JPH0455353A - Quick-hardening admixture of cement - Google Patents
Quick-hardening admixture of cementInfo
- Publication number
- JPH0455353A JPH0455353A JP16276090A JP16276090A JPH0455353A JP H0455353 A JPH0455353 A JP H0455353A JP 16276090 A JP16276090 A JP 16276090A JP 16276090 A JP16276090 A JP 16276090A JP H0455353 A JPH0455353 A JP H0455353A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- weight
- cao
- admixture
- mixed
- 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
- 239000004568 cement Substances 0.000 title claims description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000004898 kneading Methods 0.000 abstract description 11
- 229910052708 sodium Inorganic materials 0.000 abstract description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 2
- 229910004642 Na2O—Al2O3 Inorganic materials 0.000 abstract 2
- 229910052925 anhydrite Inorganic materials 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000011734 sodium Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、Ｃａ０−Ｎａ２Ｏ−Ａ ｌ ｔｏｓ系焼成物
または溶融物（以下、ＣＮＡクリンカという）と硫酸カ
ルシウムからなるセメントの急硬性混和剤に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rapid hardening admixture for cement consisting of a Ca0-Na2O-Al tos based calcined or melted product (hereinafter referred to as CNA clinker) and calcium sulfate. It is something.
ポルトランドセメントの初期強度を増大するため、従来
から種々の混和剤が提案されている。例えば、カルシウ
ムアルミネートと硫酸カルシウムからなる混和剤、この
混和剤にさらにＮａｇＣＯａ等の無機塩類を加えたセメ
ントの強度促進剤が知られている。Various admixtures have been proposed to increase the initial strength of Portland cement. For example, an admixture consisting of calcium aluminate and calcium sulfate, and a cement strength promoter made by adding an inorganic salt such as NagCOa to this admixture are known.
カルシウムアルミネートと硫酸カルシウムとからなる混
和剤を用いた場合には、そのセメントは混練してから数
時間後における圧縮強度が低いうえ、混練直後から混練
物の流動性が失われるため、施工が困難となる。When using an admixture consisting of calcium aluminate and calcium sulfate, the cement has a low compressive strength several hours after being mixed, and the fluidity of the mixed product is lost immediately after mixing, making it difficult to apply. It becomes difficult.
また、この混和剤にさらにＮａｇＣＯ，等の無機塩類を
加えた強度促進剤を用いた場合には、混練してから数時
間後における圧縮強度は高いが、混線後、数分から硬化
が始るため、施工が著しく困難となる。In addition, when using a strength accelerator in which an inorganic salt such as NagCO is added to this admixture, the compressive strength is high several hours after kneading, but hardening starts within a few minutes after mixing. , construction becomes extremely difficult.
以上のように、従来の混和剤は、一長一短を有していた
ため、施工方針にしたがって、適宜該混和剤を選択する
必要があった。As described above, since conventional admixtures have advantages and disadvantages, it is necessary to appropriately select the admixture according to the construction policy.
そこで、本発明者らは、前記従来技術の欠点を解消する
ため、セメントに添加し、混練した後、その混線物があ
る時間流動性を有し、その後、すみやかに急速硬化する
混和剤について研究した結果、本発明を完成するに至っ
た。Therefore, in order to eliminate the drawbacks of the prior art, the present inventors conducted research on an admixture that, after being added to cement and kneaded, has fluidity for a certain period of time, and then quickly hardens. As a result, the present invention was completed.
すなわち、本発明の要旨は、ＣａＯ％ Ｎａ１Ｏおよび
Ａ １．０．に換算して、ＣａＯが２０〜５３重量％、
Ｎａ、Ｏが２〜２０重量％およびＡ ｌ ｔｏ、が３５
〜７５重量％であるＣＮＡクリンカが３５〜８０重量％
、硫酸カルシウムが２０〜６５％の組成からなるセメン
トの急硬性混和剤にある。That is, the gist of the present invention is that CaO% Na1O and A 1.0. CaO is 20 to 53% by weight in terms of
2 to 20% by weight of Na, O and 35% of Al to
~75 wt% CNA clinker is 35-80 wt%
, a rapid hardening admixture for cement having a composition of 20 to 65% calcium sulfate.
ＣＮＡクリンカの原料には、Ｃａ源としてＣａＣ０，、
、ＣａＯ、Ｃａ （ＯＨ） ｇ等が、Ｎａ源としてＮａ
、ＣＯ，等が、Ａｌ源としてＡ ７１ ｇｏｚ 、Ａ
１ （ＯＨ）ｓ等が使用できる。The raw material for CNA clinker contains CaC0,...
, CaO, Ca (OH) g, etc. as Na sources.
, CO, etc. as the Al source A 71 goz , A
1 (OH)s etc. can be used.
なお、Ｎａと八ｌの共通源としてアルミン酸ナトリウム
も使用できる。Note that sodium aluminate can also be used as a common source of Na and 8L.
ＣＮＡクリンカは、Ｃａ源、Ｎａ源およびＡｌ源を慣用
の手段で混合した後、混合原料を電気炉、ロータリーキ
ルン等の加熱炉で１３００℃以上、好ましくは１５００
℃〜１８００℃、１５分以上焼成または溶融し、冷却後
得られたクリンカをブレーン値で３０００ｃｍ冨／ｇ以
上、好ましくは４０００〜６０００ ｃｓ＋”／ ｇに
粉砕したものを用いる。該クリンカには、３ＣａＯ・２
Ｎａ２０ ・５Ａ ｌ ｔｏ３等の結晶およびガラス
質が含まれる。CNA clinker is produced by mixing a Ca source, a Na source, and an Al source by a conventional means, and then heating the mixed raw material in a heating furnace such as an electric furnace or a rotary kiln to 1300°C or higher, preferably 1500°C.
The clinker obtained by firing or melting at 1800°C to 1800°C for 15 minutes or more and cooling is pulverized to a Blaine value of 3000 cm/g or more, preferably 4000 to 6000 cs+"/g. The clinker includes the following: 3CaO・2
Contains crystals and glass such as Na20 ・5A l to3.
ＣＮＡクリンカの組成は、ＣａＯ、Ｎａｐ、および＾１
２０．に換算して、ＣａＯが２０〜５３重量％、Ｎａ、
０が２〜２０重量％およびＡｌｇＯｌが３５〜７５重量
％である。The composition of CNA clinker is CaO, Nap, and ^1
20. Converted to 20 to 53% by weight of CaO, Na,
2-20% by weight of AlgOl and 35-75% by weight of AlgOl.
ＣａＯが２０重量％未満では、水和反応性が低く、混練
してから数時間後での強度発現が低い。一方、ＣａＯが
５３３重丸を超えると、遊離ＣａＯが大量に生成し、水
と混練した際Ｃａ （ＯＨ） ｚとなって部分的な膨張
を生じるため好ましくない。If CaO is less than 20% by weight, hydration reactivity is low and strength development after several hours after kneading is low. On the other hand, when CaO exceeds 533 circles, a large amount of free CaO is generated, which becomes Ca (OH) z when kneaded with water and causes partial expansion, which is not preferable.
Ｎａ、Ｏが２重量％未満では、従来のカルシウムアルミ
ネートの場合と同様に、混練後数分で流動性が失われる
ため好ましくない。一方、２０重量％を超えると、初期
強度の発現が低いうえに焼成中Ｎａ、０の揮発が多くな
り、炉の損傷が激しく実用的でない。If Na and O are less than 2% by weight, fluidity is lost within a few minutes after kneading, which is not preferable, as in the case of conventional calcium aluminate. On the other hand, if it exceeds 20% by weight, the initial strength is low and more Na and 0 volatilize during firing, causing severe damage to the furnace and impractical.
Ａ １．０．が３５重量％未満の場合は、ＣａＯが５３
重量％を超える場合と同様の現象が起こり好ましくない
。一方、Ａ ｌ ｇｏｚが７５重量％を超えると、水和
反応性が低く、混練してから数時間後の強度が低い。A 1.0. is less than 35% by weight, CaO is less than 53% by weight.
When the amount exceeds % by weight, the same phenomenon occurs, which is not preferable. On the other hand, when A l goz exceeds 75% by weight, the hydration reactivity is low and the strength after several hours of kneading is low.
硫酸カルシウムは、二水塩、半水塩および無水塩のいず
れも使用できる。Calcium sulfate can be used in the form of dihydrate, hemihydrate, or anhydrous salt.
ＣＮＡクリンカは、８０重量％を上限とし、これよりも
多いと、混線直後より硬化が始り、混練物の流動性が失
われ、施工が困難となる。一方、３５重量％未満では、
混練してから数時間後の圧縮強度が低くなる。The upper limit of CNA clinker is 80% by weight, and if the amount exceeds this, hardening will begin immediately after the wires are mixed, the fluidity of the kneaded product will be lost, and construction will become difficult. On the other hand, if it is less than 35% by weight,
Compressive strength decreases several hours after kneading.
硫酸カルシウムは、６５重量％を上限とし、これよめも
多いと、混練してから数時間後の圧縮強度゛が低くなる
。一方、２０重量％未満では、混練直後より硬化が始り
、混練物の流動性が失われ施工が困難となる。The upper limit of calcium sulfate is 65% by weight, and if it exceeds 65% by weight, the compressive strength after several hours of kneading will decrease. On the other hand, if it is less than 20% by weight, hardening will begin immediately after kneading, and the fluidity of the kneaded product will be lost, making construction difficult.
ＣＮＡクリンカおよび硫酸カルシウムは、慣用の設備を
用いて適当な細かさに粉砕し、前記組成範囲に入るよう
に配合したのち、慣用のミキサーで混合すれば、本発明
の急硬性混和剤が得られる。CNA clinker and calcium sulfate are ground to appropriate fineness using conventional equipment, blended to fall within the above composition range, and then mixed using a conventional mixer to obtain the rapid hardening admixture of the present invention. .
本発明の急硬性混和剤の添加量は、セメントに対し、３
〜３０重量％が望ましい。３０ｆｉ１％を超えると、混
練直後より硬化が始るため、混練物の流動性が失われ、
施工が困難となる。The amount of the rapid hardening admixture of the present invention added is 3
~30% by weight is desirable. When it exceeds 30fi1%, hardening starts immediately after kneading, and the fluidity of the kneaded product is lost.
Construction becomes difficult.
本発明の急硬性混和剤は、ポルトランドセメント以外の
フライアッシュセメントあるいは高炉セメントに添加し
て使用することもできる。The rapid hardening admixture of the present invention can also be used by being added to fly ash cement or blast furnace cement other than Portland cement.
（実施例〕
実施例１〜２、比較例１〜３
Ｃａ源として白服化学研究所■製のＣａＣ０，、Ｎａ源
として東洋曹達■製のＮａ２ＣＯ３およびＡｌ源として
昭和電工■製のＡ １ ｔＯｚを第１表に示す組成にな
るように配合し、ボールミルで混合粉砕し、得た混合原
料を工業用電気炉内で、１７００℃で１５分間溶融させ
、その後傾から取り出して冷却した。得られたクリンカ
をボールミルでブレーン値５０００ｃｍ”７ｇに粉砕し
、第１表に示す組成のクリンカを得た。(Examples) Examples 1 to 2, Comparative Examples 1 to 3 CaC0, manufactured by Hakufuku Kagaku Kenkyusho ■ as a Ca source, Na2CO3 manufactured by Toyo Soda ■ as a Na source, and A 1 tOz manufactured by Showa Denko ■ as an Al source. were blended to have the composition shown in Table 1, mixed and pulverized in a ball mill, and the resulting mixed raw material was melted in an industrial electric furnace at 1700°C for 15 minutes, then taken out from the incline and cooled. The clinker obtained was ground to 7 g with a Blaine value of 5000 cm'' using a ball mill to obtain clinker having the composition shown in Table 1.
吉野石膏■製の食品添加用硫酸カルシウムを６００℃で
１時間電気炉で加熱処理し、ボールミルでブレーン値５
０００ ｃｍ！／ ｇに粉砕した無水石こうと第１表に
示すクリンカとを第２表に示す割合にＶ型混合機で混合
し、急硬性混和剤を製造した。Calcium sulfate for food additives made from Yoshino Gypsum ■ was heat-treated in an electric furnace at 600℃ for 1 hour, and the Blaine value was 5 in a ball mill.
000 cm! /g of anhydrous gypsum and the clinker shown in Table 1 were mixed in the ratio shown in Table 2 using a V-type mixer to produce a rapid hardening admixture.
第２表
日本セメント■製の普通ポルトランドセメント、豊浦標
準砂：相馬珪砂特４号（１６８０〜１１９０μ）：相馬
珪砂３号（１１９０〜５９０μ）＝１：１：１の混合砂
および第２表に示す配合の急硬性混和剤６種類を用い、
混合砂／セメント−３、水／セメント−０，５および急
硬性混和剤／セメンｌ−＝ ０．１の配合にしてモルタ
ルミキサーで混練した。その混線物の混練開始より３０
分後のフロー値、凝結時間および圧縮強度を測定し、結
果を第３表に示した。Table 2 Ordinary Portland cement manufactured by Nippon Cement ■, Toyoura standard sand: Soma silica sand special No. 4 (1680-1190μ): Soma silica sand No. 3 (1190-590μ) = 1:1:1 mixed sand and Table 2 Using six types of rapid hardening admixtures with the composition shown,
Mixed sand/cement-3, water/cement-0.5, and rapid hardening admixture/cement l-=0.1 were mixed in a mortar mixer. 30 minutes from the start of mixing of the mixed material
The flow value after minutes, setting time and compressive strength were measured and the results are shown in Table 3.
なお、混練物のフロー値の測定は、ＪＩＳＲ５２０１に
規定した試験機を用いて測定した。凝結時間の測定は、
コンクリートの凝結時間試験方法（ＪＩＳＡ６２０４付
属書ｌ）に準じて行なった。圧縮強度については、２４
時間、２０℃で湿空養生し、その後は２０℃で水中養生
し、第３表に示す各材令について、ＪＩＳＲ５２０１に
規定した試験機を用いて強度測定した。The flow value of the kneaded material was measured using a tester specified in JISR5201. Measuring the setting time is
The test was conducted in accordance with the concrete setting time test method (JISA6204 Appendix 1). For compressive strength, 24
The samples were cured in a humid air at 20°C for an hour, and then cured in water at 20°C, and the strength of each material shown in Table 3 was measured using a testing machine specified in JISR5201.
第３表に示すように、本発明の急硬性混和剤を添加した
場合、混練後３０分以上流動性を有し、その後急速硬化
した。As shown in Table 3, when the rapid hardening admixture of the present invention was added, it had fluidity for 30 minutes or more after kneading, and then rapidly hardened.
本発明は特定範囲のＣＮＡクリンカと硫酸カルシウムを
組合せたセメントの急硬性混和剤であり、これをセメン
トに用いることにより、混練後ある時間流動性を有し、
その後急速硬化し、がっ長期強度も高く維持することが
できる。The present invention is a rapid hardening admixture for cement that combines a specific range of CNA clinker and calcium sulfate, and by using this in cement, it has fluidity for a certain period of time after kneading.
After that, it hardens quickly and maintains high long-term strength.
特許出願人 日本セメント株式会社Patent applicant: Nippon Cement Co., Ltd.
Claims (1)
して、ＣａＯが２０〜５３重量％、Ｎａ＿２Ｏが２〜２
０重量％およびＡｌ＿１Ｏ＿３が３５〜７５重量％であ
る焼成物または溶融物が３５〜８０重量％、硫酸カルシ
ウムが２０〜６５重量％の組成からなるセメントの急硬
性混和剤。(1) Calculated as CaO, Na_2O and Al_2O_3, CaO is 20-53% by weight, Na_2O is 2-2%
A rapid hardening admixture for cement comprising a composition of 35-80% by weight of a fired product or melt containing 0% by weight and 35-75% by weight of Al_1O_3, and 20-65% by weight of calcium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16276090A JP2832862B2 (en) | 1990-06-22 | 1990-06-22 | Rapid cement admixture for cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16276090A JP2832862B2 (en) | 1990-06-22 | 1990-06-22 | Rapid cement admixture for cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455353A true JPH0455353A (en) | 1992-02-24 |
| JP2832862B2 JP2832862B2 (en) | 1998-12-09 |
Family
ID=15760709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16276090A Expired - Fee Related JP2832862B2 (en) | 1990-06-22 | 1990-06-22 | Rapid cement admixture for cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2832862B2 (en) |
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1990
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| US10427954B2 (en) | 2006-11-14 | 2019-10-01 | Atlantium Technologies Ltd | Method and apparatus for liquid disinfection using light transparent conduit |
| US10494273B2 (en) | 2006-11-14 | 2019-12-03 | Atlantium Technologies Ltd | Method and apparatus for liquid disinfection using light transparent conduit |
| US11104590B2 (en) | 2015-09-07 | 2021-08-31 | Nikkiso Co., Ltd. | Sterilization device using straightener and UV LED array facing the straightener |
| US10472260B2 (en) | 2015-12-08 | 2019-11-12 | Nikkiso Co., Ltd. | Fluid sterilization device |
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| Publication number | Publication date |
|---|---|
| JP2832862B2 (en) | 1998-12-09 |
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