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JPH11322399A - Concrete hardened body using extremely pulverized fly ash - Google Patents

Concrete hardened body using extremely pulverized fly ash

Info

Publication number
JPH11322399A
JPH11322399A JP11043856A JP4385699A JPH11322399A JP H11322399 A JPH11322399 A JP H11322399A JP 11043856 A JP11043856 A JP 11043856A JP 4385699 A JP4385699 A JP 4385699A JP H11322399 A JPH11322399 A JP H11322399A
Authority
JP
Japan
Prior art keywords
fly ash
concrete
cement
pts
solution
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
JP11043856A
Other languages
Japanese (ja)
Inventor
Chuichi Tashiro
忠一 田代
Yoji Komura
洋司 小村
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.)
SANIN KENSETSU KOGYO KK
Original Assignee
SANIN KENSETSU KOGYO KK
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 SANIN KENSETSU KOGYO KK filed Critical SANIN KENSETSU KOGYO KK
Priority to JP11043856A priority Critical patent/JPH11322399A/en
Publication of JPH11322399A publication Critical patent/JPH11322399A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Landscapes

  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Road Paving Structures (AREA)

Abstract

PROBLEM TO BE SOLVED: To develop a high strength of concrete in its very early stage and to obtain a high water tightness and chemical resistance by adding fly ash which is extremely pulverized to specify a Blaine specific surface area to a cement, kneading the mixture with an alkali reaction promoter solution and forming. SOLUTION: A cement is mixed with the fly ash extremely pulverized to >=4,000 cm<2> /g Blaine specific surface area and kneaded with <=7% alkali reaction promoter solution such as soda sulfate, heated, molded under pressure and cured. Preferably about 60 pts.wt. of the pulverized fly ash, about 40 pts.wt. of the cement and about 180 pts.wt. of sand are kneaded with about 30 pts.wt. of 5% sodium sulfate solution as the alkali reaction promoter solution, heated at about 80 deg.C for about 30 minutes and formed under pressure. Preferably the temperature in heating is the boiling point of water or above so as to obtain a reaction promoting effect. When the concrete is used for pavement, etc., a heated asphalt concrete is laminated to a rolled concrete, constructed and rolled.

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】この発明は主として路面又は
床面舗装用若しくはコンクリート二次製品用等のように
早強性を必要とするものに適した超微粉砕フライアッシ
ュを使用したコンクリート硬化体に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete hardened material using ultra-fine pulverized fly ash, which is suitable mainly for those requiring fast strength, such as for pavement on a road or a floor, or for secondary concrete products. .

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来フ
ライアッシュを混合したセメントを使用したコンクリー
トは、産業廃棄物であるフライアッシュを有効利用をす
る目的で開発されて来ているが、フライアッシュ混合コ
ンクリートは初期強度の発現が遅いため、早強性が必要
なコンクリートやコンクリート二次製品には使用されな
い。また、フライアッシュは、その外形が球状のため、
流動性を増大させるために使用されることが多く、球状
外形を破壊する超微粉砕については考えられなかった。
2. Description of the Related Art Conventionally, concrete using cement mixed with fly ash has been developed for the purpose of effectively utilizing industrial waste fly ash. Since mixed concrete has a low initial strength, it is not used for concrete or secondary concrete products that require early strength. Also, fly ash has a spherical outer shape,
Often used to increase fluidity, micronization that breaks the spherical profile was not considered.

【0003】次に、従来の転圧コンクリートは、施工後
の極早期強度の発現が必要なため、水セメント比の小さ
い超硬練り普通ポルトランドセメントを転圧しながら施
工するが、初期強度発現の遅いフライアッシュセメント
の使用は問題があった。使用してもフライアッシュが3
0%以下であり、初期強度が低く、実験的なものであ
る。
[0003] Next, conventional compacted concrete is required to develop an extremely early strength after the construction, and is therefore carried out while compacting ultra-hard kneaded ordinary Portland cement having a low water-cement ratio. The use of fly ash cement was problematic. 3 fly ash even if used
0% or less, low initial strength, experimental.

【0004】この発明は、フライアッシュを大量利用し
たコンクリートの極早期の強度発現問題を解決し、しか
も後期強度も伸び、乾燥収縮が小さい、水密性,化学抵
抗性の高いコンクリートを提供することを目的とする。
特に早期強度の必要な転圧コンクリート及びコンクリー
ト二次製品用材料に適用することを企図している。
[0004] The present invention solves the problem of the development of the strength of concrete using fly ash in a large amount at an extremely early stage, and also provides concrete having high watertightness and chemical resistance, which has an increased late-stage strength, a small dry shrinkage, and so on. Aim.
In particular, it is intended to be applied to materials for compacted concrete and concrete secondary products requiring early strength.

【0005】[0005]

【課題を解決するための手段】上記問題点を解決するた
めの本発明のコンクリート硬化体は第1に、セメントに
ブレーン比表面積4,000cm2/g以上に超微粉砕
したフライアッシュを添加したことを特徴としている。
In order to solve the above-mentioned problems, a concrete hardened body of the present invention comprises firstly adding fly ash which has been ultrafinely ground to a cement having a specific surface area of 4,000 cm 2 / g or more to cement. It is characterized by:

【0006】第2に7%以下のアルカリ性反応促進剤溶
液で混練し、水の沸点以下の高温で加熱した後加圧成形
したことを特徴としている。
Second, it is characterized in that it is kneaded with an alkaline reaction accelerator solution of 7% or less, heated at a high temperature below the boiling point of water, and then molded under pressure.

【0007】[0007]

【発明の実施の形態】本発明においては、通常微粉砕し
ないで使用されるフライアッシュを超微粉砕して、水を
使用せずにアルカリ溶液を混合して、その上加温,加圧
して作製されることを特徴としており、フライアッシュ
の水和反応を促進するための手法、即ち超微粉砕化、反
応促進剤としてのアルカリ溶液の使用、加温、加圧(転
圧)等の促進法を総合的に最適方法で適用させたもので
ある。
DETAILED DESCRIPTION OF THE INVENTION In the present invention, fly ash, which is usually used without pulverization, is pulverized, mixed with an alkaline solution without using water, and further heated and pressurized. It is characterized by being manufactured, and is a technique for accelerating the hydration reaction of fly ash, that is, micronization, use of an alkaline solution as a reaction accelerator, heating, pressurization (rolling), etc. The method is applied in an overall optimal manner.

【0008】以下その実施形態につき具体的に説明する
と、通常のフライアッシュをブレーン比表面積4,00
0cm2/g以上、例えば5,000cm2/g位迄のも
のを含む程度に超微粉砕化した超微粉砕フライアッシュ
60部、セメント40部及び砂180部を、アルカリ性
反応促進剤溶液としての5%硫酸ソーダ溶液30部で混
練し、80℃で30分加熱した後、直径5cm高さ5c
mの円柱に100kgf/cm2で加圧形成し、以後常
温湿空状態で、1日,3日間それぞれ養生した。その結
果本試料の圧縮強度は材令1日は219kgf/c
2,材令3日は302kgf/cm2のものが得られ
た。
[0008] The embodiment will be described in more detail below.
0 cm 2 / g or more, for example 5,000 cm 2 / g position until micronised fly ash 60 parts of micronised to the extent, including those, 40 parts cement and sand 180 parts, as alkaline reaction accelerator solution After kneading with 30 parts of 5% sodium sulfate solution and heating at 80 ° C. for 30 minutes, diameter 5 cm, height 5 c
m was pressed under a pressure of 100 kgf / cm 2 and then cured for 1 day and 3 days, respectively, in a humid air at room temperature. As a result, the compressive strength of this sample was 219 kgf / c for one day of material age.
m 2 , a material having a material age of 302 kgf / cm 2 was obtained on the third day.

【0009】これに対し、通常の未粉砕フライアッシュ
60部、セメント40部及び砂180部を水180部で
混練した場合の同一条件下の実験では、材令1日強度は
25kgf/cm2、材令3日強度は51kgf/c
2、材令7日強度は73kgf/cm2のものが得られ
た。また超微粉砕とほぼ同粒子からなる分級フライアッ
シュの20%混和モルタルの材令3日の強度は142k
gf/cm2であり、フライアッシュ混入量が少ない場
合は分級フライアッシュも強度が高まる。これらの事か
ら、通常の球状フライアッシュや未粉砕の分級微粒子フ
ライアッシュを用いた場合と、同量の超微粉砕フライア
ッシュを用いた場合の高強化及び早強度化の差が明らか
に判別できる。
On the other hand, in an experiment under the same conditions where 60 parts of ordinary uncrushed fly ash, 40 parts of cement and 180 parts of sand were kneaded with 180 parts of water, the one-day strength was 25 kgf / cm 2 , Material age 3 days strength 51kgf / c
m 2 , a 7-day old material having a strength of 73 kgf / cm 2 were obtained. In addition, the strength of a 3 day old mortar of 20% admixed mortar of classified fly ash consisting of the same particles as ultra-fine pulverization is 142k.
gf / cm 2 , and when the amount of fly ash mixed in is small, the classified fly ash also has an increased strength. From these facts, the difference between the case of using normal spherical fly ash and uncrushed classified fine particle fly ash and the case of using the same amount of ultra-fine crushed fly ash and the difference between high strengthening and early strengthening can be clearly distinguished. .

【0010】ちなみにセメント100部を用いた普通ポ
ルトランドセメントは約150kgf/cm2であるか
ら、これと比較しても強度の高さと早強化性が特段に優
れていることが明らかである。なお上記アルカリ性反応
促進剤としては、硫酸ソーダ溶液のほか、NaOH,K
OH,K2SO4等の使用が可能である。
Incidentally, since ordinary Portland cement using 100 parts of cement has a weight of about 150 kgf / cm 2 , it is apparent that the strength and the early strengthening property are particularly excellent in comparison with this. Examples of the alkaline reaction accelerator include sodium sulfate solution, NaOH, K
OH, K 2 SO 4 or the like can be used.

【0011】次にフライアッシュ量を多めにして超微粉
砕フライアッシュ80部、セメント20部、その他は上
記と同条件で実験を行った結果、材令1日強度は126
kgf/cm2、材令3日強度は216kgf/cm2
あった。ちなみに同一配合で通常の未粉砕フライアッシ
ュを用いた場合、材令1日では10〜15kgf/cm
2,同3日では30kgf/cm2であり、また上記普通
ポルトランドセメント100部使用のものに比しても十
分な高強度化が実現できるものと認められる。
Next, an experiment was carried out under the same conditions as described above except that the amount of fly ash was increased and 80 parts of ultra-fine pulverized fly ash, 20 parts of cement, and the like were found.
kgf / cm 2, wood-old three days strength was 216kgf / cm 2. By the way, when ordinary uncrushed fly ash is used in the same composition, 10 to 15 kgf / cm in one day of material age
2 and 3 days, it is 30 kgf / cm 2 , and it is recognized that a sufficiently high strength can be realized as compared with the case of using 100 parts of the ordinary Portland cement.

【0012】なお上記実施形態において明らかなよう
に、フライアッシュは単に燃焼廃棄された通常の球状分
級微粒子では限られた混入量の場合のみに効果があり、
このため本発明においては超微粒子に粉砕することを条
件としており、アルカリ性反応促進剤溶液も初期の効果
を得るためには7%以下の濃度であることが望ましい。
また微粉砕もブレーン比表面積も4,000cm2/g
以上(粒径約6μm以下)であることが望ましく、加熱
時の温度も反応促進効果を得るためには水の沸点(約1
00℃)以下が好ましい。
As is apparent from the above embodiment, fly ash is effective only in the case of ordinary spherical classified fine particles burnt and discarded when the mixed amount is limited.
For this reason, in the present invention, pulverization into ultrafine particles is required, and the concentration of the alkaline reaction accelerator solution is preferably 7% or less in order to obtain the initial effect.
The fine pulverization and the specific surface area of the brane are 4,000 cm 2 / g.
(The particle diameter is about 6 μm or less).
00 ° C) or less.

【0013】その他上記のような超微粉砕のコンクリー
トを舗装等に用いる場合であって、コンクリートを路床
又は床下地部分等に敷設転圧する場合には、硬化前又は
硬化進行初期(数十分位)の段階で転圧コンクリート上
に、200℃前後に加熱された通常のアスファルトコン
クリート積層して敷設転圧すると、その敷設時には概ね
100℃以下に放熱された状態で転圧されることとな
り、コンクリートの早強化及び高強度化がさらに促進さ
れる利点がある。
[0013] In addition, when the above-mentioned ultra-finely pulverized concrete is used for pavement or the like and the concrete is laid on a subgrade or a floor foundation and the like and rolled, the hardening before curing or the early stage of curing (several tens of minutes) At the stage of), normal asphalt concrete heated to around 200 ° C is laminated on the compacted concrete and laid and rolled, and when laid, it will be rolled with heat radiated to approximately 100 ° C or less, There is an advantage that early reinforcement and high strength of concrete are further promoted.

【0014】[0014]

【発明の効果】以上のように構成される本発明のコンク
リート硬化体によれば、各種工事用コンクリート施工、
コンクリート二次製品製造等に際し、コンクリートの極
早期の高強度が発現され、フライアッシュを大量に低コ
ストで有効利用できる。またコンクリートの後期強度も
伸び、乾燥収縮が小さく、水密性、化学抵抗性の高いコ
ンクリートを得ることができる。さらにフライアッシュ
の分級微粒子を用いる場合に比して初期及び後期の硬化
性に優れており、且つ分級の労力及び時間が節約できる
利点がある。
According to the concrete hardened body of the present invention constituted as described above, concrete construction for various works can be performed.
In the production of secondary concrete products, etc., the very high strength of concrete is exhibited at an extremely early stage, and fly ash can be effectively used in large quantities at low cost. In addition, the late strength of the concrete is increased, the drying shrinkage is small, and the concrete having high watertightness and chemical resistance can be obtained. Furthermore, compared with the case where classified fine particles of fly ash are used, there is an advantage that the curability at the initial stage and the late stage is excellent, and labor and time for classification can be saved.

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成11年3月8日[Submission date] March 8, 1999

【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】特許請求の範囲[Correction target item name] Claims

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【特許請求の範囲】[Claims]

【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】0005[Correction target item name] 0005

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0005】[0005]

【課題を解決するための手段】上記問題点を解決するた
めの本発明のコンクリート硬化体は第1に、セメントに
ブレーン比表面積4,000cm2/g以上に超微粉砕
したフライアッシュを添加し、7%以下のアルカリ性反
応促進剤溶液で混練し、成形したことを特徴としてい
る。
In order to solve the above-mentioned problems, a concrete hardened body of the present invention comprises firstly adding fly ash ultrafinely ground to a cement having a specific surface area of 4,000 cm 2 / g or more to cement. , 7% or less alkaline anti
It is characterized by being kneaded with an accelerator solution and molded .

【手続補正3】[Procedure amendment 3]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0006[Correction target item name] 0006

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【0006】第2にセメントにブレーン比表面積4,0
00cm2 /g以上に超微粉砕したフライアッシュを添
加し、7%以下のアルカリ性反応促進剤溶液で混練し、
水の沸点以下の高温で加熱した後加圧成形したことを特
徴としている。
[0006] Second, the cement has a specific surface area of 4.0 to 4.0%.
Add fly ash finely pulverized to more than 00 cm 2 / g
And kneaded with an alkaline reaction accelerator solution of 7% or less,
It is characterized by being heated at a high temperature below the boiling point of water and then molded under pressure.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 セメントにブレーン比表面積4,000
cm2/g以上に超微粉砕したフライアッシュを添加
し、7%以下のアルカリ性反応促進剤溶液で混練し、水
の沸点以下の高温で加熱した後加圧成形した超微粉砕フ
ライアッシュを使用したコンクリート硬化体。
1. A cement having a brane specific surface area of 4,000.
Add ultra-fine pulverized fly ash to a cm 2 / g or more, knead with an alkaline reaction accelerator solution of 7% or less, heat at a high temperature below the boiling point of water, and use pressure-molded ultra-fine pulverized fly ash Hardened concrete.
JP11043856A 1999-02-22 1999-02-22 Concrete hardened body using extremely pulverized fly ash Pending JPH11322399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11043856A JPH11322399A (en) 1999-02-22 1999-02-22 Concrete hardened body using extremely pulverized fly ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11043856A JPH11322399A (en) 1999-02-22 1999-02-22 Concrete hardened body using extremely pulverized fly ash

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP30199495A Division JP3091405B2 (en) 1995-10-25 1995-10-25 Concrete hardened body using ultra-fine pulverized fly ash

Publications (1)

Publication Number Publication Date
JPH11322399A true JPH11322399A (en) 1999-11-24

Family

ID=12675361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11043856A Pending JPH11322399A (en) 1999-02-22 1999-02-22 Concrete hardened body using extremely pulverized fly ash

Country Status (1)

Country Link
JP (1) JPH11322399A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100464819B1 (en) * 2002-02-16 2005-01-06 기초소재 주식회사 An ultra-rapid setting inorganic binder compound based of alkali-activated alumino-silicate
KR100759855B1 (en) 2005-11-01 2007-09-18 요업기술원 Non-plastic inorganic binder using fly ash
JP2012521344A (en) * 2009-03-24 2012-09-13 ラファルジュ Concrete containing low clinker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100464819B1 (en) * 2002-02-16 2005-01-06 기초소재 주식회사 An ultra-rapid setting inorganic binder compound based of alkali-activated alumino-silicate
KR100759855B1 (en) 2005-11-01 2007-09-18 요업기술원 Non-plastic inorganic binder using fly ash
JP2012521344A (en) * 2009-03-24 2012-09-13 ラファルジュ Concrete containing low clinker

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