JPH0739531B2 - Lightweight aggregate and manufacturing method thereof - Google Patents
Lightweight aggregate and manufacturing method thereofInfo
- Publication number
- JPH0739531B2 JPH0739531B2 JP60013644A JP1364485A JPH0739531B2 JP H0739531 B2 JPH0739531 B2 JP H0739531B2 JP 60013644 A JP60013644 A JP 60013644A JP 1364485 A JP1364485 A JP 1364485A JP H0739531 B2 JPH0739531 B2 JP H0739531B2
- Authority
- JP
- Japan
- Prior art keywords
- lightweight aggregate
- aggregate
- water
- phenolic
- absorbent
- 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 - Lifetime
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、軽量骨材及びその製造方法に関し、さらに詳
しくは良好な耐アルカリ性を有するフェノール樹脂組成
物を吸水性軽量骨材に被覆してなる耐水性に優れた軽量
骨材及びその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a lightweight aggregate and a method for producing the same, and more specifically, a water-absorbent lightweight aggregate is coated with a phenol resin composition having good alkali resistance. And a lightweight aggregate having excellent water resistance and a method for producing the same.
＜従来の技術＞ 吸水性軽量骨材には天然物（軽石、溶岩等）と人工物
（造粒、非造粒）等があるが、これら軽量骨材は一般に
吸水量が多いため、コンクリート練混ぜ等にさきだちプ
レウェッチングを行っているのが現状である。しかし、
プレウェッチングを行なった骨材は水分管理上の煩雑化
を招き、さらに、プレウェッチングを行うことにより骨
材内部に水が入った状態でコンクリートに使われること
になるので凍結融解に対する抵抗性が低下してしまうと
いう問題点があった。<Prior Art> Water-absorbing lightweight aggregates include natural products (pumice, lava, etc.) and artificial products (granulated, non-granulated). Since these lightweight aggregates generally absorb a large amount of water, The current situation is that pre-wetting is performed before mixing. But,
Pre-wetting aggregates complicate the management of water content, and by pre-wetting, the aggregates will be used in concrete with water inside, so resistance to freeze-thaw However, there was a problem in that
＜発明が解決しようとする問題点＞ このような状況のもと、本発明者等はあらかじめ吸水性
骨材にフェノール系樹脂を被覆することにより上記の問
題点を解決できることを見い出した。（特許申請中）し
かしながら、フェノール系樹脂のフェノール性OH基はア
ルカリ可溶性成分であるため、コンクリート中のアルカ
リ性成分により溶出してしまうという問題があった。<Problems to be Solved by the Invention> Under these circumstances, the present inventors have found that the above problems can be solved by coating a water-absorbing aggregate with a phenolic resin in advance. (Patent pending) However, since the phenolic OH group of the phenolic resin is an alkali-soluble component, there is a problem that it is eluted by the alkaline component in the concrete.
＜問題点を解決するための手段＞ 本発明者等はこのような欠点を解決すべく鋭意検討した
結果、アルカリ可溶性成分であるフェノール性OH基の全
て或いは一部をマスキングしたフェノール系樹脂組成物
を吸水性軽量骨材に被覆することにより、軽量骨材のア
ルカリ可溶性を大幅に改良できることを見い出し、本発
明に至ったものである。即ち、本発明はアルカリ可溶性
成分であるフェノール性OH基を全て、或いは一部をマス
キングすることにより良好な耐アルカリ性を有するフェ
ノール系樹脂組成物を吸水性軽量骨材に被覆してなる耐
吸水性に優れた、軽量骨材及びその製造方法である。<Means for Solving Problems> As a result of intensive investigations by the present inventors to solve such drawbacks, a phenol-based resin composition in which all or part of the phenolic OH groups that are alkali-soluble components are masked It was found that the water-absorbent lightweight aggregate can be significantly improved in the alkali solubility of the lightweight aggregate, and the present invention has been completed. That is, the present invention is a water-absorbent lightweight aggregate formed by coating a phenolic resin composition having good alkali resistance by masking all or part of a phenolic OH group which is an alkali-soluble component. A lightweight aggregate and a method for producing the same.
本発明に係るフェノール系樹脂組成物となる原料フェノ
ールとは石炭酸、クレゾール類、キシレノール類、ブチ
ルフェノール類、オクチルフェノール類、ビスフェノー
ルＡ、フェニルフェノール、ビスフェノールＳ等のアル
キルフェノール類似構造を有するフェノール類、ｐ−ビ
ニルフェノール、ｏ−イソプロペニルフェノール等のア
ルケニルフェノール類等をホルムアルデヒド等と反応さ
せてフェノール樹脂にした物であり、また耐アルカリ性
のよい樹脂とは上記原料を用いてアルカリ可溶性成分あ
るフェノール性OH基をすべて、あるいは部分的にマスキ
ングを行ったものである。The raw material phenol to be the phenolic resin composition according to the present invention is a phenol having a structure similar to alkylphenol such as coal acid, cresols, xylenols, butylphenols, octylphenols, bisphenol A, phenylphenol and bisphenol S, p-vinyl. Phenol, alkenylphenols such as o-isopropenylphenol and the like are reacted with formaldehyde and the like to give a phenol resin, and a resin having good alkali resistance is a phenolic OH group which is an alkali-soluble component using the above raw materials. All or part is masked.
マスキング方法としてはエステル化、ウレタン化、アセ
チル化、エポキシ化等の方法がある。又、アンモニア、
ヘキサミン等を用いてフェノール性OH基をマスキングす
る方法のいずれを用いても良い。Examples of the masking method include esterification, urethane formation, acetylation, and epoxidation. Also, ammonia,
Any method of masking the phenolic OH group with hexamine or the like may be used.
本発明に係る吸水性骨材とは軽石、溶岩等の天然物、造
粒性、非造粒性の人工軽量骨材を示す。The water-absorbing aggregate according to the present invention refers to a natural product such as pumice and lava, and an artificial lightweight aggregate having a granulating property and a non-granulating property.
本発明になる耐アルカリ性のよいフェノール樹脂組成物
の吸水性骨材被覆への適用は次のとおりである。The application of the phenol resin composition having good alkali resistance according to the present invention to the coating of the water-absorbing aggregate is as follows.
溶剤（メタノール、アセトン等）に溶解した耐アルカリ
性を有するフェノール樹脂の溶液中に吸水性軽量骨材を
浸して短時間で吸液浸透させて被覆し、これを脱溶剤お
よび熱処理硬化する方法（ディッピング法）により耐吸
水性軽量骨材を得る。またミキサー等に耐アルカリ性を
有するフェノール樹脂と吸水性骨材を入れて被覆、熱処
理硬化する方法（ミキシング法）等により耐吸水性軽量
骨材を得る。A method of immersing a water-absorbent lightweight aggregate in a solution of an alkali-resistant phenol resin dissolved in a solvent (methanol, acetone, etc.), allowing it to absorb and permeate it in a short time, and coating it, and then removing the solvent and heat-curing it. Method) to obtain a water-absorbent and lightweight aggregate. Further, a water-absorbent lightweight aggregate is obtained by, for example, a method in which a phenol resin having alkali resistance and a water-absorbent aggregate are put in a mixer or the like and covered and heat-treated to cure (mixing method).
本発明による吸水性骨材への耐アルカリ性フェノール樹
脂組成物の被覆量は骨材に対して0.5〜10％であり、好
ましくは１〜５％である。0.5％未満では被覆が不十分
となり吸水量が多くなる。また、10％を越えれば軽量化
が損なわれる。The amount of the alkali-resistant phenolic resin composition coated on the water-absorbent aggregate according to the present invention is 0.5 to 10%, preferably 1 to 5% based on the aggregate. If it is less than 0.5%, the coating is insufficient and the water absorption increases. If it exceeds 10%, the weight reduction is impaired.
以下、本発明の実施例を示すが、本発明は実施例に限ら
れるものではない。特に断わりのない限り部および％は
重量である。Examples of the present invention will be shown below, but the present invention is not limited to the examples. Parts and percentages are by weight unless otherwise noted.
実施例１ を有するフェノール樹脂（特公昭56−28708）300部をア
セトン−メタノール混合溶液700部に溶解し、ディッピ
ング法（常温、常圧化５分）にて人工軽量骨材（造粒
型）1000部に樹脂被覆し、80℃/10分で脱溶剤を行い、
その後180℃/30分にて熱処理して、フェノール樹脂被覆
人工軽量骨材を得た。Example 1 Dissolve 300 parts of a phenolic resin (Japanese Patent Publication No. 56-28708) with 700 parts of acetone-methanol mixed solution, and make it 1000 parts of artificial lightweight aggregate (granulation type) by dipping method (normal temperature, normal pressure 5 minutes). Resin coating, desolvation at 80 ℃ / 10 minutes,
Then, heat treatment was performed at 180 ° C./30 minutes to obtain a phenol resin-coated artificial lightweight aggregate.
実施例２ を有するフェノール樹脂300部をアセトン−メタノール
混合溶液700部に溶解しディッピング法（常温、常圧下
５分）にて人工軽量骨材（非造粒）1000部に樹脂被覆
し、80℃/10分脱溶剤をおこない、その後180℃/30分熱
処理して、フェノール樹脂被覆人工軽量骨材を得た。Example 2 Dissolve 300 parts of a phenolic resin containing a mixture in 700 parts of an acetone-methanol mixed solution and coat the resin with 1000 parts of an artificial lightweight aggregate (non-granulated) by the dipping method (normal temperature, 5 minutes under normal pressure), 80 ° C / 10 minutes The solvent was removed, and then heat treatment was performed at 180 ° C / 30 minutes to obtain a phenol resin-coated artificial lightweight aggregate.
実施例３ 実施例１に示す構造物を有するフェノール樹脂600部を
アセトン−メタノール混合溶液700部に溶解し、ディッ
ピング法（常温、常圧下５分）にて人工軽量骨材（造粒
型）1000部に樹脂被覆して、80℃/10分で脱溶剤を行
い、その後180℃/30分で熱処理してフェノール樹脂被覆
人工軽量骨材を得た。Example 3 600 parts of a phenol resin having the structure shown in Example 1 was dissolved in 700 parts of an acetone-methanol mixed solution, and an artificial lightweight aggregate (granulation type) 1000 was prepared by a dipping method (normal temperature, 5 minutes under normal pressure). The part was coated with a resin, the solvent was removed at 80 ° C. for 10 minutes, and then heat-treated at 180 ° C. for 30 minutes to obtain a phenol resin-coated artificial lightweight aggregate.
実施例４ 人工軽量骨材1000部（造粒型）を180℃まで加熱し、ミ
キサー内に入れる。このミキサーを120r.p.mにて回転さ
せながらこの中へ実施例−１に示す構造を有するフェノ
ール樹脂30部を添加し、30分間被覆、熱処理し、フェノ
ール樹脂被覆人工軽量骨材を得た。Example 4 1000 parts of artificial lightweight aggregate (granulation type) is heated to 180 ° C. and placed in a mixer. While rotating this mixer at 120 rpm, 30 parts of the phenol resin having the structure shown in Example-1 was added thereto, and the mixture was coated and heat-treated for 30 minutes to obtain a phenol resin-coated artificial lightweight aggregate.
比較例 実施例１と同じ方法で、マスキングされていない汎用レ
ゾール樹脂を用いて、フェノール樹脂被覆人工軽量骨材
を得た。Comparative Example In the same manner as in Example 1, a phenol resin-coated artificial lightweight aggregate was obtained using an unmasked general-purpose resol resin.
前記実施例及び比較例で得た軽量骨材の吸水率測定を行
った結果を表−１〜表−２に示す。The results of measuring the water absorption rate of the lightweight aggregates obtained in the above Examples and Comparative Examples are shown in Table-1 and Table-2.
＜発明の効果＞ 実施例と比較例から明らかなように本発明のフェノール
系樹脂で被覆した軽量骨材は汎用のフェノール樹脂で被
覆したものに比べ、吸水率が格段と小さく産業上極めて
有益である。 <Effects of the Invention> As is clear from the examples and comparative examples, the lightweight aggregate coated with the phenolic resin of the present invention has a remarkably small water absorption rate as compared with the one coated with a general-purpose phenol resin, which is extremely useful in industry. is there.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡田 武二 神奈川県横浜市戸塚区小菅ヶ谷町2804― 467 (72)発明者 沢出 稔 千葉県習志野市屋敷１―５―６―２ (56)参考文献 特開 昭57−182313（ＪＰ，Ａ) 特開 昭59−36121（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takeji Okada 2804-467 Kosugaya-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture (72) Minoru Sawade 1-5-6-2 (56) Mansion, Narashino-shi, Chiba Prefecture References JP-A-57-182313 (JP, A) JP-A-59-36121 (JP, A)
Claims (3)
を全てあるいは一部をマスキングすることにより得られ
る良好な耐アルカリ性を有するフェノール系樹脂組成物
を吸水性軽量骨材に被覆してなることを特徴とする軽量
骨材。1. A water-absorbent lightweight aggregate is coated with a phenolic resin composition having good alkali resistance obtained by masking all or part of a phenolic OH group which is an alkali-soluble component. A lightweight aggregate characterized by.
を全てあるいは一部をマスキングすることにより得られ
る良好な耐アルカリ性を有するフェノール系樹脂組成物
を溶剤にて溶解し、これに吸水性軽量骨材を浸し、吸液
浸透させ被覆した後、脱溶剤及び熱処理硬化することを
特徴とする軽量骨材の製造方法。2. A phenolic resin composition having good alkali resistance obtained by masking all or part of a phenolic OH group, which is an alkali-soluble component, is dissolved in a solvent, and water-absorbent and lightweight A method for producing a lightweight aggregate, which comprises dipping the aggregate, absorbing and permeating the aggregate to cover the aggregate, and then performing solvent removal and heat treatment curing.
を全てあるいは一部をマスキングすることにより得られ
る良好な耐アルカリ性を有するフェノール系樹脂組成物
と吸水性軽量骨材をミキサーに入れ、これらを攪拌し、
吸水性軽量骨材にフェノール系樹脂組成物を被覆、熱処
理硬化することを特徴とする軽量骨材の製造方法。3. A phenolic resin composition having good alkali resistance obtained by masking all or part of a phenolic OH group, which is an alkali-soluble component, and a water-absorbent lightweight aggregate are placed in a mixer. Agitate
A method for producing a lightweight aggregate, which comprises coating a water-absorbent lightweight aggregate with a phenolic resin composition and heat-curing it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013644A JPH0739531B2 (en) | 1985-01-29 | 1985-01-29 | Lightweight aggregate and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013644A JPH0739531B2 (en) | 1985-01-29 | 1985-01-29 | Lightweight aggregate and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61174216A JPS61174216A (en) | 1986-08-05 |
| JPH0739531B2 true JPH0739531B2 (en) | 1995-05-01 |
Family
ID=11838938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60013644A Expired - Lifetime JPH0739531B2 (en) | 1985-01-29 | 1985-01-29 | Lightweight aggregate and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739531B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57182313A (en) * | 1981-05-04 | 1982-11-10 | Asahi Organic Chem Ind Co Ltd | Modified phenol resin and its production |
| JPS5936121A (en) * | 1982-08-24 | 1984-02-28 | Sumitomo Chem Co Ltd | Allyl etherified cresol-novolak resin and manufacture of the same |
-
1985
- 1985-01-29 JP JP60013644A patent/JPH0739531B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61174216A (en) | 1986-08-05 |
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