KR101447182B1 - Mortar with high selp leveling using expanded polyurethane - Google Patents
Mortar with high selp leveling using expanded polyurethane Download PDFInfo
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- KR101447182B1 KR101447182B1 KR1020140027831A KR20140027831A KR101447182B1 KR 101447182 B1 KR101447182 B1 KR 101447182B1 KR 1020140027831 A KR1020140027831 A KR 1020140027831A KR 20140027831 A KR20140027831 A KR 20140027831A KR 101447182 B1 KR101447182 B1 KR 101447182B1
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- foamed polyurethane
- leveling
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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 hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a fine mortar excellent in self-leveling using foamed polyurethane.
The fine mortar excellent in self-leveling using the foamed polyurethane of the present invention is excellent in self leveling using the foamed polyurethane of the present invention. A foamed polyurethane powder having an embedding ratio of 2.1 to 2.5 in an amount of 3 to 7 parts by weight based on 100 parts by weight of the cement; 0.1 to 0.3 parts by weight of a water reducing agent based on 100 parts by weight of the cement; 0.1 to 0.3 parts by weight of a thickener relative to 100 parts by weight of the cement; 0.1 to 0.3 parts by weight of a surfactant relative to 100 parts by weight of the cement; And 50 to 70 parts by weight of water based on 100 parts by weight of the cement.
The present invention excludes the use of fine aggregates, which are essentially used for plaster mortar, and, even though the use of fluidizing agents that generally provide self-leveling performance is excluded, the use of foamed polyurethane powder that imparts sound absorption, By specifying the degree of granulation and specifying the ratio of the water reducing agent, the thickening agent and the surfactant, a finished mortar excellent in compression strength and heat insulating performance and excellent in self-leveling performance is provided.
In addition, by adding a small amount of citrus peel powder, it is possible to reduce harmful odor peculiar to concrete generated after pouring and curing, and to make the concrete color of gray light appear brighter, thereby improving the aesthetics.
Description
TECHNICAL FIELD The present invention relates to a fine mortar, and more particularly to a fine mortar having excellent self-leveling property using foamed polyurethane, and having compressive strength and fireproof heat insulation performance.
Floor structures in residential buildings, especially multi - family buildings and apartment buildings, where Koreans are inhabited, should solve the problem of cooling, heating and sound insulation in addition to the floor compartment.
Especially, recently, since the problem of interlayer noise is very important, it is necessary to increase the thickness of the slab concrete to more than 210mm, to install the sound insulating material and insulation material, and then to pipe the heating pipe and to finish the floor board after the flat finishing by the finishing mortar It is common to construct.
However, many developments have been made in the construction of the above-mentioned method, so that the interlayer noise such as the heavy impact sound and the light impact sound have been reduced much more than before. However, in order to cope with the high consciousness of the residents and to construct even a little economically A more effective and economical mortar is required.
In the related art, "urethane foam concrete used in urethane foam concrete and urethane foam concrete used therein" (Korean Patent Registration No. 10-0391558, Patent Document 1) includes waste urethane foam, waste styrofoam, admixture, cement and sand And a technique of mixing at an appropriate ratio is disclosed.
In Patent Document 1, the urethane pole is set to 75% of the total mortar volume, and the amount of sand used is minimized to 2%.
The above Patent Document 1 has a small specific gravity as compared with general cement concrete, achieves weight reduction, increases the thermal conductivity, and has a high sound absorption rate.
In addition, the compressive strength is also less than 1 MPa.
As another technique, "mortar for concrete mainly composed of foamed urethane pole and waste synthetic resin and method for producing the same" (Korean Patent Registration No. 10-0784978, Patent Document 2) discloses a mortar having a composition similar to that of Patent Document 1, Technology that excludes use has been made public.
In Patent Document 2, although the compression strength is improved as compared with the Patent Document 1, there is a problem that the sound absorption rate is lowered even though the compression strength is small, even though it is about 1 MPa.
In addition, although the above-described Patent Documents 1 and 2 commonly have excellent characteristics, the self-leveling performance is not excellent, and there is a problem that an effort must be made to align the leveling in the construction process.
In particular, as for the concrete mortar, it is very important to maintain the self-leveling performance unlike concrete for other structural walls. As in the above-mentioned patent documents, the higher the ratio of the urethane pole, the higher the lightness, the heat insulation and the sound absorption performance, And the self-leveling performance, which is a main performance to be provided by the mortar, is lowered. Thus, the mortar of the prior art as described above is not suitable for use as a plaster mortar.
In addition, fine mortar should basically contain fine aggregate, but due to the low specific gravity of the urethane pole, separation of the fine aggregate, cement, and the like is easily caused, thereby deteriorating the self-leveling performance.
Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a self-leveling material which is free from the use of fine aggregates, And the degree of assembly of the foamed polyurethane powder which imparts heat insulation and light weight functionality, and specifying the ratio of the water reducing agent, the thickener and the surfactant, thereby providing a plaster mortar excellent in compression strength and heat insulation performance and excellent in self leveling performance will be.
In addition, by adding a small amount of citrus peel powder, it is possible to reduce the harmful odor peculiar to concrete generated after pouring and curing, and to make the gray concrete color look lighter, thereby improving the aesthetics.
In order to solve the above problems, the present invention provides a fine mortar excellent in self-leveling using the foamed polyurethane of the present invention, comprising 100 parts by weight of cement; A foamed polyurethane powder having an embedding ratio of 2.1 to 2.5 in an amount of 3 to 7 parts by weight based on 100 parts by weight of the cement; 0.1 to 0.3 parts by weight of a water reducing agent based on 100 parts by weight of the cement; 0.1 to 0.3 parts by weight of a thickener relative to 100 parts by weight of the cement; 0.1 to 0.3 parts by weight of a surfactant relative to 100 parts by weight of the cement; And 50 to 70 parts by weight of water based on 100 parts by weight of the cement.
The waterproofing agent, the thickener and the surfactant are respectively 0.20-0.22 parts by weight based on 100 parts by weight of cement, and the water is 55 parts by weight relative to 100 parts by weight of cement. To 65 parts by weight.
Also, it is characterized in that the citrus peel powder is further contained in an amount of 0.03 to 0.04 part by weight with respect to 100 parts by weight of the cement.
The present invention excludes the use of fine aggregates, which are essentially used for plaster mortar, and, even though the use of a fluidizing agent which generally provides self-leveling performance is excluded, the foamed polyurethane powder which imparts sound absorption and heat insulation, By specifying the degree of granulation and specifying the ratio of the water reducing agent, the thickening agent and the surfactant, a finished mortar excellent in compression strength and heat insulating performance and excellent in self-leveling performance is provided.
In addition, by adding a small amount of citrus peel powder, it is possible to reduce harmful odor peculiar to concrete generated after pouring and curing, and to make the concrete color of gray light appear brighter, thereby improving the aesthetics.
Hereinafter, the fine mortar excellent in self-leveling using the foamed polyurethane of the present invention will be described in detail.
The self-leveling finished fine mortar using the foamed polyurethane of the present invention largely comprises cement, expanded polyurethane powder, water reducing agent, thickener, surfactant and water.
In the present invention, common Portland cement is used as the cement, and its composition is composed of 100 parts by weight.
It is more preferable that the density is in the range of 3.10 to 3.20 g / cm 3, the blast powder is in the range of 3,385 to 3,390 cm 2 / g, and the autoclave expansion degree is 0.05%.
In the present invention, the foamed polyurethane powder improves the lightweight performance, the heat insulation performance and the sound absorption performance, and is configured to have an assembly ratio of 2.1 to 2.5 in the range of 3 to 7 parts by weight based on 100 parts by weight of the cement.
At this time, the foamed polyurethane powder is more preferably composed of 5.0 to 5.4 parts by weight based on 100 parts by weight of cement.
The weight of the foamed polyurethane powder is relatively large as compared with the known technology, and it is obvious that the weight of the foamed polyurethane powder is increased by the light weight performance, the heat insulation and the heat absorbing performance.
The foamed polyurethane powder improves the lightweight performance, the heat insulation performance and the sound absorption performance, as described in Patent Documents 1 and 2.
It is obvious that such a foamed polyurethane powder must have a higher composition ratio in order to improve the performance.
However, in the case of plaster mortar, it is important to secure the self-leveling performance, and basically it should exhibit a compressive strength higher than a certain level.
In the present invention, the amount of foamed polyurethane powder is maximized and its granulation rate is limited, thereby providing excellent compression strength and high self-leveling performance in addition to the sound absorption and heat insulation performance provided by the foamed polyurethane powder.
In addition to the particle size control, the self-leveling performance can be improved by specifying the ratio of the water reducing agent, the thickener, and the surfactant without using the fluidizing agent commonly used in the plaster mortar.
The foamed polyurethane preferably has a density of 0.13 to 0.15 g / cm3.
The foamed polyurethane powder preferably has a granulatability in the range of 2.1 to 2.5, and is further limited to a particle size much smaller than that of the fine aggregate applied to the plaster mortar so that the diameter of the particles is kept at 2 mm or less.
By reducing the size of the foamed polyurethane powder, the self-leveling performance becomes relatively higher because the size of the foamed polyurethane powder is smaller than the general polyurethane size.
Further, since the fine aggregate is completely excluded, the layer separation phenomenon between the foamed polyurethane powder having a small specific gravity and the fine aggregate is less likely to occur.
In the present invention, the water reducing agent is composed of 0.1 to 0.3 parts by weight based on 100 parts by weight of the cement.
More preferably from 0.15 to 0.20 parts by weight.
At this time, various known water reducing agents may be used as the water reducing agent, but it is preferable to use an AE water reducing agent.
The AE water reducer improves self-leveling performance when used with foamed polyurethane powder compared to other types of water reducing agents.
The AE water reducing agent is known to be advantageous for securing fluidity, but if used excessively, it induces the delay of the coagulation and the dispersion of the cement particles, thereby causing a problem of lowering the strength.
In the present invention, when the foamed polyurethane foam is limited to the above ratio and the granulation ratio, the addition of the AE water reducing agent to the above weight, more preferably 0.20 to 0.22, relative to 100 parts by weight of the cement, Strength improvement and slump flow are similar to those of fine aggregate.
In the present invention, the thickener is composed of 0.1 to 0.3 parts by weight based on 100 parts by weight of the cement.
More preferably 0.20 to 0.22 part by weight.
The thickening agent may be composed of known thickening agents, and may be composed of any one of methyl cellulose, ethyl cellulose and cellulose ether, which is also characterized in that the use of the thickening agent is increased compared to other well-known compositions.
This structure further promotes the bonding between the foamed polyurethane powder and the cement, thereby suppressing the dispersion of the cement particles and preventing the strength from lowering even though the amount of the water reducing agent is increased.
In the present invention, the surfactant is composed of 0.1 to 0.3 parts by weight based on 100 parts by weight of the cement.
More preferably 0.20 to 0.22 part by weight.
As the surfactant, a known surfactant may be used.
In the present invention, water is 50 to 70 parts by weight, preferably 55 to 65 parts by weight, based on 100 parts by weight of the cement.
In the above-described structure, 0.03 to 0.04 part by weight of the citrus peel powder may be further added to 100 parts by weight of the cement.
Citrus peel is usually used for edible purposes and has effects such as antioxidant and environmental hormone suppression, and the technology used as pulp is also disclosed.
In the present invention, the citrus peel is used to reduce the harmful odor peculiar to concrete occurring after pouring and curing, and to enhance the aesthetics by making the gray concrete color look brighter.
Particularly, when it is used below the above-mentioned ratio, the odor reduction effect and the color change are insufficient, and when used above the above ratio, the compression strength is lowered and the self-leveling performance is lowered.
Hereinafter, embodiments of the fine mortar excellent in self-leveling using the foamed polyurethane of the present invention will be described.
[Example 1]
480 kg of portland cement having a density of 3.15 g / cm 3, a blast powder of 3,390 cm 2 and an autoclave expansion degree of 0.05%, 25 kg of foamed polyurethane powder having an assembly ratio of 2.2, 1 kg of AE water reducing agent, 1 kg of methylcellulose as a thickener, 1 kg of nonionic surfactant and 288 kg of water were stirred for 30 seconds at 20 rpm for 30 seconds, 30 rpm for 60 seconds, and 40 rpm for 90 seconds using a forced fan type mixer to prepare a hard mortar.
[Example 2]
The procedure of Example 1 was followed except that 1.5 kg of citrus peel powder was added to prepare the plaster mortar of Example 2.
[Comparative Example 1]
The procedure of Example 1 was followed except that 25 kg of sand was used instead of the foamed polyurethane powder to prepare the mortar of Comparative Example 1.
[Comparative Example 2]
The mortar of Comparative Example 2 was prepared by proceeding in the same manner as in Example 1 except that 0.5 kg of the AE water reducing agent was added.
[Comparative Example 3]
The mortar of Comparative Example 3 was prepared by proceeding in the same manner as in Example 1 except that 1.5 kg of the AE water reducing agent was added.
[Comparative Example 4]
The mortar of Comparative Example 4 was prepared by proceeding in the same manner as in Example 1 except that 0.5 kg of a thickener was added.
[Comparative Example 5]
The mortar of Comparative Example 5 was prepared by proceeding in the same manner as in Example 1 except that 1.5 kg of the thickener was added.
[Comparative Example 6]
The mortar of Comparative Example 6 was prepared in the same manner as in Example 1 except that the granulation ratio of the foamed polyurethane powder was set to 3.0.
[Comparative Example 7]
The mortar of Comparative Example 7 was prepared in the same manner as in Example 1 except that the granulation ratio of the foamed polyurethane powder was set to 1.8.
[Experimental Example]
The slump of the mortar of Examples 1 and 2 and Comparative Examples 1 to 7 was not cured and the slump was carried out in accordance with KS F 2594. The mass per unit volume was carried out in accordance with KS F 2409, The test was carried out in accordance with KS F 2405, and the thermal conductivity after curing was measured by KS L 9016: 2010.
The experimental results are shown in Table 1 below.
(kg / m3)
As shown in Table 1, the slump flow of Examples 1 and 2 is 510 mm and 512 mm, and the self-leveling performance is excellent.
In addition, the mass per unit volume is also 1,525 kg / m 3 and 1,510 kg / m 3, and the compressive strength is 7.2 MPa and 6,9 MPa, which is suitable for use in plastering and has a relatively low thermal conductivity Able to know.
On the other hand, in the case of Comparative Example 1 in which the foamed polyurethane powder was replaced with sand, Comparative Example 2 in which the water reducing agent was used less than Example 1 and Comparative Examples 4 and 5 in which the thickening agent was less or more than that in Examples were used. In Comparative Examples 6 and 7 in which the particles are larger or smaller than those in Examples, the slump flow is lower than in Examples 1 and 2, and self-leveling performance is lowered.
In Comparative Example 3, which is relatively excellent in self-leveling performance, the compressive strength is significantly lower than that in Examples 1 and 2.
<Experimental Example 2> Sensory Test 1
The odor and color of each of Examples 1 and 2 and Comparative Examples 1 to 7 after 28 days of age were subjected to sensory evaluation and compared.
A total of 40 sensory tests were carried out regardless of age and gender.
* Sensory test value (9: very good, 0: very bad)
From the results of Table 2, it can be seen that the result of curing the mortar of Example 2 is far superior to that of Example 1 and Comparative Examples.
In the case of Comparative Examples 3 and 5 in which a water reducing agent and a thickening agent were added in a large amount, the result is much worse than the other examples in odor.
Claims (3)
100 parts by weight of cement having a density of 3.10 to 3.20 g / cm 3, a blast powder of 3,385 to 3,390 cm 2 / g and an autoclave expansion degree of 0.05%
A foamed polyurethane powder having a granulation ratio of 2.1 to 2.5 and a density of 0.13 to 0.15 g / cm 3 in an amount of 5.0 to 5.4 parts by weight based on 100 parts by weight of the cement;
0.2 to 0.22 parts by weight of a water reducing agent based on 100 parts by weight of the cement;
0.2 to 0.22 parts by weight of a thickener relative to 100 parts by weight of the cement;
0.2 to 0.22 parts by weight of a surfactant based on 100 parts by weight of the cement;
And 55 to 65 parts by weight of water relative to 100 parts by weight of the cement.
Self-leveling mortar with foamed polyurethane.
0.03 to 0.04 part by weight of citrus peel powder is further contained relative to 100 parts by weight of the cement.
Self-leveling mortar with foamed polyurethane.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140027831A KR101447182B1 (en) | 2014-03-10 | 2014-03-10 | Mortar with high selp leveling using expanded polyurethane |
| CN201580012788.0A CN106103378B (en) | 2014-03-10 | 2015-03-06 | Utilize the decoration mortar of the Self-leveling excellent performance of polyurathamc |
| PCT/KR2015/002216 WO2015137665A1 (en) | 2014-03-10 | 2015-03-06 | Plaster mortar having excellent self-leveling using foamed polyurethane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140027831A KR101447182B1 (en) | 2014-03-10 | 2014-03-10 | Mortar with high selp leveling using expanded polyurethane |
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| Publication Number | Publication Date |
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| KR101447182B1 true KR101447182B1 (en) | 2014-10-07 |
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| KR1020140027831A KR101447182B1 (en) | 2014-03-10 | 2014-03-10 | Mortar with high selp leveling using expanded polyurethane |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101447182B1 (en) |
| CN (1) | CN106103378B (en) |
| WO (1) | WO2015137665A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017017308A1 (en) * | 2015-07-30 | 2017-02-02 | Universidad De Burgos | Structural lightweight mortar with low porosity produced with polyurethane residues |
| CN112321235A (en) * | 2020-11-16 | 2021-02-05 | 桂林理工大学 | Aerated thermal-insulation mortar and preparation method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268972B (en) * | 2020-03-16 | 2021-12-31 | 弋阳县中泰君诺新材料有限公司 | Environment-friendly color-mixing wall cement mortar and preparation method thereof |
| CN112679897A (en) * | 2020-12-25 | 2021-04-20 | 江苏博康特建材有限公司 | Sound insulation cushion layer paste for floor ground of building floor and application thereof |
| CN113831074A (en) * | 2021-10-22 | 2021-12-24 | 武汉盛大长青建材有限公司 | Light sound-insulation terrace slurry containing polyurethane particles, preparation method and light sound-insulation terrace |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03171956A (en) * | 1989-11-30 | 1991-07-25 | New Japan Radio Co Ltd | Tone ringer |
| JP3505195B2 (en) * | 1992-07-09 | 2004-03-08 | バイエルクロップサイエンス株式会社 | Utilization of tetrazolinones as herbicides for paddy fields |
| BE1009260A3 (en) * | 1995-03-24 | 1997-01-07 | Wilfried Blocken | Insulation mortar. |
| KR100525564B1 (en) * | 2002-05-03 | 2005-10-31 | 주식회사 경동세라텍 | Covering composite for fire resistance and sound absorption |
| CN1569725A (en) * | 2003-07-24 | 2005-01-26 | 冀广宁 | Anti-cracking cement mortar |
| KR100784978B1 (en) * | 2006-05-03 | 2007-12-11 | 신순옥 | A mortar for concrete having polyurethane foam and method of thereof |
| JP5138966B2 (en) * | 2007-04-05 | 2013-02-06 | 吉野石膏株式会社 | Self-leveling composition |
| US8013029B2 (en) * | 2007-11-09 | 2011-09-06 | Shin Soon-Ok | Mortar for concrete having polyurethane foam and method of thereof |
| KR100951032B1 (en) * | 2008-06-09 | 2010-04-05 | 허정도 | Composition of Soil-Polymer-Cement Concretes using Principles of Polymer Cement Concretes |
| KR101146220B1 (en) * | 2008-12-31 | 2012-05-15 | 주식회사 성현케미칼 | A high density fire resistive coating composition for ultra high strength concrete having finish function |
-
2014
- 2014-03-10 KR KR1020140027831A patent/KR101447182B1/en active IP Right Grant
-
2015
- 2015-03-06 CN CN201580012788.0A patent/CN106103378B/en active Active
- 2015-03-06 WO PCT/KR2015/002216 patent/WO2015137665A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017017308A1 (en) * | 2015-07-30 | 2017-02-02 | Universidad De Burgos | Structural lightweight mortar with low porosity produced with polyurethane residues |
| CN112321235A (en) * | 2020-11-16 | 2021-02-05 | 桂林理工大学 | Aerated thermal-insulation mortar and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106103378A (en) | 2016-11-09 |
| CN106103378B (en) | 2018-02-06 |
| WO2015137665A1 (en) | 2015-09-17 |
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