JP3290460B2 - Fibrous tricalcium silicate hydrate and method for producing the same - Google Patents
Fibrous tricalcium silicate hydrate and method for producing the sameInfo
- Publication number
- JP3290460B2 JP3290460B2 JP10728892A JP10728892A JP3290460B2 JP 3290460 B2 JP3290460 B2 JP 3290460B2 JP 10728892 A JP10728892 A JP 10728892A JP 10728892 A JP10728892 A JP 10728892A JP 3290460 B2 JP3290460 B2 JP 3290460B2
- Authority
- JP
- Japan
- Prior art keywords
- fibrous
- silicate hydrate
- tricalcium silicate
- hydrothermal reaction
- fiber length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/465—Ca-silicate, e.g. wollastonite
-
- 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
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/12—Absence of mineral fibres, e.g. asbestos
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は繊維状トリカルシウムシ
リケート水和物及びその製造方法に関するもので、特に
繊維長が１mm以上と長いものを安定して提供できるよう
に工夫したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous tricalcium silicate hydrate and a method for producing the same, and in particular, has been devised to stably provide a fiber having a long fiber length of 1 mm or more.
【０００２】[0002]
【従来の技術】従来より、繊維長が長く、不燃性，耐熱
性あるいは補強性を有するアスベスト（石綿）は各種建
材として工業的に多用されている。2. Description of the Related Art Hitherto, asbestos (asbestos) having a long fiber length and having noncombustibility, heat resistance or reinforcing property has been widely used industrially as various building materials.
【０００３】[0003]
【発明が解決しようとする課題】ところで、前述したア
スベストは特に化学的安定性及び強度においても特に優
れた繊維状鉱物であるが、近年発癌性物質であるとさ
れ、環境保全上使用できないという問題がある。そこ
で、近年においてはアスベストに代わるべく繊維長の長
い無公害の繊維が望まれている。The above-mentioned asbestos is a fibrous mineral which is particularly excellent in chemical stability and strength, but is considered to be a carcinogen in recent years and cannot be used for environmental protection. There is. Therefore, in recent years, non-polluting fibers having a long fiber length have been desired to replace asbestos.
【０００４】一方、ケイ酸カルシウム水和物は、安価な
ケイ酸質原料と石灰質原料とを使用して、比較的容易に
合成されることは一般に知られているものの、その繊維
長は0.１〜0.２mm程と極めて短く、各種建材等の工業材
料としては使用不能であった。On the other hand, calcium silicate hydrate is generally known to be relatively easily synthesized using inexpensive siliceous raw materials and calcareous raw materials, but its fiber length is 0.1 mm. It was extremely short, about 1 to 0.2 mm, and could not be used as industrial materials such as various building materials.
【０００５】本発明は上記事情に鑑み、繊維長が１mm以
上と長い繊維状トリカルシウムシリケート水和物を提供
すると共に、極めて安定して製造できる繊維状トリカル
シウムシリケート水和物の製造方法を提供することを目
的とする。In view of the above circumstances, the present invention provides a fibrous tricalcium silicate hydrate having a fiber length as long as 1 mm or more, and a method for producing a fibrous tricalcium silicate hydrate which can be extremely stably produced. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成する本発
明に係る繊維状トリカルシウムシリケート水和物は、Ca
O/SiO2モル比が1.６〜4.０となるように石灰質原料と珪
酸質原料とを混合したものに、MgO 及びアルカリ金属の
水酸化物を添加し、飽和蒸気圧下で水熱反応してなり、
且つ繊維長が１mm以上であることを特徴とする。The fibrous tricalcium silicate hydrate according to the present invention, which achieves the above object, comprises Ca
MgO and an alkali metal hydroxide are added to a mixture of calcareous material and siliceous material so that the O / SiO 2 molar ratio is 1.6 to 4.0, and the hydrothermal reaction is performed under saturated vapor pressure. And
The fiber length is 1 mm or more.
【０００７】また、一方の本発明に係る繊維状トリカル
シウムシリケート水和物の製造方法は、CaO/SiO2モル比
が1.６〜4.０となるように石灰質原料と珪酸質原料とを
混合したものに、MgO を全原料に対して0.５〜2.０重量
％添加あるいは含有せしめ、次いでアルカリ金属の水酸
化物を0.１〜８.0規定の水溶液として全原料に対して１
０〜４０倍重量添加あるいは含有し、２２０〜３００℃
の飽和蒸気圧下で水熱反応させ、繊維長が１mm以上の繊
維状トリカルシウムシリケート水和物を得ることを特徴
とする。On the other hand, in the method for producing a fibrous tricalcium silicate hydrate according to the present invention, a calcareous raw material and a siliceous raw material are mixed so that the molar ratio of CaO / SiO 2 becomes 1.6 to 4.0. To the mixture, MgO was added or contained in an amount of 0.5 to 2.0% by weight based on the total amount of the raw materials, and then an alkali metal hydroxide was prepared as a 0.1 to 8.0 N aqueous solution with respect to all the raw materials. 1
0-40 times weight added or contained, 220-300 ° C
A fibrous tricalcium silicate hydrate having a fiber length of 1 mm or more.
【０００８】以下、本発明の内容を詳細に説明する。Hereinafter, the contents of the present invention will be described in detail.
【０００９】ここで一般にケイ酸カルシウム水和物と
は、石灰質原料とケイ酸質原料とを高温の飽和水蒸気圧
下で水熱反応させて得られるもので、CaO/SiO2モル比と
はこれらの配分をいい、本発明ではCaO/SiO2モル比が1.
６〜4.０のものを用いるのがよい。これはCaO/SiO2モル
比が1.６未満であると、トリカルシウムシリケート水和
物の結晶化度が低くなり、未反応ケイ酸質原料が残り、
また、4.０を超えると同様にトリカルシウムシリケート
水和物の結晶化度が低くなり未反応石灰質原料が残り、
共に好ましくない。Here, calcium silicate hydrate is generally obtained by subjecting a calcareous raw material and a siliceous raw material to a hydrothermal reaction under a high-temperature saturated steam pressure. The molar ratio of CaO / SiO 2 is This means that the CaO / SiO 2 molar ratio is 1.
It is preferable to use those having 6 to 4.0. If the molar ratio of CaO / SiO 2 is less than 1.6, the crystallinity of tricalcium silicate hydrate becomes low, and unreacted siliceous raw material remains,
In addition, if it exceeds 4.0, similarly, the crystallinity of tricalcium silicate hydrate decreases, and unreacted calcareous raw material remains,
Both are not preferred.
【００１０】ここで代表的な石灰質原料としては、例え
ば酸化カルシウム（生石灰），水酸化カルシウム（消石
灰），塩化カルシウム及び硫酸カルシウム等を挙げるこ
とができ、特に好ましくは酸化カルシウムを用いること
がよい。また代表的なケイ酸質原料としては、例えば石
英からなる珪石，珪砂，二酸化ケイ素よりなるシリカゲ
ル及びケイソウ土等を挙げることができる。本発明でア
ルカリ金属の水酸化物とは、例えば水酸化ナトリウム，
水酸化カリウムが例示される。またその添加・含有量は
0.１規定〜８.0規定の水溶液として、全原料に対して１
０〜４０倍重量添加あるいは含有すればよい。これは0.
１規定未満とすると、トリカルシウムシリケート水和物
が繊維状となりにくく、粒状となり、また８.0規定を超
えて添加してもトリカルシウムシリケート水和物の繊維
状化が伸長せず、共に好ましくないからである。Here, typical calcareous raw materials include, for example, calcium oxide (quick lime), calcium hydroxide (slaked lime), calcium chloride, calcium sulfate, etc., and particularly preferably, calcium oxide is used. Representative siliceous raw materials include, for example, quartzite made of quartz, silica sand, silica gel made of silicon dioxide, and diatomaceous earth. In the present invention, the alkali metal hydroxide is, for example, sodium hydroxide,
An example is potassium hydroxide. Also, its addition and content
0.1 to 8.0N aqueous solution
What is necessary is just to add or contain 0 to 40 times weight. This is 0.
When it is less than 1 normal, tricalcium silicate hydrate is hard to be fibrous and becomes granular, and even if added over 8.0 normal, the fibrous formation of tricalcium silicate hydrate does not elongate, and both are preferable. Because there is no.
【００１１】本発明でMgO を添加するのは、後の実施例
に示すように結晶の伸長作用を増長させるために添加す
るものであり、全原料に対して0.５〜2.０重量％添加ま
たは含有していればよい。これはMgO が0.５重量％未満
では繊維長を１mm以上に成長するのが困難となり、また
2.０重量％を超えて添加すると、繊維状トリカルシウム
シリケート水和物の生成量が低下し、共に好ましくない
からである。In the present invention, MgO is added in order to increase the crystal elongation effect, as will be shown in the examples below, and 0.5 to 2.0% by weight based on the whole raw materials. It may be added or contained. This is because if MgO is less than 0.5% by weight, it becomes difficult to grow the fiber length to 1 mm or more.
If it is added in excess of 2.0% by weight, the amount of fibrous tricalcium silicate hydrate produced decreases, and both are not preferred.
【００１２】本発明で水熱反応系における出発物質と水
との混合割合は任意であるが、出発原料１重量部に対し
て約１０〜４０倍重量とすればよい。In the present invention, the mixing ratio of the starting material and water in the hydrothermal reaction system is arbitrary, but may be about 10 to 40 times the weight of 1 part by weight of the starting material.
【００１３】本発明で水熱反応とは、水の飽和蒸気圧下
において、結晶化反応を促進させることをいい、繊維状
トリカルシウムシリケート水和物の形成に要する温度は
２２０〜３００℃とするのが好ましい。また、上記水熱
反応には攪拌を全く行わない静置水熱反応と、攪拌を行
う攪拌水熱反応との２つの方法が挙げることができる。
攪拌水熱反応は定速攪拌反応と可変攪拌反応とに区分さ
れるが、結晶の成長を増長させるためには定速攪拌反応
が望ましい。またその攪拌速度は、２０r.p.m 以下とす
るのが好ましい。また攪拌時間は２時間以下とすること
が好ましい。これは、２時間以上の長時間の攪拌とする
と繊維長が１mmより短くなり粒子状のものとなり、好ま
しくないからである。水熱反応時間は通常８〜２０時間
程度であれば十分である。水熱反応によって得られたス
ラリー状の生成物を、濾過した後水洗してアルカリ分を
洗い流し、その後乾燥することにより繊維長が１mm以上
の繊維状トリカルシウムシリケート水和物となる。In the present invention, the hydrothermal reaction means promoting the crystallization reaction under the saturated vapor pressure of water. The temperature required for forming the fibrous tricalcium silicate hydrate is from 220 to 300 ° C. Is preferred. The hydrothermal reaction includes two methods: a stationary hydrothermal reaction in which stirring is not performed at all, and a stirred hydrothermal reaction in which stirring is performed.
The stirred hydrothermal reaction is classified into a constant-speed stirring reaction and a variable stirring reaction, and a constant-speed stirring reaction is preferable in order to increase crystal growth. The stirring speed is preferably set to 20 rpm or less. Further, the stirring time is preferably 2 hours or less. This is because if the stirring is performed for a long time of 2 hours or more, the fiber length becomes shorter than 1 mm, and the fiber becomes particulate, which is not preferable. A hydrothermal reaction time of about 8 to 20 hours is usually sufficient. The slurry-like product obtained by the hydrothermal reaction is filtered, washed with water to remove the alkali, and then dried to obtain a fibrous tricalcium silicate hydrate having a fiber length of 1 mm or more.
【００１４】得られた繊維状トリカルシウムシリケート
水和物の粉末Ｘ線回折分析をした結果を図１に示す。化
学成分はほとんどがCaO ，SiO2，H2O からなる化合物で
Ca6(Si2O7)(OH)6 の化学組成であることが同定された。FIG. 1 shows the result of powder X-ray diffraction analysis of the obtained fibrous tricalcium silicate hydrate. Most of the chemical components are compounds consisting of CaO, SiO 2 and H 2 O
The chemical composition of Ca 6 (Si 2 O 7 ) (OH) 6 was identified.
【００１５】このように本発明によればアルカリ金属の
水酸化物に加えてMgO を添加して水熱反応せしめること
により、繊維長が大幅に増長した結果を得ることができ
る。またその繊維長は１mm以上のものが大部分であり、
安定して長繊維状の繊維状トリカルシウムシリケート水
和物を得ることができる。この得られた繊維長が１mm以
上の繊維状トリカルシウムシリケート水和物は各種建材
等の工業材料に用いて好適である。As described above, according to the present invention, by adding MgO in addition to the alkali metal hydroxide to cause a hydrothermal reaction, it is possible to obtain a result that the fiber length is greatly increased. Most of the fiber length is 1mm or more,
A long fiber fibrous tricalcium silicate hydrate can be stably obtained. The obtained fibrous tricalcium silicate hydrate having a fiber length of 1 mm or more is suitable for use in industrial materials such as various building materials.
【００１６】[0016]
【実施例】以下、本発明の好適な実施例を説明する。 実施例１ 酸化カルシウム（CaO ：９3.６％，MgO ：0.４％）１５
０ｇ、ケイ砂（SiO2：９9.４％）５０ｇ、CaO/SiO2モル
比≒3.０、MgO をlg及び２規定水酸化ナトリウム溶液６
０００ccを混合後、攪拌機付１００００ccオートクレー
ブに仕込み、２６０℃の飽和蒸気圧下で１５時間無攪拌
の静置水熱反応を行った。また同様にして２６０℃の飽
和蒸気圧下で攪拌速度１０r.p.m の定速攪拌を１時間行
った後静置水熱反応を行った。この結果、静置反応のみ
の場合は繊維長が1.１mmの繊維状トリカルシウムシリケ
ート水和物が生成した。また、定速攪拌を１時間行った
場合には、繊維長が1.３mmの繊維状トリカルシウムシリ
ケート水和物が生成した。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. Example 1 Calcium oxide (CaO: 93.6%, MgO: 0.4%) 15
0 g, silica sand (SiO 2 : 99.4%) 50 g, CaO / SiO 2 molar ratio ≒ 3.0, MgO lg and 2N sodium hydroxide solution 6
After mixing 000 cc, the mixture was charged into a 10000 cc autoclave equipped with a stirrer, and subjected to a static hydrothermal reaction without stirring under a saturated vapor pressure of 260 ° C. for 15 hours. In the same manner, constant-speed stirring at a stirring speed of 10 rpm was performed for 1 hour under a saturated vapor pressure of 260 ° C., and then a stationary hydrothermal reaction was performed. As a result, in the case of only the standing reaction, a fibrous tricalcium silicate hydrate having a fiber length of 1.1 mm was produced. In addition, when the stirring at a constant speed was performed for 1 hour, a fibrous tricalcium silicate hydrate having a fiber length of 1.3 mm was formed.
【００１７】実施例２ 上記MgO の添加を2.４ｇとした以外は、実施例１と同様
に操作して水熱反応を行った。この結果、静置反応のみ
の場合は繊維長が1.２mmの繊維状トリカルシウムシリケ
ート水和物が生成した。また定速攪拌を１時間行った場
合には、繊維長が1.４mmの繊維状トリカルシウムシリケ
ート水和物が生成した。Example 2 A hydrothermal reaction was carried out in the same manner as in Example 1 except that the amount of MgO added was changed to 2.4 g. As a result, in the case of only the standing reaction, a fibrous tricalcium silicate hydrate having a fiber length of 1.2 mm was produced. When the stirring was performed at a constant speed for 1 hour, a fibrous tricalcium silicate hydrate having a fiber length of 1.4 mm was formed.
【００１８】実施例３ 上記MgO の添加を2.４ｇとし、４規定水酸化ナトリウム
溶液を用いた以外は実施例１と同様に操作して水熱反応
を行った。この結果、静置反応のみの場合は繊維長が1.
３mmの繊維状トリカルシウムシリケート水和物が生成し
た。また定速攪拌を１時間行った場合には、繊維長が1.
４mmの繊維状トリカルシウムシリケート水和物が生成し
た。Example 3 A hydrothermal reaction was carried out in the same manner as in Example 1 except that the addition of MgO was 2.4 g and a 4N sodium hydroxide solution was used. As a result, the fiber length is 1.
3 mm of fibrous tricalcium silicate hydrate formed. When constant-speed stirring is performed for 1 hour, the fiber length is 1.
4 mm of fibrous tricalcium silicate hydrate was formed.
【００１９】実施例４ 上記MgO の添加を１ｇとし、４規定水酸化ナトリウム溶
液を用いた以外は、実施例１と同様に操作して水熱反応
を行った。この結果、静置反応のみの場合は繊維長が1.
２mmの繊維状トリカルシウムシリケート水和物が生成し
た。また定速攪拌を１時間行った場合には、繊維長が1.
４mmの繊維状トリカルシウムシリケート水和物が生成し
た。Example 4 A hydrothermal reaction was carried out in the same manner as in Example 1 except that the addition of MgO was 1 g and a 4N sodium hydroxide solution was used. As a result, the fiber length is 1.
2 mm of fibrous tricalcium silicate hydrate was formed. When constant-speed stirring is performed for 1 hour, the fiber length is 1.
4 mm of fibrous tricalcium silicate hydrate was formed.
【００２０】実施例５ 上記MgO の添加を１ｇとし、６規定水酸化ナトリウム溶
液を用いた以外は、実施例１と同様に操作して水熱反応
を行った。この結果、静置反応のみの場合は繊維長が1.
５mmの繊維状トリカルシウムシリケート水和物が生成し
た。また定速攪拌を１時間行った場合には、繊維長が1.
４mmの繊維状トリカルシウムシリケート水和物が生成し
た。Example 5 A hydrothermal reaction was carried out in the same manner as in Example 1 except that the amount of MgO was changed to 1 g and a 6N sodium hydroxide solution was used. As a result, the fiber length is 1.
5 mm of fibrous tricalcium silicate hydrate was formed. When constant-speed stirring is performed for 1 hour, the fiber length is 1.
4 mm of fibrous tricalcium silicate hydrate was formed.
【００２１】実施例６ 上記MgO の添加を2.４ｇとし、６規定水酸化ナトリウム
溶液を用いた以外は、実施例１と同様に操作して水熱反
応を行った。この結果、静置反応のみの場合は繊維長が
1.４mmの繊維状トリカルシウムシリケート水和物が生成
した。また定速攪拌を１時間行った場合には、繊維長が
1.５mmの繊維状トリカルシウムシリケート水和物が生成
した。Example 6 A hydrothermal reaction was carried out in the same manner as in Example 1 except that the amount of MgO added was 2.4 g and a 6N sodium hydroxide solution was used. As a result, in the case of only the stationary reaction, the fiber length is
A 1.4 mm fibrous tricalcium silicate hydrate formed. When constant-speed stirring is performed for one hour, the fiber length is
A 1.5 mm fibrous tricalcium silicate hydrate formed.
【００２２】比較例１ 水酸化ナトリウム及びMgO を添加しない以外は実施例１
と同様に操作した。 比較例２ 水酸化ナトリウムを添加せずMgO を2.４ｇ添加した以外
は実施例１と同様に操作した。 比較例３ 水酸化ナトリウムを添加せずMgO を5.２ｇ添加した以外
は実施例１と同様に操作した。 比較例４ MgO を添加せず２規定水酸化ナトリウム溶液６０００cc
を添加した以外は実施例１と同様に操作した。 比較例５ ２規定水酸化ナトリウム溶液６０００cc及びMgO を5.２
ｇ添加した以外は実施例１と同様に操作した。 比較例６ ６規定水酸化ナトリウム溶液６０００cc及びMgO を5.２
ｇ添加した以外は実施例１と同様に操作した。Comparative Example 1 Example 1 except that sodium hydroxide and MgO were not added.
The same operation was performed. Comparative Example 2 The same operation as in Example 1 was performed except that 2.4 g of MgO was added without adding sodium hydroxide. Comparative Example 3 The same operation as in Example 1 was performed except that 5.2 g of MgO was added without adding sodium hydroxide. Comparative Example 4 6000 cc of 2N sodium hydroxide solution without adding MgO
The same operation as in Example 1 was performed except that was added. Comparative Example 5 5.2 N sodium hydroxide solution 6000 cc and MgO 5.2
The same operation as in Example 1 was performed except that g was added. COMPARATIVE EXAMPLE 6 6000 cc of 6N sodium hydroxide solution and 5.2 of MgO were added.
The same operation as in Example 1 was performed except that g was added.
【００２３】以上の結果を下記「表１」に示す。The above results are shown in Table 1 below.
【００２４】[0024]
【表１】 [Table 1]
【００２５】表１に示すように、実施例１〜６において
各々１時間攪拌を行った場合の方が結晶の伸長効果が発
現された。As shown in Table 1, in each of Examples 1 to 6, when stirring was performed for 1 hour, the effect of elongating the crystal was exhibited.
【００２６】実施例７〜９ 実施例１における攪拌反応時の攪拌スピードを５r.p.m,
１５r.p.m 及び２０r.p.m と各々変化させた以外は実施
例１と同様に操作した。Examples 7 to 9 The stirring speed during the stirring reaction in Example 1 was set at 5 rpm,
The same operation as in Example 1 was carried out except that each was changed to 15 rpm and 20 rpm.
【００２７】実施例１０〜１２ 実施例１における攪拌水熱反応の攪拌時間を0.５時間，
1.５時間及び２時間と各々変化させた以外は実施例１と
同様に操作した。Examples 10 to 12 The stirring time of the stirring hydrothermal reaction in Example 1 was 0.5 hour,
The same operation as in Example 1 was carried out except that the time was changed to 1.5 hours and 2 hours, respectively.
【００２８】以上の結果を下記「表２」に示す。The above results are shown in Table 2 below.
【００２９】[0029]
【表２】 [Table 2]
【００３０】[0030]
【発明の効果】以上実施例と共に詳しく述べたように本
発明によれば石灰質原料とケイ酸質原料とを混合したも
のに、MgO 及びアルカリ金属の水酸化物とを併存させて
水熱反応をすることにより、繊維長が１mm以上と長い長
繊維の繊維状トリカルシウムシリケート水和物を安定し
て製造することができる。As described above in detail with the embodiments, according to the present invention, a mixture of a calcareous material and a siliceous material is mixed with MgO and an alkali metal hydroxide to carry out a hydrothermal reaction. By doing so, fibrous tricalcium silicate hydrate having a long fiber length of 1 mm or more can be stably produced.
【図１】繊維状トリカルシウムシリケート水和物のＸ線
回折のグラフである。FIG. 1 is a graph of X-ray diffraction of fibrous tricalcium silicate hydrate.
フロントページの続き (56)参考文献 特開 平４−21516（ＪＰ，Ａ) 特開 平２−116610（ＪＰ，Ａ) 特開 昭54−134095（ＪＰ，Ａ) 特開 昭48−28400（ＪＰ，Ａ) 特開 平２−97444（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C01B 33/24 101 C04B 14/00 ＷＰＩ／Ｌ（ＱＵＥＳＴＥＬ) ＣＡ（ＳＴＮ) ＪＩＣＳＴファイル（ＪＯＩＳ)Continuation of the front page (56) References JP-A-4-21516 (JP, A) JP-A-2-116610 (JP, A) JP-A-54-134095 (JP, A) JP-A-48-28400 (JP) (A) JP-A-2-97444 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C01B 33/24 101 C04B 14/00 WPI / L (QUESTEL) CA (STN) JICST File (JOIS)
Claims (3)
に石灰質原料と珪酸質原料とを混合したものに、MgO 及
びアルカリ金属の水酸化物を添加し、飽和蒸気圧下で水
熱反応してなり、且つ繊維長が１mm以上であることを特
徴とする繊維状トリカルシウムシリケート水和物。1. A mixture of a calcareous raw material and a siliceous raw material so that the molar ratio of CaO / SiO 2 becomes 1.6 to 4.0, MgO and a hydroxide of an alkali metal are added, and saturated steam is added. A fibrous tricalcium silicate hydrate characterized by a hydrothermal reaction under pressure and a fiber length of 1 mm or more.
に石灰質原料と珪酸質原料とを混合したものに、MgO を
全原料に対して0.５〜2.０重量％添加あるいは含有せし
め、次いでアルカリ金属の水酸化物を0.１〜８.0規定の
水溶液として全原料に対して１０〜４０倍重量添加ある
いは含有し、２２０〜３００℃の飽和蒸気圧下で水熱反
応させ、繊維長が１mm以上の繊維状トリカルシウムシリ
ケート水和物を得ることを特徴とする繊維状トリカルシ
ウムシリケート水和物の製造方法。2. A mixture of a calcareous raw material and a siliceous raw material such that the molar ratio of CaO / SiO 2 is 1.6 to 4.0, and MgO is added to the total raw material in an amount of 0.5 to 2.0. % By weight, and then add or contain 10 to 40 times the weight of the alkali metal hydroxide as a 0.1 to 8.0 normal aqueous solution with respect to all raw materials at a saturated vapor pressure of 220 to 300 ° C. A method for producing fibrous tricalcium silicate hydrate, wherein a hydrothermal reaction is performed to obtain a fibrous tricalcium silicate hydrate having a fiber length of 1 mm or more.
リケート水和物の製造方法において、 上記水熱反応が静置水熱反応又は定速攪拌水熱反応であ
ることを特徴とする繊維状トリカルシウムシリケート水
和物の製造方法。3. The method for producing a fibrous tricalcium silicate hydrate according to claim 2, wherein the hydrothermal reaction is a stationary hydrothermal reaction or a constant-speed stirring hydrothermal reaction. A method for producing calcium silicate hydrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10728892A JP3290460B2 (en) | 1992-04-27 | 1992-04-27 | Fibrous tricalcium silicate hydrate and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10728892A JP3290460B2 (en) | 1992-04-27 | 1992-04-27 | Fibrous tricalcium silicate hydrate and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05301709A JPH05301709A (en) | 1993-11-16 |
| JP3290460B2 true JP3290460B2 (en) | 2002-06-10 |
Family
ID=14455299
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10728892A Expired - Fee Related JP3290460B2 (en) | 1992-04-27 | 1992-04-27 | Fibrous tricalcium silicate hydrate and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3290460B2 (en) |
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1992
- 1992-04-27 JP JP10728892A patent/JP3290460B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05301709A (en) | 1993-11-16 |
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