JPH11255552A - Expandable hydraulic material - Google Patents

Expandable hydraulic material

Info

Publication number
JPH11255552A
JPH11255552A JP7490398A JP7490398A JPH11255552A JP H11255552 A JPH11255552 A JP H11255552A JP 7490398 A JP7490398 A JP 7490398A JP 7490398 A JP7490398 A JP 7490398A JP H11255552 A JPH11255552 A JP H11255552A
Authority
JP
Japan
Prior art keywords
calcium oxide
hydraulic material
fly ash
concrete
calcium
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.)
Granted
Application number
JP7490398A
Other languages
Japanese (ja)
Other versions
JP3517824B2 (en
Inventor
Shuichi Okamoto
修一 岡本
Yasunori Matsuoka
康訓 松岡
Takefumi Shindou
竹文 新藤
Eiji Owaki
英司 大脇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taisei Corp filed Critical Taisei Corp
Priority to JP07490398A priority Critical patent/JP3517824B2/en
Publication of JPH11255552A publication Critical patent/JPH11255552A/en
Application granted granted Critical
Publication of JP3517824B2 publication Critical patent/JP3517824B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

PROBLEM TO BE SOLVED: To obtain an expandable hydraulic material by admixing concrete, mortal or cement paste with calcium oxide-rich fly ash to effect hydration reaction of the calcium oxide to form calcium hydroxide crystals so as to expand the cement paste by the aid of the crystals, and also to contribute to utilization of fly ash as an industrial waste. SOLUTION: The fly ash to be used is such one that the calcium oxide content is higher than the acceptable value specified in accordance with the JIS Standard. This hydraulic material may be admixed with another hydraulic material consisting mainly of calcium oxide, calcium sulfoaluminate or hauyne. The calcium oxide-rich fly ash, when mixed with cement and kneaded with water, forms calcium hydroxide crystals by hydration reaction, leading to expanding concrete or mortar by the aid of the crystals, thereby enabling concrete cracking to be suppressed and filler integrity to be secured after concrete or mortar hardening.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、膨張性水硬材料に
関する。TECHNICAL FIELD The present invention relates to an expandable hydraulic material.

【０００２】[0002]

【従来の技術】膨張コンクリート、モルタルあるいはセ
メントペーストの製造に用いる混和材として、膨張材を
用いることが知られている。膨張材としては、酸化カル
シウム、カルシウムサルホアルミネート、アウインなど
を主成分としたものが知られている。2. Description of the Related Art It is known to use an expanding material as an admixture for producing expanded concrete, mortar or cement paste. As the intumescent material, a material mainly containing calcium oxide, calcium sulfoaluminate, eauin or the like is known.

【０００３】[0003]

【本発明が解決しようとする課題】主成分として酸化カ
ルシウム、カルシウムサルホアルミネート、アウインな
どを用いた従来の水硬材料は、非常に高価である。A conventional hydraulic material using calcium oxide, calcium sulfoaluminate, or auin as a main component is very expensive.

【０００４】本発明は以上の問題点を解決するためにな
されたもので、廃棄処分されていた酸化カルシウム含有
量の多いフライアッシュ（石炭灰）を有効利用し、膨張
力および経済性に優れた、膨張性水硬材料を提供するこ
とにある。The present invention has been made in order to solve the above problems, and effectively utilizes fly ash (coal ash) containing a large amount of calcium oxide which has been discarded, and has excellent expansion power and economic efficiency. To provide an expandable hydraulic material.

【０００５】[0005]

【課題を解決するための手段】本発明は、コンクリー
ト、モルタルあるいはセメントペーストに、酸化カルシ
ウムの含有量の多いフライアッシュを混和して成り、前
記フライアッシュ中の酸化カルシウムを水和反応させ、
水酸化カルシウムの結晶を生成し、この結晶の力でコン
クリート、モルタルあるいはセメントペーストを膨張さ
せることを特徴とする、膨張性水硬材料である。また本
発明は、前述した膨張性水硬材料に、酸化カルシウムや
カルシウムサルホアルミネートあるいはアウインなどを
主成分とした水硬材料を混和したことを特徴とする、膨
張性水硬材料である。According to the present invention, concrete, mortar or cement paste is mixed with fly ash having a high calcium oxide content, and the calcium oxide in the fly ash is subjected to a hydration reaction.
It is an expandable hydraulic material characterized by generating crystals of calcium hydroxide and expanding concrete, mortar or cement paste with the power of the crystals. Further, the present invention is an inflatable hydraulic material characterized by mixing a hydraulic material mainly containing calcium oxide, calcium sulfoaluminate, or eauin with the above-described expandable hydraulic material.

【０００６】[0006]

【発明の実施の形態１】以下、本発明の膨張性水硬材料
について説明する。[Embodiment 1] The expansive hydraulic material of the present invention will be described below.

【０００７】本発明の膨張性水硬材料は、従来コンクリ
ートの混和材として用いられている酸化カルシウムの含
有量がＪＩＳ規格の許容値内であるフライアッシュ（石
炭灰）よりも、酸化カルシウムの含有量の多い前記規格
を超過したフライアッシュを混和材として用いる。酸化
カルシウム［ＣａＯ］の含有量の多いフライアッシュ
は、セメントに混合し、水［Ｈ2 Ｏ］と混練した場合、
水和反応により水酸化カルシウム［Ｃａ（ＯＨ）2 ］の
結晶を生成し、この結晶の力によりコンクリートあるい
はモルタルを膨張させる。この膨張力を利用するため、
酸化カルシウム含有量が規格の超過したフライアッシュ
をセメントに混和して用いることにより、コンクリート
のひび割れ抑制、充填材の硬化後の一体性確保などを図
ることが可能となる膨脹性水硬材料を得ることができ
る。また本発明の膨張性水硬材料は、その膨張力から静
的破砕材の補助材料として用いることも考えられる。な
お、本発明の膨張性水硬材料を得るために、前記フライ
アッシュに加えて、従来の水硬材料を混合して用いるこ
とも可能である。[0007] The expandable hydraulic material of the present invention contains more calcium oxide than fly ash (coal ash), which is conventionally used as an admixture for concrete and has a calcium oxide content within the allowable value of JIS standards. A large amount of fly ash exceeding the standard is used as an admixture. When fly ash having a high content of calcium oxide [CaO] is mixed with cement and kneaded with water [H 2 O],
Crystals of calcium hydroxide [Ca (OH) 2 ] are generated by the hydration reaction, and the force of these crystals expands concrete or mortar. To use this expansion force,
By using fly ash with calcium oxide content exceeding the standard used in the cement, an inflatable hydraulic material is obtained that can suppress cracking of concrete and ensure the integrity of the filler after curing. be able to. In addition, the expandable hydraulic material of the present invention may be used as an auxiliary material of a static crushed material due to its expanding force. In addition, in order to obtain the expandable hydraulic material of the present invention, a conventional hydraulic material can be mixed and used in addition to the fly ash.

【０００８】[0008]

【発明の効果】本発明は以上説明したようになるから次
のような効果を得ることができる。 ＜イ＞ 産業廃棄物として処分されていた酸化カルシウ
ム含有量の多いフライアッシュ（石炭灰）を有効利用す
ることができる。 ＜ロ＞ 酸化カルシウム、カルシウムサルホアルミネー
ト、アウインなどの従来の水硬材料と比較して、非常に
安価であり、経済性が高い。As described above, the present invention has the following effects. <A> Fly ash (coal ash) containing a large amount of calcium oxide, which has been disposed of as industrial waste, can be effectively used. <B> Compared with conventional hydraulic materials such as calcium oxide, calcium sulfoaluminate, and Auyne, they are very inexpensive and economically high.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大脇 英司 東京都新宿区西新宿一丁目25番１号 大成 建設株式会社内 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Eiji Owaki Taisei Construction Co., Ltd. 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 コンクリート、モルタルあるいはセメ
ントペーストに、酸化カルシウムの含有量の多いフライ
アッシュを混和して成り、 前記フライアッシュ中の酸化カルシウムを水和反応さ
せ、水酸化カルシウムの結晶を生成し、この結晶の力で
コンクリート、モルタルあるいはセメントペーストを膨
張させることを特徴とする、 膨張性水硬材料。1. A concrete, mortar or cement paste mixed with fly ash having a high content of calcium oxide, wherein the calcium oxide in the fly ash is subjected to a hydration reaction to produce calcium hydroxide crystals, An expandable hydraulic material characterized by expanding concrete, mortar or cement paste with the power of these crystals. 【請求項２】 請求項１に記載の膨張性水硬材料に、
酸化カルシウムやカルシウムサルホアルミネートあるい
はアウインなどを主成分とした水硬材料を混和したこと
を特徴とする、膨張性水硬材料。2. The expandable hydraulic material according to claim 1,
An expandable hydraulic material characterized by mixing a hydraulic material mainly containing calcium oxide, calcium sulfoaluminate, or Auyne.
JP07490398A 1998-03-09 1998-03-09 Expandable hydraulic material Expired - Fee Related JP3517824B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07490398A JP3517824B2 (en) 1998-03-09 1998-03-09 Expandable hydraulic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07490398A JP3517824B2 (en) 1998-03-09 1998-03-09 Expandable hydraulic material

Publications (2)

Publication Number Publication Date
JPH11255552A true JPH11255552A (en) 1999-09-21
JP3517824B2 JP3517824B2 (en) 2004-04-12

Family

ID=13560824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07490398A Expired - Fee Related JP3517824B2 (en) 1998-03-09 1998-03-09 Expandable hydraulic material

Country Status (1)

Country Link
JP (1) JP3517824B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104446117A (en) * 2014-11-18 2015-03-25 桂林华越环保科技有限公司 Concrete expansion agent
WO2021011013A1 (en) * 2019-07-18 2021-01-21 Halliburton Energy Services, Inc. Metal that hydrates in wellbore fluid and creates an expanding cement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104446117A (en) * 2014-11-18 2015-03-25 桂林华越环保科技有限公司 Concrete expansion agent
CN104446117B (en) * 2014-11-18 2016-08-17 桂林华越环保科技有限公司 Cement expansive material
WO2021011013A1 (en) * 2019-07-18 2021-01-21 Halliburton Energy Services, Inc. Metal that hydrates in wellbore fluid and creates an expanding cement
US10913885B1 (en) 2019-07-18 2021-02-09 Halliburton Energy Services, Inc. Metal that hydrates in wellbore fluid and creates an expanding cement
GB2596995A (en) * 2019-07-18 2022-01-12 Halliburton Energy Services Inc Metal that hydrates in wellbore fluid and creates an expanding cement
GB2596995B (en) * 2019-07-18 2023-12-13 Halliburton Energy Services Inc Metal that hydrates in wellbore fluid and creates an expanding cement

Also Published As

Publication number Publication date
JP3517824B2 (en) 2004-04-12

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