CN107540329A - Quick-hardening cement based self-leveling mortar - Google Patents

Quick-hardening cement based self-leveling mortar Download PDF

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Publication number
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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China
Prior art keywords
quick
self
leveling mortar
cement
hardening cement
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Pending
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CN201710880782.6A
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Chinese (zh)
Inventor
赵明伟
司政凯
陈晓飞
张亚楠
曹林方
黄永恒
苏向东
李阳
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HENAN XIAN NEW BUILDING MATERIALS Co Ltd
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HENAN XIAN NEW BUILDING MATERIALS Co Ltd
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Priority to CN201710880782.6A priority Critical patent/CN107540329A/en
Publication of CN107540329A publication Critical patent/CN107540329A/en
Pending legal-status Critical Current

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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

Quick-hardening cement based self-leveling mortar
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.
CN201710880782.6A 2017-09-26 2017-09-26 Quick-hardening cement based self-leveling mortar Pending CN107540329A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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

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CN105272104A (en) * 2015-06-17 2016-01-27 杭州正博新型建筑材料有限公司 Self-leveling floor mortar and preparation method thereof
CN106396586A (en) * 2016-08-15 2017-02-15 青岛博威特建材有限公司 Cement-based self-levelling abrader mortar
CN106673580A (en) * 2016-12-30 2017-05-17 北京宝辰联合科技股份有限公司 Cement-based self-leveling mortar

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CN102432255A (en) * 2011-09-29 2012-05-02 成都嘉新科技集团有限公司 Cement-based self-leveling mortar
CN102432255B (en) * 2011-09-29 2013-01-02 成都嘉新科技集团有限公司 Cement-based self-leveling mortar
CN102850030A (en) * 2012-08-17 2013-01-02 苏州市德莱尔建材科技有限公司 Cement-based self-leveling dry-mixed mortar
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Cited By (3)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20180105