JPS63252948A - Alkali aggregate reaction inhibitor - Google Patents
Alkali aggregate reaction inhibitorInfo
- Publication number
- JPS63252948A JPS63252948A JP62083895A JP8389587A JPS63252948A JP S63252948 A JPS63252948 A JP S63252948A JP 62083895 A JP62083895 A JP 62083895A JP 8389587 A JP8389587 A JP 8389587A JP S63252948 A JPS63252948 A JP S63252948A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- aggregate
- concrete
- aggregate reaction
- present
- 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
- 239000003513 alkali Substances 0.000 title description 10
- 239000002683 reaction inhibitor Substances 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 239000002893 slag Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000011400 blast furnace cement Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011022 opal Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910021493 α-cristobalite Inorganic materials 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 229910001683 gmelinite Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000003823 mortar mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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起し易い反応性骨材、あ
るいはアルカリ成分が多いセメント又は混和剤を含有し
たコンクリートのアルカリ骨材反応抑制材に関するもの
である。Detailed Description of the Invention [Industrial Application Field] The present invention is directed to suppressing the alkaline aggregate reaction of concrete containing reactive aggregates that easily cause alkaline aggregate reactions, or cement or admixtures with a high alkali content. It is related to materials.
近年、土木建築分野におけるコンクリート施工において
、セメント等に含有されるアルカリ成分と骨材の反応（
アルカリ骨材反応）がクローズアップされている。In recent years, in concrete construction in the civil engineering and construction field, the reaction between the alkaline components contained in cement etc. and aggregate (
Alkaline aggregate reaction) has been highlighted.
このアルカリ骨材反応とは骨材中の特殊な反応性鉱物、
例えばα−クリストバライト等と、セメントや海砂に含
有されたり、海水や凍結防止剤等の混和剤など外部から
侵入するナトリウム（Ｎａ）やカリウム（Ｋ）等のアル
カリとが、ある条件下で反応し、コンクリートに膨張ひ
びゎれを持たらす現象であり、一般に反応性シリカ質が
主因であるため、アルカリ−シリカ反応とも考えられる
。This alkaline aggregate reaction is caused by special reactive minerals in the aggregate.
For example, under certain conditions, α-cristobalite, etc., reacts with alkalis, such as sodium (Na) and potassium (K), which are contained in cement or sea sand, or which enter from outside, such as seawater or admixtures such as antifreeze agents. However, this is a phenomenon that causes expansion cracks in concrete, and since reactive silica is generally the main cause, it is also considered to be an alkali-silica reaction.
このアルカリ骨材反応により、珪酸ゲルが生成し、膨潤
することにより、コンクリートにひびゎれが発生し、耐
久性の面で大きな問題となっている。Due to this alkaline aggregate reaction, silicic acid gel is generated and swells, causing cracks in concrete, which poses a major problem in terms of durability.
建設省のコンクＵ −トのアルカリ骨材反応への暫定対
策の骨子は次の４つからなっている。The Ministry of Construction's provisional countermeasures against alkaline aggregate reactions in concrete consist of the following four points.
■低アルカリ形セメントを使用する。■Use low-alkali type cement.
■アルカリ骨材反応抑制効果のある混合セメント等を使
用する。■Use mixed cement that has the effect of suppressing alkali aggregate reaction.
■アルカリ骨材反応の面で安全と認められる骨材を使用
する。■Use aggregates that are recognized as safe in terms of alkaline aggregate reaction.
■コンクリート中のアルカリ総量をＮａ２Ｏ換算で６．
０ ｋｌｌ ／ ａｎ３以下に制限する。■Total amount of alkali in concrete converted to Na2O 6.
Limit to 0 kll/an3 or less.
又、アルカリ骨材反応はコンクリートの細孔に存在する
溶液組成、特にアルカリ濃度に関係してオシ、高炉水砕
スラグはアルカリを固定し、グメリナイトといわれるア
ルミニウム°シリケートーソーダ水和物を生成すること
により、細孔の溶液中のアルカリ濃度を低減し、アルカ
リ骨材反応を抑制することが知られている。In addition, the alkaline aggregate reaction is related to the composition of the solution present in the pores of concrete, especially the alkali concentration, and granulated blast furnace slag fixes alkali, producing an aluminum silicate-soda hydrate called gmelinite. It is known that this reduces the alkali concentration in the solution in the pores and suppresses the alkaline aggregate reaction.
更に、反応性骨材を微粉末にして添加する方法も提案さ
れている（特開昭６１−１０６４４９号公報）。しかし
ながら、本方法では適用範囲が限定され、充分な効果が
得られなかった。Furthermore, a method has also been proposed in which reactive aggregate is added in the form of fine powder (Japanese Patent Application Laid-open No. 106449/1983). However, the scope of application of this method was limited and sufficient effects could not be obtained.
本発明者らは、上記問題点を解決する目的で植種検討し
た結果、混合セメントあるいは普通ポルトランドセメン
トに添加する混和材として用いる高炉水砕スラグの組成
をコントロールすることにより、アルカリ骨材反応を抑
制でき、耐久性が向上できる知見を得て本発明を完成す
るに到った。As a result of seed planting studies aimed at solving the above problems, the present inventors found that by controlling the composition of granulated blast furnace slag, which is used as an admixture to mixed cement or ordinary Portland cement, the alkaline aggregate reaction can be improved. The present invention has been completed based on the knowledge that this can be suppressed and durability can be improved.
即ち、本発明は、Ａｔ２０３含有率が１２重量％以下で
ある高炉水砕スラグを用いることを特徴とするコンクリ
ートのアルカリ骨材反応抑制材である。That is, the present invention is an alkaline aggregate reaction suppressing material for concrete, which is characterized by using granulated blast furnace slag having an At203 content of 12% by weight or less.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に係るコンクリートは特に限定されるものではな
いが、反応性骨材、特にアルカリ成分の含有率が多い反
応性骨材を使用するコンクリート工
には、本発明の“アルカリ骨反応抑制材（以下抑制材と
いう）は有効である。Although the concrete according to the present invention is not particularly limited, the "alkali bone reaction suppressing material" of the present invention is suitable for concrete work using reactive aggregate, especially reactive aggregate with a high content of alkaline components. (hereinafter referred to as suppressor) is effective.
本発明に係るセメントとしては、普通・早強・超早強等
各種ポルトランドセメント、高炉セメント・フライアッ
シュセメントφシリカセメントの混合セメント及びポル
トランドセメントを含まないスラグセメント等が挙げら
れる。Examples of the cement according to the present invention include various Portland cements such as normal, early strength, and super early strength, mixed cements of blast furnace cement, fly ash cement, φ silica cement, and slag cement that does not contain Portland cement.
又、本発明に係る骨材としては、コンクリートなどに使
用される骨材であれば特に限定されるものではないが、
反応性の低い骨材を使用することはより好ましい。In addition, the aggregate according to the present invention is not particularly limited as long as it is an aggregate used for concrete etc.
It is more preferable to use aggregates with low reactivity.
高炉水砕スラグとは、冶金あるいは金属製練等において
副生ずるもので、高炉水砕スラグ（以下単にスラグとい
う）の活性度（水硬性指数）は通常ＣａＯ成分（Ｃ）
ｔ ＭｇＯ成分（Ｍ）及びＡｔ２０３ （Ａ）成分の合
計量に対する５１０２成分（Ｓ）の割合で示され、塩基
度＝ （Ｃ＋Ｍ＋Ａ） ／ Ｓとして表わされる。高炉
セメントに使用される高炉水砕スラグの塩基度は、ｒｒ
ｓＲ５２１１で１．４以上と規定されている。Granulated blast furnace slag is a by-product of metallurgy or metal smelting, and the activity (hydraulic index) of granulated blast furnace slag (hereinafter simply referred to as slag) is usually due to the CaO component (C).
t It is expressed as the ratio of the 5102 component (S) to the total amount of the MgO component (M) and the At203 (A) component, and is expressed as basicity = (C+M+A)/S. The basicity of granulated blast furnace slag used for blast furnace cement is rr
It is defined as 1.4 or more in sR5211.
又、スラグの平均的な化学組成は、Ｃ：４０〜４６重ｔ
％２Ｍ：５〜８重量％？Ａ：１３〜１５重ｆｉ％及びＳ
：６１〜６５重量％である。In addition, the average chemical composition of slag is C: 40 to 46 weight tons.
%2M: 5-8% by weight? A: 13-15 weight fi% and S
:61 to 65% by weight.
現在日本で製造されているスラグのＡ含有率はほとんど
１４重ｉｋｓ以上である。The A content of most of the slags currently manufactured in Japan is 14 iks or more.
本発明に係るスラグは、Ａ含有率が１２重ｆ％以下のも
のである。Ａ含有率が１２重量％以下のスラグは、Ｃ＠
ｊ、Ｍ源、Ａ源、Ｓ源等をＡ源が１２重量％以下となる
よう混合して製造できる。The slag according to the present invention has an A content of 12% by weight or less. Slag with an A content of 12% by weight or less is C@
It can be produced by mixing J, M source, A source, S source, etc. such that the A source is 12% by weight or less.
本発明に係るスラグの使用量はセメント１００重量部に
対し２０重量部以上が好ましく、５０重量部以上が更に
好ましい。The amount of slag used in the present invention is preferably 20 parts by weight or more, more preferably 50 parts by weight or more, based on 100 parts by weight of cement.
２０重量部未満では、効果が低く多いほど好ましい。If it is less than 20 parts by weight, the effect will be low, so the more it is, the better.
アルカリ骨材反応（以下アル骨反応という）を判定する
試験方法としては、骨材の反応性を調べるＡＳＴＭＣ−
２８９の化学法とモルタルの膨張率を測定するＡ８ＴＭ
Ｃ−２２７のモルタルパー法がある。The test method for determining alkaline aggregate reaction (hereinafter referred to as alkaline bone reaction) is ASTM-
289 chemical method and A8TM to measure the expansion rate of mortar
There is a mortar par method for C-227.
本発明の抑制材の混合方法は、特に限定されるものでは
なく、又、コンクリートに通常使用される種々の混和剤
を併用することももちろん可能である。The method of mixing the inhibitor of the present invention is not particularly limited, and it is of course possible to use various admixtures commonly used in concrete.
以下実施例を挙げて本発明を更に説明する。 The present invention will be further explained below with reference to Examples.
実施例
反応性骨材のオパール珪石（α−クリストバライト系）
（以下オパールという）及び、ＡＳＴＭＣ−２８９化学
法によシ無害と判定された川砂を表−１の粒度分布のよ
うに粉砕、ふるい分けを行い表−２の割合で混合した。Example reactive aggregate opal silica (α-cristobalite type)
(hereinafter referred to as opal) and river sand, which was determined to be harmless according to the ASTM C-289 chemical method, were crushed and sieved according to the particle size distribution shown in Table 1, and mixed in the proportions shown in Table 2.
表−’ｌ （ｗｔ％）
使用したスラグの化学組成を表−３、特性を表−４に示
す。Table-'l (wt%) The chemical composition of the slag used is shown in Table-3, and the characteristics are shown in Table-4.
表−４
次にコンクリートの耐久性の促進効果をみるため次の試
験を実施した。試験に用いた、セメント組成を表−５に
示す。Table 4 Next, the following test was conducted to see the effect of promoting concrete durability. Table 5 shows the cement composition used in the test.
表−５ （重量部） ゑ のモルタルパー法に準て行った。Table-5 (parts by weight) E It was carried out according to the mortar par method.
（１） モルタル供試体の作製
■モルタルの混線
セメント及び骨材を１：２になるようモルタルミキサー
に投入し、フロー値が２００±１Ｏｎに入るように混練
水を調整しながら低速で６０秒、高速で１分間混練した
。(1) Preparation of mortar specimen ■Mortar mixing Cement and aggregate were put into a mortar mixer at a ratio of 1:2, and mixed at low speed for 60 seconds while adjusting the mixing water so that the flow value was 200 ± 1 On. The mixture was kneaded at high speed for 1 minute.
■モルタル供試体の作製
モルタル混練後直ちに型枠（ＪＩＳ規格４Ｘ４×１６ｃ
ｒＩＬ）に投入した。また膨張率測定用のボルト；供試
晶め込みを行った。■ Preparation of mortar specimen Immediately after mixing the mortar, formwork (JIS standard 4x4x16c)
rIL). In addition, a bolt for measuring the expansion coefficient; a sample crystal was inserted.
（２）養生方法
■モルタル成型後２０°Ｃ１９０Ｓ Ｒ，Ｈ，以上で２
４±２時間養生
■脱型後基長（ダイヤルデージ法）。(2) Curing method ■ After mortar molding, 20°C 190S R, H, 2 or more
Curing for 4±2 hours ■ Base length after demolding (dialage method).
０４０℃、９０％Ｒ，Ｈ，以上で所定材令まで養生。Cured at 040°C, 90% R, H or above until the specified material age.
■測定前には１６時間以上２０″Ｃ１９０％Ｒ，Ｈ。■ 20″C190%R,H for more than 16 hours before measurement.
以上の状態に置く。Put it in the above condition.
■測長はダイヤルデージを使用
■測定後は４０’Ｃ１９０Ｓ Ｒ，Ｈ，以上の状態に戻
す。■Use a dial dage to measure length.■After measurement, return to 40'C190S R, H, or higher condition.
測定結果を我−５に示す。The measurement results are shown in Ga-5.
表−５
比較例である実験屑１，２においては１ケ月材令前に膨
張によるクラックの発生が認められたが、実施例である
実験７ｇ６３，４．５では観察されなかった。本発明に
よる実施例の膨張量は比較例と比べ著しく少ないことが
わかった。Table 5 In Experiment Scraps 1 and 2, which are comparative examples, cracks due to expansion were observed before one month of age, but were not observed in Experiment 7g63 and 4.5, which are examples. It was found that the amount of expansion of the examples according to the present invention was significantly smaller than that of the comparative examples.
以上の如く、本発明の抑制材を用いるとアルカリ含有量
が数チと極端に多く、反応性骨材を含むコンクリートに
おいてアル骨反応による膨張はほとんど無く、コンクリ
ートの耐久性を向上させることができる。従って、これ
まで慎重な対策を必要とした条件でも本発明によればス
ラグの組成を特定化することによシ容易に対応すること
が可能となった。As described above, when the suppressing material of the present invention is used, the alkali content is extremely high at several trillion, and in concrete containing reactive aggregate, there is almost no expansion due to the alkali-bone reaction, and the durability of the concrete can be improved. . Therefore, according to the present invention, it is now possible to easily deal with conditions that have hitherto required careful measures by specifying the composition of the slag.
Claims (1)
炉水砕スラグを用いることを特徴とするコンクリートの
アルカリ骨材反応抑制材。(1) An alkaline aggregate reaction suppressing material for concrete, characterized by using granulated blast furnace slag having an Al_2O_3 content of 12% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8389587A JP2503226B2 (en) | 1987-04-07 | 1987-04-07 | Alkali aggregate reaction inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8389587A JP2503226B2 (en) | 1987-04-07 | 1987-04-07 | Alkali aggregate reaction inhibitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63252948A true JPS63252948A (en) | 1988-10-20 |
| JP2503226B2 JP2503226B2 (en) | 1996-06-05 |
Family
ID=13815367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8389587A Expired - Lifetime JP2503226B2 (en) | 1987-04-07 | 1987-04-07 | Alkali aggregate reaction inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2503226B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006168997A (en) * | 2003-11-20 | 2006-06-29 | Mitani Sekisan Co Ltd | High-strength concrete-molded body and material to be charged in mold |
| JP2007031174A (en) * | 2005-07-22 | 2007-02-08 | Ube Ind Ltd | Cement composition for alkali-silica reaction suppression and cement-containing composition |
| JP2008179510A (en) * | 2007-01-24 | 2008-08-07 | Taiheiyo Cement Corp | Cement additive and cement composition |
| JP2016216343A (en) * | 2015-05-18 | 2016-12-22 | 宇部興産株式会社 | Cement composition and manufacturing method therefor |
-
1987
- 1987-04-07 JP JP8389587A patent/JP2503226B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006168997A (en) * | 2003-11-20 | 2006-06-29 | Mitani Sekisan Co Ltd | High-strength concrete-molded body and material to be charged in mold |
| JP2007031174A (en) * | 2005-07-22 | 2007-02-08 | Ube Ind Ltd | Cement composition for alkali-silica reaction suppression and cement-containing composition |
| JP2008179510A (en) * | 2007-01-24 | 2008-08-07 | Taiheiyo Cement Corp | Cement additive and cement composition |
| JP2016216343A (en) * | 2015-05-18 | 2016-12-22 | 宇部興産株式会社 | Cement composition and manufacturing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2503226B2 (en) | 1996-06-05 |
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