JPH0238532B2 - - Google Patents
Info
- Publication number
- JPH0238532B2 JPH0238532B2 JP60194058A JP19405885A JPH0238532B2 JP H0238532 B2 JPH0238532 B2 JP H0238532B2 JP 60194058 A JP60194058 A JP 60194058A JP 19405885 A JP19405885 A JP 19405885A JP H0238532 B2 JPH0238532 B2 JP H0238532B2
- Authority
- JP
- Japan
- Prior art keywords
- quick
- setting
- weight
- cement
- diethanolamine
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 36
- 239000004568 cement Substances 0.000 claims description 21
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003513 alkali Substances 0.000 claims description 15
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 14
- 239000003381 stabilizer Substances 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 7
- GDTSJMKGXGJFGQ-UHFFFAOYSA-N 3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B([O-])OB2OB([O-])OB1O2 GDTSJMKGXGJFGQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- WPUINVXKIPAAHK-UHFFFAOYSA-N aluminum;potassium;oxygen(2-) Chemical compound [O-2].[O-2].[Al+3].[K+] WPUINVXKIPAAHK-UHFFFAOYSA-N 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 19
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910021538 borax Inorganic materials 0.000 description 5
- 235000010339 sodium tetraborate Nutrition 0.000 description 5
- 239000004328 sodium tetraborate Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 150000004645 aluminates Chemical class 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 235000012208 gluconic acid Nutrition 0.000 description 3
- 239000011378 shotcrete Substances 0.000 description 3
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000174 gluconic acid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 235000002906 tartaric acid Nutrition 0.000 description 2
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 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
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 150000004691 decahydrates Chemical class 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000007589 penetration resistance test Methods 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
（産業上の利用分野）
本発明はセメント用急結剤に関する。
（従来の技術と問題点）
近年新しいトンネル工法であるナトム
（NATM）工法が定着し、吹付コンクリート施
工量が増加している。この吹付コンクリートに
は、セメント用急結剤の添加が不可欠であり、急
結剤としてはアルミン酸アルカリ塩や炭酸アルカ
リ塩等が知られている。例えばアルミン酸ソーダ
と炭酸ソーダとの粉末混合物を主成分とする粉末
急結剤や、アルミン酸カリウムと炭酸カリウムと
の混合水溶液を主成分とする液体急結剤等が市販
されている。前者の場合、モルタルやコンクリー
トを吹付施工する際、セメントと骨材との混合物
に急結剤を混入し、それを乾式吹付機で供給する
一方、ノズル先端付近で別系の圧送水と合流する
までは、粉流体の形で圧送されるので粉塵が発生
し作業環境を害したり、急結剤との混合が不均一
になつたり、さらには骨材の含有水分とセメント
と急結剤が反応して系路を閉塞する恐れがあるの
で、材料等の厳格な管理が必要である。後者の場
合は液体なので、上記のような欠点は免れるが、
急結性能を更に高めるのに有効な添加物が望まれ
ていた。
しかしながら、アルミン酸アルカリの水溶液は
化学的に不安定で貯蔵中に水酸化アルミニウムの
結晶が析出しやすく、これを防止するための安定
剤としてグルコン酸又はその塩や酒石酸又はその
塩等の添加（USP2345134号）が行われることが
多い。
このような場合、他の急結薬剤を添加するとア
ルミン酸アルカリの安定剤としての性能あるいは
これに付随して急結剤としての性能の損われるこ
とが多いという問題点があつた。
（発明の目的）
本発明者らは液体急結剤の長所を生かしつつ、
なおその急結性能を高めるため、種々検討を行つ
た結果本発明に到達した。本発明の目的はアルミ
ン酸アルカリ−炭酸アルカリ系の液体急結剤にお
いて、水酸化アルミニウムの析出を防止する安定
剤の存在下においても、さらに急結性能を高める
配合薬剤を提供することにある。
（発明の構成）
本発明はアルミン酸カリウムK2Oとして10〜20
重量％、Al2O3として５〜15重量％、炭酸カリウ
ムを15〜30重量％及び安定剤を含む水溶液に、ジ
エタノールアミンを0.1〜５重量％及び四ホウ酸
アルカリ塩を水和物として0.1〜５重量％配合し
たことを特徴とするナトム工法用のセメント急結
剤である。
上記アルミン酸カリウム及び炭酸カリウムは溶
解性や粘性の点で他のアルカリ塩より有利であ
る。アルミン酸カリウムと炭酸カリウムの水への
配合割合は、例えばアルミン酸カリウムを酸化カ
リウムとして10〜20重量％、酸化アルミニウムと
して５〜15重量％、また炭酸カリウムを15〜30重
量％に調整することが急結性能及び作業性向上の
ために必要である。上記ジエタノールアミンの配
合量は上記水溶液に対して0.1〜５重量％、特に
0.5〜３重量％が好ましく、５重量％をこえると、
急結剤が高濃度溶液の場合、ジエタノールアミン
が分離し易くなる。
上記四ホウ酸アルカリ塩としてはリチウム塩、
ナトリウム塩、カリウム塩等があるが、急結剤が
高濃度のアルカリ塩なので、そのいずれかを配合
しても効果は変わらない。従つて経済性の面から
ホウ砂として市販されている四ホウ酸ナトリウム
10水和物が望ましい。
四ホウ酸アルカリ塩の配合割合は上記水溶液に
対して水和物として0.1〜５重量％、好ましくは
0.5〜２重量％がよい。５重量％を越えると急結
性能が低下する。
本発明においては長期保存のため安定剤として
通常用いられるグルコン酸類や酒石酸類が好まし
く用いられる。
本発明において液体急結剤の配合成分としてジ
エタノールアミンを選択するのは以下の理由によ
る。この種のエタノールアミン類としてはモノエ
タノールアミン、ジエタノールアミン、トリエタ
ノールアミンがあり急結用成分としてはトリエタ
ノールアミンが一般に知られている。例えばグル
コン酸等の安定剤を含まないアルミン酸アルカリ
−炭酸アルカリ系の液体急結剤として多価アルコ
ールの配合を行うことが提案されている（特開昭
59−156946号）。しかしながらこの明細書中にお
いて検討されているのは主としてトリエタノール
アミンであつてジエタノールアミンの検討はされ
ていない。
これは当業界においてジエタノールアミンはト
リエタノールアミンより急結性能が劣るという技
術常識に基づくものと思われるが、本発明者らは
意外にも安定剤を含むアルミン酸アルカリ−炭酸
アルカリ系液体急結剤においてはジエタノールア
ミンがトリエタノールアミンのみでなくモノエタ
ノールアミンに比較してもセメントに配合した場
合の急結剤としての性能が格段に優れていること
を見出した。
本発明はジエタノールアミンに更に四ホウ酸ア
ルカリ塩を加えることによりジエタノールアミン
のみの場合より優れた急結性能が得られるという
知見により完成されたものである。
本発明品の使用方法は、吹付コンクリートの混
練水にあらかじめ溶解しておくか、ポンプ等を用
いて混練水に圧入混合するか、あるいは急結剤の
みをノズル先端に注入すればよい。使用量は通常
の吹付工事ではセメント量に対し１〜10重量％、
好ましくは４〜６重量％である。なお本発明に用
いられるセメントはポルトランドセメントが望ま
しいが、高炉セメント、シリカセメント、フライ
アツシユセメント等の混合セメントにも用いられ
る。
以下実施例により本発明を具体的に説明する
が、配合％は重量基準である。
実施例 １
アルミン酸カリウム（水溶液中のK2O13％、
Al2O39％）、炭酸カリウム25％、グルコン酸ナト
リウム0.2％の水溶液をＡ液とする。
このＡ液に対しジエタノールアミン０〜５％、
ホウ砂０〜２％添加して液体急結剤を作つた。
この液体急結剤の急結性能を比較するため、普
通ポルトランドセメント2000ｇ、川砂6000ｇ（F.
M.2.6、表面水率５％）、水をセメントに対し45
％、液体急結剤をセメントに対し４〜６％配合し
約15秒間混合してから素早く型枠に詰め、１分後
からプロクター貫入抵抗試験（ASTM Ｃ 403
−63T）を行い、始発（500PSI）と終結
（4000PSI）までの時間を測定した。その結果を
表−１と表−２に示す。なお試験は20℃で行つ
た。
(Industrial Application Field) The present invention relates to an quick-setting agent for cement. (Conventional technology and problems) In recent years, a new tunnel construction method, the NATM method, has become established, and the amount of shotcrete construction is increasing. It is essential to add a quick setting agent for cement to this shotcrete, and known quick setting agents include alkali aluminates and alkali carbonates. For example, a powder quick-setting agent whose main component is a powder mixture of sodium aluminate and soda carbonate, a liquid quick-set agent whose main component is a mixed aqueous solution of potassium aluminate and potassium carbonate, and the like are commercially available. In the former case, when spraying mortar or concrete, a quick-setting agent is mixed into the mixture of cement and aggregate, and while it is supplied by a dry sprayer, it is combined with pumped water from another system near the nozzle tip. Until now, the powder was pumped in the form of powder and fluid, which generated dust that harmed the working environment, caused uneven mixing with the quick-setting agent, and caused the moisture content in the aggregate to react with the cement and quick-set agent. Strict management of materials, etc. is required, as there is a risk of clogging the system. In the latter case, since it is a liquid, it avoids the drawbacks mentioned above, but
There has been a desire for an additive that is effective in further enhancing rapid setting performance. However, aqueous solutions of alkali aluminates are chemically unstable and aluminum hydroxide crystals tend to precipitate during storage. To prevent this, gluconic acid or its salts, tartaric acid or its salts, etc. are added as stabilizers. USP No. 2345134) is often carried out. In such cases, there has been a problem in that when other quick-setting agents are added, the performance of the alkali aluminate as a stabilizer or accompanying performance as a quick-setting agent is often impaired. (Object of the invention) The present inventors have made use of the advantages of liquid quick-setting agents,
In order to improve its rapid setting performance, various studies were conducted and the present invention was arrived at. An object of the present invention is to provide a compounded agent that further improves the quick-setting performance of an alkali aluminate-alkali carbonate liquid quick-setting agent even in the presence of a stabilizer that prevents precipitation of aluminum hydroxide. (Structure of the Invention) The present invention provides potassium aluminate K 2 O with 10 to 20
% by weight, 5-15% by weight as Al2O3 , 15-30% by weight of potassium carbonate, and a stabilizer in an aqueous solution containing 0.1-5% by weight of diethanolamine and 0.1-5% of alkali tetraborate as a hydrate. This is a cement quick-setting agent for the Natom construction method, characterized by containing 5% by weight. The above potassium aluminate and potassium carbonate are more advantageous than other alkali salts in terms of solubility and viscosity. The mixing ratio of potassium aluminate and potassium carbonate in water is adjusted to, for example, 10 to 20% by weight of potassium aluminate as potassium oxide, 5 to 15% by weight of aluminum oxide, and 15 to 30% by weight of potassium carbonate. is necessary to improve quick setting performance and workability. The amount of diethanolamine blended is 0.1 to 5% by weight based on the aqueous solution, especially
0.5 to 3% by weight is preferable, and if it exceeds 5% by weight,
When the quick-setting agent is a highly concentrated solution, diethanolamine is easily separated. The above-mentioned alkali tetraborate salts include lithium salts,
There are sodium salts, potassium salts, etc., but since the quick-setting agent is a highly concentrated alkali salt, the effect will not change even if you mix either of them. Therefore, from the economic point of view, sodium tetraborate, which is commercially available as borax,
Decahydrate is preferred. The blending ratio of the alkali tetraborate salt is 0.1 to 5% by weight as a hydrate based on the above aqueous solution, preferably
It is preferably 0.5 to 2% by weight. If it exceeds 5% by weight, the quick-setting performance will decrease. In the present invention, gluconic acids and tartaric acids, which are commonly used as stabilizers for long-term storage, are preferably used. The reason why diethanolamine is selected as a component of the liquid quick-setting agent in the present invention is as follows. Examples of this type of ethanolamine include monoethanolamine, diethanolamine, and triethanolamine, and triethanolamine is generally known as a quick-setting component. For example, it has been proposed that a polyhydric alcohol be blended as an alkali aluminate-alkali carbonate liquid quick-setting agent that does not contain stabilizers such as gluconic acid (Japanese Patent Application Laid-Open No.
59-156946). However, this specification mainly discusses triethanolamine and does not discuss diethanolamine. This seems to be based on the common general knowledge in the industry that diethanolamine has inferior quick setting performance to triethanolamine, but the present inventors unexpectedly found that an alkali aluminate-alkali carbonate liquid quick setting agent containing a stabilizer was used. found that diethanolamine has much better performance as an quick-setting agent when added to cement than not only triethanolamine but also monoethanolamine. The present invention was completed based on the finding that by further adding an alkali tetraborate salt to diethanolamine, a rapid setting performance superior to that of diethanolamine alone can be obtained. The product of the present invention can be used by dissolving it in advance in the mixing water for shotcrete, by press-mixing it into the mixing water using a pump, or by injecting only the quick-setting agent into the nozzle tip. In normal spraying work, the amount used is 1 to 10% by weight based on the amount of cement.
Preferably it is 4 to 6% by weight. The cement used in the present invention is preferably Portland cement, but mixed cements such as blast furnace cement, silica cement, and fly ash cement may also be used. The present invention will be specifically explained below with reference to Examples, in which the blending percentages are based on weight. Example 1 Potassium aluminate (13% K 2 O in aqueous solution,
Solution A is an aqueous solution containing 9% Al 2 O 3 ), 25% potassium carbonate, and 0.2% sodium gluconate. Diethanolamine 0-5% for this A solution,
A liquid quick setting agent was made by adding 0-2% of borax. In order to compare the quick setting performance of this liquid quick setting agent, 2000 g of ordinary Portland cement and 6000 g of river sand (F.
M.2.6, surface water rate 5%), water to cement 45
%, mix 4 to 6% liquid quick-setting agent to cement, mix for about 15 seconds, quickly fill the mold, and after 1 minute, pass the Proctor Penetration Resistance Test (ASTM C 403).
-63T) and measured the time from the start (500PSI) to the end (4000PSI). The results are shown in Table-1 and Table-2. The test was conducted at 20°C.
【表】
＊印は比較例を示す。
[Table] *marks indicate comparative examples.
【表】【table】
【表】
＊印は比較例を示す。
実施例 ２
実施例１におけるＡ液に、ジエタノールアミン
を３％とホウ砂を１％添加して作成した液体急結
剤の圧縮強度への影響をみるため、JIS Ｒ 5201
−９セメントの強さ試験を行つた。
普通ポルトランドセメント600ｇ、川砂1800ｇ
（F.M.2.6、表面水率５％）、水をセメントに対し
45％、液体急結剤をセメントに対し６％配合し約
10秒間混合してから素早く４×４×16cmの三連型
枠に詰め、脱型後所定材令まで、温度20℃、湿度
90％で養生した。なおＡ液のみ、および急結剤無
添加の場合の試験をも併せて行つた。その結果を
表−３に示す。なおＡ液のみ、および急結剤無添
加の場合の試験をも併せて行つた。[Table] *marks indicate comparative examples.
Example 2 In order to see the effect on compressive strength of a liquid quick-setting agent created by adding 3% diethanolamine and 1% borax to liquid A in Example 1, JIS R 5201 was used.
A strength test was conducted on -9 cement. 600g of ordinary Portland cement, 1800g of river sand
(FM2.6, surface water rate 5%), water to cement
45%, and 6% liquid quick-setting agent to the cement, approx.
Mix for 10 seconds, then quickly pack into a triple mold of 4 x 4 x 16 cm, and after demolding, heat to the specified material age at a temperature of 20℃ and humidity.
Cured at 90%. In addition, tests were also conducted using only Solution A and when no quick-setting agent was added. The results are shown in Table-3. In addition, tests were also conducted using only Solution A and when no quick-setting agent was added.
【表】
比較例
実施例１のＡ液に、モノエタノールアミン
（MEA）、ジエタノールアミン（DEA）、トリエ
タノールアミン（TEA）を３％添加し、３種類
の液体急結剤を作成した。これらの液体急結剤と
比較するためこれらの急結剤をそれぞれ実施例１
と同様にして対セメント比６％づつ配合し、凝結
試験を行つた。また強度への影響をみるため、こ
れらの急結剤をそれぞれ実施例２と同様にして対
セメント比６％づつ配合し、強度試験を行つた。
その結果を表−４に示す。[Table] Comparative Example 3% of monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA) were added to Liquid A of Example 1 to create three types of liquid quick-setting agents. For comparison with these liquid quick-setting agents, each of these quick-setting agents was used in Example 1.
In the same manner as above, 6% of cement was mixed and a setting test was conducted. In addition, in order to examine the effect on strength, each of these quick-setting agents was mixed in the same manner as in Example 2, at a ratio of 6% to cement, and a strength test was conducted.
The results are shown in Table 4.
【表】
以上のごとく本発明品は凝結試験においても強
度試験、特に急結効果上最も重要な初期強度（１
〜６時間）においても、Ａ液のみ配合の場合に比
較し明らかに顕著な急結性能を有している。
なお実施例１、２の本発明急結剤を室温にて３
ケ月間放置したところ、水酸化アルミニウム等の
結晶の析出は全く認められなかつた。またＡ液に
対しジエタノールアミンを６％とホウ砂を１％配
合した場合は少量のジエタノールアミンが上層に
分離しているのが観察された。
（発明の効果）
本発明セメント用急結剤は従来の液体急結剤に
比較して急結性が高いので、セメントに対する添
加量を減少することが可能で経済的に有利であ
り、特に初期強度が高いので特にナトム工法にお
いて有効に用いられる。また安定剤を配合するこ
とにより長期間性能を変化することなく保存しう
る。[Table] As shown above, the product of the present invention was tested for strength in setting tests, especially the initial strength (1
~6 hours), it clearly has a remarkable rapid setting performance compared to the case where only liquid A is blended. In addition, the present invention quick-setting agents of Examples 1 and 2 were mixed at room temperature.
After being left for several months, no precipitation of crystals such as aluminum hydroxide was observed. Furthermore, when 6% diethanolamine and 1% borax were blended into liquid A, a small amount of diethanolamine was observed to be separated into the upper layer. (Effects of the Invention) The quick-setting agent for cement of the present invention has higher quick-setting properties than conventional liquid quick-setting agents, so it is economically advantageous because it is possible to reduce the amount added to cement, especially in the initial stage. Because of its high strength, it is particularly effectively used in the natom construction method. Furthermore, by incorporating a stabilizer, the product can be stored for a long period of time without changing its performance.
Claims (1)
％、Al2O3として５〜15重量％、炭酸カリウムを
15〜30重量％及び安定剤を含む水溶液に、ジエタ
ノールアミンを0.1〜５重量％及び四ホウ酸アル
カリ塩を水和物として0.1〜５重量％配合したこ
とを特徴とするナトム工法用のセメント急結剤。1 Potassium aluminate as K2O 10-20% by weight, Al2O3 as 5-15% by weight, potassium carbonate
A quick setting cement for the Natom construction method, characterized in that 0.1 to 5% by weight of diethanolamine and 0.1 to 5% by weight of alkali tetraborate as a hydrate are blended into an aqueous solution containing 15 to 30% by weight and a stabilizer. agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19405885A JPS6256345A (en) | 1985-09-02 | 1985-09-02 | Accelerator for cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19405885A JPS6256345A (en) | 1985-09-02 | 1985-09-02 | Accelerator for cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6256345A JPS6256345A (en) | 1987-03-12 |
| JPH0238532B2 true JPH0238532B2 (en) | 1990-08-30 |
Family
ID=16318244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19405885A Granted JPS6256345A (en) | 1985-09-02 | 1985-09-02 | Accelerator for cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6256345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021149734A1 (en) | 2020-01-24 | 2021-07-29 | Ricoh Company, Ltd. | Sensor element and sensor system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2816954B1 (en) * | 2000-11-22 | 2003-01-03 | Innov Chimie Internat | AQUEOUS BOREAL SOLUTION, MAKE FROM A COMPOUND OF BORIC ACID AND SODIUM CARBONATE |
| CA2441101A1 (en) * | 2001-02-08 | 2002-08-15 | Kokuta, Hiroshi | Inorganic dissolution accelerator making metal or inorganic substance water-soluble |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5386726A (en) * | 1977-01-10 | 1978-07-31 | Shinichi Suzuki | Method for production of cement mixtures |
| JPS57183339A (en) * | 1981-04-30 | 1982-11-11 | Sumitomo Cement Co | Super-quick setting cement |
| JPS58151356A (en) * | 1982-03-03 | 1983-09-08 | 水澤化学工業株式会社 | Hydraulic cement composition |
-
1985
- 1985-09-02 JP JP19405885A patent/JPS6256345A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5386726A (en) * | 1977-01-10 | 1978-07-31 | Shinichi Suzuki | Method for production of cement mixtures |
| JPS57183339A (en) * | 1981-04-30 | 1982-11-11 | Sumitomo Cement Co | Super-quick setting cement |
| JPS58151356A (en) * | 1982-03-03 | 1983-09-08 | 水澤化学工業株式会社 | Hydraulic cement composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021149734A1 (en) | 2020-01-24 | 2021-07-29 | Ricoh Company, Ltd. | Sensor element and sensor system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6256345A (en) | 1987-03-12 |
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