CN107540329A - Quick-hardening cement based self-leveling mortar - Google Patents
Quick-hardening cement based self-leveling mortar Download PDFInfo
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- CN107540329A CN107540329A CN201710880782.6A CN201710880782A CN107540329A CN 107540329 A CN107540329 A CN 107540329A CN 201710880782 A CN201710880782 A CN 201710880782A CN 107540329 A CN107540329 A CN 107540329A
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- based self
- cement based
- leveling mortar
- hardening cement
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Abstract
The invention discloses a kind of quick-hardening cement based self-leveling mortar, by weight percentage including following component：Portland cement 16% 24%, aluminate cement 12% 16%, gypsum 6% 8%, calcium silicates 0.5% 2%, re-dispersible glue powder 0.5% 2%, sand 40% 50%, retarder 0.2 0.4%, early strength agent 0.1 0.35%, cellulose ether 0.08% 0.12%, water reducer 0.15% 0.35%, defoamer 0.1% 0.2%, surplus is powdered whiting.Quick levelling work can be carried out, the open hour extend to 40 50min, add the operation engineering time for reserving mortar for one's own use, can meet the lasting construction requirement of large area；Can be with quick-hardening, intensity can is up to standard within 4h, improves efficiency of construction.
Description
Technical field
The present invention relates to a kind of gravity flowing levelling mortar, more particularly to a kind of quick-hardening cement based self-leveling mortar.
Background technology
Traditional construction method of ground is firstly the need of levelling control line is played, in order to facilitate artificial overall floating, general ground
The design thickness of mortar is all in more than 25mm.Then need to prepare plain cement and swept with besom or other instruments and apply ground, form one
Layer binder course.After layer solidification to be combined, stirring mortar carries out Manual work, it is combined with basic unit closely knit.Finally to enter
The press polish of row surface, press polish typically divide twice, for the first time when cement setting is slightly turned one's coat, spread dry cement and are compacted with plasterer's trowel
Troweling, treat to carry out second time press polish before cement mortar final set.After 24 hours, follow-up maintenance work is also carried out, one day
Water drenching is no less than 2 times, and curing time is no less than 7 days.This traditional floor leveling mode, price is relatively low, using comparing
Extensively.But ground flat degree is highly dependent upon artificial skill, and levelling thickness is very big, efficiency of construction is very low.In large area
Overall Shunping County's degree in ground surface works it is difficult to ensure that ground, and ground quality should not control, easily occur dusting, graying,
The quality problems such as hollowing cracking, directly affect the perception, using effect and service life on ground.
As the improvement of people's living standards, ground is as building one of important part, traditional ground is not
Can meet the needs of people, particularly the laying of some PVC floors, timber floor, polyurethane floor, the requirement to ground flat degree
Higher, traditional ground mortar is extremely difficult to the levelling precision of demand.It is difficult that the appearance of cement self-leveling solves this well
Topic, it is made up of various active composition, and after scene adds water to stir, being poured into ground can be voluntarily levelling, and in the short time
One layer of hard, bright and clean, smooth terrace of interior formation.The construction of Self-leveling is very simple, it usually needs three steps.First step base
, it is necessary to polish off the too high projection of terrace, larger crack and breakage need first to be repaired with mortar for the processing on plinth ground,
Then the debris on ground and floating ash are swept off.Second step applies priming in basic unit, prevents ground from excessively absorbing water, can also increase gravity flow
Flat mortar and ground binding ability.3rd step adds water to stir gravity flowing levelling mortar in proportion, is directly poured into ground rake teeth slightly
The thickness of the gentle control Self-leveling construction of auxiliary flow, then carry out physics deflation with defoaming roller.One can be formed after 24h
Hard, the smooth terrace of layer, now can be carried out follow-up construction.The levelling thickness of gravity flowing levelling mortar is very thin typically to exist
Between 3-5mm, the use of raw material is largely saved, and the utilization rate of interior construction spacing can be improved.Gravity flowing levelling mortar
Spreading speed is very fast, general manually two workers of stirring, can carry out 30-50m within one hour2Pave, and machinery is poured and applied
Work is more rapid, and two workers can carry out 200-350m with unification hour2The work that paves.
Cement-based self-leveling material has good mobility and stability, and the flatness being finally reached is can not manually to compare
Intend, and it is fast to construct, and labor intensity is low, and ground intensity is high, and levelling thickness is easily controlled, is not likely to produce cracking, is especially suitable for
For megastore, supermarket, parking lot, warehouse, cinema, hospital, pavement, precision instrument workshop, pharmaceutical factory workshop
Etc. commercial or industrial ground.
In the prior art the open hour of Self-leveling within 20-30 minutes, within this period mortar can keep compared with
Good fluidity, can carry out constructing operation；And firm time generally requires one day or so, follow-up ground dress could be carried out
Decorations construction.The open hour of Self-leveling of the prior art are too short, and firm time is oversize, it is difficult to tackle large area casual labourer's phase class work
The construction requirement of journey.
Therefore, it is necessary to prior art is improved to solve above-mentioned technical problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of quick-hardening cement based self-leveling mortar, when can extend open
Between to increase the operable time of self-leveling cement, accelerate the setting rate of cement.It is real in particular by following technical scheme
It is existing：
The quick-hardening cement based self-leveling mortar of the present invention, by weight percentage including following component：Portland cement
16%-24%, aluminate cement 12%-16%, gypsum 6%-8%, calcium silicates 0.5%-2%, re-dispersible glue powder 0.5%-
2%th, sand 40%-50%, retarder 0.2-0.4%, early strength agent 0.1-0.35%, cellulose ether 0.08%-0.12%, water reducer
0.15%-0.35%, defoamer 0.1%-0.2%, surplus are powdered whiting.
Further, the gypsum be without water anhydrite, dihydrate gypsum, αsemiwatergypsum, β semi-hydrated gypsums one or more.
Further, the re-dispersible glue powder is EVA, the one or two of acrylic-type latex powder.
Further, clay content≤2% of the sand, and mesh number is in 70-140 mesh.
Further, the retarder is tartaric acid, sodium gluconate, the one or more of sodium citrate.
Further, the early strength agent is lithium carbonate, the one or two of calcium formate.
Further, the cellulose ether is hydroxyethyl ether cellulose, the one or two of hydroxypropyl methyl cellulose.
Further, the viscosity of the cellulose ether is between 200-400Mpas.
Further, the water reducer is polycarboxylic acid, the one or more of naphthalene water reducer.
Further, the mesh number of the powdered whiting is 300-400 mesh.
Beneficial effects of the present invention：The quick-hardening cement based self-leveling mortar of the present invention, quick levelling work can be carried out, is opened
Time lengthening is put to 40-50min, the operation engineering time for reserving mortar for one's own use is added, the lasting construction requirement of large area can be met；
Can be with quick-hardening, intensity can is up to standard within 4h, improves efficiency of construction；Other beneficial effects of the present invention will combine down
It is further detailed in literary specific embodiment.
Embodiment
The present invention is further detailed with reference to specific embodiment.
The preparation method of quick-hardening cement based self-leveling mortar described in above-described embodiment, it is specially：Each raw material is taken in proportion, is mixed
It can be prepared by after closing uniformly.Amount of water is the 23~25% of powder during use.
The performance of quick-hardening cement based self-leveling mortar, the tool of the quick-hardening cement based self-leveling mortar obtained by above-described embodiment
Body index includes 40 minutes fluidities and the anti-foldings of 4h, compression strength, laboratory reference《JCT985-2005 ground cement base is flow automatically
Flat mortar》.It is as follows to measure specific performance：
In above-described embodiment, Portland cement strength grade is purchased from Zhengzhou Cement Co., Ltd of Tianrui for 425；Aluminic acid
Salt cement is purchased from China Changcheng Aluminium Industry Co's cement field, model CA50；Calcium silicates is ordinary commercial products；Re-dispersible glue powder
Purchased from the good building materials Science and Technology Ltd. in Jiangsu million, model 6020；Retarder is NP50, purchased from the happy limited public affairs of nation's building materials in Zhengzhou
Department；Defoamer is purchased from Beijing treasured occasion joint Science and Technology Co., Ltd., model PD356, effectively can reduce in gravity flowing levelling mortar
The unstable bubble in portion, improves the self compacting ability of Self-leveling, while gravity flowing levelling mortar can be made to have preferable surface effect.
In the present embodiment, the no water anhydrite replaces with the dihydrate gypsum of equivalent part, αsemiwatergypsum, β semi-hydrated gypsums
One or more, acquired results no significant difference.
In the present embodiment, the re-dispersible glue powder 6020 replaces with the EVA of equivalent part, the one of acrylic-type latex powder
Kind or two kinds, acquired results no significant difference.
In the present embodiment, clay content≤2% of the sand, and mesh number is in 70-140 mesh, acquired results no significant difference.
In the present embodiment, the retarder NP50 replaces with the tartaric acid of equivalent part, sodium gluconate, the one of sodium citrate
Kind or several, acquired results no significant difference.
In the present embodiment, the early strength agent lithium carbonate is purchased from Beijing treasured occasion joint Science and Technology Co., Ltd., calcium formate purchase
From Beijing Fu Teen Science and Technology Ltd.s.
In the present embodiment, the cellulose ether is purchased from Beijing treasured occasion joint Science and Technology Co., Ltd., model MP-A200,
Replace with the hydroxyethyl ether cellulose, the one or two of hydroxypropyl methyl cellulose of equivalent part, acquired results no significant difference.
In the present embodiment, the viscosity of the cellulose ether is between 200-400Mpas.With viscosity be 200~
400Mpas low-viscosity cellulose ether, it can both prevent Self-leveling from excreting water phenomenon occurs and ensures its water stability, again will not shadow
Ring the fluidity of gravity flowing levelling mortar.
In the present embodiment, the water reducer is respectively that the PC1030 that Suzhou makes the country prosperous and Australia's Chinese contain river chemical industry (Beijing) limited public affairs
The SC-11A of department, replace with the polycarboxylic acid, the one or more of naphthalene water reducer of equivalent part, acquired results no significant difference.
In the present embodiment, the mesh number of the powdered whiting is 300-400 mesh.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (10)
1. a kind of quick-hardening cement based self-leveling mortar, it is characterised in that by weight percentage including following component：Normal silicate
Cement 16%-24%, aluminate cement 12%-16%, gypsum 6%-8%, calcium silicates 0.5%-2%, re-dispersible glue powder
0.5%-2%, sand 40%-50%, retarder 0.2-0.4%, early strength agent 0.1-0.35%, cellulose ether 0.08%-0.12%,
Water reducer 0.15%-0.35%, defoamer 0.1%-0.2%, surplus are powdered whiting.
2. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The gypsum is anhydrous admant
Cream, dihydrate gypsum, αsemiwatergypsum, the one or more of β semi-hydrated gypsums.
3. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The re-dispersible glue powder is
EVA, acrylic-type latex powder one or two.
4. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：Clay content≤2% of the sand,
And mesh number is in 70-140 mesh.
5. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The retarder be tartaric acid,
The one or more of sodium gluconate, sodium citrate.
6. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The early strength agent be lithium carbonate,
The one or two of calcium formate.
7. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The cellulose ether is ethoxy
The one or two of cellulose ether, hydroxypropyl methyl cellulose.
8. quick-hardening cement based self-leveling mortar according to claim 7, it is characterised in that：The viscosity of the cellulose ether exists
Between 200-40000Mpas.
9. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The water reducer is polycarboxylic acids
Class, the one or more of naphthalene water reducer.
10. quick-hardening cement based self-leveling mortar according to claim 1, it is characterised in that：The mesh of the powdered whiting
Number is 300-400 mesh.
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| CN201710880782.6A CN107540329A (en) | 2017-09-26 | 2017-09-26 | Quick-hardening cement based self-leveling mortar |
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| CN201710880782.6A CN107540329A (en) | 2017-09-26 | 2017-09-26 | Quick-hardening cement based self-leveling mortar |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424170A (en) * | 2018-05-22 | 2018-08-21 | 四川省劲腾环保建材有限公司 | Flexible mortar and preparation method thereof for being bonded light partition wall |
| WO2020043644A1 (en) | 2018-08-29 | 2020-03-05 | Akzo Nobel Coatings International B.V. | Dry powder composition, putty composition obtainable from such composition, and substrate coated with such putty composition |
| CN111606676A (en) * | 2019-06-21 | 2020-09-01 | 中建材创新科技研究院有限公司 | High-water-retention gypsum self-leveling material and preparation method thereof |
| CN112266222A (en) * | 2020-10-27 | 2021-01-26 | 安徽皖维花山新材料有限责任公司 | Cushion layer self-leveling rubber powder premix and cushion layer self-leveling mortar based on same |
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| CN112266222A (en) * | 2020-10-27 | 2021-01-26 | 安徽皖维花山新材料有限责任公司 | Cushion layer self-leveling rubber powder premix and cushion layer self-leveling mortar based on same |
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