CN105236894A - Anti-shrinkage self-leveling mortar with good self-healing property for bedding layer and preparation method thereof - Google Patents

Anti-shrinkage self-leveling mortar with good self-healing property for bedding layer and preparation method thereof Download PDF

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Publication number
CN105236894A
CN105236894A CN201510724054.7A CN201510724054A CN105236894A CN 105236894 A CN105236894 A CN 105236894A CN 201510724054 A CN201510724054 A CN 201510724054A CN 105236894 A CN105236894 A CN 105236894A
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China
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self
healing property
bed course
gravity flowing
flowing levelling
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CN201510724054.7A
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杨锦杰
钟振声
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses an anti-shrinkage self-leveling mortar with good self-healing property for a bedding layer and a preparation method thereof, belonging to the technical field of building materials. The self-leveling mortar comprises the following components by mass: 30 to 46 parts of silicate cement, 20 to 30 parts of mineral slag, 20 to 30 parts of river sand, 0.2 to 1 part of a water reducing agent, 0.05 to 0.1 part of low-viscosity cellulose, 0.5 to 1 part of redispersible latex powder, 0.2 to 1 part of a defoaming agent, 0.2 to 1 part of a retarder and 5 to 10 parts of a skeleton filler. The anti-shrinkage self-leveling mortar provided by the invention has the advantages of good leveling property, good self-healing property, high anti-shrinkage performance, low cost and environmental protection.

Description

A kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar and preparation method thereof
Technical field
The invention belongs to the technical field of material of construction, particularly a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar and preparation method thereof.
Background technology
Along with China's Economic development and aging population serious, building cost of labor improves day by day, bed course gravity flowing levelling mortar is under self gravitation effect, can the levelling architecture indoor ground of big area at short notice, and early strength is fast, speed of application and quality can be improved, lower building cost of labor, lay timber floor, ceramic tile, PVC carpet etc. for big area terrace and larger facility is provided.
Also there are some problems in current bed course gravity flowing levelling mortar:
(1) adopt ultra fine sand as aggregate, seeking to run into extreme difficulties in material for some place, take screen method to obtain fine sand serious waste material, process tails over river sand and brings unnecessary cost of labor; (2) mortar surface unfairness, self-healing property is bad; Construction process amount of water should not control, and easily occurs segregation, bleeding situation; (3) after sclerosis, producing owing to shrinking the crack of bringing easily appears in mortar.
Mainly take ternary gelling system (ordinary Portland cement-αsemiwatergypsum-high-alumina cement (aluminosulfate cement)) to control gravity flowing levelling mortar at present shrink and expand, but αsemiwatergypsum and high-alumina cement not only cost are high, and quality is unstable, not easily long storage time.
Summary of the invention
In order to overcome the shortcoming and defect of prior art, the object of the present invention is to provide a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar.
Another object of the present invention is to the preparation method that above-mentioned self-healing property good resisted shrinkage bed course gravity flowing levelling mortar is provided.
Object of the present invention is achieved through the following technical solutions:
A kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar, the parts by weight of its each component are: silicate cement 30 ~ 46 parts, 20 ~ 30 parts, slag, river sand 20 ~ 30 parts, water reducer 0.2 ~ 1 part, low-viscosity cellulose 0.05 ~ 0.1 part, redispersable latex powder 0.5 ~ 1 part, defoamer 0.2 ~ 1 part, retardant 0.2 ~ 1 part, skeleton filler 5 ~ 10 parts.
Described mortar gelling system is unitary gelling system, is silicate cement.
Described river sand fineness modulus is 1.85.
Described water reducer is powdery polycarboxylic acid water reducer, and surface tension is 71.5 ~ 72.0mn/m.
Described slag water-absorbent is strong, is not more than 0.5% more than 45 tm screen.
Described low-viscosity cellulose is Vltra tears, and its viscosity is 300 ~ 500mPas.
Described redispersable latex powder is vinyl acetate between to for plastic and tertiary carbon ethylene copolymer resin, is water-soluble redispersable latex powder; Preferred redispersable latex powder HP8029, Guangzhou Mo Ke building materials Science and Technology Ltd. provides.
Described defoamer is white powder defoamer; Be preferably dry powder defoamer DF770DD, Guangzhou Mo Ke building materials Science and Technology Ltd. provides.
Described retardant be Sunmorl N 60S pulvis or Trisodium Citrate pulvis more than one.
Described filler be dicalcium powder or dry powder (i.e. calcium-magnesium powder) more than one, preferred dicalcium powder or dry powder are 400 orders.
The preparation method of described self-healing property good resisted shrinkage bed course gravity flowing levelling mortar is by 30 ~ 46 parts by weight silicate cement, 20-30 weight part slag, 20-30 weight part river sand, 0.2-1 weight part water reducer, 0.05-0.1 weight part low-viscosity cellulose, 0.5-1 weight part redispersable latex powder, 0.2-1 weight part defoamer, 0.2-1 weight part retardant, 5-10 weight part skeleton filler is pre-mixed evenly; Before use, note kept dry, during use, add the water (percentage ratio for dry powder and each component weight) of 25%-35%, after low rate mixing 1.5 ~ 2min, leave standstill 1-2min, rapid stirring 2min, obtain gravity flowing levelling mortar, use in 30min after slurry stirs.
Beneficial effect of the present invention is:
(1) the present invention adopts unitary silicate cement gelling system, the easy control mortar presetting period, adding appropriate dump slag not only can Substitute For Partial sand, and this system thermal discharge is low, easily controls to cause volumetric expansion and contraction to cause occurring crack problem due to heat release;
(2) add polycarboxylate water-reducer in mortar as preferred water reducer, greatly reduce water consumption, improve mobility, reinforced mortar pressure-proof and snap-resistent intensity; Avoid using casein food grade levelling element, work the mischief to people are healthy in order to avoid cause the later stage to discharge ammonia;
(3) add low-viscosity hydroxypropylmethylc,llulose in mortar and effectively prevent be full of cracks, the anti-segregation ability of reinforced mortar, and do not affect mortar mobility; Add skeleton filler (dicalcium powder or dry powder) and degree of mobilization and mortar self-healing property can be improved further; And adding of redispersable latex powder improves mortar and draw high caking ability, reduce hollowing rate.
In sum, the invention provides resisted shrinkage gravity flowing levelling mortar levelling property, self-healing property is good, resisted shrinkage performance is high, and cost is low, environmental protection.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment 1
The formula of a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar:
Silicate cement 46 weight part (the stone well P.O42.5R cement of Guangzhou Shi Jing company), slag 24 weight part, river sand 24 weight part, PC-1030 polycarboxylate water-reducer 0.2 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), TPMHPC400 Vltra tears 0.05 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), redispersable latex powder 0.5 weight part (HP8029), defoamer 0.24 weight part (DF770DD), Sunmorl N 60S 0.24 weight part, 400 order dicalcium powder 5 weight parts.
Each component pre-mixing is even, add the water (mass percent for dry powder and each component total amount) of 22.5% during use, after low rate mixing 2min, leave standstill 1.5min, rapid stirring 2min, 30min end operation after slurry stirs.Test mortar mobility and shrinkability with reference in industry standard J/C-T985-2005, test result is as shown in table 1,2; By lancinating, test scarfing healing judges self-healing property, and known by testing, mortar self-healing property prepared by the present embodiment is better.
Embodiment 2
The formula of a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar:
Silicate cement 37 weight part (the stone well P.O42.5R cement of Guangzhou Shi Jing company), slag 28 weight part, river sand 28 weight part, PC-1030 polycarboxylate water-reducer 0.2 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), TPMHPC400 Vltra tears 0.05 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), redispersable latex powder 0.5 weight part (HP8029, Guangzhou Mo Ke building materials Science and Technology Ltd.), defoamer 0.25 weight part (DF770DD, Guangzhou Mo Ke building materials Science and Technology Ltd.), Sunmorl N 60S 0.25 weight part, 400 order dicalcium powder 5 weight parts.
Each component pre-mixing is even, add the water (mass percent for dry powder and each component total amount) of 28.3% during use, after low rate mixing 2min, leave standstill 1.5min, rapid stirring 2min, 30min end operation after slurry stirs.Test mortar mobility and shrinkability with reference in industry standard J/C-T985-2005, test result is as shown in table 1,2; By lancinating, test scarfing healing judges self-healing property, and known by testing, mortar self-healing property prepared by the present embodiment is good.
Embodiment 3
The formula of a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar:
Silicate cement 37 weight part (the stone well P.O42.5R cement that Guangzhou Shi Jing company produces), slag 28 weight part, river sand 28 weight part, PC-1030 polycarboxylate water-reducer 0.2 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), TPMHPC400 Vltra tears 0.05 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), redispersable latex powder 0.5 weight part (HP8029, Guangzhou Mo Ke building materials Science and Technology Ltd.), defoamer 0.25 weight part (DF770DD, Guangzhou Mo Ke building materials Science and Technology Ltd.), Trisodium Citrate 0.25 weight part, 400 order dry powder 5 weight parts.
Each component pre-mixing is even, add the water (mass percent for dry powder and each component total amount) of 25% during use, after low rate mixing 2min, leave standstill 1.5min, rapid stirring 2min, 30min end operation after slurry stirs.Test mortar mobility and shrinkability with reference in industry standard J/C-T985-2005, test result is as shown in table 1,2; By lancinating, test scarfing healing judges self-healing property, and known by testing, mortar self-healing property prepared by the present embodiment is better.
Embodiment 4
The formula of a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar:
Silicate cement 40 weight part (the stone well P.O42.5R cement that Guangzhou Shi Jing company produces), slag 21 weight part, river sand 28 weight part, PC-1030 polycarboxylate water-reducer 0.25 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), TPMHPC400 Vltra tears 0.08 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), HP8029 redispersable latex powder 0.5 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), DF770DD defoamer 0.25 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), Trisodium Citrate 0.25 weight part, 400 order dry powder 10 weight parts.
Each component pre-mixing is even, add the water (mass percent for dry powder and each component total amount) of 30% during use, after low rate mixing 2min, leave standstill 1.5min, rapid stirring 2min, 30min end operation after slurry stirs.Test mortar mobility and shrinkability with reference in industry standard J/C-T985-2005, test result is as shown in table 1,2; By lancinating, test scarfing healing judges self-healing property, and known by testing, mortar self-healing property prepared by the present embodiment is good.
Embodiment 5
The formula of a kind of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar:
Silicate cement 30 weight part (the stone well P.O42.5R cement that Guangzhou Shi Jing company produces), slag 20 weight part, river sand 29 weight part, PC-1030 polycarboxylate water-reducer 0.2 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), TPMHPC400 Vltra tears 0.05 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), HP8029 redispersable latex powder 0.5 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), DF770DD defoamer 0.25 weight part (Mo Ke building materials Science and Technology Ltd. provides by Guangzhou), Trisodium Citrate 0.25 weight part, 400 order dry powder 10 weight parts.
Each component pre-mixing is even, add the water (mass percent for dry powder and each component total amount) of 30% during use, after low rate mixing 2min, leave standstill 1.5min, rapid stirring 2min, 30min end operation after slurry stirs.Test mortar mobility and shrinkability with reference in industry standard J/C-T985-2005, test result is as shown in table 1,2; By lancinating, test scarfing healing judges self-healing property, and known by testing, mortar self-healing property prepared by the present embodiment is better.
Table 1 mobility
Table 2 size changing rate
Embodiment Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5
Size changing rate 0.12% 0.14% 0.13% 0.15% 0.2%
By table 1 and 2 and test of lancinating can show that gravity flowing levelling mortar levelling property in the present invention, self-healing property are good, resisted shrinkage performance is high.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.

Claims (9)

1. a self-healing property good resisted shrinkage bed course gravity flowing levelling mortar, it is characterized in that: the parts by weight of each component are: silicate cement 30 ~ 46 parts, 20 ~ 30 parts, slag, river sand 20 ~ 30 parts, water reducer 0.2 ~ 1 part, low-viscosity cellulose 0.05 ~ 0.1 part, redispersable latex powder 0.5 ~ 1 part, defoamer 0.2 ~ 1 part, retardant 0.2 ~ 1 part, skeleton filler 5 ~ 10 parts.
2. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 1, it is characterized in that: described low-viscosity cellulose is Vltra tears, described water reducer is polycarboxylate water-reducer.
3. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 2, it is characterized in that: the viscosity of described low-viscosity cellulose is 300 ~ 500mPas, the surface tension of described water reducer is 71.5 ~ 72.0mn/m.
4. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 1, is characterized in that: described redispersable latex powder is vinyl acetate between to for plastic and tertiary carbon ethylene copolymer resin; Described defoamer is white powder defoamer.
5. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 4, is characterized in that: described redispersable latex powder is HP8029; Described defoamer is dry powder defoamer DF770DD.
6. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 1, is characterized in that: described retardant be Sunmorl N 60S pulvis or Trisodium Citrate pulvis more than one.
7. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 1, is characterized in that: described river sand fineness modulus is 1.85; 0.5% is not more than more than 45 tm screen of described slag.
8. self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to claim 1, is characterized in that: described skeleton filler be dicalcium powder or dry powder more than one.
9. the preparation method of self-healing property good resisted shrinkage bed course gravity flowing levelling mortar according to any one of claim 1 ~ 8, it is characterized in that: silicate cement, slag, river sand, water reducer, low-viscosity cellulose, redispersable latex powder, defoamer, retardant and skeleton filler component are pre-mixed evenly, the water of 25% ~ 35% of each component weight is added during use, after low rate mixing 1.5 ~ 2min, leave standstill 1 ~ 2min, rapid stirring 2min, obtain gravity flowing levelling mortar, use in 30min after described slurry stirs.
CN201510724054.7A 2015-10-29 2015-10-29 Anti-shrinkage self-leveling mortar with good self-healing property for bedding layer and preparation method thereof Pending CN105236894A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106854067A (en) * 2017-01-16 2017-06-16 河南国隆实业有限公司 Self-leveling dry-mixed mortar and preparation method thereof
CN108383459A (en) * 2018-05-03 2018-08-10 佛山市三水万瑞达环保科技有限公司 A kind of mortar and preparation method thereof that cracking resistance is moisture-proof
CN111484296A (en) * 2020-05-09 2020-08-04 湖南省富民乐建材科技发展有限公司 Self-leveling formula and leveling process thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106854067A (en) * 2017-01-16 2017-06-16 河南国隆实业有限公司 Self-leveling dry-mixed mortar and preparation method thereof
CN106854067B (en) * 2017-01-16 2019-03-08 国隆科技股份有限公司 Self-leveling dry-mixed mortar and preparation method thereof
CN108383459A (en) * 2018-05-03 2018-08-10 佛山市三水万瑞达环保科技有限公司 A kind of mortar and preparation method thereof that cracking resistance is moisture-proof
CN111484296A (en) * 2020-05-09 2020-08-04 湖南省富民乐建材科技发展有限公司 Self-leveling formula and leveling process thereof

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Application publication date: 20160113