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Plaster mortar having excellent self-leveling using foamed polyurethane

A technology for foaming polyurethane and decorative mortar, applied in the field of decorative mortar, can solve the problems of less than 1MPa compressive strength, reduced self-leveling performance, reduced self-leveling performance, etc., achieving excellent shrinkage strength and thermal insulation performance, excellent self-leveling performance, Aesthetically enhanced effect

Active Publication Date: 2016-11-09
DAEHO RC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, there is a problem that the compressive strength is less than 1MPa
[0010] Although the above-mentioned Patent Document 2 has improved compressive strength compared with Patent Document 1, there is still a problem that the compressive strength is only about 1 MPa when it is low, and the sound absorption rate decreases even further.
[0011] Meanwhile, although the above-mentioned Patent Documents 1 and 2 have excellent characteristics in common, the self-leveling performance is poor, and thus there is a problem that efforts to satisfy leveling should be accompanied during construction.
[0012] In particular, the maintenance of self-leveling performance is very important for decorative mortar, unlike other concrete for wall structure. As described in the above-mentioned patent documents, the higher the ratio of polyurethane foam, the higher the lightness, heat insulation and sound absorption performance. However, it causes a reduction in compressive strength, and reduces the self-leveling performance as the main performance of decorative mortar, so there is a problem that the mortar of the prior art as described above is not suitable for use as decorative mortar.
[0013] Also, the decorative mortar should basically contain fine aggregates, but due to the low specific gravity of urethane foam, it tends to separate layers from fine aggregates, cement, etc., so there is a problem of causing a decrease in self-leveling performance

Method used

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  • Plaster mortar having excellent self-leveling using foamed polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] For 480 kg of Portland cement with a density of 3.15 g / cm, a Blaine fineness of 3390 cm, a pressurized expansion of 0.05%, 25 kg of foamed polyurethane powder with a combination ratio of 2.2 in a container of volume of 1 m , 1kg of AE water reducer, 1kg of methylcellulose as a thickener, 1kg of non-ionic surfactant and 288kg of water, using a disk-type forced mixer to stir at 20rpm for 30 seconds, and at 30rpm The number of revolutions stirred for 60 seconds, and the number of revolutions of 40 rpm stirred for 90 seconds, thereby preparing a decorative mortar.

Embodiment 2

[0065] The decorative mortar of Example 2 was prepared in the same manner as in Example 1 above, but with the addition of 1.5 kg of citrus peel powder.

experiment example

[0081] In the state of the above-mentioned example 1, example 2 and comparative examples 1 to 7 without hardening, the slump was carried out according to KS F2594, and the mass per unit volume was carried out according to KS F 2409, and after hardening according to KS F 2405 specifies the compressive strength, and after hardening, the thermal conductivity is measured according to KS L 9016:2010.

[0082] The experimental results are shown in Table 1 below.

[0083] Table 1

[0084]

[0085] As shown in the above-mentioned Table 1, the slump spreads of Example 1 and Example 2 were 510 mm and 512 mm, showing excellent self-leveling performance.

[0086] Moreover, the mass per unit volume is 1525kg / m3 and 1510kg / m3 respectively, which are lightweight, and the compressive strength is also 7.2MPa and 6.9MPa, suitable for plastering, and the thermal conductivity is also low, which shows that it has relatively excellent insulation performance.

[0087] On the other hand, in the...

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Abstract

The present invention consists of a mixture, in a certain ratio, of cement, foamed polyurethane powder, a water-reducing agent, a thickener, a surfactant and water. Particularly, the density, fineness and autoclave expansion of the cement is limited and the fineness modulus and density of the foamed polyurethane powder is limited, and therefore self-leveling performance and compression strength can be increased even without a separate additional element.

Description

technical field [0001] The invention relates to a decorative mortar, in particular to a decorative mortar utilizing foamed polyurethane, having excellent self-leveling performance, compressive strength and fire-resistant and heat-insulating performance. Background technique [0002] Residential houses where most Koreans live, especially floor structures in buildings such as unit buildings or apartments, not only need to solve the problem of floor division, but also need to solve the problems of cooling, heating and sound insulation at the same time. [0003] In particular, recently, since the problem of interstory noise has attracted a lot of attention, construction is generally carried out in the following steps, that is, the thickness of the slag concrete is maintained at a thickness greater than 210 mm, and the construction of sound insulation materials and heat insulation materials is carried out. After the piping for heating pipes and the final leveling process with fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24C04B28/04C04B111/62C04B103/30
CPCC04B28/02C04B28/04C04B2111/62C04B16/082C04B2103/302C04B2103/40C04B2103/44C04B24/383C04B2103/32C04B2103/406
Inventor 李芝惠申顺玉
Owner DAEHO RC