2020-11-27 | 中山蓝翠鸟新型环保材料有限公司 | Ternary system foaming leveling mortar |
| CN117125945A (en) * | 2023-10-24 | 2023-11-28 | 上海建工集团股份有限公司 | Engineering repair material with low viscosity and high stability and preparation method thereof |
| CN117125945B (en) * | 2023-10-24 | 2024-02-02 | 上海建工集团股份有限公司 | Engineering repair material with low viscosity and high stability and preparation method thereof |
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Application publication date: 20180216 |