WO2011052048A1 - Gypsum board - Google Patents
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- WO2011052048A1 WO2011052048A1 PCT/JP2009/068465 JP2009068465W WO2011052048A1 WO 2011052048 A1 WO2011052048 A1 WO 2011052048A1 JP 2009068465 W JP2009068465 W JP 2009068465W WO 2011052048 A1 WO2011052048 A1 WO 2011052048A1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like materials
Definitions
- the present invention relates to a gypsum board. More specifically, even when gypsum having a high content of water-soluble salts corresponding to impurities is used for preparing a slurry to be cured, the occurrence of bending can be sufficiently prevented. Related to gypsum board.
- a gypsum board is generally loaded with a gypsum-containing slurry between a lower base paper that also serves as a formwork and an upper back base paper, and is continuously conveyed in this state while the slurry is cured and hardened in the meantime. Manufactured by cutting the body.
- the gypsum-containing slurry is prepared by mixing various admixtures, chemicals, and required amounts of water in addition to calcined gypsum (half-water gypsum) obtained by firing raw gypsum.
- various chemical gypsum such as phosphate gypsum, flue gas desulfurization gypsum, titanium gypsum (gypsum produced as a by-product in the production of titanium oxide), hydrofluoric acid gypsum (produced as a by-product in the production of hydrofluoric acid) Used), salt gypsum, refined gypsum and the like.
- the gypsum board produced by such a conventional production method has a problem that when it absorbs moisture and the water content becomes high, the gypsum board tends to bend, and among them, the content of water-soluble salts corresponding to impurities is high as a raw material gypsum. There is a problem that the resulting gypsum board is greatly bent.
- Patent Document 1 As a gypsum board that prevents the occurrence of bending, an example in which a crystal modifier such as copper sulfate is used in combination in a slurry to be cured (for example, see Patent Document 1), and an example in which an aggregated phosphate is used in combination (for example, Patent Document) 2) is known.
- Patent Document 1 has a problem that the occurrence of bending cannot be sufficiently prevented, and the conventional example such as Patent Document 2 is expensive and causes environmental pollution. There is a problem that there is also a fear of becoming.
- Patent Document 3 Another example of a gypsum board imparted with fire resistance and water resistance is also known in which cement is used in combination with a slurry to be cured (for example, see Patent Document 3).
- a conventional example such as Patent Document 3 uses a large amount of cement, specifically about 20 to 40% cement, together with gypsum.
- this conventional example has a problem that the strength of the gypsum board obtained, for example, the compressive strength is low, the slurry takes a long time to cure, and the pH is extremely high.
- the problem to be solved by the present invention is that even when gypsum having a high content of water-soluble salts corresponding to impurities is used as a raw material, the occurrence of bending can be sufficiently prevented, and the compressive strength can be prevented.
- the present invention provides a gypsum board that does not cause problems in curing time, pH, and the like.
- the present invention which solves the above-mentioned problems is a gypsum board in which a mold is charged with a gypsum-containing slurry and cured, and 0.2 to 5.0 parts by mass of cement per 100 parts by mass of calcined gypsum obtained by firing gypsum.
- the gypsum board is obtained by curing a slurry used at a ratio of
- the gypsum board according to the present invention uses 0.2 to 5.0 parts by mass of cement per 100 parts by mass of calcined gypsum (semihydrate gypsum) obtained by firing gypsum, and requires various admixtures and chemicals.
- the slurry is prepared by mixing them with water as appropriate, and the slurry is loaded between a form frame, for example, a front base paper also serving as a mold and a back base paper, and cured.
- gypsum board in addition to natural gypsum, various chemical gypsum, such as phosphate gypsum, flue gas desulfurization gypsum, titanium gypsum, hydrofluoric gypsum, salt gypsum, refined gypsum, etc. Can do.
- the content (concentration) of water-soluble salts corresponding to the impurities in the gypsum used for preparing the slurry varies depending on the type and amount of chemical gypsum used and the properties at that time.
- Portland cement is preferable, and ordinary Portland cement is more preferable.
- pulp, glass fiber, vermiculite and the like can be appropriately used as the admixture, and curing accelerators, curing retarders, water reducing agents and the like can be appropriately used as the chemicals.
- the gypsum board according to the present invention is obtained by curing a slurry using 0.2 to 5.0 parts by mass of cement per 100 parts by mass of calcined gypsum obtained by firing gypsum, It is characterized in that the amount of cement used for calcined gypsum is significantly lower than conventional gypsum boards that use cement for the preparation of the slurry. The reason is that if the use ratio of cement is less than 0.2 parts by mass per 100 parts by mass of calcined gypsum, it will not be possible to sufficiently prevent the resulting gypsum board from being bent. Further, when the proportion of the cement used exceeds 5.0 parts by mass, the compressive strength of the resulting gypsum board decreases, the time required for curing increases, and the pH increases remarkably.
- gypsum board made by hardening slurry using cement together with calcined gypsum the compressive strength is higher than when cement is not used, and the time required for hardening is relatively short, and the pH is also kept to a level where there is no problem.
- the cement is used at a ratio of 0.5 to 1.0 parts by mass, more preferably at a ratio of 0.5 parts by weight.
- the gypsum board according to the present invention can sufficiently prevent the occurrence of bending as compared with the conventional gypsum board as described above, and does not cause problems in compressive strength, curing time, pH and the like.
- the manifestation of this effect is significant when the calcined gypsum used for the preparation of the slurry is a calcined gypsum having a high content of water-soluble salts corresponding to impurities.
- the expression of the effect of the present invention as described above is that calcined gypsum used for the preparation of the slurry has a total content of water-soluble potassium salt, sodium salt and magnesium salt of those oxides (K 2 O, Na 2 O and MgO) in terms of 500 g / kg or more of gypsum, for example 500 to 2500 mg / kg of gypsum, which is remarkable when used as a raw material, and in particular, the total content of water-soluble potassium, sodium and magnesium salts Is particularly prominent when the oxide is 600 mg / kg or more in terms of oxides, for example, 600 to 2500 mg / kg.
- cured material obtained.
- Test category 1 Comparative Example 1 A flue gas desulfurization gypsum having a total content of water-soluble potassium salt, sodium salt and magnesium salt in terms of oxides of 632 mg / kg (hereinafter simply referred to as water-soluble salt content 632 mg / kg) is calcined, and calcined gypsum (Hemihydrate gypsum). A slurry was prepared by mixing 200 parts by mass of this calcined gypsum with 170 parts by mass of water. This slurry was loaded into a mold and cured, then demolded and dried at 40 ° C. until a constant weight was obtained to obtain a 12.5 mm ⁇ 900 mm ⁇ 1820 mm gypsum board.
- a test piece of 12.5 mm x 150 mm x 650 mm was cut out from this gypsum board, and this test piece was supported at two points with a span of 600 mm under the condition of 40 ° C x 90% RH.
- the bending at the center of the span was measured with a measuring instrument (a Digimatic indicator, trade name, manufactured by Mitutoyo Corporation). The results are summarized in Table 1.
- Comparative Examples 2-4 Instead of 170 parts by mass of water, a slurry was prepared in the same manner as in Comparative Example 1 except that 170 parts by mass of an aqueous solution in which copper sulfate pentahydrate was added in the amount shown in Table 1 was used. After obtaining the gypsum board, the test piece was cut out and the deflection was measured. The results are summarized in Table 1.
- Comparative Examples 5-7 In place of 170 parts by mass of water, a slurry was prepared in the same manner as in Comparative Example 1 except that 170 parts by mass of an aqueous solution in which an amount of sodium trimetaphosphate as shown in Table 1 was added was used. After obtaining, the test piece was cut out and the deflection was measured. The results are summarized in Table 1.
- Comparative Examples 8-11 and Examples 1-7 In place of 200 parts by mass of calcined gypsum, a slurry was prepared in the same manner as in Comparative Example 1 except that 200 parts by mass of calcined gypsum mixed with ordinary Portland cement in the amount shown in Table 1 was used. After obtaining the gypsum board, the test piece was cut out and the deflection was measured. The results are summarized in Table 1.
- Test category 2 Comparative Example 12 A flue gas desulfurization gypsum having a water-soluble salt content of 632 mg / kg was calcined to obtain calcined gypsum (half water gypsum). A slurry was prepared by mixing 375 g of water with 500 g of this calcined gypsum. This slurry was loaded into a 50 mm ⁇ 50 mm ⁇ 50 mm mold and cured, then demolded and dried at 40 ° C. until a constant weight was obtained, to obtain a cured product.
- the cured body was subjected to autograph (manufactured by Shimadzu Corporation, trade name, model number AG-10TE), loaded at a load speed of 1 mm / min, and the load value when the cured body was buckled was determined as the compressive strength (N / mm 2 ).
- the results are shown in Table 2 and FIG.
- the compressive strength is about the same or higher, but if the added mass part of ordinary Portland cement is larger than that, for example, 10.0 or more, the compressive strength does not add ordinary Portland cement. It becomes lower than the case (Comparative Example 12). Also in terms of compressive strength, the added part by mass of ordinary Portland cement per 100 parts by mass of calcined gypsum is preferably 0.3 to 2.0.
- Test category 3 Comparative Example 16 A flue gas desulfurization gypsum having a water-soluble salt content of 632 mg / kg was calcined to obtain calcined gypsum (half water gypsum). A slurry was prepared using this calcined gypsum, and the curing time (the amount of completion) was measured using this slurry in accordance with JIS-R9112. Further, the pH of the obtained cured product was measured according to JIS-R9101. The results are summarized in Table 3.
- Example 15 and Comparative Examples 17-19 instead of calcined gypsum, a slurry was prepared in the same manner as in Comparative Example 16 except that a mixture of calcined gypsum mixed with ordinary Portland cement in an amount corresponding to the addition amount shown in Table 1 was used to obtain a cured product. The curing time (minute of completion) and pH were measured. The results are summarized in Table 3.
- Test category 4 Comparative Example 20 A mixture of natural gypsum having a water-soluble salt content of 227 mg / kg and flue gas desulfurization gypsum was calcined to obtain calcined gypsum (half water gypsum). Using this calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 1 of Test Category 1 below, and then a test piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
- Comparative Examples 21-31 The source (kind) and mixing ratio of the flue gas desulfurization gypsum were changed, and the gypsum having the water-soluble salt content shown in Table 4 was baked to obtain calcined gypsum (half-water gypsum). Using these calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 20 below. Then, a test piece was cut out and the deflection after 48 hours was measured. The results are summarized in Table 4 and FIG.
- Example 16 instead of calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 27 except that a mixture of ordinary Portland cements in the amount shown in Table 4 was used. A piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
- Example 17 instead of calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 30, except that a mixture of ordinary Portland cements in the amount shown in Table 4 was used. A piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
- Example 18 instead of calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 31 except that a mixture of ordinary Portland cements in the amounts shown in Table 4 was used. A piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
Abstract
Description
比較例1
水可溶性のカリウム塩、ナトリウム塩及びマグネシウム塩の合計含有量がそれらの酸化物換算で632mg/kg(以下、単に水可溶性塩類含有量632mg/kgという)の排煙脱硫石膏を焼成し、焼石膏(半水石膏)とした。この焼石膏200質量部に水を170質量部の割合で混合してスラリーを調製した。このスラリーを型枠に装填し、硬化させた後、脱型して、40℃で恒量になるまで乾燥し、12.5mm×900mm×1820mmの石膏ボードを得た。この石膏ボードから12.5mm×150mm×650mmの試験片を切り出し、この試験片を、40℃×90%RHの条件下にスパン600mmで2点支持し、所定時間経過毎に、試験片に発生したスパン中央の撓みを測定器(ミツトヨ社製のデジマチックインジケータ、商品名)で測定した。結果を表1にまとめて示した。 Test category 1
Comparative Example 1
A flue gas desulfurization gypsum having a total content of water-soluble potassium salt, sodium salt and magnesium salt in terms of oxides of 632 mg / kg (hereinafter simply referred to as water-soluble salt content 632 mg / kg) is calcined, and calcined gypsum (Hemihydrate gypsum). A slurry was prepared by mixing 200 parts by mass of this calcined gypsum with 170 parts by mass of water. This slurry was loaded into a mold and cured, then demolded and dried at 40 ° C. until a constant weight was obtained to obtain a 12.5 mm × 900 mm × 1820 mm gypsum board. A test piece of 12.5 mm x 150 mm x 650 mm was cut out from this gypsum board, and this test piece was supported at two points with a span of 600 mm under the condition of 40 ° C x 90% RH. The bending at the center of the span was measured with a measuring instrument (a Digimatic indicator, trade name, manufactured by Mitutoyo Corporation). The results are summarized in Table 1.
水170質量部に代えて、表1記載の添加量となる量の硫酸銅5水和物を溶解した水溶液170質量部を用いたこと以外は比較例1と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、撓みを測定した。結果を表1にまとめて示した。 Comparative Examples 2-4
Instead of 170 parts by mass of water, a slurry was prepared in the same manner as in Comparative Example 1 except that 170 parts by mass of an aqueous solution in which copper sulfate pentahydrate was added in the amount shown in Table 1 was used. After obtaining the gypsum board, the test piece was cut out and the deflection was measured. The results are summarized in Table 1.
水170質量部に代えて、表1記載の添加量となる量のトリメタリン酸ナトリウムを溶解した水溶液170質量部を用いたこと以外は比較例1と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、撓みを測定した。結果を表1にまとめて示した。 Comparative Examples 5-7
In place of 170 parts by mass of water, a slurry was prepared in the same manner as in Comparative Example 1 except that 170 parts by mass of an aqueous solution in which an amount of sodium trimetaphosphate as shown in Table 1 was added was used. After obtaining, the test piece was cut out and the deflection was measured. The results are summarized in Table 1.
焼石膏200質量部に代えて、焼石膏に表1記載の添加量となる量の普通ポルトランドセメントを混合したもの200質量部を用いたこと以外は比較例1と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、撓みを測定した。結果を表1にまとめて示した。 Comparative Examples 8-11 and Examples 1-7
In place of 200 parts by mass of calcined gypsum, a slurry was prepared in the same manner as in Comparative Example 1 except that 200 parts by mass of calcined gypsum mixed with ordinary Portland cement in the amount shown in Table 1 was used. After obtaining the gypsum board, the test piece was cut out and the deflection was measured. The results are summarized in Table 1.
添加量:焼石膏100質量部当たりの添加材の質量部 In Table 1,
Addition amount: parts by mass of additive per 100 parts by mass of calcined gypsum
比較例12
水可溶性塩類含有量632mg/kgの排煙脱硫石膏を焼成し、焼石膏(半水石膏)とした。この焼石膏500gに水375gを混合してスラリーを調製した。このスラリーを50mm×50mm×50mmの型枠に装填し、硬化させた後、脱型して、40℃で恒量になるまで乾燥し、硬化体を得た。この硬化体を、オートグラフ(島津製作所社製、商品名、型番AG-10TE)に供し、荷重速度1mm/分で荷重して、硬化体が座屈したときの荷重値を圧縮強度(N/mm2)とした。結果を表2及び図1に示した。 Test category 2
Comparative Example 12
A flue gas desulfurization gypsum having a water-soluble salt content of 632 mg / kg was calcined to obtain calcined gypsum (half water gypsum). A slurry was prepared by mixing 375 g of water with 500 g of this calcined gypsum. This slurry was loaded into a 50 mm × 50 mm × 50 mm mold and cured, then demolded and dried at 40 ° C. until a constant weight was obtained, to obtain a cured product. The cured body was subjected to autograph (manufactured by Shimadzu Corporation, trade name, model number AG-10TE), loaded at a load speed of 1 mm / min, and the load value when the cured body was buckled was determined as the compressive strength (N / mm 2 ). The results are shown in Table 2 and FIG.
焼石膏500gに代えて、焼石膏に表1記載の添加量となる量の普通ポルトランドセメントを混合したもの500gを用いたこと以外は比較例12と同様にして、スラリーを調製し、硬化体を得た後、圧縮強度を測定した。結果を表2及び図1に示した。 Examples 8 to 14 and Comparative Examples 13 to 15
In place of 500 g of calcined gypsum, a slurry was prepared in the same manner as in Comparative Example 12 except that 500 g of calcined gypsum mixed with ordinary Portland cement in an amount corresponding to the addition amount shown in Table 1 was used. After obtaining, the compressive strength was measured. The results are shown in Table 2 and FIG.
添加量:焼石膏100質量部当たりの普通ポルトランドセメントの添加質量部 In Table 2,
Amount of addition: part by weight of ordinary Portland cement per 100 parts by weight of calcined gypsum
比較例16
水可溶性塩類含有量632mg/kgの排煙脱硫石膏を焼成し、焼石膏(半水石膏)とした。この焼石膏を用いてスラリーを調製し、このスラリーを用いて、以下JIS-R9112に準拠し、硬化時間(終結の分)を測定した。また得られた硬化体について、以下JIS-R9101に準拠し、pHを測定した。結果を表3にまとめて示した。 Test category 3
Comparative Example 16
A flue gas desulfurization gypsum having a water-soluble salt content of 632 mg / kg was calcined to obtain calcined gypsum (half water gypsum). A slurry was prepared using this calcined gypsum, and the curing time (the amount of completion) was measured using this slurry in accordance with JIS-R9112. Further, the pH of the obtained cured product was measured according to JIS-R9101. The results are summarized in Table 3.
焼石膏に代えて、焼石膏に表1記載の添加量となる量の普通ポルトランドセメントを混合したものを用いたこと以外は比較例16と同様にして、スラリーを調製し、硬化体を得たときの硬化時間(終結の分)とpHを測定した。結果を表3にまとめて示した。 Example 15 and Comparative Examples 17-19
Instead of calcined gypsum, a slurry was prepared in the same manner as in Comparative Example 16 except that a mixture of calcined gypsum mixed with ordinary Portland cement in an amount corresponding to the addition amount shown in Table 1 was used to obtain a cured product. The curing time (minute of completion) and pH were measured. The results are summarized in Table 3.
添加量:焼石膏100質量部当たりの普通ポルトランドセメントの添加質量部 In Table 3,
Amount of addition: part by weight of ordinary Portland cement per 100 parts by weight of calcined gypsum
比較例20
水可溶性塩類含有量227mg/kgの天然石膏と排煙脱硫石膏との混合物を焼成し、焼石膏(半水石膏)とした。この焼石膏を用い、以下試験区分1の比較例1と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、48時間経過後の撓みを測定した。結果を表4及び図2に示した。 Test category 4
Comparative Example 20
A mixture of natural gypsum having a water-soluble salt content of 227 mg / kg and flue gas desulfurization gypsum was calcined to obtain calcined gypsum (half water gypsum). Using this calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 1 of Test Category 1 below, and then a test piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
排煙脱硫石膏の出所(種類)及び混合割合を変えて、表4に記載した水可溶性塩類含有量の石膏を焼成し、焼石膏(半水石膏)とした。これらの焼石膏を用い、以下比較例20と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、48時間経過後の撓みを測定した。結果を表4及び図2にまとめて示した。 Comparative Examples 21-31
The source (kind) and mixing ratio of the flue gas desulfurization gypsum were changed, and the gypsum having the water-soluble salt content shown in Table 4 was baked to obtain calcined gypsum (half-water gypsum). Using these calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 20 below. Then, a test piece was cut out and the deflection after 48 hours was measured. The results are summarized in Table 4 and FIG.
焼石膏に代えて、表4記載の添加量となる量の普通ポルトランドセメントを混合したものを用いたこと以外は比較例27と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、48時間経過後の撓みを測定した。結果を表4及び図2に示した。 Example 16
Instead of calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 27 except that a mixture of ordinary Portland cements in the amount shown in Table 4 was used. A piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
焼石膏に代えて、表4記載の添加量となる量の普通ポルトランドセメントを混合したものを用いたこと以外は比較例30と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、48時間経過後の撓みを測定した。結果を表4及び図2に示した。 Example 17
Instead of calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 30, except that a mixture of ordinary Portland cements in the amount shown in Table 4 was used. A piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
焼石膏に代えて、表4記載の添加量となる量の普通ポルトランドセメントを混合したものを用いたこと以外は比較例31と同様にして、スラリーを調製し、石膏ボードを得た後、試験片を切り出して、48時間経過後の撓みを測定した。結果を表4及び図2に示した。 Example 18
Instead of calcined gypsum, a slurry was prepared and a gypsum board was obtained in the same manner as in Comparative Example 31 except that a mixture of ordinary Portland cements in the amounts shown in Table 4 was used. A piece was cut out and the deflection after 48 hours was measured. The results are shown in Table 4 and FIG.
Claims (4)
- 型枠に石膏含有のスラリーを装填し、硬化して成る石膏ボードにおいて、石膏を焼成した焼石膏100質量部当たりセメントを0.2~5.0質量部の割合で用いたスラリーを硬化して成ることを特徴とする石膏ボード。 In a gypsum board formed by loading a gypsum-containing slurry into a mold and curing, the slurry using 0.2 to 5.0 parts by mass of cement per 100 parts by mass of calcined gypsum obtained by calcining gypsum was cured. Gypsum board characterized by comprising.
- スラリーが、焼石膏100質量部当たりセメントを0.3~2.0質量部の割合で用いたものである請求項1記載の石膏ボード。 The gypsum board according to claim 1, wherein the slurry is a mixture of 0.3 to 2.0 parts by mass of cement per 100 parts by mass of calcined gypsum.
- 石膏が、水可溶性のカリウム塩、ナトリウム塩及びマグネシウム塩の合計含有量がそれらの酸化物換算で500mg/kg以上のものである請求項1又は2記載の石膏ボード。 The gypsum board according to claim 1 or 2, wherein the gypsum has a total content of water-soluble potassium salt, sodium salt and magnesium salt of 500 mg / kg or more in terms of oxides.
- セメントが普通ポルトランドセメントである請求項1~3のいずれか一つの項記載の石膏ボード。 The gypsum board according to any one of claims 1 to 3, wherein the cement is ordinary Portland cement.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011538149A JPWO2011052048A1 (en) | 2009-10-28 | 2009-10-28 | Plasterboard |
CN200980162305XA CN102712535A (en) | 2009-10-28 | 2009-10-28 | Gypsum board |
PCT/JP2009/068465 WO2011052048A1 (en) | 2009-10-28 | 2009-10-28 | Gypsum board |
KR1020117030182A KR20120070543A (en) | 2009-10-28 | 2009-10-28 | Gypsum board |
Applications Claiming Priority (1)
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---|---|---|---|
PCT/JP2009/068465 WO2011052048A1 (en) | 2009-10-28 | 2009-10-28 | Gypsum board |
Publications (1)
Publication Number | Publication Date |
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WO2011052048A1 true WO2011052048A1 (en) | 2011-05-05 |
Family
ID=43921489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/068465 WO2011052048A1 (en) | 2009-10-28 | 2009-10-28 | Gypsum board |
Country Status (4)
Country | Link |
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JP (1) | JPWO2011052048A1 (en) |
KR (1) | KR20120070543A (en) |
CN (1) | CN102712535A (en) |
WO (1) | WO2011052048A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017190262A (en) * | 2016-04-14 | 2017-10-19 | チヨダウーテ株式会社 | Gypsum member, gypsum board and method for producing gypsum member |
CN108290791A (en) * | 2015-11-30 | 2018-07-17 | 可耐福石膏两合公司 | additive for gypsum building material |
CN114349449A (en) * | 2021-11-23 | 2022-04-15 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
US11891336B2 (en) | 2019-11-22 | 2024-02-06 | United States Gypsum Company | Gypsum board containing high absorption paper and related methods |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105328943B (en) * | 2014-08-15 | 2018-08-14 | 北新集团建材股份有限公司 | A kind of plasterboard and its manufacturing method improving energy resource utilization ratio |
WO2020224120A1 (en) * | 2019-05-08 | 2020-11-12 | 北新集团建材股份有限公司 | High impurity ion content desulfurized gypsum paper-faced gypsum board and manufacturing method therefor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11116319A (en) * | 1997-10-07 | 1999-04-27 | Yoshino Gypsum Co Ltd | Gypsum-based building material having suppressed elution of heavy metal and its production |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS582189B2 (en) * | 1979-11-16 | 1983-01-14 | 川崎重工業株式会社 | Method for preventing efflorescence of hardened gypsum |
-
2009
- 2009-10-28 WO PCT/JP2009/068465 patent/WO2011052048A1/en active Application Filing
- 2009-10-28 JP JP2011538149A patent/JPWO2011052048A1/en active Pending
- 2009-10-28 CN CN200980162305XA patent/CN102712535A/en active Pending
- 2009-10-28 KR KR1020117030182A patent/KR20120070543A/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11116319A (en) * | 1997-10-07 | 1999-04-27 | Yoshino Gypsum Co Ltd | Gypsum-based building material having suppressed elution of heavy metal and its production |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108290791A (en) * | 2015-11-30 | 2018-07-17 | 可耐福石膏两合公司 | additive for gypsum building material |
CN108290791B (en) * | 2015-11-30 | 2022-04-01 | 可耐福石膏两合公司 | Additive for gypsum building materials |
JP2017190262A (en) * | 2016-04-14 | 2017-10-19 | チヨダウーテ株式会社 | Gypsum member, gypsum board and method for producing gypsum member |
US11891336B2 (en) | 2019-11-22 | 2024-02-06 | United States Gypsum Company | Gypsum board containing high absorption paper and related methods |
CN114349449A (en) * | 2021-11-23 | 2022-04-15 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
CN102712535A (en) | 2012-10-03 |
JPWO2011052048A1 (en) | 2013-03-14 |
KR20120070543A (en) | 2012-06-29 |
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