JPH06144894A - Alumina solidification material - Google Patents
Alumina solidification materialInfo
- Publication number
- JPH06144894A JPH06144894A JP11676592A JP11676592A JPH06144894A JP H06144894 A JPH06144894 A JP H06144894A JP 11676592 A JP11676592 A JP 11676592A JP 11676592 A JP11676592 A JP 11676592A JP H06144894 A JPH06144894 A JP H06144894A
- Authority
- JP
- Japan
- Prior art keywords
- strength
- alumina
- alumina cement
- anhydrous gypsum
- solidifying material
- 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.)
- Pending
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
- 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
- C04B28/16—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 containing anhydrite, e.g. Keene's cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】
【目的】 早強性、耐火性、耐食性等の優れた性質を有
するアルミナセメントの唯一の欠点である温度条件によ
る強度低下を防止するために、アルミナセメントを無水
石膏で置換してなる強度低下しないアルミナ系固化材を
提供する。
【構成】 暴露する温度条件によってアルミナセメント
硬化体は著しく強度低下するが、アルミナセメントをII
I（αおよび／またはβ）型無水石膏で２０％〜７５％
置換してなるアルミナ系固化材を用いることによって、
その硬化体の強度低下は著しく改善され、土木・建築用
建設資材等に広く用いることができる。(57) [Abstract] [Purpose] Alumina cement is replaced with anhydrous gypsum in order to prevent strength deterioration due to temperature conditions, which is the only drawback of alumina cement having excellent properties such as early strength, fire resistance, and corrosion resistance. Provided is an alumina-based solidifying material which does not deteriorate in strength. [Structure] The strength of the hardened alumina cement significantly decreases depending on the temperature conditions of exposure.
20% to 75% with I (α and / or β) type anhydrous gypsum
By using the alumina-based solidifying material obtained by substitution,
The strength reduction of the cured product is remarkably improved, and it can be widely used for civil engineering and construction materials for construction.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アルミナセメントの欠
点である温度条件による強度低下をIII（αおよび／ま
たはβ）型無水石膏を用いて改善した固化材に関するも
ので、その固化材は、土木・建築用建設資材などの幅広
い分野で用いることができる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solidifying material in which the decrease in strength due to temperature conditions, which is a drawback of alumina cement, is improved by using type III (α and / or β) type anhydrous gypsum. It can be used in a wide range of fields such as civil engineering and construction materials.
【０００２】[0002]
【従来の技術】現在、アルミナセメントは、早強性、耐
火性、耐食性等の優れた性質を生かして幅広い用途に使
用されているものの、アルミナセメントを用いたペース
ト、モルタルおよびコンクリートは、長時間の経過もし
くは湿度および温度が高い時には、それらの強度が低下
するという欠点を有している。2. Description of the Related Art At present, although alumina cement is used for a wide range of applications by taking advantage of its excellent properties such as early strength, fire resistance, and corrosion resistance, paste, mortar and concrete using alumina cement can be used for a long time. They have the disadvantage that their strength is reduced when the temperature of the samples is high or when the humidity and temperature are high.
【０００３】そこで、そのアルミナセメントの欠点であ
る強度低下の防止を目的とした研究が広く行われてお
り、塩化アルミニウム、炭酸ナトリウム、ケイ酸ナトリ
ウム、バレイショデンプン、フライアッシュ、普通ポル
トランドセメント等を混和材として用いることにより、
若干改善されるとの報告がなされていが、実用に十分な
強度低下改善には至ってないのが現状である。Therefore, studies have been widely conducted for the purpose of preventing the decrease in strength, which is a drawback of the alumina cement, by mixing aluminum chloride, sodium carbonate, sodium silicate, potato starch, fly ash, ordinary Portland cement and the like. By using it as a material,
Although it has been reported that the strength will be slightly improved, the present situation is that the strength has not been sufficiently reduced and improved for practical use.
【０００４】[0004]
【発明が解決しようとする課題】アルミナセメントは、
ある条件下では、その強度が低下するという欠点を有し
ている。この強度低下は、アルミナセメントの主成分で
あるアルミン酸石灰の水和反応にて生成される準安定鉱
物（ＣＡＨ10、Ｃ2ＡＨ8、Ｃ3ＡＨ13）が、長時間の経
過もしくは湿度および比較的温度が高い時には転化を起
こし、安定鉱物（Ｃ3ＡＨ6）に変化し、その際、硬化体
中の空隙率が増加することに因るものと考えられてい
る。そのため、アルミナセメントを用いた製品の調合設
計、製造および施工には細心の注意を払わなければなら
ない。例えば、アルミナセメントを用いたモルタルおよ
びコンクリートは、５０℃程度の温度でもその強度は、
比較的短時間で低下する。５０℃程度の温度は、夏期の
自然条件下の路盤、壁面なども十分になり得ることを考
慮すれば、アルミナセメントの強度低下は大きな問題と
なっている。[Problems to be Solved by the Invention] Alumina cement is
Under certain conditions, it has the disadvantage that its strength is reduced. This decrease in strength is caused by the metastable minerals (CAH 10 , C 2 AH 8 , C 3 AH 13 ) produced by the hydration reaction of lime aluminate, which is the main component of alumina cement, over a long period of time or when the humidity and It is considered that when the temperature is relatively high, it causes conversion and changes into a stable mineral (C 3 AH 6 ), and at that time, the porosity in the hardened body increases. Therefore, great care must be taken in the compounding design, manufacture and construction of products using alumina cement. For example, the strength of mortar and concrete using alumina cement is about 50 ° C even at a temperature of about 50 ° C.
It decreases in a relatively short time. Considering that a temperature of about 50 ° C. may be sufficient for roadbeds, wall surfaces, etc. under natural conditions in summer, the decrease in strength of alumina cement is a serious problem.
【０００５】しかしながら、本発明者は、かかる問題を
解決すべく鋭意検討を重ねた結果、アルミナセメント
が、早強性、耐火性、耐食性等の優れた性質を有してい
ることに着目し、III型無水石膏を用いることによっ
て、強度低下しない優れたアルミナ系固化材が得られる
ことを見いだし、本発明に到達した。However, as a result of intensive studies to solve such problems, the present inventor has noticed that alumina cement has excellent properties such as early strength, fire resistance, and corrosion resistance. It was found that an excellent alumina-based solidifying material that does not deteriorate in strength can be obtained by using type III anhydrous gypsum, and has reached the present invention.
【０００６】[0006]
【課題を解決するための手段】すなわち、本発明は、ア
ルミナセメントをIII（αおよび／またはβ）型無水石
膏で２０％〜７５％置換してなる強度低下しないことを
特徴とするアルミナ系固化材である。以下に本発明につ
いて詳細に説明する。That is, the present invention is characterized in that the alumina cement is replaced by III (α and / or β) type anhydrous gypsum in an amount of 20% to 75% and the strength does not decrease. It is a material. The present invention will be described in detail below.
【０００７】本発明は、アルミナセメントをIII（αお
よび／またはβ）型無水石膏で２０％〜７５％置換して
均一に混ぜ合わせ、アルミナ系固化材を製造し、そのア
ルミナ系固化材、骨材および水を練り混ぜ、養生するこ
とによって、温度によって強度低下しない土木・建築用
建設資材等を作製することができる。The present invention replaces alumina cement with 20% to 75% of III (α and / or β) type anhydrous gypsum and mix them uniformly to produce an alumina-based solidifying material. By kneading and curing wood and water, it is possible to produce civil engineering and construction materials for construction, etc. that do not deteriorate in strength due to temperature.
【０００８】本発明に用いるアルミナセメントとして
は、一般に用いられる、ＪＩＳ１種、ＪＩＳ２種等が挙
げられる。As the alumina cement used in the present invention, there are commonly used JIS type 1 and JIS type 2.
【０００９】本発明の無水石膏は、古くから広く用いら
れ、よく知られている窯業原料、工業薬品、医薬品等の
種類の溶解度が最も高いIII型無水石膏である。そのIII
型無水石膏は、更に、熱的性状、格子の変化の物性が若
干相違するαおよびβに分けられるが、これらは、それ
ぞれ、αおよびβ型半水石膏をカ焼することによって製
造されている。The anhydrous gypsum of the present invention is type III anhydrous gypsum which has been widely used since ancient times and has the highest solubility in well-known ceramic raw materials, industrial chemicals, pharmaceuticals and the like. Part III
Type anhydrous gypsum is further divided into α and β, which have slightly different thermal properties and changes in the physical properties of the lattice. These are produced by calcining α and β type hemihydrate gypsum, respectively. .
【００１０】暴露する温度条件によってアルミナセメン
ト硬化体には著しい強度低下が見られるが、アルミナセ
メントをIII（αおよび／またはβ）型無水石膏で置換
したアルミナ系固化材を用いることによって、その硬化
体の強度低下は改善される。また、温度条件にかかわら
ず、アルミナセメントを僅かの量のIII（αおよび／ま
たはβ）型無水石膏で置換した時にはその硬化体の強度
は低いものの、無水石膏の置換率の増加に伴ってその硬
化体の強度は高くなり、置換率：約５０％でほぼ最大値
を与え、しかもその硬化体の温度による強度低下は非常
に小さくなる。Although the strength of the alumina cement hardened product is remarkably reduced depending on the temperature conditions to which it is exposed, the hardening can be achieved by using an alumina-based solidifying material in which the alumina cement is replaced with III (α and / or β) type anhydrous gypsum. The strength loss of the body is improved. Further, irrespective of the temperature conditions, when the alumina cement was replaced with a small amount of III (α and / or β) type anhydrous gypsum, the strength of the hardened product was low, but with the increase of the replacement rate of anhydrous gypsum, The strength of the cured product becomes high, and a substitution ratio of about 50% gives an almost maximum value, and the strength of the cured product is not significantly reduced by temperature.
【００１１】一般に広く用いられている普通ポルトラン
ドセメントの硬化体の強度が、約２４０（ｋｇｆ／ｃｍ
2）であることから考慮すれば、アルミナ系固化材のア
ルミナセメントへのIII（αおよび／またはβ）型無水
石膏の置率換は、２０％〜７５％とすることが適当であ
る。アルミナ系固化材のアルミナセメントへのIII（α
および／またはβ）型無水石膏の置率換が２０％未満の
場合、その硬化体の強度は、２４０（ｋｇｆ／ｃｍ2）
以下であるので不適当である。また、アルミナ系固化材
のアルミナセメントへのIII（αおよび／またはβ）型
無水石膏の置率換が７５％を越える場合もまた、その硬
化体の強度は２４０(ｋｇｆ／ｃｍ2)以下であるので不
適当である。The strength of the hardened body of ordinary Portland cement, which is widely used, is about 240 (kgf / cm).
Considering that it is 2 ), it is appropriate that the substitution rate of the III (α and / or β) type anhydrous gypsum in the alumina cement of the alumina solidifying material is 20% to 75%. III (α
And / or β) type anhydrous gypsum with a replacement rate of less than 20%, the strength of the cured product is 240 (kgf / cm 2 ).
It is unsuitable because it is the following. Also, when the replacement rate of type III (α and / or β) anhydrous gypsum in the alumina cement of the alumina-based solidifying agent exceeds 75%, the strength of the cured product is 240 (kgf / cm 2 ) or less. It is inappropriate because it exists.
【００１２】アルミナ系固化材を用いて製品を製造する
場合、用いられるその製品の用途によって異なる求めら
れる強度に応じて、自由にアルミナ系固化材の配合設計
をすることができる。When a product is manufactured by using the alumina-based solidifying material, it is possible to freely design the composition of the alumina-based solidifying material according to the required strength which varies depending on the intended use of the product.
【００１３】骨材としては、通常用いられる砂、砂利等
の他に、石炭灰、下水汚泥焼却灰、生ゴミ焼却灰、製紙
スラッジ、鋳物砂、研磨粉等の一般および産業廃棄物の
一種または二種以上のものを用いることもできる。As the aggregate, in addition to commonly used sand, gravel, etc., a kind of general and industrial waste such as coal ash, sewage sludge incineration ash, raw garbage incineration ash, papermaking sludge, foundry sand, and abrasive powder, or It is also possible to use two or more types.
【００１４】[0014]
実施例１〜６ 以下に本発明を実施例を挙げて更に具体的に説明する。 Examples 1 to 6 The present invention will be described in more detail below with reference to examples.
【００１５】ＪＩＳ Ｒ ５２０１（セメントの物理試験
方法）に準じて、アルミナセメントをIII（β）型無水
石膏で置換してなる固化材 （置換率：20.0, 25.0, 5
0.0,56.2 および 75.0 ％）およびIII（α）型無水石膏
で置換してなる固化材（置換率：50.0 ％）と珪砂の配
合を１：３（重量比）として水を加えて均一に練り混
ぜ、成形および養生した供試体を、２０℃または５０℃
の乾燥機中に７日間暴露して、その圧縮強度を測定し
た。その結果を［表−１］に示す。A solidifying material obtained by substituting III (β) type anhydrous gypsum for alumina cement according to JIS R 5201 (physical test method for cement) (substitution rate: 20.0, 25.0, 5).
0.0,56.2 and 75.0%) and III (α) type anhydrous gypsum as a solidifying material (substitution rate: 50.0%) and silica sand are mixed at a ratio of 1: 3 (weight ratio), and water is added and mixed evenly. Molded and cured specimens at 20 ℃ or 50 ℃
Was exposed to the dryer for 7 days to measure its compressive strength. The results are shown in [Table-1].
【００１６】[0016]
【表−１】 [Table-1]
【００１７】比較例１〜６Comparative Examples 1-6
【００１８】実施例と同様に、アルミナセメントをIII
（β）型無水石膏で置換してなる固化材（置換率：0,
5.0, 12.5, 87.5, 100.0 ％）および普通ポルトランド
セメントと珪砂の配合を１：３（重量比）とした供試体
を作製し、２０℃または５０℃の乾燥機中に７日間暴露
してその圧縮強度を測定した。Alumina cement was added to III as in the example.
Solidification material obtained by replacing with (β) type anhydrous gypsum (substitution rate: 0,
5.0, 12.5, 87.5, 100.0%) and ordinary Portland cement and silica sand were mixed in a ratio of 1: 3 (weight ratio) to prepare a specimen, which was exposed to a dryer at 20 ° C or 50 ° C for 7 days and compressed. The strength was measured.
【００１９】[0019]
【発明の効果】［表−１］に示すとおり、本発明の、ア
ルミナセメントおよびIII（αおよび／またはβ）型無
水石膏からなる固化材は、アルミナセメントの欠点であ
る高い温度での強度低下を改善するのみならず、アルミ
ナセメントの特徴を生かした、高強度発現性のある新し
いアルミナ系固化材であり、インターロッキングブロッ
ク、テラゾータイル、歩道用平板等をはじめとする幅広
い用途で用いることができる。As shown in [Table 1], the solidifying material comprising the alumina cement and the III (α and / or β) type anhydrous gypsum according to the present invention has a drawback in strength reduction at a high temperature which is a drawback of the alumina cement. Is a new alumina-based solidifying material that exhibits high strength, making use of the characteristics of alumina cement, and can be used in a wide range of applications including interlocking blocks, terrazzo tiles, sidewalk flat plates, etc. it can.
【００２０】また、アルミナ系固化材の、土木・建築用
建設資材等への利用における実用上の強度の面を考慮す
れば、その配合はアルミナセメントに対してIII型無水
石膏の置換率を、２０％〜７５％とすることが適当であ
る。Considering the practical strength of the alumina-based solidifying material for use in civil engineering / construction materials for construction, etc., the composition is such that the substitution rate of type III anhydrous gypsum for alumina cement is: It is suitable to be 20% to 75%.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年４月２６日[Submission date] April 26, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００３[Name of item to be corrected] 0003
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００３】そこで、このようなアルミナセメントの欠
点である温度低下の防止を目的とした研究が広く行われ
ており、塩化アルミニウム、炭酸ナトリウム、ケイ酸ナ
トリウム、バレイショデンプン、フライアッシュ、普通
ポルトランドセメント等を混和材として用いることによ
り、若干改善されるとの報告がなされているが、実用に
十分な強度低下改善には至っていないのが現状である。Therefore, studies have been widely conducted for the purpose of preventing the temperature drop, which is a drawback of such alumina cement, and include aluminum chloride, sodium carbonate, sodium silicate, potato starch, fly ash, ordinary Portland cement, etc. the by using as the admixture, but that have reported to be slightly improved is made, not yet been practically sufficient strength reduction improvement at present.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１１】一般に広く用いられている普通ポルトラン
ドセメントの硬化体の圧縮強度が、約２４０（ｋｇｆ／
ｃｍ２）であることから考慮すれば、アルミナ系固化材
のアルミナセメントへのＩＩＩ（αおよび／またはβ）
型無水石膏の置換率は、２０％〜７５％とすることが適
当である。アルミナ系固化材のアルミナセメントへのＩ
ＩＩ（αおよび／またはβ）型無水石膏の置換率が２０
％未満の場合、その硬化体の圧縮強度は、２４０（ｋｇ
ｆ／ｃｍ２）以下であるので不適当である。また、アル
ミナ系固化材のアルミナセメントへのＩＩＩ（αおよび
／またはβ）型無水石膏の置換率が７５％を越える場合
もまた、その硬化体の圧縮強度は２４０（ｋｇｆ／ｃｍ
２）以下であるので不適当である。The compressive strength of the hardened body of ordinary Portland cement, which is generally widely used, is about 240 (kgf /
cm 2 ), it is considered that III (α and / or β) of alumina-based solidifying material to alumina cement
The substitution rate of the anhydrous gypsum mold is appropriately 20% to 75%. Alumina-based solidifying material for alumina cement I
The substitution rate of the II (α and / or β) type anhydrous gypsum is 20
%, The compressive strength of the cured product is 240 (kg
f / cm 2 ) or less, which is unsuitable. Also, when the substitution rate of the III (α and / or β) type anhydrous gypsum for the alumina cement of the alumina-based solidifying material exceeds 75%, the compressive strength of the cured product is 240 (kgf / cm2).
2 ) It is unsuitable because it is below.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】アルミナ系固化材を用いて製品を製造する
場合、用いられる製品の用途によって求められる強度は
異なるが、それに応じて自由にアルミナ系固化材の配合
設計をすることができる。When a product is manufactured using an alumina-based solidifying material, the strength required for the intended use of the product is
Although different, it is possible to freely design the composition of the alumina-based solidifying material accordingly .
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１４[Correction target item name] 0014
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１４】[0014]
【実施例】以下、実施例により本発明を具体的に説明す
る。 実施例１〜６EXAMPLES The present invention will be specifically described below with reference to examples.
It Examples 1-6
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１８[Correction target item name] 0018
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１８】実施例と同様にして、アルミナセメントを
ＩＩＩ（β）型無水石膏で置換してなる固化材（置換
率：０，５．０，１２．５，８７．５，１００．０％）
および普通ポルトランドセメントと珪砂の配合を１：３
（重量比）とした供試体を作製し、２０℃または５０℃
の乾燥機中に７日間暴露してその圧縮強度を測定した。[0018] In the same way as in Example, consolidated material the alumina cement comprising substituted with III (beta) type anhydrous gypsum (substitution rate: 0,5.0,12.5,87.5,100.0% )
And the mixture of ordinary Portland cement and silica sand is 1: 3.
(Weight ratio) to prepare a specimen, 20 ℃ or 50 ℃
Was exposed to a dryer for 7 days to measure its compressive strength.
Claims (1)
たはβ）型無水石膏で２０％〜７５％置換してなる強度
低下しないことを特徴とする固化材。1. A solidifying material, which is obtained by substituting 20% to 75% of III (α and / or β) type anhydrous gypsum for alumina cement and does not decrease in strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11676592A JPH06144894A (en) | 1992-04-10 | 1992-04-10 | Alumina solidification material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11676592A JPH06144894A (en) | 1992-04-10 | 1992-04-10 | Alumina solidification material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06144894A true JPH06144894A (en) | 1994-05-24 |
Family
ID=14695182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11676592A Pending JPH06144894A (en) | 1992-04-10 | 1992-04-10 | Alumina solidification material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06144894A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007000500A1 (en) * | 2005-06-27 | 2007-01-04 | Gypsmix Sarl | Granular composition comprising an anhydrite iii hydraulic binder and an alumina-based granular material |
| WO2007065527A3 (en) * | 2005-12-07 | 2007-08-23 | Gypsmix Sarl | Method for stabilising metastable soluble anhydrite iii, method for producing a hydraulic binder based thereon, the obtained hydraulic binder, the uses thereof and an industrial plant for carrying out said method |
-
1992
- 1992-04-10 JP JP11676592A patent/JPH06144894A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007000500A1 (en) * | 2005-06-27 | 2007-01-04 | Gypsmix Sarl | Granular composition comprising an anhydrite iii hydraulic binder and an alumina-based granular material |
| WO2007065527A3 (en) * | 2005-12-07 | 2007-08-23 | Gypsmix Sarl | Method for stabilising metastable soluble anhydrite iii, method for producing a hydraulic binder based thereon, the obtained hydraulic binder, the uses thereof and an industrial plant for carrying out said method |
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