JPH0712966B2 - Manufacturing method of concrete - Google Patents
Manufacturing method of concreteInfo
- Publication number
- JPH0712966B2 JPH0712966B2 JP59147117A JP14711784A JPH0712966B2 JP H0712966 B2 JPH0712966 B2 JP H0712966B2 JP 59147117 A JP59147117 A JP 59147117A JP 14711784 A JP14711784 A JP 14711784A JP H0712966 B2 JPH0712966 B2 JP H0712966B2
- Authority
- JP
- Japan
- Prior art keywords
- alkali
- concrete
- mortar
- aggregate
- amount
- 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
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はアルカリ骨材反応を防止できるコンクリート及
びモルタルの製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing concrete and mortar capable of preventing alkali-aggregate reaction.
更に詳しくはアルカリとの反応性に富む骨材を使用し、
そのアルカリ骨材反応を抑制するためにポゾラン質混和
材を添加したコンクリート及びモルタルの製造に際し，
芳香族スルホン酸ホルマリン縮合物のアルカリ土類金属
塩を分散剤として使用することにより、アルカリ骨材反
応を防止できるコンクリート及びモルタルの製造法に関
するものである。More specifically, we use aggregate with high reactivity with alkali,
In the production of concrete and mortar containing pozzolanic admixture to suppress the alkaline-aggregate reaction,
The present invention relates to a method for producing concrete and mortar which can prevent an alkaline aggregate reaction by using an alkaline earth metal salt of an aromatic sulfonic acid formalin condensate as a dispersant.
一般にアルカリとの反応性に富む骨材を使用したコンク
リート及びモルタルが、異常膨張によるひび割れ等の劣
化損傷を起こし重大な問題となつてきている。In general, concrete and mortar using aggregates that are highly reactive with alkali have become a serious problem due to deterioration damage such as cracking due to abnormal expansion.
そのアルカリ骨材反応を誘因する一因子として、コンク
リート及びモルタル中に含有されるアルカリ量と相関が
あると考えられ、セメント中のNa2O量や骨材中のNaCl量
を低減すべく規制化されている。そして、その抑制方法
としてフライアツシユ等のポゾラン質混和材を添加する
ことにより、アルカリの作用を軽減させる方法が知られ
ている。As one factor inducing the alkaline-aggregate reaction, it is considered that there is a correlation with the amount of alkali contained in concrete and mortar, and regulation was made to reduce the amount of Na 2 O in cement and the amount of NaCl in aggregate. Has been done. Then, as a method for suppressing this, there is known a method of reducing the action of alkali by adding a pozzolanic admixture such as fly ash.
又コンクリート及びモルタルの製造に際し、単位水量を
減じ、所定のコンシステンシー及び高弾度を得るため
に、セメント分散剤の使用が常法とされている。Further, in the production of concrete and mortar, the use of cement dispersants is commonly used in order to reduce the amount of unit water and obtain a predetermined consistency and high elasticity.
併しながら従来セメント分散剤はナトリウム塩等のアル
カリ金属塩が一般的であり、それを使用した際、そのア
ルカリ金属量がアルカリ骨材反応に及ぼす影響が無視で
きない場合もあると考えられる。On the other hand, the conventional cement dispersant is generally an alkali metal salt such as sodium salt, and when it is used, the influence of the amount of the alkali metal on the alkali-aggregate reaction may not be ignored.
そこで本発明者らは鋭意研究の結果、アルカリとの反応
性に富む骨材を使用し、そのアルカリ骨材反応を抑制す
るためにポゾラン質混和材を添加したコンクリート及び
モルタルの製造に際し、芳香族スルホン酸ホルマリン縮
合物を分散剤として使用する場合において、従来のナト
リウム塩等のアルカリ金属塩に代えてアルカリ土類金属
塩を使用すれば、アルカリ骨材反応を顕著に防止できる
ことを確認し、本発明を完成するに到つた。Therefore, as a result of intensive research, the present inventors have used an aggregate highly reactive with alkali, and in the production of concrete and mortar in which a pozzolanic admixture is added to suppress the alkali-aggregate reaction, aromatics are used. When using a sulfonic acid formalin condensate as a dispersant, it was confirmed that if an alkaline earth metal salt was used in place of the conventional alkali metal salt such as sodium salt, the alkaline aggregate reaction could be significantly prevented, and The invention was completed.
即ち本発明はアルカリとの反応性に富む骨材を使用し、
そのアルカリ骨材反応を抑制するためにポゾラン質混和
材を添加したコンクリート及びモルタルの製造に際し、
芳香族スルホン酸ホルマリン縮合物のアルカリ土類金属
塩を分散剤として使用することを特徴とするコンクリー
ト及びモルタルの製造法に関するものである。That is, the present invention uses an aggregate rich in reactivity with alkali,
In the production of concrete and mortar to which a pozzolanic admixture was added to suppress the alkali-aggregate reaction,
The present invention relates to a method for producing concrete and mortar, which comprises using an alkaline earth metal salt of a formalin aromatic sulfonate condensate as a dispersant.
本発明で使用される骨材は、たんぱく石、玉髄、輝石安
山岩等のアルカリとの反応性に富む骨材であり、ASTMC-
289骨材の潜在反応性試験法により、その結果が有害も
しくは潜在的に有害であると判定されたものである。The aggregate used in the present invention is an aggregate highly reactive with alkali such as protein stone, chalcedony and pyroxene andesite.
289 The result of the latent reactivity test method of aggregate was judged to be harmful or potentially harmful.
ポゾラン質混和材としては、ケイ酸白土や火山灰等の天
然ポゾラン及びフライアツシユ、高炉スラグやシリカヒ
ユーム等の人工ポゾランが使用できる。As the pozzolanic admixtures, natural pozzolans such as silicate clay and volcanic ash, fly ashes, artificial pozzolans such as blast furnace slag and silica hyme can be used.
分散剤は芳香族スルホン酸ホルマリン縮合物のアルカリ
土類金属塩であり、芳香族スルホン酸としてナフタリン
スルホン酸を使用する場合が特に好ましいが、アルキル
ナフタリンスルホン酸又はリグニンスルホン酸にも適用
でき、ホルマリン縮合物として上記スルホン酸の単独及
び共縮合物である。又、アルカリ土類金属塩はカルシウ
ム塩が特に好ましいが、マグネシウム塩等にも適用でき
る。The dispersant is an alkaline earth metal salt of an aromatic sulfonic acid formalin condensate, and it is particularly preferable to use naphthalenesulfonic acid as the aromatic sulfonic acid, but it is also applicable to alkylnaphthalenesulfonic acid or ligninsulfonic acid, and formalin. As the condensate, there are homo- and co-condensates of the above sulfonic acids. Further, the alkaline earth metal salt is particularly preferably a calcium salt, but may be applied to a magnesium salt or the like.
アルカリ量は特に範囲を定めないが、アルカリ骨材反応
が一般に起こるとされている量、即ちセメント中のNa2O
量として0.6％以上、又はコンクリート及びモルタル中
のNa2O量として3Kg/m3以上の時に本発明は特に有効であ
る。The amount of alkali is not particularly limited, but the amount that alkali-aggregate reaction is generally considered to occur, that is, Na 2 O in cement
The present invention is particularly effective when the amount is 0.6% or more, or when the amount of Na 2 O in concrete and mortar is 3 Kg / m 3 or more.
次に本発明の実施例を挙げて説明するが、本発明はこれ
に限定されるものではない。Next, examples of the present invention will be described, but the present invention is not limited thereto.
実施例 表‐１に示した材料と調合条件でASTM-C227に準じて、
モルタルバー試験を行つた。Example According to ASTM-C227 with the materials and compounding conditions shown in Table-1,
A mortar bar test was conducted.
モルタルバーの膨張量の結果を表‐２に示した。明らか
に本発明品は比較例に比べて膨張量が小さいことが判
る。 The results of the expansion amount of the mortar bar are shown in Table-2. It is apparent that the product of the present invention has a smaller expansion amount than the comparative example.
フロントページの続き (56)参考文献 特開 昭51−119031（ＪＰ，Ａ) 特開 昭55−71656（ＪＰ，Ａ) 特開 昭58−125652（ＪＰ，Ａ) 特開 昭53−8617（ＪＰ，Ａ) 特公 昭43−11783（ＪＰ，Ｂ１) 特公 昭57−54460（ＪＰ，Ｂ２)Continuation of the front page (56) Reference JP-A-51-119031 (JP, A) JP-A-55-71656 (JP, A) JP-A-58-125652 (JP, A) JP-A-53-8617 (JP , A) JP-B 43-11783 (JP, B1) JP-B 57-54460 (JP, B2)
Claims (1)
そのアルカリ骨材反応を抑制するためにポゾラン質混和
材を添加したコンクリート及びモルタルの製造に際し、
芳香族スルホン酸ホルマリン縮合物のアルカリ土類金属
塩を分散剤として使用することを特徴とするコンクリー
ト及びモルタルの製造法。1. An aggregate which is highly reactive with alkali is used,
In the production of concrete and mortar to which a pozzolanic admixture was added to suppress the alkali-aggregate reaction,
A method for producing concrete and mortar, which comprises using an alkaline earth metal salt of an aromatic sulfonic acid formalin condensate as a dispersant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59147117A JPH0712966B2 (en) | 1984-07-16 | 1984-07-16 | Manufacturing method of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59147117A JPH0712966B2 (en) | 1984-07-16 | 1984-07-16 | Manufacturing method of concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6126546A JPS6126546A (en) | 1986-02-05 |
| JPH0712966B2 true JPH0712966B2 (en) | 1995-02-15 |
Family
ID=15422910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59147117A Expired - Lifetime JPH0712966B2 (en) | 1984-07-16 | 1984-07-16 | Manufacturing method of concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712966B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0613422B2 (en) * | 1984-10-30 | 1994-02-23 | 日本セメント株式会社 | Method for improving the properties of cement mortar and concrete |
| JPH0678183B2 (en) * | 1985-11-27 | 1994-10-05 | 大阪セメント株式会社 | Admixture for suppressing alkaline aggregate reaction |
| US4861378A (en) * | 1987-03-13 | 1989-08-29 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement additive containing superplasticizer and bentonite |
| JPH0679973B2 (en) * | 1987-06-22 | 1994-10-12 | 鹿島建設株式会社 | Concrete deterioration prevention method by ASR |
| JPH0717429B2 (en) * | 1989-03-27 | 1995-03-01 | 株式会社大林組 | Cement mortar and admixture for producing cement mortar |
| JPH0819808B2 (en) * | 1989-04-03 | 1996-02-28 | 株式会社ムラコシ精工 | Folding device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2303771A1 (en) * | 1975-03-11 | 1976-10-08 | Rhone Poulenc Ind | NEW ALUMINO-CALCIUM COMPOUNDS AND THEIR APPLICATIONS TO HYDRAULIC BINDERS |
| RO72773B (en) * | 1976-07-09 | 1984-03-31 | Aksjeselskapet Norcem | Process for preparing non-corrodible concrete compositions |
| JPS5571656A (en) * | 1978-11-17 | 1980-05-29 | Sanyo Chemical Ind Ltd | Cement dispersing agent |
| JPS5754460A (en) * | 1980-09-17 | 1982-03-31 | Fujitsu Ltd | Detecting and processing system for failure subscriber line |
| JPS58125652A (en) * | 1982-01-21 | 1983-07-26 | 鹿島建設株式会社 | Granular concrete mixing agent |
-
1984
- 1984-07-16 JP JP59147117A patent/JPH0712966B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6126546A (en) | 1986-02-05 |
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