HU209116B - Heat-isolating powder-compositions and masses for building purposes - Google Patents

Abstract

Heat insulating powder prepns. and cavity filling masses for the building industry, contain as wt. reducing additives 5-30 wt.% cellulose and/or polyacrylonitrile beads calculated on total wt. of hydraulic binders, fillers and additives). Both types of beads are hydrophilic, are capable of forming multi-phase cavity systems in heat-insulating mortar and cavity filling masses contg. them.(Dwg.0/0)

Description

FIELD OF THE INVENTION The present invention relates to thermal insulation (mortar) powder formulations suitable for construction purposes, which are versatile in the modern construction industry.

In the construction industry, the use of insulating masonry, mortar and mortar can be used to meet the increased thermal requirements. In special cases, thermal insulation mixtures also provide sufficient sound and noise insulation. Obviously, due to the versatile requirements, different requirements have to be taken into account in the preparation of formulations, but not all of them can be fully satisfied.

In addition to providing sufficient strength, thermal and acoustic insulation, it is advantageous that the products made of the composition are easy to handle, have a large specific volume, have good adhesion and spreading, are breathable and easy to apply.

Polystyrene beads with a bulk density of 250500 kg / m ^{3 are} widely used. PSH insulating lightweight concrete. The polystyrene bead additive is of 4-14 mm continuous particle size or 4-6 mm0 mono-particle, low bulk density, closed-cell and flexible foam material. The binder is cement, the additive is of mineral origin and is intended to prevent the bead from floating out of the mass. Usually PSH concrete is used in the form of sheets or blocks depending on the intended use, e.g. for loft, horizontal or vertical thermal insulation, wall panels. .

From patent literature for the production of heat-insulating plasters and building elements, DE-OS 3 544 140 proposes the incorporation of polystyrene beads as an additive into a mixture of cement, lime, gypsum and sand. As the surface of the polystyrene bead is hydrophobic, a special mixing device and mixing mode is required to produce the plaster.

DE-OS 2,854,755. According to the published disclosure, a lightweight structure insulating dry plaster blend comprising polystyrene foam particles, a methylcellulose additive and a hydraulic binder can be prepared.

DE-PS 3 437 680 is incorporated herein by reference. Patent No. 3,600,310, prepared from a mixture of 330% cement, 9-64% lime, 85% by weight power plant fly ash, brick powder and 1-10% by weight gypsum, for use in restoration.

DE-PS 2 265 352 is incorporated herein by reference. U.S. Pat. No. 4,277,125 uses a mixture of cement, tuff and power plant fly ash as a mortar. DE-PS 1,646,495. U.S. Pat.

In addition to hydraulic binders, various thermal insulating lightweight plasters include mineral wool, expanded perlite, expanded minerals, tufa, power plant fly ash and foamed plastics.

The disadvantage is that the lightening additives are not sufficiently hydrophilic, so they cannot release water when the hydraulic binders are solidified, the applied mortar shrinks significantly, the physical differences between the hydraulic binders and the additives, e.g. they cause disintegration or floating in bulk, the coherent structure of the layer may be unevenly loosened and thus unable to provide sufficient strength. On the other hand, anti-scaling additives or surface treatment adversely affect the properties of the finished product.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat insulating and acoustic insulating powder composition for construction purposes in which the lightening agent is sufficiently hydrophilic, does not disperse, has a sufficiently homogeneous consistency and thus has good strength, good application and economical use.

The dry mortar composition of the present invention for construction purposes, comprising 20-40% by weight of cement, 5-15% by weight of lime hydrate, 25-35% by weight of sand, plastic-based foam beads and fine components, is characterized in that the composition is 100% by weight. 2 to 10% by weight of fly ash, 5 to 15% by weight of perlite, 1 to 5% by weight of FeSi powder, 5 to 15% by weight of cellulose beads, 5 to 15% by weight of polyacrylonitrile beads and optionally additional components, preferably fibrillable cellulose or synthetic fibers; contains thionics.

The construction mortar composition of the present invention, comprising 30-40% by weight of cement, 815% by weight of lime hydrate, 25-35% by weight of sand, plastic-based foam beads and auxiliary components, is characterized in that the composition is 100% by weight. Contains -5% by weight illite, 8-12% by weight perlite and 15-25% by weight polyacrylonitrile beads.

The regenerated cellulose content of the cellulose bead is 8590 m%, its particle size is 1.6-2.0 mm, its bulk density is 350-400 g / dm ³ , its specific surface area is 15-20 m ² / g and its particle number is 500.00 db / dm ³ . Cellulose beads are porous, highly absorbent, and can contain carbon dioxide gas or other excipients such as bentonite, perlite or water glass. Adding non-flammable glass powder may produce a non-flammable version. Polyacrylonitrile beads have a larger particle size, lower liters weight, and lower water absorption than cellulose beads. The PAN bead:

polyacrylonitrile content 80-901% content of auxiliary material (gypsum, perlite, sand) 5-10% particle size (mm) 3-6 liters weight (g / dm ³ ) 50-70 water uptake (g / 100 g) 120-170 The masses and powder compositions of the present invention

In order to improve its workability, lubricity and rheological properties, powders which are well-peptidizable in water (disintegrating into single fibers) and / or thionics and / or thionics can be added to the powders.

The dry mortar produced from the thermal insulating dry mortar composition of the present invention satisfies the specification

EN 209 116 Β requirements. On the basis of the examination, the results obtained are as follows:

adhesive strength 0.159 N / mm ² thermal conductivity 0.135 W / mK compressive strength 1.17 N / mm ² flexural strength 0.44 N / mm ^{2 body} density (air dry) 600-900 kg / m ³

The compositions of the present invention have excellent bonding properties in the form of aqueous layers (plasters). Beads with a high water absorption capacity provide the amount of water needed for irreversible bonding of hydraulic and weak hydraulic binders and are fed to the system as the bonding progresses. The material formed after curing is continuous, of sufficient strength, lightweight. Due to its composition and structure, it has high vapor diffusion, heat and acoustic insulation and, where appropriate, fire and flame resistance.

It is a particular feature of the products of the present invention that a significant amount of water is removed from the swollen cellulose beads in the aqueous medium to form a hydraulic bond. As a result, air-filled cavities are created around the shrink bead, where the beads can move freely. Other types of cavities include air-filled cavities inside the dried beads and CO ₂ gas filling the inside of the PAN beads. The diffusion of this gas also promotes the binding (conversion to CaCO ₃ ) of calcium oxide and / or hydroxide that is sometimes added to the powder mixture. Due to the different hollow system of cellulose beads and polyacrylonitrile beads, the multipore, multiphase hollow system is formed.

The composition and preparation of the compositions of the invention are described in the Examples.

Example 1

A dry insulating mortar composition is prepared by mixing the following components:

cement (350) 32.5 kg hydrated lime 9.5 kg quartz sand (0.0-0.4 mm) 24.0 kg FeS 2.4 kg soot 5.4 kg Mavicell (micro) regenerated cellu- lózgyöngy 8.1 kg Mavipan N-2 Polyacrylonitrile Bead 8.1 kg Perlit P-2 (0.0-1.0mm) 10.0 kg During use, 100 kg of powdered product is 50-

of water and apply the plaster using standard technology.

Example 2

The dry mortar composition is prepared from the following components:

cement (350) 33.0 kg

hydrated lime 10.0 kg quartz sand (0.0-0.4 mm) 28.0 kg illit (Mad) 3.0 kg Mavipan P-50 (2-3mm) 16.0 kg Perlit P-2 (0.0-1.0mm) 10.0 kg 100 kg powder preparation 55 of water and the prepared mortar using standard technology- . Example 3 Wet mortar the next compo composed of: cement (350) 39.0 kg hydrated lime 12.0 kg quartz sand (0.0-0.4 mm) 33.4 kg illit (Mad) 3.6 kg Perlit P-2 (0.0-1.0mm) 12.0 kg For 75 kg of the above mixture 25 kg 70%

Mavipan P-50 with a moisture content (470-490 g / l) was added and the resulting 100 kg mortar was mixed with 45 liters of mixing water and used as usual.

PATENT CLAIMS

Claims (4)

PATIENT INDIVIDUAL POINTS 1. Dry mortar preparation for construction containing 20-40% by weight of cement, 5-15% by weight of lime hydrate, 25-35% by weight of sand, plastic-based foam beads and ancillary components, characterized in that the composition is based on 100 m% 2 -10 m% fly ash, 5-15 m% perlite, 1-5 m% FeSi powder, 5-15 m% cellulose bead, 5-15 m% polyacrylonitrile bead and optionally additional components suitable for fibrillating cellulose or artificial fiber and / or lubricity thio compounds. (Previous: 1989.18.18) Composition according to claim 1, characterized in that the cellulose bead has a regenerated cellulose content of 85-90%, a moisture content of 10-15%, a particle size of 1.6-2.0 mm, a density of 350-400 g / dm ³ , specific its surface is 15-20 m ² / g, the particle size is approx. 500,000 db / dm ³ . (Aug. 18, 1989) 3. A composition according to claim 1, wherein the polyacrylonitrile-containing bead has a particle size of 3-6 mm, a lithium weight of 50-70 g / dm ³ , a water absorption capacity (g / 100 g) of 120-170, an additional material content of plaster, perlite. , sand, glass flour - 5-101%, polyacrylonitrile content 80-901%. (First of 18.10.1989) 4. A dry mortar composition suitable for construction comprising 30-40% by weight of cement, 8-15% by weight of lime hydrate, 25-35% by weight of sand, plastic-based foam beads and ancillary components, characterized in that the composition is based on 100% by weight It contains 25% w / w illite, 8-12% perlite and 15-25% polyacrylonitrile beads. (First: 1993-11-10)