JPH0249064A - Self-leveling material - Google Patents

Abstract

PURPOSE:To obtain a self-leveling synthetic resin material having high strength, light weight and excellent applicability and useful for the leveling of bed concrete of building, storehouse, etc., by adding a specific amount of powder of light-weight aggregate to an epoxy resin. CONSTITUTION:The objective self-leveling material is produced by compounding (A) 100 pts.wt. of an epoxy resin (preferably a bisphenol A epoxy resin, etc., which is liquid at normal temperature) with (B) 5-80 pts.wt. of powder of light- weight aggregate having particle diameter of 20-500mum and an oil absorption of <=0.05 and composed of two or more kinds of components having a specific gravity of >=1.1 and of <=1.0 (composed mainly of silica, alumina, etc.) and (C) a curing agent, preferably amines having low viscosity (preferably <=1,000cps at normal temperature) and curable at normal temperature (e.g., diethylenetriamine or triethylenetetramine) and, as necessary, (D) a defoaming agent, a surfactant, a filler, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a synthetic resin cell 7 leveling material (hereinafter abbreviated as SL material) used for leveling the base concrete of buildings and warehouses. Concerning composition.

[Conventional technology]

Conventionally, the leveling material used is gypsum-based or cement-based O8L material, and the leveling material used is 10 to 30 m.
It is customary to use a thick layer, which poses serious problems in terms of strength, weight, etc.

[Problem to be solved by the invention]

Conventional SL materials, especially gypsum-based or cement-based 8
Generally, the compressive strength of L material is around 100 to 9 f/d, and the compressive strength of the concrete as the base material is 250 to a
It was about 4 to 3/3 compared to o o kgfyci, and there were problems such as denting when a load was applied at a fixed point for a long period of time. Furthermore, the thickness of the coating must be 10 to 3011 g as mentioned above, and when applied to modern high-rise buildings, the weight increase due to the SL material increases the weight of the entire building. Beams and the like having high bending strength are required, which results in an increase in construction costs. Furthermore, if applied to an existing building, extra loads will be placed on beams, etc.), leaving problems in terms of durability.

In addition, rust on metal parts is also a problem.The present invention has excellent strength and is lightweight, and even when applied thinly to make it even lighter, it has a good external finish and is easy to apply. The purpose of this research is to provide a synthetic resin-based SL material that has the same characteristics as those described above.

Means for Solving Problem c] In order to achieve the above object, in the SL material of the present invention, an epoxy resin with a small curing shrinkage rate is used as the synthetic resin,
Preferably, the epoxy resin is mixed with lightweight aggregate.

The epoxy resin used in the present invention is a bisphenol A or bisphenol F type epoxy resin that is liquid at room temperature, and the curing agent is diethylenetriane, triethylenenatodimine, etc.
Amines that have a low viscosity of s (centivoids) or less and cure at room temperature are preferred.

The lightweight aggregate is mainly composed of inorganic materials such as silica and alumina, and preferably O has the following properties.

(1) The particle size is microspherical with a diameter of 20-4500μ (microns); if it is less than 20μ, the viscosity of the preparation increases, the textotropic property increases, and the self-leveling property (indicated by a 74-value) decreases. On the other hand, if the thickness is 500μ or more, the external finish after application will be rough.

(2) Oil absorption is 0.05 or less; use lightweight aggregate with an oil absorption of 0.305 or less.Also, even if a large amount of aggregate is added, self-leveling properties are good, and bones in the resin liquid are As a result, it is easy to obtain a lightweight SL material with a smaller curing shrinkage rate. Here, oil absorption is the amount of oil O added until the adjusted aggregate becomes putty-like, and is expressed as the amount of 7-mill oil dripped (cc) relative to the volume (co) of the lightweight aggregate. 3) Those with a specific gravity of 1.1 or more; 1. It is composed of two or more types, including those with a specific gravity of less than This has the advantage that it is easy to obtain a good external finish.

Commercially available examples of lightweight aggregates used in the present invention include:
Showa Denko Co., Ltd. Rainbow Balloon BS, Nippon Philite Co., Ltd.: Fillite, Asahi Glass Co., Ltd.: Q-CE L, Sumitomo Metal Mining Co., Ltd.: Upper 2 Ball, Nippon Silikani Co., Ltd.
;Glass micro balloon, ZEELAN INDUS
TRIES INC, :ZEEO8PHER8, etc.

Other additives include antifoaming agents, surfactants to improve flow, fillers such as silica powder, butyl glycidyl ether, 0-cresyl glycidyl ether, p-te
rt, 7'terphenylglycidyl, 1,4-butanediol diglycidyl ether, or non-reactive diluents such as DOP, DBP, benzyl alcohol, high-boiling aromatic hydrocarbon compounds, xylene resin, etc. may be used.

〔Example〕

As shown in Fig. 1, the self-leveling material in the present invention is applied to a base concrete (1), an epoxy resin primer (2) such as Jiorasu Ace JE-50 manufactured by K Aikanigyo Co., Ltd., and a single-shaped applicator. After curing, flooring materials (4) such as long access floor PVC sheets and PVC tiles are applied as a decorative coating. The SL material applied in this way is able to withstand the unevenness of the underlying concrete.
A good external finish can be obtained.

Table 11 Table 2 shows examples and comparative examples of SL materials in the present invention. The epoxy resin, curing agent, antifoaming agent, and surfactant were the same in both Examples and Comparative Examples. 'iS: Specific gravity 0.7, average particle diameter 150μ, oil absorption 0.03) and high specific gravity lightweight aggregate (ZI) with micro hollow bodies of silica-alumina ceramics
JI, AN INDUSTRIES INC.

&IZEEO8PHER8600: specific gravity 2.0, average particle size 180 μ, oil absorption 0.04), and the comparative example is calcium carbonate (Whiten SB manufactured by Shiraishi Calcium Co., Ltd.: specific gravity 2.7, average particle size 2 μ, Oil absorption 0.17)
was used as the aggregate.

Table 1 SL material: Composition of Examples and Comparative Examples Table 2 SL material: Properties of Examples and Comparative Examples The flow value indicating leveling property is twice that of the comparative example, and the curing shrinkage rate is also comparable. 1/4 of the example @
[showed that. Furthermore, the strength and light weight, which are the main objectives of the present invention, are as shown in (()) and (b).

(6) The compressive strength of the present invention is about twice that of concrete.

(b) In terms of specific gravity, SL material made of gypsum or cement is 2.
While it is about 0, the SL material of the present invention has a value of 1.0 or less.

As described above, the self-leveling material of the present invention has a high leveling effect, is lightweight, has excellent strength, and has a good appearance finish after application, compared to conventional gypsum or cement-based leveling materials. It is a self-leveling material and has an extremely wide range of uses for leveling the base of buildings, warehouses, etc.

[Brief explanation of the drawing]

[Effects of the Invention] As is clear from Table 2, the SL materials of the examples are set...base concrete 2...epoxy resin primer 3...self-leveling material 4...flooring material

Claims (5)

[Claims] (1) A self-leveling material characterized in that a synthetic resin with low curing shrinkage contains 5 to 80 parts by weight of lightweight aggregate powder per 100 parts by weight of the synthetic resin. (2) The self-leveling material according to claim 1, wherein the synthetic resin is an epoxy resin. (3) The self-leveling material according to claim 1 or 2, wherein the lightweight aggregate has a particle size of 20 to 500 microns and a microspherical shape. (4) The self-leveling material according to any one of claims 1 to 3, wherein the lightweight aggregate has an oil absorption of 0.05 or less. (5) The lightweight aggregate has a specific gravity of 1.1 or more and 1.0 or less.
The self-leveling material according to any one of claims 1 to 4, characterized in that it is made up of more than one type of material.