JP4631491B2 - Lightweight glass building materials - Google Patents

Description

  The present invention relates to a lightweight glass building material, and more particularly to a lightweight glass building material having excellent frost resistance.

Conventionally, foam glass manufactured by blending dolomite (MgCO ₃ · CaCO ₃ ) powder as a foaming material into a finely pulverized soda-lime glass such as a single plate glass has been known (for example, Patent Document 1), and as a heat insulating lightweight exterior material using this foam glass, a foam layer (bulk density 0.3 to 0.6), an intermediate layer (bulk density 1.0 to 1.7), and dense glass Laminated foam glass obtained by laminating layers and integrally firing under pressure is known (for example, see Patent Document 2).

Furthermore, in order to solve the problem of frost damage when the above laminated foam glass is used in a cold region, that is, the problem that the glass breaks around the foamed material in the glass when left at a low temperature, the pre-foamed glass foam particles are surrounded by clay. In addition, a lightweight fired body (for example, see Patent Document 3) that is coated with a coating material made of glass and then dried by pressure-dry molding (see Patent Document 3) or foam glass using glass powder as a raw material, water glass as a crystallization inhibitor A frost-resistant lightweight heat-insulating building material (for example, see Patent Document 4) to which a silicate-based calcium-based material (ALC or the like) as a frost damage inhibitor is added is known.
Japanese Patent Publication No. 61-002618 Japanese Patent Publication No. 6-099160 Japanese Patent Laid-Open No. 11-79866 JP 2002-179476 A

However, the lightweight fired body described in Patent Document 3 needs to be treated at a relatively high firing temperature of 800 to 1000 ° C., and the problem of frost damage still occurs.

Moreover, although the frost damage light weight heat-insulating building material of patent document 4 does not produce a frost damage problem, since it is a foam glass with a bulk specific gravity of about 0.2, a bulk specific gravity of about 1.0 to 2.0 is required to ensure strength. There is a problem that it cannot be used as glass for walls and flooring.

  An object of the present invention is to provide a lightweight glass building material having excellent frost damage resistance.

To achieve the above object, lightweight glass building material according to claim 1, wherein the glass powder, the granule of lightweight material as a raw material, a lightweight glass building material ALC powder is added, the weight The granulated product of the chemical material contains 70% by mass or more of particles having a particle size of 500 μm to 74 μm, the ALC powder is blended in raw materials other than the granulated product of the lightening material, and the ALC powder is 500 μm to 70 mass% or more of 74 μm particle size is contained, 30 mass% or less of 74 μm or less particle size is contained, and 2 to 10 mass% is blended with respect to the total weight of all the blended raw materials of the lightweight glass building material. It is characterized by.

The lightweight glass building material according to claim 2 is characterized in that, in the lightweight glass building material according to claim 1 , the ALC powder is further blended in a granulated body of the lightweight material.

Those lightweight glass building material according to claim 3, wherein, in the lightweight glass building material according to claim 2, granules of the lightweight material, the water glass is added to the powder consisting of carbonate, fine glass powder, and ALC powder And the said ALC powder is mix | blended 0.2-12 mass% with respect to the total weight of the granulated body of the said lightening material, It is characterized by the above-mentioned.

The lightweight glass building material according to claim 4 is the lightweight glass building material according to any one of claims 1 to 3 , wherein the granulated body of the lightening material has a total weight of all the blended raw materials of the lightweight glass building material. In contrast, 1 to 20% by mass is blended.

The lightweight glass building material according to claim 5 is characterized in that, in the lightweight glass building material according to any one of claims 1 to 4 , a building waste material ALC or an ALC production loss product is used as a raw material.

The lightweight glass building material according to claim 6 is the lightweight glass building material according to any one of claims 1 to 5 , wherein the firing temperature of the lightweight glass building material is 750 to 850 ° C.

The lightweight glass building material according to claim 1 is a lightweight glass building material made from a granulated material of glass powder and a lightening material, and because ALC powder is added, the lightweight glass is excellent in frost resistance. Building materials can be provided. Moreover, since the granulated body of a weight reducing material contains 70 mass% or more of things with a particle size of 500 micrometers-74 micrometers, it can improve frost damage resistance and the foamability at the time of baking. Furthermore, since ALC powder is mix | blended in raw materials other than the granulated body of a weight reducing material, the lightweight glass building material which exhibits frost-proofing resistance reliably can be provided. Furthermore, since the ALC powder contains 70% by mass or more of particles having a particle size of 500 μm to 74 μm and 30% by mass or less of particles having a particle size of 74 μm or less, it is possible to prevent the foamability during firing from being inhibited. And since 2 mass% or more is mix | blended with respect to the total weight of all the mixing | blending raw materials of a lightweight glass building material, since the obtained lightweight glass building material has frost damage resistance and 10 mass% or less is mix | blended, The weight can be reduced without suppressing the foaming property, and the water absorption can be suppressed.

According to the lightweight glass building material of Claim 2 , since ALC powder is further mix | blended in the granulated body of a lightening material, the lightweight glass building material which has the more excellent frost damage resistance can be provided.

According to the lightweight glass building material according to claim 3, the granulated body of the lightening material is obtained by adding water glass to a powder composed of carbonate, glass fine powder, and ALC powder. Since it is blended in an amount of 0.2% by mass or more with respect to the total weight of the granulated light-weighting material, it is possible to provide a lightweight glass building material having an excellent frost damage resistance, and it is blended in an amount of 12% by mass or less. Therefore, the weight can be reduced without suppressing the foamability during firing, and the water absorption can be suppressed.

According to the lightweight glass building material of Claim 4, since the granulated body of a lightening material is mix | blended 1 mass% or more with respect to the total weight of all the mixing raw materials of a lightweight glass building material, it is enough by foaming at the time of baking. It can be reduced in weight, and since it is blended in an amount of 20% by mass or less, excessive foaming can be prevented, and the obtained lightweight glass building material can be given sufficient strength to be used for inner and outer wall materials. And water absorption can be suppressed.

According to the lightweight glass building material of Claim 6, since the firing temperature of a lightweight glass building material is 750-850 degreeC, a lightweight glass building material can be provided reliably by low-temperature baking.

As a result of earnest research to achieve the above object, the present inventor is a lightweight glass building material made from a granulated body of glass powder and lightweight material, and when ALC powder is added, frost resistance It has been found that a lightweight glass building material excellent in properties can be provided.

Moreover, this inventor discovered that the granulated body of a weight reduction material can improve frost damage resistance and the foamability at the time of baking, when the thing of a particle size of 500 micrometers-74 micrometers contains 70 mass% or more.

  The present invention has been made based on the above findings.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flowchart showing a procedure for manufacturing a lightweight glass building material according to an embodiment of the present invention.

In FIG. 1, first, waste glass is prepared (step S1). This prepared waste glass is flat glass (float glass, template glass, netted glass, Low-E glass, mirror, etc.)
Soda-lime glass such as bottle glass (including colored glass) and fluorescent lamp glass may be used. Moreover, some impurities, such as a building demolition waste glass, a city distribution waste glass, and a factory circulation cullet, may be included.

Next, a glass piece is created from a part of the waste glass prepared in step S1 using a hammer crusher (step S2), and impurities are removed from the crushed waste glass material (glass powder). The particle size is adjusted to obtain coarse powder G (step S3). Here, the particle size adjustment is
According to the classifier, 3350 μm to 165 μm in the glass raw material is 70 to 50% by mass, 165 μm.
The following is performed so that it may become 30-50 mass% (100 mass% glass in total). this is,
This is to prevent moldability (sag) and fire cracks.

A raw material X is prepared by adding autoclave lightweight concrete (hereinafter referred to as “ALC”) powder to the coarse powder G obtained in step S3 (step S4). The ALC powder in the raw material X is
It is preferable that the particle size is adjusted to include 70% by mass or more of particles having a particle size of 500 μm to 74 μm and 30% by mass or less of particles having a particle size of 74 μm or less. 500 μm to 74 μm
This is because the light-weight glass building material obtained has a frost damage resistance of 70% by mass or less when the particle size of m is 70% by mass or less. It becomes a cause of inhibition.

Further, the blending amount m of the ALC powder in the raw material X is 2 to 10% by weight, preferably 3 to 5% by weight based on the total weight of all the blended raw materials of the obtained lightweight glass building material. preferable. In the case of less than 2% by mass, the resulting lightweight glass building material does not have frost resistance,
If it exceeds 0% by mass, the foaming property during firing is suppressed, the weight cannot be reduced, and the water absorption is too large. The raw material of this ALC powder may contain some impurities. For example, building waste ALC or ALC production loss product may be used as the raw material.

In addition, mortar powder or wollastonite (CaO · SiO ₂ ) or the like may be used instead of ALC powder. However, when ALC powder is blended, it is possible to obtain a light-weight glass building material with the highest frost resistance. it can.

On the other hand, a glass piece is prepared from a part of the waste glass collected in step S1 using a horizontal roller crusher (step S5), and dolomite as a foaming agent and ethyl alcohol as a grinding aid are added to the ball mill. Or 50% by mass of particle size of 10μm or less by vibration mill
After pulverizing to include the above (step S6), ALC powder having the above particle size (particle size of 500 μm to 74 μm is 70% by mass or more) is added and mixed (step S7). Use granule raw material.

The granulated body of the lightening material is produced by the same method as that for producing the foam glass raw material. Specifically, first, a dolomite (MgCO ₃ · CaCO ₃ ) dry fine powder is prepared as a carbonate which is a foaming material, and after adding a glass piece to this, it is pulverized by adding ethyl alcohol as a grinding aid, A predetermined amount of ALC powder is added to the fine powder (glass + dolomite) obtained, and lightly mixed with a mixer (such as a cement mixer) so that it is not further pulverized (to prevent ALC from becoming fine powder). A raw material Y is obtained by adding water glass serving as a binder and a crystallization inhibitor in the granulated body. The ALC powder in the raw material Y preferably has a particle size adjusted so as to contain 70% by mass or more of particles having a particle size of 500 μm to 74 μm and 30% by mass or less of particles having a particle size of 74 μm or less. This is because when the amount of coarse particles of 500 μm or more is included, the resulting lightweight glass building material does not have frost damage resistance. Because.

Moreover, the compounding amount n of the ALC powder in the raw material Y is 0.2-12 mass% with respect to the total weight of the raw material Y, Preferably, it is preferable that 2-5 mass% is mix | blended. When the amount exceeds 12% by mass, the foaming property during firing is suppressed, the weight cannot be reduced, and the water absorption is too large.
On the other hand, not only the ALC powder is blended in the raw material X but also 0.2% by mass or more in the raw material Y
This is because when the LC powder is blended, a lightweight glass building material having better frost resistance can be obtained. The raw material of this ALC powder may contain some impurities. For example, building waste ALC or ALC production loss product may be used as the raw material.

In addition, mortar powder or wollastonite (CaO · SiO ₂ ) or the like may be used instead of ALC powder. However, when ALC powder is blended, it is possible to obtain a light-weight glass building material with the highest frost resistance. it can.

The raw material Y is granulated, and the obtained granulated body is dried and then pulverized and sieved to create a granulated body of a lightening material (step S8) . Here, the obtained granulated body preferably contains 70% by mass or more of particles having a particle size of 500 μm to 74 μm. If the proportion of particles having a particle size of more than 500 μm is large, the resulting lightweight glass building material inhibits the frost damage resistance and is too conspicuous in design. If the proportion of particles having a particle size of less than 74 μm is large, foaming properties during firing Because it gets worse.

Then, from the granules of lightweight material created with raw material X and step S 8 prepared in step S4, to create a material lightweight Glass & (step S 9). The basic composition of the lightweight glass building material produced here is G · Am · [g · D · An] p (G: coarse powder of glass in raw material X, A: ALC powder, g: raw material Y Fine powder of glass, D: Dolomite, [g, D, An]: Granulated body of lightening material, m: Compounding amount with respect to total weight of all blended raw materials, n: Compounding amount with respect to total weight of raw material Y, p: Total The blending amount with respect to the total weight of the blended raw materials).

The blending amount p of the granulated body of the lightening material is preferably 1 to 20% by mass, preferably 3 to 12% by mass, based on the total weight of all the blended raw materials of the obtained lightweight glass building material. . If less than 1% by mass is blended, foaming during firing is insufficient and sufficient weight reduction cannot be achieved. If more than 20% by mass is blended, foaming is excessive and the bulk specific gravity is less than 1. , Can not give sufficient strength to use the resulting lightweight glass building materials for inner and outer wall materials,
Moreover, it is because water absorption is too large.

The particle size range of the entire raw material of this lightweight glass building material is 3 to 20% by mass of 10 μm or less,
Preferably it is contained in the range of 5-10 mass%. 3 having a particle size of 10 μm or less
When the content is 5% by mass or more, preferably 5% by mass or more, the lightweight glass building material obtained by firing in step S11 described later can easily maintain the shape of the molded body, and is 20% by mass or less, preferably 10% by mass or less. This is because the occurrence of transport cracks and sintering shrinkage cracks can be kept low. Further, although there is no particular condition on the particle size on the coarse particle side, the particle size is preferably 5 mm or less for ease of molding. However, more glass cullet can be arranged for design consideration. 30 to the total weight of all blended raw materials for this lightweight glass building material
More than mass%, preferably 50 mass% is blended. This is because the basic performance (strength, hardness, stain resistance, etc.) as a building material (internal / external wall material / floor material) cannot be satisfied when less than 30% by mass is blended.

Thereafter, press molding the material lightweight Glass & created in step S 9 (Step S 10). By press molding, it is possible to prevent the material mixture from losing its shape when it is demolded.

The molded raw material (molded body) is foamed by firing to produce a lightweight glass building material (step S11), and this process is terminated. The firing time in step S11 is about 30 minutes, and the firing temperature is about 750 ° C. to 850 ° C., preferably 760 ° C. to 820 ° C. 75
If the temperature is lower than 0 ° C, the foaming is insufficient and the weight is insufficient, the color is insufficient and the color tone is dull.
This is because the surface is not smooth due to insufficient softening of the glass. On the other hand, when the temperature is higher than 850 ° C., the foaming is excessive and the frost damage resistance is deteriorated. Also, the firing size and shape are abnormal, and further, the heat-resistant metal constituting the shelf board, frame, mesh belt, etc. in the firing furnace. This is because the durability is lowered and the life of the furnace is shortened. However, if the addition amount of the weight reducing material is increased, sufficient foaming can be achieved even when firing at a lower temperature.

After adding the dolomite dry fine powder to the glass piece (cullet) by the treatment of FIG. 1, adding water glass to the finely pulverized raw material Y added as ethyl alcohol as a pulverization aid, granulated, dried and then pulverized Then, a lightweight glass building material is prepared from the granulated body (step S 8 ) of the lightweight material prepared by sieving and the raw material X (step S 4 ) obtained by adding ALC powder to the coarse powder G (step S). 9 ) When this raw material molded body is fired at a low temperature of about 750 ° C. to 850 ° C. (step S11), a lightweight glass building material having excellent frost damage resistance can be produced.

  The mechanism of the frost damage resistance of the lightweight glass building material produced by the above treatment will be described.

Here, the frost damage resistance of building materials refers to the resistance to destruction caused by freezing and thawing, where the surface of building materials becomes tattered and becomes sherbet-like when placed in a cold region, or the building material surface cracks and cracks. An indicator.

In general, the higher the water absorption rate of building materials, the more water is absorbed in the building materials. Therefore, the force that compresses the building materials when the absorbed water is solidified increases, and breakage due to freezing and thawing is likely to occur. Yes. However, as described above, the lightweight glass building material is more excellent in frost damage resistance when ALC powder that slightly increases the water absorption rate of the lightweight glass building material is added to the raw material of the lightweight glass building material.

Then, when the surface of the lightweight glass building material in which ALC powder was contained in the raw material was magnified and observed with an electron microscope, it was found that a minute hole was formed in a part of the wall surface of the pore. On the other hand, when the surface of the lightweight glass building material in which the ALC powder is not included in the raw material is enlarged and observed with a microscope,
It was found that there were almost no holes in the pore walls.

From this result, even if it is a lightweight glass building material with a low water absorption rate because ALC powder is not included in the raw material, when the inverted Ω type pores with small openings are formed on the surface, the adsorbed water on the surface is the pores. When it enters and becomes ice, the ice in the pores does not escape, and it is thought that it is likely to break due to freezing and thawing because it presses the lightweight glass building material as its volume increases.

On the other hand, even if it is a lightweight glass building material having a high water absorption rate because ALC powder is included in the raw material, if the water adsorbed on the pores on the surface of the lightweight glass building material becomes ice, the amount of the increased volume is the pores. It is considered that it is hard to break due to freezing and thawing because it enters the hole formed in the wall surface of.

In addition, since the main use of the lightweight glass building material which concerns on embodiment of this invention is the interior / exterior wall material of a building, a flooring, etc., it can also be set as the glass shown below from a design viewpoint.

(1) Colored glass by addition of inorganic pigment (2) Glass whose surface layer is patterned by the combination of (1) above (3) Glass in which coarse particles of glass and other materials are blended in the surface layer (4) Surface depending on mold Pressed relief glass

  Next, examples of the present invention will be described.

First, after removing the window glass together with the sash from the building demolition site and separating the window glass and the sash, a part of the window glass is crushed using a horizontal roller crusher to create a glass piece.

Further, the building waste material ALC was previously crushed with a hammer, the rebar was removed, and the roll crusher crushed was pulverized with a ball mill.

Then, prepare dolomite (MgCO ₃ · CaCO ₃ ) as carbonate, which is a foam material,
This is pulverized using a wet ball mill to obtain a dolomite dry fine powder. Next, after adding a glass piece to the dolomite dry fine powder, finely pulverizing the ALC powder to a particle size of 10 μm or less over 50 hours by a ball mill to which ethyl alcohol was added as a pulverization aid so as to contain 50% by mass or more. Water glass mixed and mixed with water glass (No. 3 in accordance with Japanese Industrial Standard (JIS) K1408) serving as a binder and crystallization inhibitor in the granulated body so that the powder ratio is 17% by mass. A raw material Y is obtained by adding 34% of an aqueous solution. Here, the blending amount of the dolomite dry fine powder is 5 mass% with respect to the total weight of the raw material Y, and the blending amount n of the ALC powder is the raw material Y
It mix | blends in the ratio shown in Table 1 with respect to the total weight of.

Next, the raw material Y is granulated using a bread granulator having a diameter of 500 mm. The water glass is added while spraying during the granulation. The obtained granulated body is dried, pulverized using a vertical roll crusher, and sieved to prepare a granulated body of a weight reducing material having a particle size shown in Table 1. Here, the particle size shown in Table 1 indicates the working particle size (roughness of the screen), and the actual particle size distribution shown in Table 2 is created.

On the other hand, the remainder of the window glass is crushed using a hammer crusher, impurities are removed from the crushed glass piece, and the coarse particle G is obtained by adjusting the particle size of the glass piece to a maximum particle size of 3350 μm or less. The same ALC powder as that contained in the raw material Y is added to the coarse powder G to prepare the raw material X. The blending amount m of the ALC powder in the raw material X is blended in the ratio shown in Table 1 with respect to the total weight of all blended raw materials of the obtained lightweight glass building material.

Next, the raw material X and the granulated material of the lightening material are lightly mixed with a mixer, and the mixed material is placed in a molding die set on a shelf board (1100 mm × 1400 mm) made of mullite cordierite. Fill by spraying. The shelf board is pre-coated with a release agent such as fine powdery alumina. The mold is, for example, a section of 203 mm with an iron plate with a thickness of 1.5 mm
It is partitioned to be corners. 0.2 kg / c from the top after leveling the raw material filled in the mold
It was press-molded at a pressure of about m ² so that there were no filling irregularities or voids.

The molded raw material (molded body) was demolded, and then conveyed into a roller hearth furnace (firing furnace) for firing. As firing conditions, the temperature is raised at 16 ° C. per minute, maintained at a maximum firing temperature of 800 ° C. for about 30 minutes, and then lowered (removed) at 8 ° C. per minute.

After the obtained fired body was cut, a test specimen for evaluation was obtained, and the bending strength, normal water absorption rate, freeze-thaw property (freezing damage resistance) were examined by the following methods, and the results are shown in Table 1.
<Bending strength> Using a Shimadzu autograph, load speed (crosshead speed) 2 mm /
min.
<Normal water absorption> The specimen was immersed in a water depth of 300 mm for 48 hours, and the change in weight was measured.
<Freeze-thaw property> According to JIS A 5422 7.9 thawing in the frozen water in the air using a Marui freezing and thawing tester, after immersing the specimen 100 × 200 mm in clean water for 48 hours, it is placed in the tank of the test apparatus. Install and freeze for 2 hours in the air at -20 ° C ± 3 ° C.
5 minutes), and one cycle 3 hours test of melting in water at + 20 ° C. ± 3 ° C. for 1 hour. Observed occasionally, the number of cycles to failure was recorded and stopped at 600 cycles.

In Table 1, in the evaluation of the freeze-thaw resistance test, the sample stopped at less than 300 cycles is defective, the sample stopped at 300 cycles or more to less than 600 cycles is good, the sample stopped at 600 cycles or more is passed, Samples were designated as Comparative Examples 1 to 11, and good or acceptable samples were designated as Examples 1 to 12 and Reference Examples .

Moreover, the density and bending strength of the sintered body obtained by firing were measured, and the results are shown in Table 1.
Examples 1-2, Reference Example and Comparative Examples 1-11 are all good foams having a bulk density in the range of 1.0-2.0, and all have a bending strength of 1 MP or more. The point was good.

  Next, the results shown in Table 1 were obtained for the freeze-thaw resistance test.

Specifically, a certain amount of ALC powder is blended in the raw material X is a necessary condition for the lightweight glass building material to have frost damage resistance, and the blended amount m of the ALC powder in the raw material X is the lightweight glass obtained. When it is 3 mass% or 5 mass% with respect to the total weight of all the compounding raw materials of building materials (Example 1-
8) It was found that when the lightweight glass building material has frost damage resistance and is 0% by mass or 1% by mass (Comparative Examples 1 to 8), it has no frost damage resistance. Moreover, although not described in Table 1, when the blending amount m of the ALC powder in the raw material X is less than 2% by mass with respect to the total weight of all the blended raw materials of the obtained lightweight glass building material, the resulting lightweight glass is obtained. It was found that building materials have no frost resistance. Moreover, when exceeding 10 mass%, it turned out that the foamability at the time of baking is suppressed, weight reduction cannot be performed, and water absorption is too large.

That is, it is obtained when the blending amount m of the ALC powder in the raw material X is 2 to 10% by weight, preferably 3 to 5% by weight, based on the total weight of all the blended raw materials of the obtained lightweight glass building material. It was found that lightweight glass building materials have frost resistance.

However, even when a certain amount of ALC powder is blended in the raw material X, when the working particle size of the granulated material of the lightening material is 125 μm (from Table 2, the particle size of 500 μm to 74 μm: about 15% by mass), the resulting lightweight glass & (Comparative example 9-11) whereas has no frost resistance, work particle size 260μm granulation of lighter material (from Table 2, the particle size of 500Myuemu～74myuemu: about 66 wt%) or (from Table 2, 500Myuemu～74myuemu particle size: about 79 wt%) working particle size of granules of lightweight material 500μm~12 5μ m case, the resulting light glass & (example 1-12) is frost Have sex. That is, in addition to the fact that a certain amount of ALC powder is mixed in the raw material X, the lightweight glass building material reliably has frost damage resistance when the granulated body of the lightweight material has a particle size of more than 500 μm to 74 μm of 70% by mass. I understood it.

Furthermore, even if it is a light-weight glass building material having a frost damage resistance by mixing a certain amount of ALC powder with the raw material X, the raw material Y is not mixed with the raw material Y (Examples 1 and 5). Also, when a certain amount of ALC powder is blended (Examples 2 to 4, 6 to 8), the frost damage resistance is superior. That is, when a certain amount of ALC powder is blended not only in the raw material X but also in the raw material Y, specifically, the blending amount n of the ALC powder in the raw material Y is 2 to 2 with respect to the total weight of the raw material Y. When it was 6 mass%, it turned out that the frost damage resistance of a lightweight glass building material becomes a more excellent thing.
Moreover, although not described in Table 1, if the blending amount n of the ALC powder in the raw material Y is blended at least 0.2% by mass or more with respect to the total weight of the raw material Y, the above-mentioned frost resistance can be achieved. It has been found that it can be made better. Moreover, when it exceeded 12 mass% with respect to the total weight of the raw material Y, it turned out that the foamability at the time of baking is suppressed, weight reduction cannot be performed, and water absorption is too large.

Moreover, even when a certain amount of ALC powder is blended not only in the raw material X but also in the raw material Y, when the working particle size of the granulated material of the lightening material is 125 μm, the frost damage resistance of the lightweight glass building material Was found to be halved ( Reference Example , Comparative Examples 9 to 11).

  Next, the results shown in Table 1 were obtained for the normal water absorption.

In general, the normal water absorption rate that is desirable for lightweight glass building materials to be resistant to frost damage is 1-2.
Among the samples that were good or better in the freeze-thaw resistance test, only the two samples of Examples 3 and 4 had normal water absorption in this range, and the samples of the remaining examples were It did not have a range of normal water absorption. On the other hand, even if it was poor in the freeze-thaw resistance test,
As shown in Comparative Example 9, there was a sample satisfying this range of normal water absorption.

From the above results, it is considered that the normal water absorption rate does not affect the frost damage resistance of lightweight glass building materials.

It is a flowchart which shows the procedure of the lightweight glass building material manufacturing process which concerns on embodiment of this invention.

Claims (6)

Glass powder, and a granule of lightweight material as a raw material, a lightweight glass building material ALC powder is added, the granules of the lightweight material, 70 mass those granularity 500μm~74μm The ALC powder is blended in raw materials other than the granulated body of the lightening material, and the ALC powder contains 70% by mass or more of particles having a particle size of 500 μm to 74 μm and has a particle size of 74 μm or less. Is contained in an amount of 2 to 10 mass% with respect to the total weight of all the blended raw materials of the lightweight glass building material. The lightweight glass building material according to claim 1, wherein the ALC powder is further blended in a granulated body of the lightening material. The granulated body of the lightening material is obtained by adding water glass to a powder comprising carbonate, glass fine powder, and ALC powder, and the ALC powder is a total weight of the granulated body of the lightening material. The lightweight glass building material according to claim 2, wherein 0.2 to 12% by mass is blended with respect to the glass. The granulated body of the lightening material is blended in an amount of 1 to 20 mass% with respect to the total weight of all blended raw materials of the lightweight glass building material. Lightweight glass building material. The lightweight glass building material according to any one of claims 1 to 4, wherein the ALC powder uses a building waste material ALC or an ALC production loss product as a raw material. The lightweight glass building material according to any one of claims 1 to 5, wherein a firing temperature of the lightweight glass building material is 750 to 850 ° C.