CS243451B2 - Method of insulation plaster-faced facade's production - Google Patents

Abstract

A method for making insulating, plastered or rendered external walling consists of using grooved rigid foam panels and plastics-modified mortar. The rigid foam panels still possess a residual creep of at least 1 mm per metre, and a mortar having a plastics content of less than 5 (2-3)% is used. The prepared rigid foam panels are polystyrene panels which have been stored for less than 3 months. The mortar may contain an embedded glass fabric. In particular for relatively thick wall insulation, up to thickness of 100 mm, as demanded in modern buildings to keep heating costs to a minimum. The arrangement enables the difficulties caused by thermal expansion and warping and shrinkage of the panels to be overcome, without necessitating excessively long prior to storage times, for example of up to 6 months.

Description

The shrinkage relates to a method of manufacturing an insulated glazed facade from use. grooved stiff. 5 to 10% of the plastic, if any, of mortar-coated foam panels.

The external tents of buildings are increasingly covered with insulating layers, which are then rendered unless they are made in two layers. Heretofore, the predominant use of rigid foamed polystyrene foam boards having a thickness of 20 to 30 µm has been used. In individual cases it is also possible to use hard foam polyurethane boards. Due to the very high coefficient of thermal expansion of the polyurethane foam panels and the associated thermal movement, the layer of plaster at the insulation board contact often tears. Also in rigid polystyrene boards, cracks in the plaster layer at the joints, insulation boards are apparent in the ultimate objects, especially where thicker insulation layers or fresh rigid polystyrene boards have been used.

At a constant increase in thermal energy, insulating material thickness of 30 mm is not enough, and an insulating material thickness of 60 ms is considered to be optirole, and even 80 mm for electrically heated buildings. Plates by escaping the blowing agent during aging and the forces due to thermal expansion and contraction are so large that the imposed tension is not maintained. As a result. This causes the insulation board to move during shrinkage and temperature changes, which leads to the stress on the plaster above the joints.

It is known to use grooved foam plates in which the plates are joined with the clay in the form of a cogged connection all the better. However, since it has been shown that, in particular, the simulation leads to the same drawbacks, the storage plate manufacturers have to take time to use the plates prior to use so that the plates * have little residual additional simulations when laid. It has been shown that, in the case of insufficient length of time, the aforementioned lapses do not become defective, but only. move away. For this reason, the usual boarding times are common! - six meters.

If matt plaster is used containing a large amount of plastic mortar, the plaster is heat-treated, even if a small amount of cement is added, and is coated particularly in the joints. Still getting mmxdcím. temperatures cause some fatigue of the mattress in the joints. At the same time, the fiberglass fabric reinforcement, embedded in the plaster, is very thick and corrugated;

and by breaking it breaks and loses its first peak. These processes are all the more serious as the insulating layer becomes thicker, as the thickness of the insulating layer increases as the thickness of the insulating layer increases. and heat buildup in the plaster layer due to the greater insulation effect.

The result of all these processes is zvýiená cracking in the top layer at the joints' of insulation boards and / or release of the original shaped bottom between the insulation boards and the plaster layer of not le ^b Measured value ^p layer, and ear-part plaster kkutí vyplňuuící trench plates ^ ·

The addition of plastics in the plaster is usually more than 5%. This relatively high content reduces the solidification! other constituents of maat, reducing its strength and permeability to water vapor, and giving a soft layer that is prone to mechanical stress.

The invention overcomes these disadvantages and the use of insulation boards in

100 mn without cracking in the plaster. According to the invention, it is worn;

the walls are fastened incompletely shrunk. The foam boards have a shrinkage of at least 1 while 0.5-5% of the plaster is added to the plaster mortar. plastic masses.

Advantageously, the foam plates are allowed to remain prior to attachment. to rest for no more than three dishes.

If they leave. A rigid foamed polyatyrene sheet having a bulk density of 20 kg / m < 2 > for 30 days is then deposited, then subjected to an additional 3 to 5 years for an additional simulation of about 0.35. .. it means 3.5 mim. However, if these insulating boards do not lie 3 mm, the additional raw material is only 0.1 to 0.3. »Thus 1 to 3

The insulation boards are upevzňtjí wall winter always above the freezing point and below the temperature in the summer 4 ^{+ 0} ° C. Nažití temperature on the outer side upevotaé iso ^ C ^ slabs under a layer of plaster amounts to ^treat you EŽ + ⁶⁰ ° C ev winter - ²⁰ ° C. Consequently ^»of possible e te ^p lotto Unlike temperature internals ^y oaxitetaí down and up, ⁶⁰ ° C. This corresponds to ¹ at a coefficient of thermal expansion of 0.057 οο'ο. K for expanded polystyrene, max. contraction 3.36 iWb. According zkušenoosi oají layer lying outside plaster on insulating plates according to the thickness ^t of the VRS of ^{y is from 1 to} 2 ° ^{C at} pH .nižš4 ^p. TE-SSI average ^p lot which a coefficient of 0.012 roztažnooti io. K gives a thermal movement of 0.74 mm / o for these layers. these two movements, which lead to a temperature o o e, thus round off 2.6 degrees.

While the shrinkage takes place throughout the rigid foamed polystyrene sheet, expansion and contraction due to temperature changes occur only in its outer layer. Possible axial temperature differences are due to the thermal insulating effect of the rigid expanded polystyrene foam towards the inner wall. Therefore, thermal movements cannot be accounted for over the entire cross-section of the plates, but in most cases up to 50%.

When a tensile test according to DIN 53 571 is expanded polystyrene foam having a bulk solidified hoonnosí 2 ° kg / m ^ at rostaucí the thickness ^h b ^s to about ^5% than at the OAP ^pu d of approximately 300 kPa breaks. The load-elongation diagram of the tensile test shows the force required to achieve a certain extension. It is off daaí ° očtat forces teine STMS and contraction, wherein ^E may occur in case an oejteršío is ³⁵ ^ p ^{Rip. 30 + 13} ДОа. On the basis of these data, it is possible to calculate the following simulations and contractions for different thicknesses of insulating materials per normal joint span:

Insulation board thickness in mm

Simulation forces. contraction of the polystyrene foam sheet in Ni

1 month (additional shrinkage 3,5 oníio)

3 mixers (additional simStUO 3.0 mOrn).

10 480 430 20 May 960 860 30 1 440. 1 290 40 . 1 920 1 720 50 ‘ 2 400 2 150 60 2 880 2 580 70 3 360 3 010 80 3 840 3 440 90 4 320 3 870 100 ALIGN! 4 800 4 300

Thermal and simulation movements can be sustained under forced tension if the surface of the rigid foam panels, preferably bilaterally has recesses or elevations, e.g. A prerequisite for permanent anchoring, however, is that the adhesive and coatings used do not soften and do not form but remain rigid, i.e. without plastic or elastic deformation. In addition, the shear force of the coating may be greater than the shrinkage or contraction forces. *

Folders

Example (% wt%)

This is achieved by using the usual perfect calcium-aceine coatings of the following composition which are admixed with at least 5% w / w. plastic materials.

1 12 3 4 5 6 cement 17 14 12 15 Dec 10 8 quartz sand 66 69 73 65 68 66 · quartz flour 1 - oj 1.0 - 2.5 calcium hydrate. - 1 - 4 6 8 chalk 1 0.5 0.7 0.2 1 - water 13 12 12 12 12 12 preservative 0.01 , 0.01 0.01 0.01 0.01 0.01 oetylcllslozl 0.3 0.2 0.1 0.1 0.1 0.05 polyvinylprupiuoate 1.0 '.5 2,0 2.2 2.7 3.4 fibers 0.7 1,8 0.1 0.5 0.2 - cow glass plastic kokoso- siselové hair fibers fibers fibers fibers

Quartz sand

The quartz sand used has a grain size up to

2.5 mm.

The grain distribution is

25% 0.1 to 0.3 om 25% 0.3 to 0.6 mm 40% 0.6 to 1,2 mm 10% 1,2 to 2.5 mm

Quartz flour

Said quartz flour moiety may also be referred to as quartz sand with grain sizes below 0.1 mm.

In order to keep the rigid master slab in a forced oapha, the number of depressions must be increased as the thickness of the slab increases. Because e.g. rigid polystyrene foam volume hmoUnouti 2 ⁰ kg / m ^ ^(oapěěí in pressure at 1 ^{0% p} omároéo compressed ^p ccording to DIN ^{53 4} 21 ¹⁰⁰ and ^from 140 kPa) begins to deform even at a load of 20 kPa needs, the number of or the area of the depressions so large as to prevent deformation of the foam in these depressions filled with hardened foam due to the shrinkage and contraction. This is achieved when the lateral surfaces of the depressions per 1 m · panel area have a total of 2,400 cm ·. Because shrunk rigid foam will shrink and therefore additional stumbling * jzolačnch plates for filler plugs or oopky mlty .. from arising filled Deepen acts functionally at least 50% of these side ptoc ^h te ^each 1 ^200th cm ^. ЭД1 OEJV ^EE admitted OAP ^{pET 20} kPa to these noplqy above ^p lo ^E or stopper is force simStsn conn. Contraction vrehní and bottom side of the foam panel to dispooZci overall strength of 4800 N / m, whereby it is achieved that the force of contraction and sweeping

- in a forced oappea.

Plastic additive

The addition of plastics is preferably less than 3.5%. The oitithin range is 1.5 to

%. Possible plastics are the ethers 100, 8, 8, 9, 8, 8, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 9, 9, 9, 9, 9 styrenillates, vinyl acetate and its copolymers,, dispersed in water ·

Since the thermal movement of the panels is noticeable in the deeper layers, customary cement meets with the addition of 5% or more plastic can be used to fasten the panels to the support frame. The disadvantages of the plastic can therefore be tolerated in this layer.

The process according to the invention is exemplified by the following examples wherein many of the components are given in% by weight.

100 mm thick ^d English from the ^h e ^p ol ^y with ^those RENOV ^{é> p} V ° /, v · ^h Weigth about 20 k ^g / ° \ with mutually adapted square recesses having a side of 10 mm and a depth of 4 mm, the distance between indentations 10 mm, the peripheral area of the depressions on each side of the plate a total of ^4,000 cm ² / m ^2, is fixed with cement-lime mortar ^p lastic ^p řísadLou ^s taoty the bearing wall and then they are applied lime mortar with addition of 1.3% plastic containing 0.3% methylcellulose and 1% polyvinyl propionate and 0.7% cow hair to increase firmness by completely depressing the depressions. A glass sheet is then placed in this layer and covered with the same material. The thickness of the layers is at least 8 mm in the depression and at least 4 mm in the other areas

When this layer has solidified, a plastic scratched plaster, a mineal scraped plaster, a mineal plaque or a colored paint are applied in a conventional manner.

Example 2 A ⁸⁰ mm thick ^l olys ^t yréOov ^e Tu ^h é foam ^boards, vol. Tamtnost about ²⁰ kg / m ^ s Oboda ^ uo * does not protrude ^ CIMI rounded nubs diameter 48 mm E 5 mm high, spaced 50 mm (lateral ^d ^ OCHA Uve enýc ^{h y} výšenin total of 3 to ⁰¹ 4 cm preach ^d E ^ IOS) at ^ Wii bearing wall lime mortar with addition of plastic, and then applied on them with the addition of lime obIíi 1.7 ° plastic The composition comprises 0.2% methylcellulose and 1.5% polyvinyl alcohol, and containing 1.8% short glass fibers to increase the footwells by fully depressing the glass silk fabric and then fixing with the same mat. Thickness of the Sine layer at least 9 mm in recesses and at least 4 mm in other areas.

When the laminate solidifies, a scratched plaster of plastics, a scratched plaster, a spherical plaster or a paint coat is applied to the OL in a conventional manner. '

Example 3 A ⁷⁰ mm thick herein ^hé Lyst ^ ^p ^ yd ^ c ^ o ^ o ^ ^é new English ^d, OBB. ²⁰ kgo ^, scalded on both sides by intersecting grooves, groove cross section 6x6 mm, spacing o

100 mm (lateral surface area of depressions on one side in total 2,400 cm-1), is fastened with a cement-bonded cement-coated matt to the bearing wall and then a sieve of cement-cement-matt and 2.1% of the plastics are applied to them Consisting of 0.1% meetcellulose and 2.0% polyvioylpropionate, containing 0.1% man-made fibers to increase peraoosi by completely depressing the depressions. A glass silk fabric is then placed in this layer and fixed with the same mass. The thickness of the layers is at least 10 mm in the depressions and at least 4 mm in the other area. ’.

When the composition has solidified, a suitable plastic scraped plaster, mineral scraped plaster, a light gray paint or a colored paint is applied in a conventional manner.

EXAMPLE 4 mm thick rigid polystyrene foam panels with round holes on both sides, ordering weight about 20 kg / m \ hole diameter 3 * mm, depth 2 mm, spacing 10 mm (side area of holes on each side total 1 364 cm), is attached to the support wall with a lime-cement plastic and then a lime-cement mixture of about 2.3% of the plasma is applied thereto. Compound consisting of 0.1 methylcellulose and 2.2 polyvinyl propionate and containing 0.5% coconut fiber to increase the strength by completely filling the recesses · The glass silk fabric is then inserted into this layer and fixed with the same mass · Thickness layers at least 6 mm in the recesses and 4 mm in the other area ·

When the material has solidified, a suitable plastic scraped plaster, mineral scraped plaster, mineral coated plaster or colored paint is applied in the usual way.

Example 5 mm thick rigid polyurethane foam plates, app. Weight about 30 kg / m ^ 8 intersecting grooves on both sides, groove cross section 7x7 mm, groove distance 50 mm (total area of inner groove walls on each side of the panel total 5,600 cm ² ) m ² ) is fixed to the bearing wall with a lime-cement mortar with plastic and then a mixture of lime-cement mortar and 2.8% of plastic, consisting of 0.1% methylcellulose and 2.7% polyvinylpropionate, containing 0.2% of siaal fibers, is applied to them to increase the strength by completely filling the recesses · The glass silk fabric is then placed in this layer and fixed with the same mass · The thickness of the Sine layer in the recesses is at least 11 mm and the other surface is at least 4 mm ·

After the material has solidified, a suitable plastic scraped plaster, mineral scraped plaster, mineral coated plaster or colored paint is applied in the usual way.

For example, a mm thick rigid polystyrene foam plate, app. Weight about 20 kg / m @ 2 with cross-cut strips on both sides, 1 x 1 mm diameter and a distance of 20 mm (total area of grooves on each side of the plate total 2,000 cm) 1), is attached to the bearing wall with lime-cement mortar 8 by the addition of plastic and then a mixture of lime-cement melts and 3.5% plastic, consisting of 0.05 methylcellulose in 3.45 polyvinyl propionate, is applied so that the depressions are completely filled. A glass silk fabric is then inserted into the layer and fixed with the same mass. The thickness of the layer in the depressions is at least 5 mm and not the other surface 4 ф · ·

When the mass solidifies, a suitable plastic scraped plaster, mineral scraped plaster, mineral coated plaster or colored paint is applied in the usual way.

Claims (2)

SUBJECT OF THE INVENTION Method for producing an insulated plastered facade using grooved rigid foam cladding panels fastened with mortar, optionally modified with 5 to 10% plastic, characterized in that incompletely shrunked foam panels having a residual shrinkage of at least 1 mm / m are fixed to the bearing walls, 0.5 to 5% by weight * of plastic is added to the plaster mortar 2. Method according to claim 1, characterized in that the foam plates are left to rest for a maximum of three months before fixing.