CN109912276A - Thick-layer ground self-leveling mortar - Google Patents
Thick-layer ground self-leveling mortar Download PDFInfo
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- CN109912276A CN109912276A CN201910179589.9A CN201910179589A CN109912276A CN 109912276 A CN109912276 A CN 109912276A CN 201910179589 A CN201910179589 A CN 201910179589A CN 109912276 A CN109912276 A CN 109912276A
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- leveling mortar
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Abstract
The present invention provides a kind of thick-layer ground self-leveling mortars, it is characterized by: by cementitious material, flour filler, sand and additive is dry-mixed forms, the cementitious material is ordinary portland cement, the flour filler is dicalcium powder, any one in flyash, the additive is shrinkage type water-reducing agent, water evaporation inhibitor, collaboration expansion compensation contraction composite material, HPMC, defoaming agent and anti-crack fiber；The multiple elements design that wherein the collaboration expansion compensation shrinks that composite material is calcium oxide, extra light calcined magnesia and heavy-burned magnesia composition cooperates with expanding admixture.Thoroughly solve the problems, such as gravity flowing levelling mortar hollowing, cracking, intensity is good.
Description
Technical field
The present invention relates to a kind of thick-layer ground self-leveling mortars, belong to mortar material field.
Background technique
Floor leveling is mainly levelling with artificial scene in now current house ornamentation, and low efficiency, ground flat degree be poor, intensity
Low, with the fast development and people in house ornamentation market to residence comfort continuous improvement, it is manually levelling to can no longer meet
The demand of people.
Gravity flowing levelling mortar can provide a suitable, smooth and firm basis, on given uneven substrate to be laid with
Other various earth materials, at the same require it should be able to large area expeditiously construct.Therefore, gravity flowing levelling mortar must have non-
Often good mobility can achieve the purpose that Self-leveling and from smooth, also to guarantee the water-retaining property for having certain, will not generate separation,
Excreting water phenomenon.
Thick-layer self-leveling cement mortar constructs thickness between 5mm-50mm.It is by ordinary portland cement, aluminate cement, sulphur
The cementitious materials such as aluminate cement or gypsum, fine aggregate, filler and additive composition.There is mobile performance with after water stirring, from
It is levelling to move the levelling or energy that slightly paves.It is high-efficient, intensity is good, flatness is good.
But the existing main problems faced of thick-layer self-leveling cement mortar is: since to belong to thickness opposite for levelling mortar
Smaller, the very big system of surface area will necessarily generate the rapid evaporation of moisture, to generate plastic shrinkage and dry contraction.Together
When, since cementitious material aquation generates self-constriction；Capillary negative pressure increases, and generates chemical shrinkage；Finally, due to the heat of hydration and ring
Border temperature change is easy to produce temperature shrinkage, and contraction problem caused by three big reasons is gravity flowing levelling mortar urgent problem,
The solution of mainstream is by chemically expansible agent, utilizes anhydrite and aluminate cement or sulphate aluminium cement again or all at present
Hydration swelling reaction shunk to make up, but this addresses only and shrinks caused by one factor of chemical shrinkage, thick in actual use
Layer gravity flowing levelling mortar cracking, hollowing are still current urgent problem.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of thick-layer ground self-leveling mortars, thoroughly
Solve the problems, such as gravity flowing levelling mortar hollowing, cracking, intensity is good.
In order to realize above-mentioned purpose of the invention, the present invention provides a kind of thick-layer ground self-leveling mortar, feature exists
In: by cementitious material, flour filler, sand and additive is dry-mixed forms, and the cementitious material is ordinary portland cement, described thin
Filler is dicalcium powder, any one in flyash, and the additive is shrinkage type water-reducing agent, water evaporation inhibitor, collaboration
Expansion compensation shrinks composite material, HPMC, defoaming agent and anti-crack fiber；Wherein the collaboration expansion compensation contraction composite material is
The multiple elements design of calcium oxide, extra light calcined magnesia and heavy-burned magnesia composition cooperates with expanding admixture.
Since hydrated cementitious has induction period, accelerated period and stationary phase, without shrinkage rates and rate of the same period
Difference, the present invention shrink composite material using collaboration expansion compensation, for the first time according to the situation of change of hydrated cementitious contracting different times,
The method for providing whole collaboration expansion compensation, avoids the single method solution shunk in the past just for the compensation of maximum contraction phase
The problem of certainly challenge, pre compensation is excessive frequent occurrence, and the later period, retraction was cracked again.
Wherein water evaporation inhibitor can be reduced 75% or more moisture evaporation, plastic shrinkage 50% or so be reduced, before solution
The problem of easy skinning of thick-layer gravity flow, cracking are shunk when phase is dry.The present invention reduces heat of hydration band only with a kind of cementitious material
The temperature shrinkage come；The compound collaboration expanding admixture formed using different activities expansion component, whole process compensation chemical shrinkage,
Each component synergistic effect, using hydration rate and the collaboration dual coordinated regulation technology of expansion course, thorough solution Self-leveling hollowing,
Problem of Cracking.Intensity is C5-C30, and when pouring 3-8cm thickness not bleeding, do not isolate.Existing ground artificial can directly be replaced
Plaster leveling greatly improves construction efficiency, and flatness can reach two meters of guiding ruler error 2mm, and surface effect is good.
In above scheme: the water evaporation inhibitor is polyethylene glycol.
In above scheme: the shrinkage type water-reducing agent is shrinkage type polycarboxylic acids.
It is preferred that: the shrinkage type polycarboxylic acids is produced using situ-formed graft method.Compare conventional water reducing agents, it have diminishing with
Reduce shrink dual function, it not only can diminishing, simultaneously as situ-formed graft method reduce capillary shrink negative pressure, thus
Reduce contraction.
In above scheme: the collaboration expansion compensation shrinks calcium oxide, extra light calcined magnesia and low activity in composite material
The mass ratio of magnesia is 0.5-3:0.5-3:1-6.
In above scheme: described to state defoaming agent in the compound powder defoaming agent of vegetable oil defoaming agent, organosilicon extremely
Few one kind.
In above scheme: the HPMC is hydroxypropyl methyl cellulose ether.
In above scheme: the anti-crack fiber is polypropylene fibre.
In above scheme: the sand is quartz sand, any one in river sand.
In above scheme: according to parts by weight: according to parts by weight, the cementitious material, flour filler, sand amount are as follows:
250-300 parts of cementitious material, 80-120 parts of flour filler, 530-580 parts of sand；The weight hundred of shrinkage type water-reducing agent in entire mortar
Point content is 0.18%-0.22%, the weight percentage of water evaporation inhibitor is 0.10%-0.50%, collaboration expansion is mended
Repay shrink composite material weight percentage be 3-5%, HPMC weight percentage be 0.05%-0.1%, defoaming agent
Weight percentage is 0.1%-0.2%, the weight percentage of anti-crack fiber is 0.1%-0.2%.
The utility model has the advantages that thick-layer ground levelling mortar strength of the present invention is C5-C30, and not bleeding, no when pouring 3-8cm thickness
It isolates, crack, not hollowing, can directly replace existing ground artificial plaster leveling, greatly improve construction efficiency, and smooth
Degree can reach two meters of guiding ruler error 2mm, and surface effect is good, and ground can be with paving timber floor or using thin layer paving method after construction
Direct paving floor tile etc..The invention with a variety of decrements and expansion technique, successfully solve all the time thick
Self-leveling is easy to crack for layer, hollowing, is unable to get the problem of users approve, at low cost, has obvious economic and technical advantage.
Specific embodiment
Following example is described further the present invention.
Embodiment 1
Thick-layer ground self-leveling mortar, cementitious material ordinary portland cement 300kg, flour filler dicalcium powder 100kg, river sand
554.3kg being formed with additive.
The weight percent of shrinkage type water-reducing agent (the shrinkage type polycarboxylic acids produced using situ-formed graft method) in entire mortar
Content is 0.1897% (1.9kg), the weight percentage of water evaporation inhibitor polyethylene glycol be 0.2295% (2.3kg),
Cooperateing with expansion compensation to shrink the weight percentage of composite material is 3.89% (39kg), HPMC hydroxypropyl methyl cellulose ether
Weight percentage is 0.07% (0.7kg), the weight percentage of vegetable oil defoaming agent is 0.1996% (2kg), cracking resistance is fine
The weight percentage for tieing up 12mm long polypropylene anti-crack fiber is 0.1796% (1.8kg).
It is that calcium oxide, extra light calcined magnesia and heavy-burned magnesia are pressed that wherein the collaboration expansion compensation, which shrinks composite material,
Expanding admixture is cooperateed with according to the multiple elements design of mass ratio 0.5:0.5:1 composition.
The MAG-I type heavy-burned magnesia of heavy-burned magnesia such as Wuhan Sanyuan Special Building Materials Co., Ltd.'s production,
Content of magnesia >=85%.
The performance parameter for the product that the embodiment obtains is fluidity: 103mm, compression strength: 18MPa, flexural strength:
3.2MPa, size changing rate: -0.04%, adhesion strength: 1.8MPa.
Embodiment 2
Thick-layer ground self-leveling mortar, cementitious material ordinary portland cement 250kg, flyash 100kg, quartz sand
557.5kg being formed with additive.
Shrinkage type water-reducing agent (for using the shrinkage type polycarboxylic acids of situ-formed graft method production) is in entire mortar
Weight percentage is 0.18%, the weight percentage of water evaporation inhibitor polyethylene glycol is 0.10%, collaboration expansion is mended
The weight percentage for repaying contraction composite material is 3%, the weight percentage of HPMC hydroxypropyl methyl cellulose ether is
0.05%, the weight percentage of vegetable oil defoaming agent is the weight hundred of 0.1%, anti-crack fiber 12mm long polypropylene anti-crack fiber
Dividing content is 0.1%.
It is that calcium oxide, extra light calcined magnesia and heavy-burned magnesia are pressed that wherein the collaboration expansion compensation, which shrinks composite material,
Expanding admixture is cooperateed with according to the multiple elements design of mass ratio 3:3:5 composition.
The performance parameter for the product that the embodiment obtains is fluidity: 115mm, compression strength: 15MPa, flexural strength:
2.7MPa, size changing rate :+0.024%, adhesion strength: 1.8MPa.
Embodiment 3
Thick-layer ground self-leveling mortar, cementitious material ordinary portland cement 280kg, flyash 80kg, river sand 580kg and
Additive composition.
Shrinkage type water-reducing agent (for using the shrinkage type polycarboxylic acids of situ-formed graft method production) is in entire mortar
Weight percentage is 0.22%, the weight percentage of water evaporation inhibitor polyethylene glycol is 0.50%, collaboration expansion is mended
The weight percentage for repaying contraction composite material is 5%, the weight percentage of HPMC hydroxypropyl methyl cellulose ether is
0.1%, the weight percentage of organic silicon defoamer is the weight hundred of 0.2%, anti-crack fiber 12mm long polypropylene anti-crack fiber
Dividing content is 0.2%.
It is that calcium oxide, extra light calcined magnesia and heavy-burned magnesia are pressed that wherein the collaboration expansion compensation, which shrinks composite material,
Expanding admixture is cooperateed with according to the multiple elements design of mass ratio 1:1:3 composition.
The performance parameter for the product that the embodiment obtains is fluidity: 109mm, compression strength: 17MPa, flexural strength:
2.9MPa, size changing rate :+0.02%, adhesion strength: 1.8MPa.
Embodiment 4
Thick-layer ground self-leveling mortar, cementitious material ordinary portland cement 260kg, flyash 120kg, river sand 520kg
It is formed with additive.
Shrinkage type water-reducing agent (for using the shrinkage type polycarboxylic acids of situ-formed graft method production) is in entire mortar
Weight percentage is 0.2%, the weight percentage of water evaporation inhibitor polyethylene glycol is 0.25%, collaboration expansion compensation
The weight percentage for shrinking composite material is 4.2%, the weight percentage of HPMC hydroxypropyl methyl cellulose ether is
0.08%, the weight percentage of organic silicon defoamer is the weight of 0.12%, anti-crack fiber 12mm long polypropylene anti-crack fiber
Percentage composition is 0.15%.
It is that calcium oxide, extra light calcined magnesia and heavy-burned magnesia are pressed that wherein the collaboration expansion compensation, which shrinks composite material,
Expanding admixture is cooperateed with according to the multiple elements design of mass ratio 2:2:6 composition.
The performance parameter for the product that the embodiment obtains is fluidity: 120mm, compression strength: 16MPa, flexural strength:
2.3.1MPa, size changing rate: -0.03%, adhesion strength: 1.8MPa.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of thick-layer ground self-leveling mortar, it is characterised in that: by cementitious material, flour filler, sand and additive it is dry-mixed and
It is ordinary portland cement at, the cementitious material, the flour filler is dicalcium powder, any one in flyash, described outer
Adding agent is shrinkage type water-reducing agent, water evaporation inhibitor, collaboration expansion compensation contraction composite material, HPMC, defoaming agent and cracking resistance
Fiber；It is calcium oxide, extra light calcined magnesia and heavy-burned magnesia composition that wherein the collaboration expansion compensation, which shrinks composite material,
Multiple elements design cooperate with expanding admixture.
2. thick-layer ground self-leveling mortar according to claim 1, it is characterised in that: the water evaporation inhibitor is poly- second
Glycol.
3. thick-layer ground self-leveling mortar according to claim 2, it is characterised in that: the shrinkage type water-reducing agent is shrinkage type
Polycarboxylic acids.
4. thick-layer ground self-leveling mortar according to claim 3, it is characterised in that: the shrinkage type polycarboxylic acids is using in situ
Grafting method production.
5. thick-layer ground self-leveling mortar according to claim 3, it is characterised in that: the collaboration expansion compensation shrinks compound
The mass ratio of calcium oxide, extra light calcined magnesia and heavy-burned magnesia is 0.5-3:0.5-3:1-6 in material.
6. thick-layer ground self-leveling mortar according to claim 5, it is characterised in that: the defoaming agent of stating disappears selected from vegetable oil
Compound at least one of the powder defoaming agent of infusion, organosilicon.
7. thick-layer ground self-leveling mortar according to claim 6, it is characterised in that: the HPMC is hydroxypropyl methyl fiber
Plain ether.
8. thick-layer ground self-leveling mortar according to claim 7, it is characterised in that: the anti-crack fiber is that polypropylene is fine
Dimension.
9. any one of -8 thick-layer ground self-leveling mortar according to claim 1, it is characterised in that: the sand is quartz
Any one in sand, river sand.
10. thick-layer ground self-leveling mortar according to claim 9, it is characterised in that: according to parts by weight, the gelling material
Material, flour filler, sand amount are as follows: 250-300 parts of cementitious material, 80-120 parts of flour filler, 530-580 parts of sand；Entire mortar
The weight percentage of middle shrinkage type water-reducing agent is 0.18%-0.22%, the weight percentage of water evaporation inhibitor is
0.10%-0.50%, collaboration expansion compensation shrink the weight percentage of composite material and contain for the weight percent of 3-5%, HPMC
Amount is 0.05%-0.1%, the weight percentage of defoaming agent is 0.1%-0.2%, the weight percentage of anti-crack fiber is
0.1%-0.2%.
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| CN201910179589.9A CN109912276A (en) | 2019-03-11 | 2019-03-11 | Thick-layer ground self-leveling mortar |
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| CN201910179589.9A CN109912276A (en) | 2019-03-11 | 2019-03-11 | Thick-layer ground self-leveling mortar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407541A (en) * | 2019-08-15 | 2019-11-05 | 郑州大学 | One kind is for water conservancy project large volume anti-crack concrete and preparation method thereof |
Citations (1)
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|---|---|---|---|---|
| CN106747138A (en) * | 2016-12-07 | 2017-05-31 | 华砂砂浆有限责任公司 | A kind of quick leveling mortar in ground |
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2019
- 2019-03-11 CN CN201910179589.9A patent/CN109912276A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106747138A (en) * | 2016-12-07 | 2017-05-31 | 华砂砂浆有限责任公司 | A kind of quick leveling mortar in ground |
Non-Patent Citations (4)
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| 中国建筑学会混凝土外加剂应用技术专业委员会: "《混凝土外加剂及其应用技术新进展》", 30 June 2009, 北京理工大学出版社 * |
| 刘加平等: "氧化镁复合膨胀剂对高性能混凝土变形特性的影响", 《东南大学学报（自然科学版）》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110407541A (en) * | 2019-08-15 | 2019-11-05 | 郑州大学 | One kind is for water conservancy project large volume anti-crack concrete and preparation method thereof |
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