CN102826814A - Cement-based self-leveling mortar - Google Patents

Cement-based self-leveling mortar Download PDF

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Publication number
CN102826814A
CN102826814A CN2012103602047A CN201210360204A CN102826814A CN 102826814 A CN102826814 A CN 102826814A CN 2012103602047 A CN2012103602047 A CN 2012103602047A CN 201210360204 A CN201210360204 A CN 201210360204A CN 102826814 A CN102826814 A CN 102826814A
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mortar
cement
self
leveling
resistance
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CN102826814B (en
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杨建西
韩燕�
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HUNAN JIAOTAI BUILDING MATERIAL Co Ltd
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HUNAN JIAOTAI BUILDING MATERIAL Co Ltd
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Abstract

The invention relates to the field of building material, and in particular relates to cement-based self-leveling mortar, which takes sulphoaluminate cement as basic cementing material and quartz sand as aggregate, uses b-semi-hydrated gypsum to control the mortar not to contract and utilizes other additives to enable the prepared mortar to have the comprehensive performances required by the cement-based self-leveling mortar. The newly stirred mortar has the performances of high fluidity, self-leveling property, bleeding resistance and separation resistance; and the hardened mortar has the performances of shrink resistance, crack resistance, high surface hardness and good wear resistance. Compared with the existing self-leveling flooring mortar product with shrink resistance and crack resistance, the cement-based self-leveling mortar is low in production cost and wide in application scope.

Description

Cement-based self-leveling mortar
Technical field
The present invention relates to building materials field, be specifically related to a kind of cement-based self-leveling mortar.
Background technology
Cement-based material comprises sand-cement slurry and concrete, is the engineering materials that is widely used in ground.At present, the assurance terrace is smooth has with constructional method level:
(1) when concrete floor (base plate) is constructed, adopts the leveling of laser smoothing machine, troweling;
(2) on unfairness or out-of-level concrete floor, smear one deck mortar levelling layer.
Existing mortar working method commonly used is: use silicate series cement as gelling material; (particle diameter 0.160~4.75mm) is aggregate with sand to use common building; Use various admixtures such as water reducer (common, efficient or ultra-high efficiency), tackifier (ether of cellulose, rubber powder etc.), mineral admixture (flyash, breeze, silicon ash etc.); Prepare the mortar of various functions of use; For example masonry mortar, plastering mortar, thermal insulation mortar, waterproof mortar, mending mortar, decoration mortar, gravity flow self-leveling floor mortar, or the like.Commonly used mixing and stirring uses working method to be: directly preparing burden and stir in (1) scene, is fit to common performance mortar; (2) wet method premixing mortar is promptly mixed at stirring station and is made, and is transported to the working-yard and uses; (3) all dry mash dry mixing are even in factory, packing, the scene only adds the water stirring and just can use.High function, High Performance Mortar for the batching more complicated comprise insulation, waterproof, decoration, gravity flowing levelling mortar etc., generally adopt the plant produced dry-mixed mortar, to guarantee mortar quality and performance.
Adopt laser smoothing machine construction concrete floor or road surface, be suitable for large-area industry ground slab, level ground, station, airport or highway.Most indoor terraces or outdoor sclerosis floor construction mainly rely on artificial levelling, and labour intensity is big, and the levelling effect is decided by workman's state of the art, cannot say for sure to demonstrate,prove construction quality.At present, most gravity flowing levelling mortar products can only be used to level up the level leveling of layer because of the meeting shrinkage cracking on the market, can not be used for surface layer.Overcome in the mortar use self-constriction and dry shrinkage, be world-famous puzzle.At present, following technological line is arranged: (1) adopts silicate cement to prepare gravity flowing levelling mortar.Add swelling agent,, rely on swelling agent to produce spontaneous contraction and dry shrinkage that the expansion compensation cement hydrating hardening process produces like UEA, CSA or the like.But the mechanism of intumescence of these swelling agents is a moisture in the absorbing environmental, produces swelling property mineral (calcium hydroxide or ettringite), and promptly the expansible power resources are in ambient moisture.Therefore,, lack water supply, just can't produce expansion at dry environment.The expansion mineral that produce at wet environment early stage, the later stage is in dry environment, can decompose again, produces to shrink and cracking.Theory and practice all proves, the swelling agent strong to the water dependency only at lasting wet environment, can effectively prevent the contraction and the cracking of cement-based material; At the drying and watering cycle environment, anti-contraction effect of anti-cracking is unreliable; Then invalid fully at dry environment, in addition shrink with ftracture more serious.(2) adopt aluminate cement to prepare gravity flowing levelling mortar.At present, matured product all adopts this technological line in the world, utilizes the lower contraction of aluminate to prevent the crack, and the enterprise that develops this product has only two companies of Germany at present.But use aluminate cement to produce gravity flowing levelling mortar, technical difficulty is still higher, and is not to use mortar that aluminate cement makes just not to split.In addition, the price of aluminate cement is higher, uses the price of the gravity flowing levelling mortar product of aluminate cement making also to remain high, and has hindered its widespread use.Except the product of two enterprises of Germany, existing gravity flowing levelling mortar is as floor material, appearance crack that all can be in various degree during practical application.So the product of other companies on the market in fact only is suitable for the levelling of terrace bed course, is not suitable for surface layer.Though and two enterprise's gravity flowing levelling mortar floor materials of Germany have overcome crack problem well, there is the shortcoming that cost is high, cost is high, hindered its application.
Summary of the invention
The present invention is directed to above-mentioned deficiency, provide that a kind of production cost is low, the cement-based self-leveling mortar of applied range.
Cement-based self-leveling mortar provided by the invention comprises the material of following mass fraction: 100~200 parts of the silica sands of 100 parts of quick hardening sulphoaluminate cements, 0.080~0.325mm particle diameter, 15~25 parts of b – semi-hydrated gypsums, 2~5 parts of silicon ashes, 1~1.5 part of polycarboxylate water-reducer, viscosity are 0.2~0.6 part of 1~4 part of 0.01~0.05 part of ether of cellulose, latex powder, skimmer, 0.4~0.7 part of the retardant of 10000~50000 mPa * s.
As the further improvement of cement-based self-leveling mortar of the present invention, described cement-based self-leveling mortar also comprises the lithium salts class hardening accelerator that is not higher than 0.3 part.
The mix method of use of cement-based self-leveling mortar provided by the invention, identical with existing mortar mix method of use, the amount of the mixing water that mixes when difference is mix is 35~55 parts.
The present invention adopts quick hardening sulphoaluminate cement as basic gelling material, realizes the mortar setting and harden, reaches intensity and wear resisting property that terrace mortar needs; Use silica sand as aggregate, improve volume stability, intensity, the wear resistance of mortar; Use the b-semi-hydrated gypsum, make aluminosulfate cement setting and harden process produce irreversible microdilatancy, promptly be exposed to dry environment after the sclerosis and can not produce contraction and crack; Use the powdery polycarboxylate water-reducer, it is mobile to improve mortar, realizes that self-leveling can; Use silicon ash, ether of cellulose and latex powder, regulate mortar viscosity and water retention capacity, guarantee high workability, gravity flowing levelling mortar not bleeding, do not emanate, sclerosis back quality uniformity improves the cohesive strength of gravity flowing levelling mortar and base material simultaneously; Use the powdery skimmer, guarantee mortar in plastic state, bubble can be got rid of fast, prevents that bubble and pore from appearring in the gravity flowing levelling mortar surface, guarantees that surfacing is smooth; Use Powdered retardant to regulate the time of coagulation of aluminosulfate cement, guarantee the operable time of mortar; Use hardening accelerator to improve strength development.The present invention is basic gelling material with aluminosulfate cement; With silica sand as aggregate; Do not shrink with b – semi-hydrated gypsum control mortar; With other functional chemical admixture; Make the mortar of preparation possess the over-all properties of requirement, newly mix performance comprise high workability, self-leveling can, suitable operable time and exhaust bubble performance fast, Hardenability comprise not shrinkage cracking, higher-strength and higher wear resisting property (surface hardness) thus make new sand cutting slurry of the present invention have high workability, from levelling, not bleeding, do not emanate; The sclerosis mortar does not shrink, does not ftracture, surface hardness is high, wear resisting property is good.Do not shrink indehiscent gravity flow self-leveling floor mortar product and compare with existing; The raw material aluminosulfate cement that the present invention uses; Price can reach existing and not shrink 1/4~1/10 of aluminate cement cost of material that indehiscent gravity flow self-leveling floor mortar uses, and product performance are identical.With aluminosulfate cement is basic gelling material; With silica sand as aggregate; Do not shrink with b – semi-hydrated gypsum control mortar,, make the mortar of preparation possess the over-all properties of requirement with other functional chemical admixture; Newly mix performance comprise high workability, self-leveling can, suitable operable time and exhaust bubble performance fast, Hardenability comprises shrinkage cracking not, higher intensity and wear resisting property (surface hardness).Therefore product of the present invention can reduce production costs significantly, thereby can use more widely.Mortar of the present invention can be used for the terrace surface layer because can shrinkage cracking, comprises the maintenance of new terrace levelling and surface decoration and level ground, once visited place or renovates, thereby enlarged the range of application of gravity flowing levelling mortar.
Embodiment
In order further to understand the present invention, below explain with embodiment.Need to prove that following examples only as enumerating, should not be regarded as the restriction to scope of the present invention.
Mixing water consumption when the raw material composition of the cement based terrace mortar of each embodiment of embodiment and use is seen table 1; The performance that new sand cutting slurry after the cement based terrace mortar of different embodiment mixed and stirred records and see table 2 with the service condition of the terrace of its acquisition, wherein the degree of mobilization testing method is seen GB/T 50448-2008 " cement-based grouting material utilisation technology standard " appendix A .0.2; Operable time when degree of mobilization was for construction in 30 minutes; The intensity test method is seen GB/T 50448-2008 " cement-based grouting material utilisation technology standard " appendix A .0.4; Vertical rate of expansion, elliptical ring split test testing method are seen GB/T 50448-2008 " cement-based grouting material utilisation technology standard " appendix A .0.5, and surface hardness adopts Mohs'hardness scale to measure.
Mixing water consumption (consumption unit is part) when the raw material composition of the cement based terrace mortar of each embodiment of table 1 and use
The performance that new sand cutting slurry after the cement based terrace mortar of table 2 couple different embodiment mixes and stirs records and with the service condition of the terrace of its acquisition.

Claims (3)

1. cement-based self-leveling mortar, comprise the material of following mass fraction: 100~200 parts of the silica sands of 100 parts of quick hardening sulphoaluminate cements, 0.080~0.325mm particle diameter, 15~25 parts of b – semi-hydrated gypsums, 2~5 parts of silicon ashes, 1~1.5 part of polycarboxylate water-reducer, viscosity are 0.2~0.6 part of 1~4 part of 0.01~0.05 part of ether of cellulose, latex powder, skimmer, 0.4~0.7 part of the retardant of 10000~50000 mPa * s.
2. cement-based self-leveling mortar as claimed in claim 1 is characterized in that: also comprise the lithium salts class hardening accelerator that is not higher than 0.3 part.
3. the mix method of use of a cement-based self-leveling mortar according to claim 1 or claim 2, the amount of the mixing water that mixes during mix is 35~55 parts.
CN201210360204.7A 2012-09-25 2012-09-25 Cement-based self-leveling mortar Active CN102826814B (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103467046A (en) * 2013-08-28 2013-12-25 句容联众科技开发有限公司 Polymer cement mortar and preparation method thereof
CN104108918A (en) * 2014-06-19 2014-10-22 广东省建筑科学研究院 High performance cement-base self-leveling mortar
CN105016678A (en) * 2015-07-08 2015-11-04 水利部交通运输部国家能源局南京水利科学研究院 High-early-strength cement-based filling material for semi-flexible composite pavements
CN105060831A (en) * 2015-08-03 2015-11-18 四川好途程科技有限公司 Seamless self-leveling cement millstone and preparation method therefor
CN105464230A (en) * 2015-11-25 2016-04-06 江苏尼高科技有限公司 Floor slab heat insulation and sound isolation system and construction method of floor slab heat insulation and sound isolation system
CN105622029A (en) * 2015-12-25 2016-06-01 江苏蓝圈新材料有限公司 Cement-based self-leveling mortar
CN106587877A (en) * 2016-12-06 2017-04-26 长沙万工机器人科技有限公司 High-hardness cementitious self-leveling mortar
CN107540329A (en) * 2017-09-26 2018-01-05 河南兴安新型建筑材料有限公司 Quick-hardening cement based self-leveling mortar
CN108298928A (en) * 2018-04-04 2018-07-20 夏璐 A kind of plasticizing quick hardening cement and its preparation method
CN108706937A (en) * 2018-06-15 2018-10-26 武汉理工大学 A kind of sulphoaluminate cement base gravity flowing levelling mortar and preparation method thereof
CN109694228A (en) * 2017-10-23 2019-04-30 北新集团建材股份有限公司 A kind of gypsum based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry
CN109776030A (en) * 2017-11-14 2019-05-21 刘国伟 The solid extraordinary slurry in copolymerization ground
CN109836104A (en) * 2019-04-16 2019-06-04 广州康磊建材有限公司 A kind of high cracking resistance Wear-resisting terrace material and preparation method thereof
CN110451911A (en) * 2019-09-12 2019-11-15 德清扬泰建筑材料有限公司 A kind of flooring keeps the temperature the preparation method of levelling integrated gravity flowing levelling mortar
CN111648554A (en) * 2020-06-30 2020-09-11 北京建筑材料科学研究总院有限公司 Anti-cracking ground filling leveling layer and construction method thereof

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Publication number Priority date Publication date Assignee Title
CN1974469A (en) * 2006-12-07 2007-06-06 计慷 Self-leveling fluorosilicate material
CN101555106A (en) * 2009-04-03 2009-10-14 汕头经济特区龙湖科技有限公司 Composite cementitious material and ground self-leveling mortar using same
CN101786850A (en) * 2010-01-08 2010-07-28 北京天维宝辰化学产品有限公司 Modified cement-based self-leveling mortar and preparation method and application thereof
CN102358693A (en) * 2011-08-22 2012-02-22 天津市贝乐建筑材料有限公司 Levelling mortar and ground construction process based on the same
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1974469A (en) * 2006-12-07 2007-06-06 计慷 Self-leveling fluorosilicate material
CN101555106A (en) * 2009-04-03 2009-10-14 汕头经济特区龙湖科技有限公司 Composite cementitious material and ground self-leveling mortar using same
CN101786850A (en) * 2010-01-08 2010-07-28 北京天维宝辰化学产品有限公司 Modified cement-based self-leveling mortar and preparation method and application thereof
CN102358693A (en) * 2011-08-22 2012-02-22 天津市贝乐建筑材料有限公司 Levelling mortar and ground construction process based on the same
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

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103467046A (en) * 2013-08-28 2013-12-25 句容联众科技开发有限公司 Polymer cement mortar and preparation method thereof
CN104108918A (en) * 2014-06-19 2014-10-22 广东省建筑科学研究院 High performance cement-base self-leveling mortar
CN104108918B (en) * 2014-06-19 2016-08-24 广东省建筑科学研究院集团股份有限公司 A kind of high-performance cement based self-leveling mortar
CN105016678A (en) * 2015-07-08 2015-11-04 水利部交通运输部国家能源局南京水利科学研究院 High-early-strength cement-based filling material for semi-flexible composite pavements
CN105016678B (en) * 2015-07-08 2017-01-18 水利部交通运输部国家能源局南京水利科学研究院 High-early-strength cement-based filling material for semi-flexible composite pavements
CN105060831A (en) * 2015-08-03 2015-11-18 四川好途程科技有限公司 Seamless self-leveling cement millstone and preparation method therefor
CN105464230A (en) * 2015-11-25 2016-04-06 江苏尼高科技有限公司 Floor slab heat insulation and sound isolation system and construction method of floor slab heat insulation and sound isolation system
CN105622029A (en) * 2015-12-25 2016-06-01 江苏蓝圈新材料有限公司 Cement-based self-leveling mortar
CN106587877A (en) * 2016-12-06 2017-04-26 长沙万工机器人科技有限公司 High-hardness cementitious self-leveling mortar
CN107540329A (en) * 2017-09-26 2018-01-05 河南兴安新型建筑材料有限公司 Quick-hardening cement based self-leveling mortar
CN109694228B (en) * 2017-10-23 2020-12-22 北新集团建材股份有限公司 Gypsum-based self-leveling mortar, preparation method thereof and gypsum-based self-leveling slurry
CN109694228A (en) * 2017-10-23 2019-04-30 北新集团建材股份有限公司 A kind of gypsum based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry
CN109776030A (en) * 2017-11-14 2019-05-21 刘国伟 The solid extraordinary slurry in copolymerization ground
CN108298928A (en) * 2018-04-04 2018-07-20 夏璐 A kind of plasticizing quick hardening cement and its preparation method
CN108706937A (en) * 2018-06-15 2018-10-26 武汉理工大学 A kind of sulphoaluminate cement base gravity flowing levelling mortar and preparation method thereof
CN109836104A (en) * 2019-04-16 2019-06-04 广州康磊建材有限公司 A kind of high cracking resistance Wear-resisting terrace material and preparation method thereof
CN110451911A (en) * 2019-09-12 2019-11-15 德清扬泰建筑材料有限公司 A kind of flooring keeps the temperature the preparation method of levelling integrated gravity flowing levelling mortar
CN111648554A (en) * 2020-06-30 2020-09-11 北京建筑材料科学研究总院有限公司 Anti-cracking ground filling leveling layer and construction method thereof

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