JPH09118556A - Concrete hardener body using superfine-pulverized fly ash - Google Patents
Concrete hardener body using superfine-pulverized fly ashInfo
- Publication number
- JPH09118556A JPH09118556A JP30199495A JP30199495A JPH09118556A JP H09118556 A JPH09118556 A JP H09118556A JP 30199495 A JP30199495 A JP 30199495A JP 30199495 A JP30199495 A JP 30199495A JP H09118556 A JPH09118556 A JP H09118556A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- fly ash
- strength
- pulverized
- superfine
- 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
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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【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 product using ultrafine pulverized fly ash, which is suitable for pavement for road surface or floor surface, secondary concrete product, etc. .
【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。Conventionally, concrete using cement mixed with fly ash has been developed for the purpose of effectively utilizing fly ash which is industrial waste. Since mixed concrete develops initial strength slowly, it is not used for concrete and secondary concrete products that require early strength. In addition, because the outer shape of fly ash is spherical,
Often used to increase flowability, no consideration was given to micronization that disrupts the spherical profile.
【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。Next, the conventional compacted concrete is required to exhibit extremely early strength after construction. Therefore, although super-compacted ordinary Portland cement having a low water cement ratio is constructed by compaction, the initial strength development is slow. The use of fly ash cement was problematic. 3 fly ash when used
It is 0% or less, the initial strength is low, and it is 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。The present invention solves the problem of strength development in the very early stage of concrete which uses a large amount of fly ash, and also provides concrete having high water-tightness and high chemical resistance, which has an increased late strength, a small drying shrinkage. To aim.
Especially, it is intended to be applied to compacted concrete and materials for secondary concrete products which require 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、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 problems, the first concrete hardened material of the present invention is the addition of fly ash which has been finely ground to a Blaine specific surface area of 4,000 cm 2 / g or more. It has a feature.
【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且つ加圧した
ことを特徴としている。Secondly, it is characterized in that it is kneaded with an alkaline reaction accelerator solution of 7% or less, heated and pressurized at a high temperature below the boiling point of water.
【0007】第3に路床又は床下地面上にコンクリート
を敷設転圧し、硬化前又は硬化進行開始直後の該コンク
リート上に加熱されたアスファルトコンクリートを敷設
転圧してなることを特徴としている。Thirdly, the present invention is characterized in that concrete is laid and compacted on the subgrade or floor surface, and heated asphalt concrete is laid and compacted on the concrete before hardening or immediately after the start of hardening progress.
【0008】[0008]
【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。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, fly ash, which is usually used without fine pulverization, is ultra finely pulverized, and an alkaline solution is mixed without using water, and then heated and pressurized. It is characterized by being made, and is a method for accelerating the hydration reaction of fly ash, that is, ultrafine pulverization, use of an alkaline solution as a reaction accelerator, heating, pressurization (rolling pressure), etc. The method is applied comprehensively in an optimal manner.
【0009】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5
cm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/cm
2,材令3日は302kgf/cm2のものが得られ
た。The embodiment will be described in detail below. An ordinary fly ash is prepared by using a Blaine specific surface area of 4,000.
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 and height 5
A column of cm was formed under pressure of 100 kgf / cm 2 , and thereafter, it was cured at room temperature and in a humid atmosphere for 1 day and 3 days, respectively. As a result, the compressive strength of this sample was 219 kgf / cm for one day.
2 , the material of 302 kgf / cm 2 was obtained for 3 days.
【0010】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/cm
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 unground fly ash, 40 parts of cement and 180 parts of sand were kneaded with 180 parts of water, the 1-day strength was 25 kgf / cm 2 . Age 3 days strength is 51kgf / cm
2 , the strength of 7 days old was 73 kgf / cm 2 . Also, the strength of the mortar containing 20% of the classified fly ash that has almost the same particles as that of ultra-fine crushing is 142k for 3 days.
It is gf / cm 2 , and when the amount of fly ash mixed is small, the strength of the classified fly ash also increases. From these facts, it is possible to clearly discriminate the difference between high strengthening and early strengthening when using ordinary spherical fly ash or unpulverized classified fine fly ash and when using the same amount of ultrafine pulverized fly ash. .
【0011】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。By the way, since the ordinary Portland cement using 100 parts of cement has a weight of about 150 kgf / cm 2 , it is clear that the strength and the early strengthening property are particularly excellent as compared with this. Examples of the alkaline reaction promoter include sodium sulfate solution, NaOH, K
It is possible to use OH, K 2 SO 4, etc.
【0012】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
であった。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/c
m2,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 above except that the amount of fly ash was increased and 80 parts of ultrafine pulverized fly ash, 20 parts of cement and others were found to have a strength of 126 days per day.
kgf / cm 2 , age 3 days strength is 216 kgf / cm 2.
Met. By the way, if normal uncrushed fly ash with the same composition is used, it will be 10 to 15 kgf / c in 1 day of age.
m 2 and 30 kgf / cm 2 on the same 3 days, and it is recognized that a sufficiently high strength can be realized compared to the above-mentioned one using 100 parts of ordinary Portland cement.
【0013】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 clear from the above embodiment, fly ash is effective only when the amount of the usual spherical classified fine particles that have been burned and discarded is limited.
Therefore, in the present invention, the condition is that the particles are pulverized into ultrafine particles, and the concentration of the alkaline reaction accelerator solution is also preferably 7% or less in order to obtain the initial effect.
Also finely pulverized and has a Blaine specific surface area of 4,000 cm 2 / g
It is desirable that the particle size be above (particle size of about 6 μm or less), and the temperature at the time of heating should be the boiling point of water (about 1 μm) in order to obtain the reaction promoting effect.
00 ° C) or lower is preferable.
【0014】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。In addition, when the above-mentioned ultra-finely crushed concrete is used for pavement or the like and the concrete is laid on a roadbed or a floor substratum, etc. When laying and rolling the ordinary asphalt concrete that has been heated to around 200 ° C on the compacted concrete at the stage of laying and rolling, it will be rolled while being radiated to approximately 100 ° C or less during the laying, There is an advantage that the early strengthening and high strength of concrete are further promoted.
【0015】[0015]
【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。EFFECTS OF THE INVENTION According to the hardened concrete of the present invention configured as described above, concrete construction for various works,
In the production of secondary concrete products, the very high strength of concrete can be exhibited at an extremely early stage, and a large amount of fly ash can be effectively used at low cost. Further, it is possible to obtain a concrete having a high strength in the latter stage of the concrete, a small drying shrinkage, a high watertightness and a high chemical resistance. Further, compared with the case where fine particles of fly ash are used, the curability in the early and late stages is excellent, and the labor and time for classification can be saved.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 //(C04B 28/02 18:08 22:14) 103:10 111:20 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area // (C04B 28/02 18:08 22:14) 103: 10 111: 20
Claims (3)
以上に超微粉砕したフライアッシュを添加した超微粉砕
フライアッシュを使用したコンクリート硬化体。1. A Blaine specific surface area of 4,000 cm 2 / g
A concrete hardened body using ultrafine pulverized fly ash to which the fly ash that has been ultrafine pulverized is added.
混練し、水の沸点以下の高温で加熱し且つ加圧した請求
項1の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。2. A concrete hardened product using the ultrafine pulverized fly ash according to claim 1, which is kneaded with an alkaline reaction accelerator solution of 7% or less, heated at a temperature not higher than the boiling point of water, and pressurized.
設転圧し、硬化前又は硬化進行開始直後の該コンクリー
ト上に加熱されたアスファルトコンクリートを敷設転圧
してなる請求項1又は2の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。3. The ultrafine pulverization according to claim 1 or 2, wherein concrete is laid and rolled on a subgrade or floor surface, and heated asphalt concrete is laid and compacted on the concrete before hardening or immediately after hardening starts. Hardened concrete using fly ash.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30199495A JP3091405B2 (en) | 1995-10-25 | 1995-10-25 | Concrete hardened body using ultra-fine pulverized fly ash |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30199495A JP3091405B2 (en) | 1995-10-25 | 1995-10-25 | Concrete hardened body using ultra-fine pulverized fly ash |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11043856A Division JPH11322399A (en) | 1999-02-22 | 1999-02-22 | Concrete hardened body using extremely pulverized fly ash |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09118556A true JPH09118556A (en) | 1997-05-06 |
JP3091405B2 JP3091405B2 (en) | 2000-09-25 |
Family
ID=17903610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30199495A Expired - Fee Related JP3091405B2 (en) | 1995-10-25 | 1995-10-25 | Concrete hardened body using ultra-fine pulverized fly ash |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3091405B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006505480A (en) * | 2002-11-07 | 2006-02-16 | プロシード エンタープライズ エタブリスマン | How to treat fly ash |
JP2019052523A (en) * | 2017-09-14 | 2019-04-04 | 太平洋セメント株式会社 | Concrete pavement and concrete pavement construction method |
JP2019059643A (en) * | 2017-09-26 | 2019-04-18 | 太平洋セメント株式会社 | Method for producing fly ash for admixture |
KR20200048444A (en) | 2018-10-30 | 2020-05-08 | 가천대학교 산학협력단 | High volume fly ash binder for compressive strength improvement |
-
1995
- 1995-10-25 JP JP30199495A patent/JP3091405B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006505480A (en) * | 2002-11-07 | 2006-02-16 | プロシード エンタープライズ エタブリスマン | How to treat fly ash |
JP2010254575A (en) * | 2002-11-07 | 2010-11-11 | Procedo Enterprises Etablissement | Method for treatment of fly ash |
JP2019052523A (en) * | 2017-09-14 | 2019-04-04 | 太平洋セメント株式会社 | Concrete pavement and concrete pavement construction method |
JP2019059643A (en) * | 2017-09-26 | 2019-04-18 | 太平洋セメント株式会社 | Method for producing fly ash for admixture |
KR20200048444A (en) | 2018-10-30 | 2020-05-08 | 가천대학교 산학협력단 | High volume fly ash binder for compressive strength improvement |
Also Published As
Publication number | Publication date |
---|---|
JP3091405B2 (en) | 2000-09-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Kuo et al. | Engineering properties of alkali-activated binders by use of desulfurization slag and GGBFS | |
US2937581A (en) | Road building method | |
JP3555987B2 (en) | Recyclable concrete, mortar and recycling method | |
JP3761996B2 (en) | Method for producing recycled cement and recycled cement | |
JPH09118556A (en) | Concrete hardener body using superfine-pulverized fly ash | |
KR101612742B1 (en) | Quick-setting composition for paving soil and method for paving soil road by using the same | |
JP3072423B2 (en) | Manufacturing method of high-strength artificial aggregate | |
JPH11322399A (en) | Concrete hardened body using extremely pulverized fly ash | |
JP3407161B2 (en) | Method for producing hardened recyclable cement using clinker as aggregate | |
JPH0826794A (en) | Production of cement | |
JP3366451B2 (en) | Concrete production method | |
KR101366062B1 (en) | Concrete composition for bridge pavement and manufacturing method thereof | |
JP3305414B2 (en) | How to use demolition concrete waste | |
JPH0393657A (en) | Hydraulic paving material | |
JP2002018411A (en) | Method for solidifying and molding ash | |
Alexander et al. | Relative stabilizing effect of various limes on clayey soils | |
JPH06287555A (en) | Solidifier for organic soft ground | |
JPH0354137A (en) | Reuse of concrete taken to piece | |
JP3196610B2 (en) | Gravel-shaped hardened body | |
JP2001019529A (en) | Cement hardened product | |
JP2853087B1 (en) | Reinforced cement composition | |
JPH0680449A (en) | Production of concrete product having abrasion resistance and ultrahigh strength | |
JPH0542384B2 (en) | ||
JPS61270240A (en) | Manufacture of hydraulic material | |
JPH0510159B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |