JPH11292600A - Production of slightly calcium leaching cement composition - Google Patents

Production of slightly calcium leaching cement composition

Info

Publication number
JPH11292600A
JPH11292600A JP9322998A JP9322998A JPH11292600A JP H11292600 A JPH11292600 A JP H11292600A JP 9322998 A JP9322998 A JP 9322998A JP 9322998 A JP9322998 A JP 9322998A JP H11292600 A JPH11292600 A JP H11292600A
Authority
JP
Japan
Prior art keywords
calcium
cement
production
cement composition
slightly
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
Application number
JP9322998A
Other languages
Japanese (ja)
Inventor
Eiji Owaki
英司 大脇
Yasunori Matsuoka
康訓 松岡
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 JP9322998A priority Critical patent/JPH11292600A/en
Publication of JPH11292600A publication Critical patent/JPH11292600A/en
Pending 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/16—Acids or salts thereof containing phosphorus in the anion, e.g. phosphates
    • 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
    • C04B22/08—Acids or salts thereof
    • C04B22/12—Acids or salts thereof containing halogen in the anion
    • C04B22/126—Fluorine compounds, e.g. silico-fluorine compounds
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a slightly calcium leaching cement compsn. by adding one or more phosphoric acid compds. or fluorides to a cement material. SOLUTION: One or more phosphoric acid compds. or fluorides are added to a cement material. Calcium in the cement can be converted into a calcium phosphate compd. to suppress the formation of calcium hydroxide and to prevent the leaching of calcium ions from the cement and the ordinary cement is converted into the objective slightly calcium leaching cement compsn. In order to produce this compsn., one or more compds. selected from phosphates of alkali (alkaline earth) metals, their hydrates and aluminum phosphate or from fluorides of alkali (alkaline earth) metals, their hydrates and aluminum fluoride are added so that apatite, octacalcium phosphate or the like is formed in place of calcium hydroxide formed from calcium in Portland cement.

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、難カルシウム溶出
性セメント組成物の製造方法に関する。[0001] The present invention relates to a method for producing a cement composition with low calcium elution.

【０００２】[0002]

【従来の技術】土質安定剤、地盤改良剤、有害物質の固
化剤などとして用いられるセメントは、地中においてセ
メント中のカルシウムイオンが溶解することが知られて
いる。また、構造物に用いられるコンクリートセグメン
トなどの公知のセメントより製造されるコンクリート部
材は、経年するとカルシウムイオンを溶出することが知
られている。2. Description of the Related Art It is known that calcium ions in cement used as soil stabilizers, soil improvement agents, solidifying agents for harmful substances, etc. dissolve in the ground. It is also known that concrete members manufactured from known cement such as concrete segments used for structures elute calcium ions over time.

【０００３】[0003]

【本発明が解決しようとする課題】前述した土質安定
剤、地盤改良剤、有害物質の固化剤などに用いたセメン
トからのカルシウムイオンが地下水に溶解し、地中のｐ
Ｈ値が高くなり、環境基準値を超えてしまう。また、構
造物を構成するコンクリート部材から溶出するカルシウ
ムイオンにより、構造物の周囲は、溶出するカルシウム
イオンの影響により、環境条件が時事変化し、安定しな
いことが知られている。この一例として放射性廃棄物処
理施設の場合には、周囲に設置した難透水性の粘土層の
性状が変化したり、放射性核種の溶解度に変化が生じる
ことがあり、施設における核種の閉じ込め性能が安定し
ない。[Problems to be Solved by the Invention] Calcium ions from cement used for the above-mentioned soil stabilizer, soil improvement agent, solidifying agent for harmful substances, etc. are dissolved in groundwater, and p
The H value increases and exceeds the environmental standard value. In addition, it is known that environmental conditions change from time to time due to calcium ions eluted from a concrete member constituting the structure, and the environment around the structure is not stable due to the influence of the eluted calcium ions. For example, in the case of a radioactive waste treatment facility, the properties of the poorly permeable clay layer installed around it and the solubility of radionuclides may change, and the nuclide confinement performance in the facility is stable. do not do.

【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、セメント水和物中に生成されていた水酸
化カルシウムを、リン酸カルシウム系の化合物として生
成させ、カルシウムイオンの溶解度を低減させる、難カ
ルシウム溶出性セメント組成物の製造方法を提供するこ
とにある。[0004] The present invention has been made to solve the above problems, and reduces calcium hydroxide produced in cement hydrate as a calcium phosphate compound to reduce the solubility of calcium ions. Another object of the present invention is to provide a method for producing a hardly calcium-eluting cement composition.

【０００５】[0005]

【課題を解決するための手段】本発明は、セメント材料
に、リン酸化合物またはフッ化物の一種または複数種を
添加し、セメント水和物中の水酸化カルシウムの生成を
低減し、セメント水和物中のカルシウムをリン酸カルシ
ウム系の化合物に固定することを特徴とする、難カルシ
ウム溶出性セメント組成物の製造方法である。SUMMARY OF THE INVENTION According to the present invention, a cement material is added with one or more of a phosphoric acid compound and a fluoride to reduce the production of calcium hydroxide in the cement hydrate, A method for producing a hardly calcium-eluting cement composition, comprising fixing calcium in a substance to a calcium phosphate compound.

【０００６】[0006]

【発明の実施の形態１】以下、本発明の難カルシウム溶
出性セメント組成物の製造方法について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for producing a cement composition having poor calcium elution according to the present invention will be described.

【０００７】カルシウムイオンが溶解しにくいセメント
組成物の製造は、セメント材料にリン酸化合物あるいは
フッ化物を、単独あるいは同時に添加して行う。これに
よりセメント中のカルシウムをリン酸カルシウム系の化
合物に生成することが可能となり、水酸化カルシウムの
生成を低減させることにより、セメントからのカルシウ
ムイオンの溶解を防止でき、通常のセメントを難カルシ
ウム溶出性セメント組成物とすることができる。The production of a cement composition in which calcium ions are hardly dissolved is carried out by adding a phosphate compound or a fluoride alone or simultaneously to a cement material. As a result, calcium in the cement can be formed into a calcium phosphate compound, and by reducing the generation of calcium hydroxide, the dissolution of calcium ions from the cement can be prevented. It can be a composition.

【０００８】[0008]

【実施例】以下、本発明の難カルシウム溶出性セメント
組成物の製造の具体例について説明する。EXAMPLES Specific examples of the production of the hardly calcium-eluting cement composition of the present invention will be described below.

【０００９】公知のポルトランドセメント中のカルシウ
ムをリン酸カルシウム系の化合物に生成するために、以
下の物質あるいはその水和物を添加する。The following substances or hydrates thereof are added in order to form calcium in a known Portland cement into a calcium phosphate compound.

【００１０】１） アルカリ金属のリン酸塩およびその
水和物1) Alkali metal phosphate and its hydrate

【００１１】２） アルカリ土類金属のリン酸塩および
その水和物2) Phosphates of alkaline earth metals and hydrates thereof

【００１２】３） アルミニウムのリン酸塩3) Aluminum phosphate

【００１３】４） アルカリ金属のフッ化物およびその
水和物4) Fluoride of alkali metal and hydrate thereof

【００１４】５） アルカリ土類金属のフッ化物および
その水和物5) Fluoride and hydrate of alkaline earth metal

【００１５】６） アルミニウムのフッ化物6) Aluminum fluoride

【００１６】以上の一種または複数種を添加し、ポルト
ランドセメント中のカルシウムにより生成されていた水
酸化カルシウムに代わり、アパタイト［Ｃａ10（Ｐ
Ｏ4 ）6 Ｘ2 、Ｘ＝ＯＨ，Ｆ，Ｃｌ］、リン酸八カルシ
ウム、非晶質リン酸カルシウム、α−Ｃａ3 （ＰＯ4 ）
2 、β−Ｃａ3 （ＰＯ4 ）2 、Ｃａ4 （ＰＯ4 ）2 、Ｃ
ａＨＰＯ4 ・２Ｈ2 Ｏ、のいずれか、もしくは複数を生
成する。Add one or more of the above and add
Water generated by calcium in land cement
Instead of calcium oxide, apatite [CaTen(P
OFour)6 XTwo, X = OH, F, Cl], octacalcium phosphate
Um, amorphous calcium phosphate, α-CaThree(POFour)
Two, Β-CaThree(POFour)Two, CaFour(POFour)Two , C
aHPOFour・ 2HTwoO, one or more of
To achieve.

【００１７】[0017]

【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＞ セメントを、土質安定剤、地盤改良剤、有害物
質の固化剤などに用いても、セメントからのカルシウム
イオンが溶解せず、地中の性状に変化を与える事がな
く、環境基準値を守ることができる。従って、周辺環境
に影響を与えてはならない場所におけるセメントの各種
使用が可能となる。 ＜ロ＞ コンクリート部材から溶出するカルシウムイオ
ン量を低減させることにより、コンクリート部材の周囲
地盤などの性状に影響を与えないなど、周辺環境の安定
性を確保できる。詳しくは、本発明の方法により製造し
たコンクリート部材を、例えば放射性廃棄物処理施設に
用いた場合、施設周囲に設置した難透水性の粘土層の性
状が変化せず、高い難透水性を保つことが可能となり、
また放射性核種の溶解度への影響も起こらない。As described above, the present invention has the following effects. <B> Even if cement is used as a soil stabilizer, ground improver, or solidifying agent for harmful substances, calcium ions from cement do not dissolve and do not change the properties of the ground, and are environmental standard values. Can be protected. Therefore, various uses of the cement in a place where the surrounding environment must not be affected are enabled. <B> By reducing the amount of calcium ions eluted from the concrete member, the stability of the surrounding environment can be ensured without affecting the properties of the surrounding ground of the concrete member. Specifically, when the concrete member manufactured by the method of the present invention is used in, for example, a radioactive waste treatment facility, the property of the poorly permeable clay layer installed around the facility does not change, and the high permeability is maintained. Becomes possible,
There is no effect on the solubility of radionuclides.

フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 111:12 Continued on the front page (51) Int.Cl. 6 Identification code FI C04B 111: 12

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 セメント材料に、リン酸化合物または
フッ化物の一種または複数種を添加し、 セメント水和物中の水酸化カルシウムの生成を低減し、
セメント水和物中のカルシウムをリン酸カルシウム系の
化合物に固定することを特徴とする、 難カルシウム溶出性セメント組成物の製造方法。Claims: 1. A cement material to which one or more of a phosphoric acid compound and a fluoride is added to reduce the production of calcium hydroxide in cement hydrate,
A method for producing a calcium-resistant eluting cement composition, comprising fixing calcium in a cement hydrate to a calcium phosphate compound.
JP9322998A 1998-04-06 1998-04-06 Production of slightly calcium leaching cement composition Pending JPH11292600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9322998A JPH11292600A (en) 1998-04-06 1998-04-06 Production of slightly calcium leaching cement composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9322998A JPH11292600A (en) 1998-04-06 1998-04-06 Production of slightly calcium leaching cement composition

Publications (1)

Publication Number Publication Date
JPH11292600A true JPH11292600A (en) 1999-10-26

Family

ID=14076724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9322998A Pending JPH11292600A (en) 1998-04-06 1998-04-06 Production of slightly calcium leaching cement composition

Country Status (1)

Country Link
JP (1) JPH11292600A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006099748A1 (en) * 2005-03-25 2006-09-28 Innovative Bioceramix, Inc. Hydraulic cement compositions and methods of making and using the same
WO2007051290A1 (en) * 2005-10-31 2007-05-10 Innovative Bioceramix, Inc. High strength biological cement composition and using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006099748A1 (en) * 2005-03-25 2006-09-28 Innovative Bioceramix, Inc. Hydraulic cement compositions and methods of making and using the same
WO2007051290A1 (en) * 2005-10-31 2007-05-10 Innovative Bioceramix, Inc. High strength biological cement composition and using the same
US7553362B2 (en) 2005-10-31 2009-06-30 Innovative Bioceramix, Inc. High strength biological cement composition and using the same

Similar Documents

Publication Publication Date Title
US4507154A (en) Chloride-free setting accelerator for hydraulic binding agents
KR100821445B1 (en) Antimicrobial agent for concrete, concrete composition and concrete article
KR101355392B1 (en) Cement composite with improved acid proof and salt-resistance, mortar cement composite for repairing the concrete structure and repairing method of concrete structure using the mortar cement composite
JP2022133746A (en) Two agent-type quick setting agent, spraying material, and spraying method
JP2008511531A (en) Encapsulation medium
JP5015193B2 (en) Ground injection material and ground injection method
JP4955123B2 (en) Ground injection material and ground injection method
JP2002363560A (en) Soil-aggregative caking agent for improvement of highly hydrous soft soil
JPH11292600A (en) Production of slightly calcium leaching cement composition
JPH06167597A (en) Composition for manufacture of barrier for prevention of diffusion of contaminant and manufacture of barrier
JP2000143326A (en) Low-alkali hydraulic material
JP4780803B2 (en) Ground improvement method
JP3072346B2 (en) Ground injection material
JP2008273993A (en) Heavy metal elution inhibitor and heavy metal elution-inhibiting construction method
JPH1034125A (en) Solidifying agent for sludge, organic soil, and harmful soil
JPH10279937A (en) Cement-based solidifying material
JPH1135940A (en) Cement-based, solidifying agent for organic soil
JP3205900B2 (en) Grout material for ground injection
JP3226510B2 (en) Ground hardening method
JP4752038B2 (en) Method for treating gypsum to reduce elution of contained fluorine
JPH05140558A (en) Grout for porous substance such as microsand
JPH0249197A (en) Method of solidifying radioactive waste with cement and solidified body
JP2552612B2 (en) Ground injection chemical
JPS60124689A (en) Conditioning of ground
JP4948661B2 (en) Ground improvement method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050120

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20071011

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20071016

A521 Written amendment

Effective date: 20071214

Free format text: JAPANESE INTERMEDIATE CODE: A523

A131 Notification of reasons for refusal

Effective date: 20080311

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Effective date: 20080508

Free format text: JAPANESE INTERMEDIATE CODE: A523

A02 Decision of refusal

Effective date: 20090106

Free format text: JAPANESE INTERMEDIATE CODE: A02