DE10020956A1 - Brick and process for its manufacture - Google Patents

Abstract

The invention relates to a wall block and to a method for producing the same. The inventive wall block has a lower mass than conventional wall blocks as well as excellent insulating properties. Said wall block consists of a lightweight material selected from the following: expanded glass, pearlite, expanded clay or mixtures thereof. Said lightweight material is obtained by liquid phase sintering or fusing pre-expanded expanded glass granulate, expanded clay granulate, pearlite or mixtures thereof and forms an aerated structure which serves as an insulating core. Said insulating core is at least partially surrounded by a shell body consisting of a conventional wall block material. The inventive wall block is produced by filling a corresponding shell body with the lightweight material and heating the pre-expanded lightweight material, which has a residual expanding agent content of at least 0.1 mass % and is used in the form of a granulate, to above the softening temperature of the granulate. An additional volume expansion takes place and the surfaces of the granulate are fused.

Description

The invention relates to a brick and procedural ren to its manufacture, such bricks without further ado, like conventional bricks for Construction of single and multi-family houses as well as in the Troc kenbau can be used, and over excellent nete insulation properties.

Bricks or bricks have been on the building site gate, as brick masonry, brick ceiling stones or Hollow brick bodies for a relatively long time both Proven technically as well as economically. In the course of Over the years these components were used increased market demands continuously improving. These improvements concern fen in particular the insulation properties and Essentially thermal insulation. So the Ent windings to porous lightweight bricks with filigree Hole patterns, but those from Festig in particular limits are set for reasons of So minimum bulk densities and web thicknesses are adhered to in order to Adequate strength and security guaranteed during transport and processing animals and avoid unwanted destruction conditions occur before processing and despite which achieves sufficient static properties can be.

Are such filigree stones with a small bridge  used thick, this also affects the Sound insulation and longitudinal sound insulation in undesirable ter way.

Even lightweight concrete blocks or aerated concrete have limits, because the desired thermal insulation properties and required strengths are contrary to each other and consequently the corresponding advantages and disadvantages weighed each other and to a corresponding comm must lead promiss.

From the point of heat and sound insulation could theoretically a greater wall or wall thickness can be chosen, which in any case to areas leads to losses.

To meet the required thermal insulation it is usual, external organic or inorganic Thermal insulation composite systems on such brick walls or use blankets, which in turn become one Thickness increase and at an increased time and cost to spend effort. Such double-shell wall structures, which from a base layer with glued and / or mechanically attached insulation layer with additional Exterior plaster are formed in the renovation of old buildings, in which the disadvantages mentioned can be accepted, used, for the new building, where there is none on the old building Consideration must be given, but this is again just a disadvantageous compromise.

Attempts have also been made to use expanded clay or pumice To produce hollow blocks in which an inte free insulation, without additional thickness increase is there. For such integrated insulation  different organic materials used. The integration of such organic insulation materials But if there were very great difficulties, they struck attempts by the brick and tile industry to fail Protein foam combined with brick flour into one Brick foam should be processed as during the foaming process, especially in the case of larger buildings large internal stresses have been induced are the corresponding loss of strength had called.

It is therefore an object of the invention, a brick and to propose appropriate manufacturing processes with which inexpensive bricks are available supply can be made at a relatively low Density, high strength, good sound and heat have insulation properties and can be processed inexpensively are.

According to the invention, this object is achieved with the features of claim 1 for a brick and the Merkma len of claims 14 to 25 for corresponding Her position procedure solved.

A brick according to the invention consists essentially chen from two parts, whereby this is one can act a scarf body that consists of a static load-bearing material, such as B. conventional Wall or brick material, fired clay or Clay, lightweight concrete made of expanded clay, pumice or the like There are light aggregates, aerated concrete or wood concrete. The second essential part of such a wall nes is an insulation core enclosed by the formwork body is and from by liquid phase sintering from Bläh glass, perlite, expanded clay or mixtures thereof or  by sintering pre-expanded expanded glass granules lat, expanded clay granulate, perlite or mixtures Having pore structure has been formed.

The scarf body should at least be at its top Front face partially or completely open, see above that the materials mentioned at the beginning or the ent speaking pre-expanded granules in the Schalerkör filled in by or a prefabricated insulation core in can be pressed into the formwork core. The insulation core is therefore at least partially from Schalke core, at least enclosed on four sides.

For a secure hold of the molded or molded pressed insulation core can inside the formwork core Bridges and / or grooves to be formed, the insulation Hold core by positive locking.

When forming the insulation core, two can be older native, suitable paths are followed, with a can be done so that a pre-expan dated granulate, as a lightweight material that selected is made of expanded glass, expanded clay, perlite or mixtures of which, with a residual amount of blowing agents of at least at least 0.1% by mass either directly in the scarf body or filled in a mold, then one Warming up to temperatures above the Er softening temperature of the granules is carried out, which lead to an additional volume expansion and Sintering of the granulate surfaces leads. Doing so the insulation core is formed directly in the formwork body, or it can be removed from the mold after the demolding process pressed in the open part of the scarf body and if necessary with the given already mentioned if relatively short trained webs before  pulls on the respective end face areas, so arranged above and below inside the scarf body are fixed.

In the second alternative, a mixture that from 60 to 95% by mass of a lightweight aggregate, selected from expanded glass, perlite and expanded clay as well optionally also mixtures thereof, with 40 to 5 Mass% of a soda water glass mixed into one Scarf body or a shape can be filled and in Follow up with a warming under training of soda lime glass by liquid phase sintering Light aggregate particles connected like a network and so the insulation core can be formed. Becomes the insulation core is made in a shape, as previously described, after demolding in the open at least on the upper face Formwork core pressed and held.

If necessary, the mixture may be added before heating Temperatures in the range of 50 to 95 ° C who dried the. The sintering then takes place in the temperature range between 550 ° C and 1000 ° C, this in one Period between 0.1 to 5, preferably in the range between 0.1 and 0.5 h.

Incidentally, there is a corresponding procedure for manufacturing Position of molded parts made of light materials in DE 197 12 835 A1 described in detail and it is said to the corresponding disclosure content in full be resorted to.

In the former alternative to manufacturing using a brick according to the invention of pre-expanded expanded glass granulate, expanded clay granulate  lat, perlite or mixtures thereof with which a Pore structure can be obtained as an insulation core are described in more detail below.

The insulation core present in a brick according to the invention can consist exclusively of pre-expanded expanded glass, expanded clay or perlite, without the usual binding or sintering aids being further contained. It can be formed from the respective granules, which are sintered together and thus obtain a relatively light brick with a relatively small bulk density, but higher strength, who can. The insulation core can have a closed-pore structure or such a structure. It can have a bulk density ranging from 250 kg / m ³ to bulk densities in the range of 180 kg / m ³ , with compressive strengths of approx. 1.6 N / mm ² , bending strengths of approx. 0.9 N / mm ² and tensile strengths of about 0.2 N / mm ² .

The insulation core has a low thermal conductivity is not flammable, acid and base resistant, dimensionally stable, resistant to biological recycling (Rodents, beetles, mold, etc.) and safely recycled clebar. It absorbs almost no moisture and can therefore in many cases in the building materials sector len be used cheaper than this conventional building materials and components is possible.

When producing the brick according to the invention can be done so that preferably pre-expan dated expanded glass, but also perlite or thermal pre-expanded expanded clay used as granules the, whereby in any case a residual amount of expanded of at least 0.1% by mass up to 3% by mass should be kept.  

The granules prepared in this way are mixed into one at least two parts existing form or in one Scarf body usually made for masonry or Bricks used and given material finally heated in the form or the scarf body. The heating takes place in a temperature chamber rich, where the respective granules soften, so the corresponding softening temperature is reached and is held. As a result of the warming, a white tere volume expansion of the starting granules on and the granulate surfaces sinter together, so that, if necessary, the finished after demolding Insulation core is available or inside the Schalke core is formed.

Since the pre-expanded starting granulate as a result of Heating continues to experience a volume increase, it is favorable, the form or the scarf body with the off gangs granules only with a volume fraction of min at least 80% and at most 95%, preferably with at least Fill in 85% by volume. This can cause heating a closed-pore structure that prefers the min least two-part form or the scarf body full constantly filled in, received and the desired own be achieved.

After filling the form or the scarf body, where possible on an even filling of the Formwork core or form content should be observed, the pre-expanded starting granulate, the min at least 80% of the final volume, preferably at least 85% of the final volume, in the form or the scarf body warmed and expanded.

It is advantageous to heat in two stages  perform in the two stages with under different heating rates is heated. In both stages the heating rate should be constant. This can uniform heating over the entire volume secured and a uniform structure be formed. So should be in a first warming stage a higher heating rate, e.g. B. 5 K / min and in second heating level with a lower heating rate, e.g. B. be heated at 2 K / min. The warming in the Most stage should be up to temperatures of 650 ° C and in the second stage up to approx. 750 ° C if Use pre-expanded expanded glass as the starting granulate has been det.

After the required softening temperature for the granulate has been reached, the corresponding temperature over a certain period of time, approx. Held for 30 min so that the granulate surface si sintered together.

Following the heating, before the defor men of the shaped body from the mold or with the im Scarf body-formed insulation core a slow down cooling take place to residual stresses in the finished Avoid insulation core if possible. He can required cooling time down to ambient temperature up to 10 hours. The starting granulate used should be in a grain size range of 1 to 8 mm, preferably used from 2 to 4 mm, one give even grain in the narrow tolerance range may require shorter heating and holding times and ensures an even structure.

He in the manufacture of such an insulation core required blowing agent content should be in the range between  between 0.1 and 3% by mass.

In contrast to conventionally produced moldings Made of foam glass, which is made from the usual raw materials Quartz sand, calcium carbonate, potassium feldspar, iron oxide and sodium carbonate, to which only a minor Proportion of waste glass can be added the molded articles according to the invention can be full constantly made of expanded glass obtained from waste glass nulate can be produced. Used glass washers be ground and mixed and after addition a blowing agent, e.g. B. sugar derivative, this will powdered mixture granulated and then thermally pre-expanded and so that the pre-expanded Granules about 80 to 95% of the volume, as in the fer insulation core occurs.

This can be done with this thermal pre-expansion that the necessary for the production proportion of blowing agent in the pre-expanded expanded glass nulate is already included. For example through a relatively quick temperature treatment, the leads to thermal expansion.

It can be equivalent when using the already mentioned two other starting granules, the just if possible in the pre-expanded form can be found, but where other heating rates and temperatures to be reached that the softening temperatures of the respective granules correspond, result.

There can also be an acoustic decoupling between reach the scarf body and insulation core different flexible materials can exist. So  For example, the scarf body with an ent speaking inner coating before filling or the pressing of a prefabricated insulation core ver be seen or the insulation core with a suitable Material are coated on the outside, for example as corrugated cardboard can be used, the same can also be used as packaging in good time.

In addition, the number of cavities or cavities mern even with relatively low thermal conductivity much smaller than with a conventional wall brick is the case. So compared to convents tional porous light brick stones of warmth forward resistance can be increased by approx. 30%, which with future increase in heat to be achieved insulation values according to the low energy house standard no further increase in the thickness of a wall and consequently, no reduction in usable space leads.

With the masonry stones according to the invention, the required stone strength class for one- and two-family houses can be easily complied with at a relatively small stone density ≦ 600 kg / m ³ .

Regardless of the raw materials used this heat treatment is not just a composite between the light aggregate particles or the granu lat reached, but it also finds a connection of the insulation core to the formwork under training a glass melt instead.

As already indicated, there are several Alternatives, such as a brick according to the invention can be manufactured. For example, the  Scarf body (e.g. made of clay) while the firing pro Process in the cooling phase with preheated granules (Expanded glass granulate) are filled, whereby for the pre the waste heat from the burning process that can. After the filling is done again until to the softening temperature of the granules or Tempera required for liquid phase sintering door warmed.

A filling funnel can be used for filling austenitic steel is used, which has a has sufficient heat resistance.

Especially the usable expanded glass granules white have a good flow behavior so that the filling len the scarf body in a very short time by a few Seconds. During filling, should however, the softening temperature of the granules is not be crossed, be exceeded, be passed.

The heating is advantageously carried out in one Rapid firing furnace, e.g. B. a roller oven, with a Filling device in the cooling area by several Brick scarf twisted upright next to each other Kiln furniture plates are treated thermally can.

For smaller brick factories that have discontinuous Ovens such. B. mutually operated bogie hearth furnaces should have the brick formwork body after drawing gelbrand automatically with a handling device from Removed the bogie and a separate filling station be fed. After filling the Formwork body with the light aggregate or granulate can the formwork on a firing pad like  which is automatically placed on a bogie and the filled bogie wagons of the final warming phase (Tempering) are supplied.

The invention is intended to be illustrated below by means of examples are described in more detail.

Show:

Figure 1 shows an example of a scarf body of a brick according to the invention.

Figure 2 shows another example of a brick according to the invention, consisting of the formwork body and insulating core with formed hollow chambers and reinforcement channel.

Fig. 3 is a two-part brick according to the invention, as a so-called moving brick in two achievable sizes for length compensation;

Fig. 4 shows another example of a masonry block according to the invention;

Fig. 5 shows an example of a wall stone according to the invention, with a tongue and groove connection

Fig. 6 shows a structure of a plurality of masonry blocks according to Fig. 5.

The insulation cores 2 can, as described in DE 197 12 835 A1, be made in a separate form or in the scarf body 1 for a brick according to the invention. For this purpose, the light aggregates already mentioned are coated with the sintering aid and either placed in the formwork body 1 or this mass is brought into the desired shape by an appropriately suitable shaping process (e.g. axial pressing, extruding, casting) and then dried . This green body can be subjected to a subsequent thermal treatment, in which a liquid phase sintering takes place, whereby the light aggregate particles are connected to one another at points. During sintering, an ion exchange occurs between the liquid phase and the particles, which leads to a material-specific bond, so that a correspondingly porous structure of low bulk density and relatively increased strength is obtained.

If the insulation core 2 is made from pre-expanded granules without the addition of a binding agent or sintering aid, either a form that is as divisible as possible or the formwork body 1 is filled with the corresponding pre-expanded granules. The filling takes place in a loose bed, with a filling level as uniform as possible, e.g. B. by shaking, who should obeyed.

During the temperature treatment of this loose bed, a renewed volume expansion (expansion process) occurs and the starting material foams again, so that the bulk density is further reduced. The starting granulate has about 85% of the pore volume of the finished insulation core 2 . Thus, similar to the EPS production, starting from a porous pre-product in granular form, there is again an increase in volume of approx. 15% in the shaping.

Specifically, a brick according to the invention, as it is also shown in the figures, can be produced in a preferred form in such a way that a scarf body made of 1 fired clay is filled with expanded glass granulate, which is available under the trade name "Liaver". The expanded glass granulate has a bulk density of 220 kg / m ³ and is used with a grain size between 2 and 4 mm. The expanded glass granules used have an increased residual blowing agent content, which should be at least 0.1% by mass.

The loose bed in the shuttering core 1 is leveled out by shaking.

A brick blank prepared in this way can then in a discontinuous chamber furnace or in a discontinuously operated push-through furnace with a heating rate of 5 K / min to 650 ° C and subsequently with a heating rate of 2 K / min to about 750 ° C, the softening temperature of the granules heated and kept at this temperature for a period of about 30 minutes, the surfaces of the granules fusing or sintering together and the starting material being additionally inflated, so that a further increase in volume compared to the loose bed can be achieved and accordingly inside of the scarf body 1 formed insulating core 2 completely fills the inner volume of the scarf body 1 .

Following the heating and holding phase cooling within the furnace chamber via a Period of about 10 hours.

If necessary, the bricks can then be ground flat  open, palletized and ready for dispatch be, the upper and lower end faces of the Bricks also in the form of a tongue and groove connection can be edited.

The bricks obtained in this way have those in Table 1 listed properties.

In FIG. 1, a shell body 1 without insulating core. 2 The scarf body 1 can, for example, be extruded from clay in the form shown and cut to the appropriate format, the cutting width here specifying the height of a corresponding brick.

The scarf body 1 can be made of clay and then, as already described, fired in an oven. After firing, a filling with the starting material for the insulation core 2 and the corresponding subsequent thermal treatment can be carried out.

In the example shown in FIG. 1, a plurality of webs 3 have been formed on the inner wall of the scarf body 1 , these running parallel to the direction of extrusion and, in addition to increasing the strength of the scarf body 1, also secure fi xation for the trainee or to be recorded Insulation core 2 can represent.

The webs 3 can also be arranged in an inclined shape, or be provided with contours, which can be groove-shaped incisions or waveforms to further improve the hold of the insulation core 2 .

The scarf body 1 shown here can not only, as shown, be open on its upper end face, but also the lower end face can be open, wherein the filling of the scarf body 1 can then take place in a set position on a base plate on which the filled scarf body 1 can then be thermally treated in an oven.

In addition, diametrically opposed semicircular recesses 4 are shown, wherein shapes other than the semicircular shape can also be used.

These recesses 4 can be the starting point for a reinforcement channel 10 , as has been formed in the example shown in FIG. 2. Through such reinforcement channels 10 then reinforcement elements that extend over several bricks arranged side by side can be guided and increase the hold formed from a variety of such bricks wall.

In addition, hollow chambers 8 are provided in this example, which can be used in addition to a reduction in mass, improved thermal insulation and for anchoring reinforcement elements.

Both the reinforcement channels 10 , as well as the hollow chambers 8 can be using appropriately shaped cores, the z. B. from a metal with higher melting temperature than the insulating core material during heat treatment. In this case, such cores can be formed on a surface which can be placed on the upper end face of the scarf body 1 , this plate-like molded part, with a correspondingly adjusted filling quantity of the light aggregate, can also lead to an upper, relatively flat end face of a brick according to the invention, without additional Post-processing, such as face grinding, must be required.

In Fig. 3 is a '"of a Mau the invention, which is provided as a displacement element for adaptation to different lengths formed as first crystal, is shown. Here, the two individual parts 1 and 1' and 1" of two items 1 parallel to each other Aligned longitudinal webs S available, which are alternately left empty and filled with an insulation core 2 , so that the meandering arrangement of the insulation cores 2, which can be inserted into each other at parts 1 'and 1 "and pulled apart depending on the required length.

The smallest length of such a Mauerstei nes is shown in the upper representation and a larger one in the lower representation of FIG. 3.

In the example of a brick according to the invention shown in FIG. 4, handle pockets 7 are additionally formed on the upper end face in addition to a reinforcement channel 10 , for better handling, the handle pockets 7 , as in the example according to FIG. 2, also having a correspondingly designed shape are producible.

On the scarf core 1 here are diametrically opposed end faces in the form of double webs 9 Darge, which can also have a favorable influence on the insulation behavior and strength. But it can also be formed on the two other sides of such a scarf body 1 such double webs 9 .

If, in this and in the other examples described, a prefabricated insulating core 2 is pressed into a formwork body 1 , it may be advantageous and sufficient to design the webs 3 only in the area of the upper and lower end faces and not, as in the example according to FIG. 1, continuously , so that the pressed-in insulation core 2 is hooked after pressing.

In the example of a brick according to the invention shown in FIG. 5, the upper and lower right end faces are formed as tongue and groove connections 10 , 11 , so that only a slight skill and specialist knowledge are required for building a wall, with the Tongue and groove connection an exact positioning of several bricks, as shown in Fig. 6, can be easily achieved.

In addition, hollow chambers 8 are again formed in the insulating core 2 , which can range from the upper to the lower end face of the brick.

The bricks according to the invention can be bricked up or crunched using a conventional thin-bed mortar. In addition, there is the possibility by the introduction of reinforcement elements th, which are guided through the reinforcement channels 10 but also continuous hollow chambers 8 , to stack whole masonry from a plurality of such bricks and to bring them completely as wall elements to the construction site.

The inventive method can without white teres the hollow chambers defined positioned arranged be net, so that an alignment of the hollow came in relation to hollow chambers in masonry are arranged above and below, continuous form cavities within the wall the also vertically aligned reinforcement elements or installations (building services) can be managed nen.

The reinforcement elements can be backfilled mortar coupled to the stone composite and so white be protected against corrosion.

Since the reinforcement elements at least completely from Insulation core material are enclosed, heat bridging be avoided.  

Table 1 property profile

Claims (25)

1. Brick, in which a lightweight building material selected from expanded glass, perlite, expanded clay or mixtures thereof that forms a pore structure as an insulating core ( 2 ) through liquid phase sintering or sintering of expanded glass granulate, expanded clay granulate, perlite or mixtures thereof , of a scarf body ( 1 ) from a conventional brick material, is at least partially enclosed. 2. Masonry according to claim 1, characterized in that the formwork body ( 1 ) is formed from fired clay, clay and clay mass as well as wood concrete, lightweight concrete from expanded clay, pumice or similar light aggregates. 3. brick according to claim 1 or 2, characterized in that the scarf body ( 1 ) is partially or completely open on at least its upper end face. 4. Brick according to one of claims 1 to 3, characterized in that webs ( 3 ) and / or grooves are formed on the inner wall of the scarf body ( 1 ). 5. Brick according to one of claims 1 to 4, characterized in that on upper and / or lower end faces of the scarf body ( 1 ) from savings ( 4 ) are designed for carrying out reinforcement elements. 6. Brick according to one of claims 1 to 5, characterized in that the formwork body ( 1 ', 1 ") is formed in two parts with a plurality of parallel longitudinal webs ( 5 ) aligned with each other, in each case in pairs between these longitudinal webs ( 5 ), alternating air or an insulation core ( 2 ) are present and a part of the scarf body ( 1 ') in the two-th part of the scarf body ( 1 ") by appropriate meandering arrangement of the insulation cores ( 2 ) can be inserted. 7. brick according to one of claims 1 to 6, characterized in that in the insulation core ( 2 ) handle pockets ( 7 ), reinforcement channels ( 10 ) and / or hollow chambers ( 8 ) are formed. 8. Brick according to one of claims 1 to 7, characterized in that double webs ( 9 ) are formed on the formwork core ( 1 ). 9. Masonry according to one of claims 1 to 8, characterized in that the upper and lower re end face are formed as a tongue and groove connection ( 11 , 12 ). 10. Masonry according to one of claims 1 to 9, characterized in that an acoustic decoupling is present between the inner wall of the formwork core ( 1 ) and the insulating core ( 2 ). 11. Brick according to one of claims 1 to 10, characterized in that the insulating body ( 2 ) has a bulk density ≦ 600 kg / m ³ . 12. Brick according to one of claims 1 to 11, characterized in that the insulating body ( 2 ) is a closed-pore structure. 13. brick according to one of claims 1 to 12, characterized in that light surcharge fabric particles selected from expanded glass, perlite and expanded clay, forming a soda lime glass are connected to each other in a network-like manner. 14. A method for producing a brick according to one of claims 1 to 13, characterized in that a formwork body ( 1 ) in its interior with thermally pre-expanded expanded glass, thermally pre-expanded perlite or thermally pre-expanded expanded clay, with a residual blowing agent content of at least 0.1 mass. %, filled as granules and then heating to temperatures above the softening temperature of the granules, which leads to a further volume expansion and to the sintering of the granule surfaces. 15. A method for producing a brick according to one of claims 1 to 13, characterized in that thermally pre-expanded expanded glass, thermally pre-expanded per lit or thermally pre-expanded expanded clay with a residual blowing agent content of at least 0.1% by mass, given as granules in a mold becomes; then heating up to temperatures above the softening temperature of the granulate, which leads to a further expansion in volume and to the sintering of the granulate surfaces, and the molding obtained is demolded as an insulating body ( 2 ) and pressed into a formwork body ( 1 ). 16. The method according to claim 14 or 15, characterized in that the volume inside the scarf body ( 1 ) or a mold before heating is filled with at least 80% and a maximum of 95% with the granules. 17. The method according to any one of claims 14 to 16, characterized in that a granulate with Grain sizes in the range of 0.25 to 8 mm are used becomes. 18. The method according to any one of claims 14 to 17, characterized in that a restge holds blowing agent in the range 0.1 to 1 mass% is observed. 19. The method according to any one of claims 14 to 18, characterized in that a from recycling glass with the addition of an organic blowing aid by means of preserved, thermally pre-expanded Expanded glass granulate is used. 20. The method according to claim 19, characterized in that as a blowing agent Sugar derivative is used. 21. The method according to claim 18 or 19, characterized in that the thermal pre expansion is carried out in such a way that the Blowing agent content as residual content of the blowing agent results.   22. The method according to any one of claims 14 to 21, characterized in that using the heat from the firing process for the produc- tion of a shutter core ( 1 ), preheated Granu lat filled in the shutter core ( 1 ) and further heating until reaching Softening temperature of the granules and for melting the granulate surfaces is carried out. 23. A method for producing a brick according to any one of claims 1 to 13, characterized in that a mixture consisting of 60 to 95% by mass of a light additives, selected from expanded glass, perlite and expanded clay with 40 to 5% by mass of one Natronwassergla ses filled in a formwork body ( 1 ) and when heated to form a soda lime glass by liquid phase sintering, the light aggregate particles are network-like and formed in the formwork core ( 1 ) of the insulation core ( 2 ). 24. A method for producing a brick according to any one of claims 1 to 13, characterized in that a mixture consisting of 60 to 95% by mass of a light aggregate, selected from expanded glass, perlite and expanded clay with 40 to 5% by mass of a Soda water glasses placed in a mold, in a heat treatment with the formation of soda lime glass by liquid phase sintering, the lightweight aggregate particles network-like who and the molded body thus obtained after demolding in a formwork body ( 1 ), as an insulation core ( 2 ) is pressed. 25. The method according to claim 23 or 24, characterized in that the heat treatment conditions at temperatures between 550 and 1000 ° C over a period of 1 h to 5 h and the molded body or insulating core ( 2 ) is sintered.