CN108863274B - Surface layer self-leveling mortar with conductive function - Google Patents

Surface layer self-leveling mortar with conductive function Download PDF

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Publication number
CN108863274B
CN108863274B CN201810948669.1A CN201810948669A CN108863274B CN 108863274 B CN108863274 B CN 108863274B CN 201810948669 A CN201810948669 A CN 201810948669A CN 108863274 B CN108863274 B CN 108863274B
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agent
leveling mortar
self
conductive
good
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CN108863274A (en
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李英丁
郑先凤
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Chongqing Lyuheng Environmental Protection Technology Co ltd
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Chongqing Lyuheng Environmental Protection Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/141Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing dihydrated gypsum before the final hardening step, e.g. forming a dihydrated gypsum product followed by a de- and rehydration step
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/60Flooring materials
    • C04B2111/62Self-levelling compositions
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/90Electrical properties
    • C04B2111/905Anti-static materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/90Electrical properties
    • C04B2111/94Electrically conducting materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The surface layer self-leveling mortar with the conductive function comprises 15-20% of Portland cement, 20-25% of aluminate cement and CaSO4·2H210-12.5% of O, 16.12-41.37% of quartz sand, 0.5-1.5% of carbon nano tube, 4-6% of conductive graphite, 3-5% of steel ball, 1.5-3% of copper fiber, 3.5-6.0% of redispersible latex powder, 0.2-0.25% of water reducing agent, 0.05-0.1% of early strength agent, 0.15-0.25% of retarder, 0.03-0.08% of anti-settling agent, 0.1-0.2% of defoaming agent, 0.4-0.6% of dispersing agent, 0-3% of pigment and 0.2-0.4% of magnesium aluminum silicate. The surface layer self-leveling mortar has small surface resistance which is less than 106 omega/sq, excellent conductivity, shrinkage rate of less than-0.04 percent, difficult cracking due to shrinkage of the surface layer self-leveling mortar, good volume stability, no cracking, no hollowing, good surface glossiness, high flatness, uniform color, low resistance, good conductivity, high strength, good wear resistance, good waterproof performance, simple and feasible preparation method and suitability for industrial production.

Description

Surface layer self-leveling mortar with conductive function
Technical Field
The invention belongs to the field of industrial design of building materials, and particularly relates to surface layer self-leveling mortar with a conductive function.
Background
The current rapid development in the fields of mobile internet of things, big data, cloud technology and the like drives the development of telecom and electronic related industries, and the relevant requirements of static prevention on the ground of various data machine rooms are improved.
At present, most machine rooms adopt anti-static epoxy terraces and the like as ground decoration materials, the application of the oily epoxy terraces is increasingly limited under the requirements of environmental protection related policies, and a wide space is provided for the development of cement-based anti-static and conductive terraces.
At present, surface layer self-leveling mortar with a conductive function is on the market, but still has the technical problems of poor color uniformity, low strength, poor wear resistance, poor waterproof performance, poor stability, high resistivity, unsatisfactory conductive performance, shrinkage cracking, more hollowing and the like of the surface layer self-leveling mortar.
Disclosure of Invention
The invention aims to provide surface self-leveling mortar with a conductive function.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a surface course self-leveling mortar with electrically conductive function which characterized in that: it is composed of (by weight) Portland cement 15-20%, aluminate cement 20-25%, CaSO4·2H210-12.5% of O, 16.12-41.37% of quartz sand, 0.5-1.5% of carbon nano tube, 4-6% of conductive graphite, 3-5% of steel ball, 1.5-3% of copper fiber, 3.5-6.0% of redispersible latex powder, 0.2-0.25% of water reducing agent, 0.05-0.1% of early strength admixture, 0.15-0.25% of retarder, 0.03-0.08% of anti-settling agent, 0.1-0.2% of defoaming agent, 0.4-0.6% of dispersing agent, 0-3% of pigment and 0.2-0.4% of magnesium aluminum silicate, and the materials are uniformly stirred and mixed in a horizontal non-gravity stirrer at a stirring speed of 50-100 r/min for 15-20 min, then water is added on site to ensure that the percentage content of the materials is 20-24%, and the materials are uniformly stirred and construction can be carried out on the ground.
Further, surface course self-leveling mortar with conductive function is characterized in that: the portland cement is white portland cement with the strength grade of more than 42.5, and the aluminate cement is aluminate cement with the content of aluminum oxide of more than 50 percent by weight.
Further, surface course self-leveling mortar with conductive function is characterized in that: the carbon nano tube is a single-wall carbon nano tube with the length-diameter ratio of more than 50, and the fineness of the conductive graphite is required to be less than 200 meshes.
Further, surface course self-leveling mortar with conductive function is characterized in that: the diameter of the steel ball is 0.2-0.5 mm, and the length of the copper fiber is 3-5 mm.
Further, surface course self-leveling mortar with conductive function is characterized in that: the redispersible emulsion powder is vinyl acetate/ethylene copolymer, the early strength agent is one or more of calcium formate, calcium chloride, lithium carbonate, sodium carbonate, lithium sulfate, calcium hydroxide and lithium hydroxide, and the fineness is less than 200 meshes.
Further, surface course self-leveling mortar with conductive function is characterized in that: the water reducing agent is one or more of naphthalene sulfonate, lignosulfonate, sulfonated melamine formaldehyde resin and powder polycarboxylic acid, and the retarder is one or more of tartaric acid, citric acid, sodium citrate, sodium gluconate and dextrotartaric acid.
Further, surface course self-leveling mortar with conductive function is characterized in that: the anti-settling agent is one or more of methyl hydroxypropyl cellulose ether, methyl hydroxyethyl cellulose ether, polyvinyl alcohol powder, polyacrylamide and starch ether; the defoaming agent is one or more of mineral oil, emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polydimethylsiloxane.
Further, surface course self-leveling mortar with conductive function is characterized in that: the dispersing agent is a composite dispersing agent consisting of polyethylene glycol 400 and modified fatty acid glyceride, wherein the mass ratio of the polyethylene glycol 400 to the modified fatty acid glyceride is 1: 2-3, wherein the fineness of the magnesium aluminum silicate is less than 200 meshes. The modified fatty acid glyceride can be purchased from modified fatty acid glyceride P841 in Germany Mingling chemical.
Further, surface course self-leveling mortar with conductive function is characterized in that: the early strength agent is preferably lithium hydroxide, the water reducing agent is preferably powder polycarboxylic acid, the retarder is preferably dextro-tartaric acid, the anti-settling agent is preferably starch ether, and the defoaming agent is preferably emulsified silicone oil.
The raw materials used above are all known to those skilled in the art and all are commercially available.
The invention has the following beneficial effects:
the surface layer self-leveling mortar with the conductive function has the advantages of small surface resistance which is less than 106 omega/sq, excellent conductive performance, shrinkage rate which is less than-0.04 percent, difficult cracking due to shrinkage of the surface layer self-leveling mortar, good volume stability, no cracking, no hollowing, good surface gloss, high flatness, uniform color, low resistance, good conductive performance, high strength, good wear resistance, good waterproof performance, simple and feasible preparation method and suitability for industrial production.
Detailed Description
The present invention is described in detail below by way of examples, it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make some insubstantial modifications and adaptations of the present invention based on the above-described disclosure.
Example 1: the components and the total amount ratio in the embodiment are as follows:
and weighing corresponding substances according to the mass percentage content relationship in the table, placing the corresponding substances in a stirring tank, and stirring for 15min to obtain a finished product.
Example 2: the components and the total amount ratio in the embodiment are as follows:
and weighing corresponding substances according to the mass percentage content relationship in the table, placing the corresponding substances in a stirring tank, and stirring for 15min to obtain a finished product.
Example 3: construction of self-leveling of the conductive surface layer:
1. cleaning the ground and brushing the special interface agent.
2. Adding 24 percent of water of the total weight of the self-leveling agent prepared in the example 1 and the example 2 into the self-leveling agent, uniformly stirring, pouring the mixture on the ground, and using a scraper to assist in leveling. Meanwhile, common self-leveling is used as a comparison experiment.
3. The properties tested are shown in the following table:
test items Common self-leveling Example 1 Example 2
Initial fluidity mm 141 140 141
Fluidity mm at 20min 138 137 138
24h flexural strength MPa 4.56 5.21 5.32
Compressive strength MPa of 24h 12.5 18.7 19.5
28e flexural strength MPa 6.78 7.23 7.84
28d compressive strength MPa 31.5 35.8 41.4
Shrinkage ratio% -0.10% -0.03% -0.04%
Abrasion (g) 0.51 0.16 0.12
Surface resistance omega/sq 1011 106 105
The data show that the conductive surface layer self-leveling mortar has the characteristics of small shrinkage, high strength and strong wear resistance. Compared with the common surface layer self-leveling mortar, the surface resistance is obviously reduced, and the requirements of static resistance and electric conduction are met.

Claims (6)

1. The utility model provides a surface course self-leveling mortar with electrically conductive function which characterized in that: the conductive carbon nano tube material comprises, by weight, 15-20% of Portland cement, 20-25% of aluminate cement, 10-12.5% of CaSO4.2H2O, 16.12-41.37% of quartz sand, 0.5-1.5% of carbon nano tubes, 4-6% of conductive graphite, 3-5% of steel balls, 1.5-3% of copper fibers, 3.5-6.0% of redispersible latex powder, 0.2-0.25% of water reducing agent, 0.05-0.1% of early strength admixture, 0.15-0.25% of retarder, 0.03-0.08% of anti-settling agent, 0.1-0.2% of defoaming agent, 0.4-0.6% of dispersing agent, 0-3% of pigment, 0.2-0.4% of magnesium aluminum silicate, wherein the carbon nano tubes are carbon nano tubes with the length-diameter ratio of more than 50, the conductive fine graphite is less than 200 meshes, and the diameter of the steel balls is 0.2-0.5 mm, the copper fiber length is 3-5 mm, the dispersing agent is a composite dispersing agent composed of polyethylene glycol 400 and modified fatty acid glyceride, wherein the mass ratio of the polyethylene glycol 400 to the modified fatty acid glyceride is 1: 2-3, wherein the fineness of the aluminum magnesium silicate is less than 200 meshes; the anti-settling agent is one or more of methyl hydroxypropyl cellulose ether, methyl hydroxyethyl cellulose ether, polyvinyl alcohol powder, polyacrylamide and starch ether; the materials are uniformly stirred and mixed, the stirring speed is set to be 50-100 r/min, the stirring time is 15-20 min, then water is added to the materials on the site so that the moisture percentage of the materials is 20-24%, and the materials are uniformly stirred and can be constructed on the ground.
2. The surface self-leveling mortar with the electric conduction function as claimed in claim 1, wherein: the portland cement is white portland cement with the strength grade of more than 42.5, and the aluminate cement is aluminate cement with the content of aluminum oxide of more than 50 percent by weight.
3. The surface self-leveling mortar with the electric conduction function as claimed in claim 2, wherein: the redispersible emulsion powder is vinyl acetate/ethylene copolymer, the early strength agent is one or more of calcium formate, calcium chloride, lithium carbonate, sodium carbonate, lithium sulfate, calcium hydroxide and lithium hydroxide, and the fineness is less than 200 meshes.
4. The surface self-leveling mortar with the electric conduction function as claimed in claim 3, wherein: the water reducing agent is one or more of naphthalene sulfonate, lignosulfonate, sulfonated melamine formaldehyde resin and powder polycarboxylic acid, and the retarder is one or more of citric acid, sodium citrate, sodium gluconate and dextro-tartaric acid.
5. The surface self-leveling mortar with the electric conduction function as claimed in claim 4, wherein: the defoaming agent is one or more of mineral oil, emulsified silicone oil, polyoxyethylene polyoxypropylene pentaerythritol ether and polydimethylsiloxane.
6. The surface self-leveling mortar with the electric conduction function as claimed in claim 5, wherein: the early strength agent is lithium hydroxide, the water reducing agent is powder polycarboxylic acid, the retarder is dextro-tartaric acid, the anti-settling agent is starch ether, and the defoaming agent is emulsified silicone oil.
CN201810948669.1A 2018-08-20 2018-08-20 Surface layer self-leveling mortar with conductive function Active CN108863274B (en)

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CN108863274B true CN108863274B (en) 2021-03-30

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050095A (en) * 2007-05-11 2007-10-10 计慷 Flow by gravity evened material of fluorin silicon for guarding against electrostatic
CN101239800A (en) * 2008-03-07 2008-08-13 哈尔滨工业大学 Carbon nano-tube enhanced cement-base composite material and preparation method thereof
CN102424563A (en) * 2011-09-13 2012-04-25 同济大学 Desulfurized gypsum based antistatic self-leveling mortar and its preparation method
CN103553418A (en) * 2013-09-27 2014-02-05 江苏兆佳建材科技有限公司 Ready-mixed mortar water-retention thixotropic agent 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
CN104513046A (en) * 2013-09-29 2015-04-15 北京敬业达新型建筑材料有限公司 Preparation method for antistatic cement-based self-levelling surface-layer mortar
CN107663057A (en) * 2017-09-13 2018-02-06 南京工业大学 A kind of high intensity gravity flowing levelling mortar floor material and preparation method for surface layer
CN107698219A (en) * 2017-08-22 2018-02-16 苏州赛璐泰科化工有限公司 A kind of thick-layer gravity flowing levelling mortar
CN107963867A (en) * 2017-12-27 2018-04-27 北京宝辰联合科技股份有限公司 A kind of gravity flowing levelling mortar

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050095A (en) * 2007-05-11 2007-10-10 计慷 Flow by gravity evened material of fluorin silicon for guarding against electrostatic
CN101239800A (en) * 2008-03-07 2008-08-13 哈尔滨工业大学 Carbon nano-tube enhanced cement-base composite material and preparation method thereof
CN102424563A (en) * 2011-09-13 2012-04-25 同济大学 Desulfurized gypsum based antistatic self-leveling mortar and its preparation method
CN103553418A (en) * 2013-09-27 2014-02-05 江苏兆佳建材科技有限公司 Ready-mixed mortar water-retention thixotropic agent and preparation method thereof
CN104513046A (en) * 2013-09-29 2015-04-15 北京敬业达新型建筑材料有限公司 Preparation method for antistatic cement-based self-levelling surface-layer mortar
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
CN107698219A (en) * 2017-08-22 2018-02-16 苏州赛璐泰科化工有限公司 A kind of thick-layer gravity flowing levelling mortar
CN107663057A (en) * 2017-09-13 2018-02-06 南京工业大学 A kind of high intensity gravity flowing levelling mortar floor material and preparation method for surface layer
CN107963867A (en) * 2017-12-27 2018-04-27 北京宝辰联合科技股份有限公司 A kind of gravity flowing levelling mortar

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